{"id":6897,"date":"2026-08-05T09:00:00","date_gmt":"2026-08-05T01:00:00","guid":{"rendered":"https:\/\/www.onerovalve.com\/?p=6897"},"modified":"2026-09-01T09:54:12","modified_gmt":"2026-09-01T01:54:12","slug":"304-vs-316-stainless-steel-ball-valve-selection-guide","status":"publish","type":"post","link":"https:\/\/www.onerovalve.com\/pt\/blog\/comparison\/304-vs-316-stainless-steel-ball-valve-selection-guide\/","title":{"rendered":"Guia de sele\u00e7\u00e3o de v\u00e1lvulas de esfera em a\u00e7o inoxid\u00e1vel 316 vs 304"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Resposta r\u00e1pida:<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A escolha entre a\u00e7o inoxid\u00e1vel 304 ou 316 para sua v\u00e1lvula de esfera \u00e9 a decis\u00e3o mais comum em tubula\u00e7\u00f5es de processo, e uma escolha errada pode ser muito cara. Uma v\u00e1lvula de a\u00e7o inoxid\u00e1vel 304 apresentar\u00e1 corros\u00e3o e vazamentos em menos de seis meses em qualquer servi\u00e7o com presen\u00e7a de cloretos. Uma v\u00e1lvula de a\u00e7o inoxid\u00e1vel 316, especificada para uma aplica\u00e7\u00e3o equivalente \u00e0 de a\u00e7o inoxid\u00e1vel 304, custa de 20 a 30% a mais sem agregar valor t\u00e9cnico. As v\u00e1lvulas ONERO s\u00e3o fabricadas em a\u00e7o inoxid\u00e1vel 304 e 316, com di\u00e2metros de 1\/2 polegada a 48 polegadas e classes de press\u00e3o de 150 LB a 2500 LB. <a href=\"https:\/\/www.onerovalve.com\/pt\/blog\/comparison\/api-6d-vs-asme-b16-34\/\" target=\"_blank\" rel=\"noreferrer noopener\">API 6D<\/a>, Certificado pelas normas API 607 e ISO 15848.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/08\/image2-1-1200x675.webp\" alt=\"\" class=\"wp-image-6904\" srcset=\"https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/08\/image2-1-1200x675-1.webp 1200w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/08\/image2-1-300x169.webp 300w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/08\/image2-1-500x281.webp 500w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/08\/image2-1-768x432.webp 768w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/08\/image2-1-18x10.webp 18w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/08\/image2-1-1536x864.webp 1536w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/08\/image2-1-133x75.webp 133w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/08\/image2-1-480x270.webp 480w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/08\/image2-1-800x450.webp 800w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/08\/image2-1.webp 1672w\" sizes=\"auto, (max-width:767px) 480px, (max-width:1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Qual a diferen\u00e7a na composi\u00e7\u00e3o entre o a\u00e7o inoxid\u00e1vel 304 e o 316?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A diferen\u00e7a fundamental entre os a\u00e7os inoxid\u00e1veis 304 e 316 reside no molibd\u00eanio. Ambos os a\u00e7os inoxid\u00e1veis, 304 e 316, compartilham uma base austen\u00edtica de cromo-n\u00edquel, mas o 316 adiciona 2% de molibd\u00eanio ao 3%, elemento ausente no 304.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Elemento<\/strong><\/td><td><strong>304<\/strong><\/td><td><strong>316 \/ 316L<\/strong><\/td><\/tr><tr><td>Cromo<\/td><td>18 a 20%<\/td><td>16 a 18%<\/td><\/tr><tr><td>N\u00edquel<\/td><td>8 a 10,5%<\/td><td>10 a 14%<\/td><\/tr><tr><td>Molibd\u00eanio<\/td><td>Nenhum<\/td><td>2 a 3%<\/td><\/tr><tr><td>Carbono (m\u00e1x.)<\/td><td>0.08%<\/td><td>0,03% (316L)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">O &quot;L&quot; significa baixo teor de carbono 0,03% em compara\u00e7\u00e3o com o 0,08% do a\u00e7o inoxid\u00e1vel 316 padr\u00e3o. O baixo teor de carbono minimiza a precipita\u00e7\u00e3o de carbonetos nas zonas afetadas pelo calor da solda, o que se aplica quando... <a href=\"https:\/\/www.onerovalve.com\/pt\/product\/fully-welded-ball-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">As v\u00e1lvulas s\u00e3o soldadas<\/a> Em ambientes severos.