{"id":3961,"date":"2026-06-30T08:16:37","date_gmt":"2026-06-30T08:16:37","guid":{"rendered":"https:\/\/manufactorhinge.com\/?p=3961"},"modified":"2026-06-30T08:20:02","modified_gmt":"2026-06-30T08:20:02","slug":"sus-304-vs-sus-316-stainless-steel-hinges","status":"publish","type":"post","link":"https:\/\/manufactorhinge.com\/pt\/sus-304-vs-sus-316-stainless-steel-hinges\/","title":{"rendered":"Dobradi\u00e7as SUS 304 vs SUS 316 | Guia de tipos de a\u00e7o inoxid\u00e1vel"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><strong>Opte pelo a\u00e7o inoxid\u00e1vel SUS 304 para dobradi\u00e7as de uso geral ao ar livre, em ambientes sujeitos a lavagem com jato de \u00e1gua e na ind\u00fastria alimentar, e opte pelo SUS 316 quando houver cloretos \u2014 locais costeiros, equipamento mar\u00edtimo, sal de descongelamento e muitos ambientes qu\u00edmicos \u2014, pois o molibd\u00e9nio adicionado ao 316 \u00e9 o que lhe confere resist\u00eancia \u00e0 corros\u00e3o por pite que o 304 n\u00e3o possui.<\/strong> Ambas as classes s\u00e3o a\u00e7os inoxid\u00e1veis resistentes \u00e0 corros\u00e3o e t\u00eam um aspeto id\u00eantico; a diferen\u00e7a reside no seu comportamento quando h\u00e1 sal ou produtos qu\u00edmicos no ar ou na \u00e1gua. Este guia explica a verdadeira diferen\u00e7a e como escolher a classe adequada para uma dobradi\u00e7a em fun\u00e7\u00e3o do ambiente, para que n\u00e3o se utilize uma porta costeira com especifica\u00e7\u00f5es insuficientes nem se pague a mais pelo 316 quando o 304 \u00e9 mais do que suficiente.<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_1 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u00cdndice<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Alternar o \u00edndice\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Alternar<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/manufactorhinge.com\/pt\/sus-304-vs-sus-316-stainless-steel-hinges\/#What_actually_differs_between_304_and_316\" >O que \u00e9 que, na verdade, diferencia o 304 do 316?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/manufactorhinge.com\/pt\/sus-304-vs-sus-316-stainless-steel-hinges\/#Why_a_hinge_corrodes_earlier_than_flat_stainless\" >Por que \u00e9 que uma dobradi\u00e7a se corr\u00f3i mais cedo do que o a\u00e7o inoxid\u00e1vel liso?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/manufactorhinge.com\/pt\/sus-304-vs-sus-316-stainless-steel-hinges\/#How_to_choose_the_grade_by_environment\" >Como escolher o tipo de material em fun\u00e7\u00e3o do ambiente<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/manufactorhinge.com\/pt\/sus-304-vs-sus-316-stainless-steel-hinges\/#From_the_field_316_hinges_on_a_boat_hatch\" >Do terreno: 316 dobradi\u00e7as numa escotilha de barco<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/manufactorhinge.com\/pt\/sus-304-vs-sus-316-stainless-steel-hinges\/#Beyond_the_grade_finish_and_dissimilar_metals\" >Para al\u00e9m da classe: acabamento e metais diferentes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/manufactorhinge.com\/pt\/sus-304-vs-sus-316-stainless-steel-hinges\/#RFQ_checklist_for_stainless_hinges\" >Lista de verifica\u00e7\u00e3o para pedidos de cota\u00e7\u00e3o de dobradi\u00e7as em a\u00e7o inoxid\u00e1vel<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/manufactorhinge.com\/pt\/sus-304-vs-sus-316-stainless-steel-hinges\/#FAQ\" >FAQ<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Resposta r\u00e1pida:<\/strong> 304 para uso industrial geral, ao ar livre e em ambientes sujeitos a lavagem; 316 nos casos em que a exposi\u00e7\u00e3o ao cloreto \u00e9 real \u2014 em ambientes costeiros, marinhos, salinos ou qu\u00edmicos. Em caso de d\u00favida, quando se estiver perto de \u00e1gua salgada, a especifica\u00e7\u00e3o 316 \u00e9 a mais segura. A escolha do material insere-se na sele\u00e7\u00e3o mais ampla abordada em <a href=\"https:\/\/manufactorhinge.com\/pt\/how-to-choose-industrial-hinge\/\">Como escolher uma dobradi\u00e7a industrial<\/a>; esta p\u00e1gina trata especificamente da decis\u00e3o relativa \u00e0s notas.<\/p>\n\n\n\n<h2 id=\"what-actually-differs-between-304-and-316\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_actually_differs_between_304_and_316\"><\/span>O que \u00e9 que, na verdade, diferencia o 304 do 316?