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Compara\u00e7\u00e3o de resist\u00eancia \u00e0 corros\u00e3o<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">PREN: O N\u00famero Chave<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">O PREN (N\u00famero Equivalente de Resist\u00eancia \u00e0 Corros\u00e3o por Pite) do a\u00e7o inoxid\u00e1vel indica a resist\u00eancia \u00e0 corros\u00e3o por pite de cloreto. O PREN \u00e9 calculado por: PREN = %Cr + 3,3 x %Mo + 16 x %N.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O valor PREN do a\u00e7o 304 varia de 18 a 20. J\u00e1 o valor PREN do a\u00e7o 316 situa-se entre 23 e 28. A adi\u00e7\u00e3o de molibd\u00eanio \u00e9 a \u00fanica respons\u00e1vel por essa diferen\u00e7a. Quanto maior o n\u00famero PREN, melhor a resist\u00eancia da camada passiva \u00e0 falha na presen\u00e7a de \u00edons cloreto.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Por que ambientes com cloreto exigem a\u00e7o inoxid\u00e1vel 316?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00e1lvulas expostas a \u00edons cloreto em instala\u00e7\u00f5es costeiras, circuitos de refrigera\u00e7\u00e3o com \u00e1gua do mar, f\u00e1bricas de produtos qu\u00edmicos onde s\u00e3o utilizados desinfetantes clorados e plataformas offshore exigem o a\u00e7o inoxid\u00e1vel 316. Uma compara\u00e7\u00e3o entre v\u00e1lvulas de esfera de a\u00e7o inoxid\u00e1vel 316 e 304 em servi\u00e7o com \u00e1gua do mar mostra que o a\u00e7o 304 apresenta falhas em uma ou duas temporadas. O a\u00e7o 316 mant\u00e9m sua integridade durante toda a vida \u00fatil projetada da v\u00e1lvula.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O limite n\u00e3o permanece constante para a concentra\u00e7\u00e3o de cloreto. Ele varia com as mudan\u00e7as de temperatura, valor de pH e concentra\u00e7\u00e3o de oxig\u00eanio. Em geral, quando a concentra\u00e7\u00e3o de cloreto em um fluido de processo excede 200 partes por milh\u00e3o a uma temperatura superior a 60 graus Celsius, o valor deve ser de 316 ou superior.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Verifica\u00e7\u00e3o de Molibd\u00eanio<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A ONERO analisa o teor de molibd\u00eanio de cada lote de material 316 recebido por meio de seu espectr\u00f4metro de emiss\u00e3o \u00f3ptica. O teste de identifica\u00e7\u00e3o positiva de material (PMI) \u00e9 realizado na etapa de corpo da v\u00e1lvula, antes do in\u00edcio da usinagem da pe\u00e7a. Isso garante que o material 304 n\u00e3o seja recebido por engano como material 316.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Limites de temperatura e press\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">As v\u00e1lvulas de esfera em a\u00e7o inoxid\u00e1vel 304 e 316L possuem tampa.<a href=\"https:\/\/www.onerovalve.com\/pt\/product\/ultra-low-temperature-ball-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\"> <\/a>Servi\u00e7o criog\u00eanico at\u00e9 -196 graus Celsius com testes de impacto apropriados. Limites superiores de temperatura padr\u00e3o por <a href=\"https:\/\/www.onerovalve.com\/pt\/blog\/ball-valve-class-ratings-asme-api\/\" target=\"_blank\" rel=\"noreferrer noopener\">Norma ASME B16.34<\/a> A temperatura de opera\u00e7\u00e3o atinge 816 graus Celsius para ambas as classes de a\u00e7o. A diferen\u00e7a pr\u00e1tica reside no comportamento da corros\u00e3o nessas temperaturas.<a href=\"https:\/\/www.onerovalve.com\/pt\/product\/ultra-high-temperature-ball-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\"> temperaturas elevadas<\/a>.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Em servi\u00e7o com \u00e1cidos fracos acima de 150 graus Celsius, 316L vs 304 <a href=\"https:\/\/www.onerovalve.com\/pt\/blog\/hard-seat-vs-soft-seat-ball-valve-performance\/\" target=\"_blank\" rel=\"noreferrer noopener\">desempenho da v\u00e1lvula de esfera<\/a> diverge significativamente. O a\u00e7o 316L mant\u00e9m sua pel\u00edcula passiva; o a\u00e7o 304 come\u00e7a a apresentar corros\u00e3o generalizada acelerada sob as mesmas condi\u00e7\u00f5es.