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ambos s\u00e3o a\u00e7os inoxid\u00e1veis austen\u00edticos com cr\u00f3mio e n\u00edquel, e ambos formam uma camada de \u00f3xido passiva que resiste \u00e0 ferrugem. A diferen\u00e7a decisiva \u00e9 que o 316 cont\u00e9m cerca de 2\u20133% <strong>molibd\u00e9nio<\/strong>, o que melhora significativamente a resist\u00eancia a <em>corros\u00e3o por pite e corros\u00e3o em fendas<\/em> devido aos cloretos. Na pr\u00e1tica, \u00e9 isso que acontece: em ambientes com ar limpo, interiores secos ou chuva normal, os tipos 304 e 316 apresentam um desempenho praticamente id\u00eantico, sendo o 304 a escolha mais sensata e econ\u00f3mica. Quando se introduzem cloretos \u2014 salpicos do mar, humidade costeira, sal de estrada, ambientes de piscina ou muitos produtos qu\u00edmicos de processo \u2014, o 304 pode desenvolver picadas e riscas de ferrugem, enquanto o 316 mant\u00e9m a sua superf\u00edcie intacta. Uma dobradi\u00e7a fica especialmente exposta neste caso, pois possui pe\u00e7as m\u00f3veis e fendas estreitas \u00e0 volta do pino e das folhas, exatamente onde a corros\u00e3o em fendas costuma come\u00e7ar.<\/p>\n\n\n\n<h2 id=\"why-a-hinge-corrodes-earlier-than-flat-stainless\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_a_hinge_corrodes_earlier_than_flat_stainless\"><\/span>Por que \u00e9 que uma dobradi\u00e7a se corr\u00f3i mais cedo do que o a\u00e7o inoxid\u00e1vel liso?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Um painel plano de a\u00e7o inoxid\u00e1vel e uma dobradi\u00e7a de a\u00e7o inoxid\u00e1vel fabricada com o mesmo tipo de a\u00e7o n\u00e3o envelhecem da mesma forma, e vale a pena saber porqu\u00ea antes de escolher um tipo de a\u00e7o. Uma dobradi\u00e7a apresenta exatamente as caracter\u00edsticas que a corros\u00e3o explora: o pino e a articula\u00e7\u00e3o formam espa\u00e7os estreitos e sobrepostos, as folhas sobrep\u00f5em-se com uma fina pel\u00edcula de humidade entre elas, e os orif\u00edcios dos parafusos e as ranhuras dos fixadores ret\u00eam \u00e1gua e contaminantes. Trata-se de fendas, e a corros\u00e3o em fendas necessita apenas de um pouco de humidade retida, rica em cloretos, para se iniciar \u2014 num local onde n\u00e3o possa ser enxaguada nem secar. Assim, uma dobradi\u00e7a pode apresentar ferrugem onde um painel liso do mesmo a\u00e7o permanece limpo. No caso do a\u00e7o 304 num ambiente com cloretos, os primeiros sinais s\u00e3o previs\u00edveis: manchas de ferrugem e riscas castanhas perto dos orif\u00edcios dos parafusos, corros\u00e3o por pite na zona do pino e uma articula\u00e7\u00e3o que se torna gradualmente mais r\u00edgida \u00e0 medida que os produtos da corros\u00e3o se acumulam na articula\u00e7\u00e3o. Essa vulnerabilidade na articula\u00e7\u00e3o \u00e9 a verdadeira raz\u00e3o pela qual a escolha do tipo de a\u00e7o \u00e9 mais importante para uma dobradi\u00e7a do que para a chapa met\u00e1lica \u00e0 sua volta.<\/p>\n\n\n\n<h2 id=\"how-to-choose-the-grade-by-environment\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_choose_the_grade_by_environment\"><\/span>Como escolher o tipo de material em fun\u00e7\u00e3o do ambiente<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Ambiente<\/th><th>N\u00edvel recomendado<\/th><th>Porqu\u00ea<\/th><\/tr><\/thead><tbody><tr><td>Industrial em ambiente interior seco<\/td><td>304 (ou revestido\/zincado, por uma quest\u00e3o de custo)<\/td><td>Sem carga de cloreto; o 316 \u00e9 desnecess\u00e1rio<\/td><\/tr><tr><td>Exposi\u00e7\u00e3o geral ao ar livre e \u00e0 chuva<\/td><td>304<\/td><td>Resiste bem \u00e0s condi\u00e7\u00f5es meteorol\u00f3gicas sem a presen\u00e7a de cloretos<\/td><\/tr><tr><td>Lavagem \/ alimentos e bebidas<\/td><td>304 (316 para desinfectantes agressivos)<\/td><td>O 304 \u00e9 adequado para a maioria das aplica\u00e7\u00f5es que envolvem lavagem com \u00e1gua; o 316, para produtos qu\u00edmicos agressivos<\/td><\/tr><tr><td>Litoral \/ perto do ar salgado<\/td><td>316<\/td><td>O ar com elevado teor de cloreto corr\u00f3i o a\u00e7o 304 ao longo do tempo<\/td><\/tr><tr><td>Mar\u00edtimo \/ na \u00e1gua<\/td><td>316<\/td><td>A exposi\u00e7\u00e3o direta ao sal requer molibd\u00e9nio<\/td><\/tr><tr><td>Sal qu\u00edmico \/ sal de descongelamento<\/td><td>316<\/td><td>Os cloretos agressivos atacam o a\u00e7o 304<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A regra pr\u00e1tica que a maioria dos engenheiros segue: especificar o 304 por predefini\u00e7\u00e3o e optar pelo 316 assim que os cloretos entrarem em cena. O custo adicional do 316 \u00e9 real, pelo que n\u00e3o \u00e9 automaticamente a escolha \u201cmelhor\u201d \u2014 \u00e9 a escolha certa nos ambientes em que o 304 falharia prematuramente. O erro que mais custa \u00e9 o contr\u00e1rio: instalar uma dobradi\u00e7a de 304 numa porta costeira ou mar\u00edtima para poupar dinheiro e, depois, ter de substituir as dobradi\u00e7as enferrujadas ao fim de um ou dois anos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Uma advert\u00eancia no sentido contr\u00e1rio: o 316 \u00e9 mais resistente ao cloreto, mas n\u00e3o \u00e9 \u00e0 prova de ferrugem. Pode ainda assim sofrer corros\u00e3o se a sua superf\u00edcie estiver contaminada ou mal acabada, se a \u00e1gua salgada ficar retida numa fenda e nunca secar, ou se for aparafusado com fixadores inadequados numa junta h\u00famida. Escolher o 316 \u00e9 a decis\u00e3o certa para ambientes com cloreto, mas isso n\u00e3o elimina a necessidade de um acabamento limpo, drenagem e fixadores adequados.