<\/p>\n\n\n\n<style>\n  .single-card-wrapper {\n    display: flex;\n    justify-content: center;\n    padding: 40px 5vw;\n    background-color: transparent;\n    box-sizing: border-box;\n  }\n  .single-card-wrapper .hero-card {\n    width: 100%;\n    max-width: 480px;\n    border: 1px solid #e0e0e0;\n    border-radius: 8px;\n    overflow: hidden;\n    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);\n    transition: transform 0.2s ease;\n    background: #fff;\n    display: flex;\n    flex-direction: column;\n    box-sizing: border-box;\n  }\n  .single-card-wrapper .hero-card:hover {\n    transform: translateY(-4px);\n  }\n  .single-card-wrapper .hero-card img {\n    width: 100%;\n    height: auto;\n    display: block;\n  }\n  .single-card-wrapper .hero-card-content {\n    padding: 16px;\n    flex-grow: 1;\n    display: flex;\n    flex-direction: column;\n    justify-content: space-between;\n    box-sizing: border-box;\n  }\n  .single-card-wrapper .hero-card-content .card-title {\n    font-size: 18px;\n    color: #1569AE;\n    font-weight: bold;\n    margin: 0 0 10px 0;\n  }\n  .single-card-wrapper .hero-card-content p {\n    font-size: 14px;\n    color: #333;\n    margin: 0 0 12px 0;\n    line-height: 1.4;\n  }\n  .single-card-wrapper .hero-card-content a {\n    display: inline-block;\n    padding: 8px 16px;\n    background-color: #1569AE;\n    color: #fff;\n    font-size: 13px;\n    text-decoration: none;\n    border-radius: 4px;\n    text-align: center;\n    transition: background-color 0.2s ease;\n  }\n  .single-card-wrapper .hero-card-content a:hover {\n    background-color: #125a96;\n  }\n<\/style>\n\n<div class=\"single-card-wrapper\">\n  <div class=\"hero-card\">\n    <a href=\"https:\/\/www.onerovalve.com\/pt\/product\/ultra-low-temperature-ball-valve\/\" target=\"_blank\">\n      <img decoding=\"async\" src=\"https:\/\/www.onerovalve.com\/wp-content\/uploads\/2024\/08\/Ultra-low-Temperature-Ball-Valve.webp\" alt=\"V\u00e1lvula de esfera de temperatura ultrabaixa\">\n    <\/a>\n    <div class=\"hero-card-content\">\n      <div class=\"card-title\">V\u00e1lvula de esfera de temperatura ultrabaixa<\/div>\n      <p>Opera a -196 \u00b0C. Para GNL, g\u00e1s criog\u00eanico e processos qu\u00edmicos. Faixa de 1\/2\u2033 a 48\u2033.<\/p>\n      <a href=\"https:\/\/www.onerovalve.com\/pt\/product\/ultra-low-temperature-ball-valve\/\" target=\"_blank\">Ver produto<\/a>\n    <\/div>\n  <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Soldabilidade e Usinagem<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Comportamento da solda<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o 304 pode ser facilmente soldado sob diversas condi\u00e7\u00f5es de aquecimento. Por outro lado, o a\u00e7o 316 \u00e9 menos tolerante ao aquecimento do que o 304. O superaquecimento das soldas de 316 pode levar \u00e0 corros\u00e3o intergranular, onde os carbonetos de cromo se precipitam no contorno de gr\u00e3o, deixando uma quantidade insuficiente de cromo para criar a pel\u00edcula protetora.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o 316L pode minimizar o problema, pois seu teor de carbono n\u00e3o excede 0,03%; no entanto, o controle da entrada de calor ainda \u00e9 necess\u00e1rio. As instru\u00e7\u00f5es de soldagem fornecidas pela norma ONERO para corpos de v\u00e1lvulas em a\u00e7o 316L estabelecem uma temperatura m\u00e1xima entre passes e exigem passiva\u00e7\u00e3o p\u00f3s-soldagem para componentes sens\u00edveis \u00e0 corros\u00e3o.