<\/p>\n\n\n\n<h2 id=\"from-the-field-316-hinges-on-a-boat-hatch\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"From_the_field_316_hinges_on_a_boat_hatch\"><\/span>Do terreno: 316 dobradi\u00e7as numa escotilha de barco<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch-1024x768.webp\" alt=\"Dobradi\u00e7as de a\u00e7o inoxid\u00e1vel SUS 316 numa escotilha de barco, num ambiente marinho de \u00e1gua salgada\" class=\"wp-image-3962\" style=\"width:791px;height:auto\" srcset=\"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch-1024x768.webp 1024w, https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch-300x225.webp 300w, https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch-768x576.webp 768w, https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch-16x12.webp 16w, https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch.webp 1448w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A escotilha aqui apresentada \u00e9 um exemplo claro da utiliza\u00e7\u00e3o do a\u00e7o 316. Estas s\u00e3o <strong>Dobradi\u00e7as de a\u00e7o inoxid\u00e1vel 316 numa escotilha de barco<\/strong> \u2014 uma porta de um compartimento de armazenamento num conv\u00e9s aberto, diretamente exposta diariamente \u00e0 n\u00e9voa salina e ao ar marinho h\u00famido. Este \u00e9 o ambiente que o 304 n\u00e3o consegue suportar por muito tempo: a carga de cloretos come\u00e7aria a corroer a superf\u00edcie e a infiltrar-se nas fendas do pino e da folha, e num navio uma dobradi\u00e7a de escotilha corro\u00edda constitui tanto um problema de manuten\u00e7\u00e3o como de seguran\u00e7a. O molibd\u00e9nio presente no 316 est\u00e1 a cumprir exatamente a fun\u00e7\u00e3o para a qual foi concebido, mantendo a superf\u00edcie e a articula\u00e7\u00e3o m\u00f3vel em bom estado, mesmo sob exposi\u00e7\u00e3o cont\u00ednua ao sal. \u00c9 a ilustra\u00e7\u00e3o mais simples da regra: quando a aplica\u00e7\u00e3o se situa na \u00e1gua salgada ou nas suas proximidades, a escolha do tipo de a\u00e7o j\u00e1 est\u00e1 decidida.<\/p>\n\n\n\n<h2 id=\"beyond-the-grade-finish-and-dissimilar-metals\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Beyond_the_grade_finish_and_dissimilar_metals\"><\/span>Para al\u00e9m da classe: acabamento e metais diferentes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e1 dois aspetos relacionados que determinam se mesmo a nota certa se mant\u00e9m. Em primeiro lugar, <strong>concluir<\/strong>: uma superf\u00edcie limpa, passivada ou polida resiste melhor \u00e0 corros\u00e3o do que uma superf\u00edcie rugosa ou contaminada, uma vez que as picadas de corros\u00e3o t\u00eam origem em defeitos superficiais e em part\u00edculas de ferro incrustadas \u2014 por isso, um a\u00e7o 304 com um bom acabamento pode apresentar um desempenho superior ao de um com um acabamento deficiente, e a passiva\u00e7\u00e3o \u00e9 importante em ambos os tipos de a\u00e7o. Em segundo lugar, <strong>metais diferentes<\/strong>: a combina\u00e7\u00e3o de uma dobradi\u00e7a em a\u00e7o inoxid\u00e1vel com parafusos ou uma moldura de um metal muito diferente, numa junta sujeita a humidade e sal, pode provocar corros\u00e3o galv\u00e2nica; por isso, deve-se escolher parafusos do mesmo material que a dobradi\u00e7a e prestar aten\u00e7\u00e3o ao material ao qual a dobradi\u00e7a est\u00e1 aparafusada. No caso das portas mais pesadas nestes ambientes, deve-se verificar em conjunto a carga e a classe de resist\u00eancia \u2014 a <a href=\"https:\/\/manufactorhinge.com\/pt\/products\/industrial-hinges\/heavy-duty-hinges\/\">gama de dobradi\u00e7as para uso intensivo<\/a> \u00e9 disponibilizado em tipos de a\u00e7o inoxid\u00e1vel para locais corrosivos.<\/p>\n\n\n\n<h2 id=\"rfq-checklist-for-stainless-hinges\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"RFQ_checklist_for_stainless_hinges\"><\/span>Lista de verifica\u00e7\u00e3o para pedidos de cota\u00e7\u00e3o de dobradi\u00e7as em a\u00e7o inoxid\u00e1vel<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Quando solicitar um or\u00e7amento, a decis\u00e3o sobre a classe ser\u00e1 mais r\u00e1pida se indicar o ambiente e o tipo de porta, e n\u00e3o apenas \u201ca\u00e7o inoxid\u00e1vel\u201d. Copie e preencha:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>PEDIDO DE OR\u00c7AMENTO PARA DOBRADI\u00c7AS DE A\u00c7O INOXID\u00c1VEL\n-------------------\nAmbiente de funcionamento (interior \/ exterior \/ lav\u00e1vel \/ costeiro \/ mar\u00edtimo \/ qu\u00edmico):\nExposi\u00e7\u00e3o ao sal ou ao cloreto (nenhuma \/ ocasional \/ constante):\nGrau exigido ou recomendado (304 \/ 316):\nAcabamento (passivado \/ polido \/ escovado):\nMaterial dos elementos de fixa\u00e7\u00e3o (a condizer com o grau da dobradi\u00e7a):\nPeso da porta:\nN\u00famero de dobradi\u00e7as:\n\u00c9 necess\u00e1ria amostra \/ ensaio de n\u00e9voa salina (sim \/ n\u00e3o):<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Quando se conhece o ambiente, a porta e a carga, a classifica\u00e7\u00e3o surge por si s\u00f3. Indique a aplica\u00e7\u00e3o \u2014 interior, exterior, em ambientes sujeitos a lavagem, costeira, mar\u00edtima ou qu\u00edmica \u2014 e <a href=\"https:\/\/manufactorhinge.com\/pt\/contact-us\/\">a nossa equipa de engenharia<\/a> pode confirmar se o 304 ou o 316 \u00e9 o mais adequado e qual o modelo a utilizar.<\/p>\n\n\n\n<h2 id=\"faq\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1782700010001\"><strong class=\"schema-faq-question\">Qual \u00e9 a diferen\u00e7a entre as dobradi\u00e7as SUS 304 e SUS 316?<\/strong> <p class=\"schema-faq-answer\">Ambos s\u00e3o a\u00e7os inoxid\u00e1veis austen\u00edticos resistentes \u00e0 corros\u00e3o, mas o 316 cont\u00e9m cerca de 2-3% de molibd\u00e9nio, o que melhora significativamente a resist\u00eancia \u00e0 corros\u00e3o por pite e \u00e0 corros\u00e3o em fendas causada por cloretos. Em ambientes secos ou isentos de cloretos, apresentam um desempenho semelhante, sendo o 304 a op\u00e7\u00e3o mais econ\u00f3mica; em proximidade de sal ou produtos qu\u00edmicos, o 316 resiste onde o 304 sofre corros\u00e3o por pite.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782700010002\"><strong class=\"schema-faq-question\">Quando devo optar pelo 316 em vez do 304 para uma dobradi\u00e7a?<\/strong> <p class=\"schema-faq-answer\">Opte pelo 316 quando houver cloretos presentes \u2013 locais costeiros ou pr\u00f3ximos da costa, equipamento mar\u00edtimo e utilizado na \u00e1gua, sal utilizado em estradas ou para descongelamento, ambientes de piscinas e muitos produtos qu\u00edmicos de processo. Para utiliza\u00e7\u00f5es em ambientes interiores secos, exteriores em geral e na maioria das aplica\u00e7\u00f5es que envolvam lavagem com jato de \u00e1gua, o 304 \u00e9 suficiente e mais econ\u00f3mico.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782700010003\"><strong class=\"schema-faq-question\">O a\u00e7o inoxid\u00e1vel 316 \u00e9 sempre melhor do que o 304?<\/strong> <p class=\"schema-faq-answer\">Nem sempre \u2013 o 316 resiste melhor aos cloretos, mas \u00e9 mais caro e, em ambientes sem cloretos, o 304 tem um desempenho praticamente id\u00eantico. A escolha certa depende do ambiente: o 304 por defeito, o 316 quando h\u00e1 sal ou produtos qu\u00edmicos agressivos. Pagar pelo 316 quando o 304 seria suficiente \u00e9 um gasto excessivo, n\u00e3o uma melhoria.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782700010004\"><strong class=\"schema-faq-question\">Qual \u00e9 o tipo de a\u00e7o inoxid\u00e1vel mais adequado para dobradi\u00e7as mar\u00edtimas ou costeiras?<\/strong> <p class=\"schema-faq-answer\">316. A exposi\u00e7\u00e3o direta ao spray salino e ao ar costeiro rico em cloretos provoca corros\u00e3o por pite no 304 ao longo do tempo, especialmente nas fendas estreitas em torno do pino da dobradi\u00e7a e das folhas. O molibd\u00e9nio presente no 316 resiste a essa corros\u00e3o por pite e em fendas, tornando-o a classe padr\u00e3o para aplica\u00e7\u00f5es em dobradi\u00e7as mar\u00edtimas e costeiras.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782700010005\"><strong class=\"schema-faq-question\">As dobradi\u00e7as em a\u00e7o inoxid\u00e1vel 304 enferrujam quando expostas ao ar livre?<\/strong> <p class=\"schema-faq-answer\">As dobradi\u00e7as em a\u00e7o inoxid\u00e1vel 304 costumam ter um bom desempenho nas condi\u00e7\u00f5es meteorol\u00f3gicas exteriores em geral. Podem apresentar manchas de ferrugem ou corros\u00e3o por pite em ambientes ricos em cloreto, tais como o ar costeiro, o sal utilizado na limpeza de estradas, o ambiente das piscinas ou a lavagem com produtos qu\u00edmicos \u2014 muitas vezes, inicialmente nos orif\u00edcios dos parafusos e na zona dos pinos, onde as fendas ret\u00eam humidade.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782700010006\"><strong class=\"schema-faq-question\">As dobradi\u00e7as em a\u00e7o inoxid\u00e1vel 316 podem ainda assim sofrer corros\u00e3o?<\/strong> <p class=\"schema-faq-answer\">Sim. O a\u00e7o 316 resiste \u00e0 corros\u00e3o por pite de cloreto muito melhor do que o 304, mas pode ainda assim sofrer corros\u00e3o se a superf\u00edcie estiver contaminada ou mal acabada, se a \u00e1gua salgada ficar retida numa fenda ou se for utilizado com fixadores incompat\u00edveis numa junta h\u00famida. \u00c9 mais resistente, mas n\u00e3o \u00e9 \u00e0 prova de ferrugem.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>Choose SUS 304 stainless for general outdoor, washdown, and food-industry hinges, and step up to SUS 316 when chlorides are present \u2014 coastal sites, marine equipment, de-icing salt, and many chemical environments \u2014 because 316&#8217;s added molybdenum is what resists the pitting that 304 cannot. Both grades are corrosion-resistant stainless steels and look identical; the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3962,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_gspb_post_css":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-3961","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SUS 304 vs SUS 316 Hinges | Stainless Grade Guide - HSP Industrial Hinges<\/title>\n<meta name=\"description\" content=\"Compare SUS 304 and SUS 316 stainless steel hinges by corrosion resistance, chloride exposure, coastal and marine use, washdown, finish, and cost.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/manufactorhinge.com\/pt\/sus-304-vs-sus-316-stainless-steel-hinges\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SUS 304 vs SUS 316 Hinges | Stainless Grade Guide - HSP Industrial Hinges\" \/>\n<meta property=\"og:description\" content=\"Compare SUS 304 and SUS 316 stainless steel hinges by corrosion resistance, chloride exposure, coastal and marine use, washdown, finish, and cost.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/manufactorhinge.com\/pt\/sus-304-vs-sus-316-stainless-steel-hinges\/\" \/>\n<meta property=\"og:site_name\" content=\"HSP Industrial Hinges\" \/>\n<meta property=\"article:published_time\" content=\"2026-06-30T08:16:37+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-06-30T08:20:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1448\" \/>\n\t<meta property=\"og:image:height\" content=\"1086\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"wpdev\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"wpdev\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo estimado de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/\"},\"author\":{\"name\":\"wpdev\",\"@id\":\"https:\/\/manufactorhinge.com\/#\/schema\/person\/695e6c779112dee6d57ee26d872f68c8\"},\"headline\":\"SUS 304 vs SUS 316 Hinges | Stainless Grade Guide\",\"datePublished\":\"2026-06-30T08:16:37+00:00\",\"dateModified\":\"2026-06-30T08:20:02+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/\"},\"wordCount\":1288,\"publisher\":{\"@id\":\"https:\/\/manufactorhinge.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch.webp\",\"articleSection\":[\"Blog\"],\"inLanguage\":\"pt-PT\"},{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/\",\"url\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/\",\"name\":\"SUS 304 vs SUS 316 Hinges | Stainless Grade Guide - HSP Industrial Hinges\",\"isPartOf\":{\"@id\":\"https:\/\/manufactorhinge.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch.webp\",\"datePublished\":\"2026-06-30T08:16:37+00:00\",\"dateModified\":\"2026-06-30T08:20:02+00:00\",\"description\":\"Compare SUS 304 and SUS 316 stainless steel hinges by corrosion resistance, chloride exposure, coastal and marine use, washdown, finish, and cost.\",\"breadcrumb\":{\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#breadcrumb\"},\"mainEntity\":[{\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010001\"},{\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010002\"},{\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010003\"},{\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010004\"},{\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010005\"},{\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010006\"}],\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-PT\",\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#primaryimage\",\"url\":\"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch.webp\",\"contentUrl\":\"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch.webp\",\"width\":1448,\"height\":1086},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/manufactorhinge.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"SUS 304 vs SUS 316 Hinges | Stainless Grade Guide\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/manufactorhinge.com\/#website\",\"url\":\"https:\/\/manufactorhinge.com\/\",\"name\":\"Torque & Industrial Hinge Manufacturer\",\"description\":\"Torque &amp; Industrial Hinge Manufacturer\",\"publisher\":{\"@id\":\"https:\/\/manufactorhinge.com\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/manufactorhinge.com\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"pt-PT\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/manufactorhinge.com\/#organization\",\"name\":\"Torque & Industrial Hinge Manufacturer\",\"url\":\"https:\/\/manufactorhinge.com\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-PT\",\"@id\":\"https:\/\/manufactorhinge.com\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/03\/logo-1.webp\",\"contentUrl\":\"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/03\/logo-1.webp\",\"width\":145,\"height\":46,\"caption\":\"Torque & Industrial Hinge Manufacturer\"},\"image\":{\"@id\":\"https:\/\/manufactorhinge.com\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/manufactorhinge.com\/#\/schema\/person\/695e6c779112dee6d57ee26d872f68c8\",\"name\":\"wpdev\",\"sameAs\":[\"https:\/\/manufactorhinge.com\"],\"url\":\"https:\/\/manufactorhinge.com\/pt\/author\/wpdev\/\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010001\",\"position\":1,\"url\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010001\",\"name\":\"What is the difference between SUS 304 and SUS 316 hinges?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Both are corrosion-resistant austenitic stainless steels, but 316 adds about 2-3% molybdenum, which strongly improves resistance to pitting and crevice corrosion from chlorides. In dry or chloride-free settings they perform similarly and 304 is the lower-cost choice; near salt or chemicals, 316 lasts where 304 pits.\",\"inLanguage\":\"pt-PT\"},\"inLanguage\":\"pt-PT\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010002\",\"position\":2,\"url\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010002\",\"name\":\"When should I choose 316 instead of 304 for a hinge?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Choose 316 when chlorides are present - coastal or near-shore sites, marine and on-water equipment, road or de-icing salt, swimming-pool atmospheres, and many process chemicals. For dry indoor, general outdoor, and most washdown use, 304 is sufficient and more economical.\",\"inLanguage\":\"pt-PT\"},\"inLanguage\":\"pt-PT\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010003\",\"position\":3,\"url\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010003\",\"name\":\"Is 316 stainless always better than 304?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Not always - 316 resists chlorides better, but it costs more, and in chloride-free environments 304 performs about the same. The right choice is by environment: 304 by default, 316 where salt or aggressive chemicals are present. Paying for 316 where 304 would do is overspending, not an upgrade.\",\"inLanguage\":\"pt-PT\"},\"inLanguage\":\"pt-PT\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010004\",\"position\":4,\"url\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010004\",\"name\":\"Which stainless grade is best for marine or coastal hinges?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"316. Direct salt spray and chloride-laden coastal air pit 304 over time, especially in the tight crevices around a hinge pin and leaves. The molybdenum in 316 resists that pitting and crevice corrosion, making it the standard grade for marine and coastal hinge applications.\",\"inLanguage\":\"pt-PT\"},\"inLanguage\":\"pt-PT\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010005\",\"position\":5,\"url\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010005\",\"name\":\"Will 304 stainless hinges rust outdoors?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"304 stainless hinges usually perform well in general outdoor weather. They can show rust staining or pitting in chloride-rich environments such as coastal air, road salt, pool atmospheres, or chemical washdown - often first at the screw holes and pin area, where crevices trap moisture.\",\"inLanguage\":\"pt-PT\"},\"inLanguage\":\"pt-PT\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010006\",\"position\":6,\"url\":\"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010006\",\"name\":\"Can 316 stainless hinges still corrode?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. 316 resists chloride pitting far better than 304, but it can still corrode if the surface is contaminated or poorly finished, if saltwater stays trapped in a crevice, or if it is paired with incompatible fasteners in a wet joint. It is more resistant, not rust-proof.\",\"inLanguage\":\"pt-PT\"},\"inLanguage\":\"pt-PT\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Dobradi\u00e7as SUS 304 vs SUS 316 | Guia de tipos de a\u00e7o inoxid\u00e1vel - Dobradi\u00e7as Industriais HSP","description":"Compare as dobradi\u00e7as de a\u00e7o inoxid\u00e1vel SUS 304 e SUS 316 em termos de resist\u00eancia \u00e0 corros\u00e3o, exposi\u00e7\u00e3o ao cloreto, utiliza\u00e7\u00e3o em zonas costeiras e mar\u00edtimas, lavagem, acabamento e custo.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/manufactorhinge.com\/pt\/sus-304-vs-sus-316-stainless-steel-hinges\/","og_locale":"pt_PT","og_type":"article","og_title":"SUS 304 vs SUS 316 Hinges | Stainless Grade Guide - HSP Industrial Hinges","og_description":"Compare SUS 304 and SUS 316 stainless steel hinges by corrosion resistance, chloride exposure, coastal and marine use, washdown, finish, and cost.","og_url":"https:\/\/manufactorhinge.com\/pt\/sus-304-vs-sus-316-stainless-steel-hinges\/","og_site_name":"HSP Industrial Hinges","article_published_time":"2026-06-30T08:16:37+00:00","article_modified_time":"2026-06-30T08:20:02+00:00","og_image":[{"width":1448,"height":1086,"url":"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch.webp","type":"image\/png"}],"author":"wpdev","twitter_card":"summary_large_image","twitter_misc":{"Escrito por":"wpdev","Tempo estimado de leitura":"7 minutos"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#article","isPartOf":{"@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/"},"author":{"name":"wpdev","@id":"https:\/\/manufactorhinge.com\/#\/schema\/person\/695e6c779112dee6d57ee26d872f68c8"},"headline":"SUS 304 vs SUS 316 Hinges | Stainless Grade Guide","datePublished":"2026-06-30T08:16:37+00:00","dateModified":"2026-06-30T08:20:02+00:00","mainEntityOfPage":{"@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/"},"wordCount":1288,"publisher":{"@id":"https:\/\/manufactorhinge.com\/#organization"},"image":{"@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#primaryimage"},"thumbnailUrl":"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch.webp","articleSection":["Blog"],"inLanguage":"pt-PT"},{"@type":["WebPage","FAQPage"],"@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/","url":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/","name":"Dobradi\u00e7as SUS 304 vs SUS 316 | Guia de tipos de a\u00e7o inoxid\u00e1vel - Dobradi\u00e7as Industriais HSP","isPartOf":{"@id":"https:\/\/manufactorhinge.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#primaryimage"},"image":{"@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#primaryimage"},"thumbnailUrl":"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch.webp","datePublished":"2026-06-30T08:16:37+00:00","dateModified":"2026-06-30T08:20:02+00:00","description":"Compare as dobradi\u00e7as de a\u00e7o inoxid\u00e1vel SUS 304 e SUS 316 em termos de resist\u00eancia \u00e0 corros\u00e3o, exposi\u00e7\u00e3o ao cloreto, utiliza\u00e7\u00e3o em zonas costeiras e mar\u00edtimas, lavagem, acabamento e custo.","breadcrumb":{"@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#breadcrumb"},"mainEntity":[{"@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010001"},{"@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010002"},{"@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010003"},{"@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010004"},{"@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010005"},{"@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010006"}],"inLanguage":"pt-PT","potentialAction":[{"@type":"ReadAction","target":["https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/"]}]},{"@type":"ImageObject","inLanguage":"pt-PT","@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#primaryimage","url":"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch.webp","contentUrl":"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/06\/316-stainless-steel-hinge-boat-hatch.webp","width":1448,"height":1086},{"@type":"BreadcrumbList","@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/manufactorhinge.com\/"},{"@type":"ListItem","position":2,"name":"SUS 304 vs SUS 316 Hinges | Stainless Grade Guide"}]},{"@type":"WebSite","@id":"https:\/\/manufactorhinge.com\/#website","url":"https:\/\/manufactorhinge.com\/","name":"Fabricante de dobradi\u00e7as de torque e industriais","description":"Fabricante de dobradi\u00e7as de torque e industriais","publisher":{"@id":"https:\/\/manufactorhinge.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/manufactorhinge.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"pt-PT"},{"@type":"Organization","@id":"https:\/\/manufactorhinge.com\/#organization","name":"Fabricante de dobradi\u00e7as de torque e industriais","url":"https:\/\/manufactorhinge.com\/","logo":{"@type":"ImageObject","inLanguage":"pt-PT","@id":"https:\/\/manufactorhinge.com\/#\/schema\/logo\/image\/","url":"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/03\/logo-1.webp","contentUrl":"https:\/\/manufactorhinge.com\/wp-content\/uploads\/2026\/03\/logo-1.webp","width":145,"height":46,"caption":"Torque & Industrial Hinge Manufacturer"},"image":{"@id":"https:\/\/manufactorhinge.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/manufactorhinge.com\/#\/schema\/person\/695e6c779112dee6d57ee26d872f68c8","name":"wpdev","sameAs":["https:\/\/manufactorhinge.com"],"url":"https:\/\/manufactorhinge.com\/pt\/author\/wpdev\/"},{"@type":"Question","@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010001","position":1,"url":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010001","name":"Qual \u00e9 a diferen\u00e7a entre as dobradi\u00e7as SUS 304 e SUS 316?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Both are corrosion-resistant austenitic stainless steels, but 316 adds about 2-3% molybdenum, which strongly improves resistance to pitting and crevice corrosion from chlorides. In dry or chloride-free settings they perform similarly and 304 is the lower-cost choice; near salt or chemicals, 316 lasts where 304 pits.","inLanguage":"pt-PT"},"inLanguage":"pt-PT"},{"@type":"Question","@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010002","position":2,"url":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010002","name":"Quando devo optar pelo 316 em vez do 304 para uma dobradi\u00e7a?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Choose 316 when chlorides are present - coastal or near-shore sites, marine and on-water equipment, road or de-icing salt, swimming-pool atmospheres, and many process chemicals. For dry indoor, general outdoor, and most washdown use, 304 is sufficient and more economical.","inLanguage":"pt-PT"},"inLanguage":"pt-PT"},{"@type":"Question","@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010003","position":3,"url":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010003","name":"O a\u00e7o inoxid\u00e1vel 316 \u00e9 sempre melhor do que o 304?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Not always - 316 resists chlorides better, but it costs more, and in chloride-free environments 304 performs about the same. The right choice is by environment: 304 by default, 316 where salt or aggressive chemicals are present. Paying for 316 where 304 would do is overspending, not an upgrade.","inLanguage":"pt-PT"},"inLanguage":"pt-PT"},{"@type":"Question","@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010004","position":4,"url":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010004","name":"Qual \u00e9 o tipo de a\u00e7o inoxid\u00e1vel mais adequado para dobradi\u00e7as mar\u00edtimas ou costeiras?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"316. Direct salt spray and chloride-laden coastal air pit 304 over time, especially in the tight crevices around a hinge pin and leaves. The molybdenum in 316 resists that pitting and crevice corrosion, making it the standard grade for marine and coastal hinge applications.","inLanguage":"pt-PT"},"inLanguage":"pt-PT"},{"@type":"Question","@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010005","position":5,"url":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010005","name":"As dobradi\u00e7as em a\u00e7o inoxid\u00e1vel 304 enferrujam quando expostas ao ar livre?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"304 stainless hinges usually perform well in general outdoor weather. They can show rust staining or pitting in chloride-rich environments such as coastal air, road salt, pool atmospheres, or chemical washdown - often first at the screw holes and pin area, where crevices trap moisture.","inLanguage":"pt-PT"},"inLanguage":"pt-PT"},{"@type":"Question","@id":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010006","position":6,"url":"https:\/\/manufactorhinge.com\/sus-304-vs-sus-316-stainless-steel-hinges\/#faq-question-1782700010006","name":"As dobradi\u00e7as em a\u00e7o inoxid\u00e1vel 316 podem ainda assim sofrer corros\u00e3o?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes. 316 resists chloride pitting far better than 304, but it can still corrode if the surface is contaminated or poorly finished, if saltwater stays trapped in a crevice, or if it is paired with incompatible fasteners in a wet joint. It is more resistant, not rust-proof.","inLanguage":"pt-PT"},"inLanguage":"pt-PT"}]}},"acf":[],"_links":{"self":[{"href":"https:\/\/manufactorhinge.com\/pt\/wp-json\/wp\/v2\/posts\/3961","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/manufactorhinge.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/manufactorhinge.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/manufactorhinge.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/manufactorhinge.com\/pt\/wp-json\/wp\/v2\/comments?post=3961"}],"version-history":[{"count":1,"href":"https:\/\/manufactorhinge.com\/pt\/wp-json\/wp\/v2\/posts\/3961\/revisions"}],"predecessor-version":[{"id":3963,"href":"https:\/\/manufactorhinge.com\/pt\/wp-json\/wp\/v2\/posts\/3961\/revisions\/3963"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/manufactorhinge.com\/pt\/wp-json\/wp\/v2\/media\/3962"}],"wp:attachment":[{"href":"https:\/\/manufactorhinge.com\/pt\/wp-json\/wp\/v2\/media?parent=3961"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/manufactorhinge.com\/pt\/wp-json\/wp\/v2\/categories?post=3961"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/manufactorhinge.com\/pt\/wp-json\/wp\/v2\/tags?post=3961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}