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Diferen\u00e7a de custo e decis\u00e3o de sele\u00e7\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o inoxid\u00e1vel 304 \u00e9 a escolha preferencial para servi\u00e7os gerais de \u00e1gua, processamento de alimentos com qu\u00edmica CIP moderada, servi\u00e7o com vapor em alta temperatura at\u00e9 200 graus Celsius e servi\u00e7o com produtos qu\u00edmicos sem cloreto. Seu pre\u00e7o \u00e9 de 20 a 30% menor do que o da v\u00e1lvula 316 correspondente de dimens\u00f5es semelhantes. <a href=\"https:\/\/www.onerovalve.com\/pt\/blog\/2-piece-vs-3-piece-ball-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">classifica\u00e7\u00e3o de press\u00e3o<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o inoxid\u00e1vel 316 torna-se obrigat\u00f3rio quando o limite de cloreto do a\u00e7o inoxid\u00e1vel 304 \u00e9 ultrapassado, em ambientes com \u00e1cidos fracos e temperaturas elevadas, ou em instala\u00e7\u00f5es costeiras\/marinhas. O custo mais elevado ser\u00e1 sempre justificado pelo maior custo da substitui\u00e7\u00e3o prematura.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Por que a norma 316 continua sendo a refer\u00eancia NACE MR0175 para servi\u00e7o em ambientes \u00e1cidos?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A norma NACE MR0175 (ISO 15156) rege a sele\u00e7\u00e3o de materiais para equipamentos expostos a <a href=\"https:\/\/www.onerovalve.com\/pt\/blog\/xm-19-stainless-steel-hydrogen-valves\/\" target=\"_blank\" rel=\"noreferrer noopener\">sulfeto de hidrog\u00eanio<\/a>. Para corpos de v\u00e1lvulas, uma v\u00e1lvula de esfera em a\u00e7o inoxid\u00e1vel 316L \u00e9 o ponto de partida padr\u00e3o para qualifica\u00e7\u00e3o em servi\u00e7o com fluidos corrosivos.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para a\u00e7os inoxid\u00e1veis austen\u00edticos em servi\u00e7o com sulfeto de hidrog\u00eanio, a norma exige limites espec\u00edficos de dureza e restringe o teor de carbono. O a\u00e7o 316L atende a esses requisitos nos n\u00edveis de dureza padr\u00e3o.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o inoxid\u00e1vel 316 pode exigir verifica\u00e7\u00e3o adicional de dureza. O a\u00e7o inoxid\u00e1vel 304 n\u00e3o \u00e9 especificado para servi\u00e7o em ambientes corrosivos na maioria das especifica\u00e7\u00f5es de projetos, pois seu menor teor de n\u00edquel e a aus\u00eancia de molibd\u00eanio o tornam mais suscet\u00edvel a fissuras por tens\u00e3o induzidas por sulfeto sob certas condi\u00e7\u00f5es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A ONERO fabrica v\u00e1lvulas em a\u00e7o inoxid\u00e1vel 316L em total conformidade com a norma NACE MR0175, com testes de dureza e certifica\u00e7\u00e3o de materiais inclu\u00eddos no pacote de documenta\u00e7\u00e3o padr\u00e3o para pedidos de servi\u00e7os em ambientes corrosivos.<\/p>\n\n\n\n<style>\n  .single-card-wrapper {\n    display: flex;\n    justify-content: center;\n    padding: 40px 5vw;\n    background-color: transparent;\n    box-sizing: border-box;\n  }\n  .single-card-wrapper .hero-card {\n    width: 100%;\n    max-width: 480px;\n    border: 1px solid #e0e0e0;\n    border-radius: 8px;\n    overflow: hidden;\n    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);\n    transition: transform 0.2s ease;\n    background: #fff;\n    display: flex;\n    flex-direction: column;\n    box-sizing: border-box;\n  }\n  .single-card-wrapper .hero-card:hover {\n    transform: translateY(-4px);\n  }\n  .single-card-wrapper .hero-card img {\n    width: 100%;\n    height: auto;\n    display: block;\n  }\n  .single-card-wrapper .hero-card-content {\n    padding: 16px;\n    flex-grow: 1;\n    display: flex;\n    flex-direction: column;\n    justify-content: space-between;\n    box-sizing: border-box;\n  }\n  .single-card-wrapper .hero-card-content .card-title {\n    font-size: 18px;\n    color: #1569AE;\n    font-weight: bold;\n    margin: 0 0 10px 0;\n  }\n  .single-card-wrapper .hero-card-content p {\n    font-size: 14px;\n    color: #333;\n    margin: 0 0 12px 0;\n    line-height: 1.4;\n  }\n  .single-card-wrapper .hero-card-content a {\n    display: inline-block;\n    padding: 8px 16px;\n    background-color: #1569AE;\n    color: #fff;\n    font-size: 13px;\n    text-decoration: none;\n    border-radius: 4px;\n    text-align: center;\n    transition: background-color 0.2s ease;\n  }\n  .single-card-wrapper .hero-card-content a:hover {\n    background-color: #125a96;\n  }\n<\/style>\n\n<div class=\"single-card-wrapper\">\n  <div class=\"hero-card\">\n    <a href=\"https:\/\/www.onerovalve.com\/pt\/product\/trunnion-ball-valve\/\" target=\"_blank\">\n      <img decoding=\"async\" src=\"https:\/\/www.onerovalve.com\/wp-content\/uploads\/2024\/08\/Web-1920-%E2%80%93-9.jpg\" alt=\"V\u00e1lvula de esfera munh\u00e3o\">\n    <\/a>\n    <div class=\"hero-card-content\">\n      <div class=\"card-title\">V\u00e1lvula de esfera munh\u00e3o<\/div>\n      <p>Abrange 2\u2033\u201348\u2033, -196\u00b0C a 350\u00b0C, multitransmiss\u00e3o, \u00f3leo, g\u00e1s, \u00e1cidos.<\/p>\n      <a href=\"https:\/\/www.onerovalve.com\/pt\/product\/trunnion-ball-valve\/\" target=\"_blank\">Ver produto<\/a>\n    <\/div>\n  <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Especifica\u00e7\u00f5es da v\u00e1lvula de esfera ONERO nos a\u00e7os 316 e 304<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">316 e 304 do ONERO <a href=\"https:\/\/www.onerovalve.com\/pt\/blog\/ball-valve-specifications\/\" target=\"_blank\" rel=\"noreferrer noopener\">v\u00e1lvula de esfera<\/a> A gama de produtos inclui:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tamanho: 1\/2 polegada a 48 polegadas<\/li>\n\n\n\n<li>Classe de press\u00e3o: 150 lb a 2500 lb<\/li>\n\n\n\n<li>Padr\u00f5es de projeto: API 6D, API 607, BS 5351, EN ISO 17292<\/li>\n\n\n\n<li>Certifica\u00e7\u00f5es: API 6D, API 607, ISO 15848, NACE MR0175, CE<\/li>\n\n\n\n<li>Verifica\u00e7\u00e3o de materiais: An\u00e1lise PMI e espectrom\u00e9trica em todo o material 316.<\/li>\n\n\n\n<li>Testes: Hidrost\u00e1tico, estanqueidade da sede, emiss\u00e3o fugitiva conforme norma aplic\u00e1vel<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A rastreabilidade completa do material, desde o certificado de f\u00e1brica at\u00e9 a v\u00e1lvula acabada, \u00e9 padr\u00e3o em todos os pedidos. Inspe\u00e7\u00f5es de terceiros, como as realizadas pela Bureau Veritas, SGS ou por uma ag\u00eancia indicada pelo comprador, est\u00e3o dispon\u00edveis. Entre em contato com nossa equipe t\u00e9cnica para esclarecer d\u00favidas sobre especifica\u00e7\u00f5es e certifica\u00e7\u00f5es.<\/p>\n\n\n\n<style>\n    \/* \u6837\u5f0f\u9694\u79bb\uff1a\u9632\u6b62\u5f71\u54cd\u6574\u7ad9\u5176\u4ed6\u5143\u7d20 *\/\n    .valve-nav-banner {\n        position: relative;\n        width: 100%;\n        max-width: 900px;\n        min-height: 280px;\n        margin: 40px auto;\n        border-radius: 12px;\n        overflow: hidden;\n        display: flex;\n        flex-direction: column;\n        align-items: center;\n        justify-content: center;\n        text-align: center;\n        padding: 40px 20px;\n        box-sizing: border-box;\n        font-family: 'Poppins', Arial, sans-serif;\n        background-image: url('https:\/\/onerovalve.b-cdn.net\/wp-content\/uploads\/2024\/08\/banner-2.jpg');\n        background-size: cover;\n        background-position: center;\n    }\n\n    \/* \u9ed1\u8272\u534a\u900f\u660e\u906e\u7f69\u5c42\uff0c\u786e\u4fdd\u767d\u8272\u6587\u5b57\u5728\u590d\u6742\u80cc\u666f\u56fe\u4e0a\u4f9d\u7136\u6e05\u6670\u53ef\u8bfb *\/\n    .valve-nav-banner::before {\n        content: '';\n        position: absolute;\n        top: 0;\n        left: 0;\n        width: 100%;\n        height: 100%;\n        background: rgba(0, 0, 0, 0.55); \n        z-index: 1;\n    }\n\n    .valve-nav-content {\n        position: relative;\n        z-index: 2;\n        max-width: 750px;\n    }\n\n    \/* \u52a0\u7c97\u7684\u6807\u9898\u6837\u5f0f *\/\n    .valve-nav-title {\n        color: #ffffff;\n        font-size: 26px;\n        line-height: 1.4;\n        margin: 0 0 25px 0;\n    }\n\n    \/* CTA \u6309\u94ae\u6837\u5f0f\uff1a\u5df2\u9002\u914d Onero Valve \u54c1\u724c\u4e13\u5c5e\u84dd #1569AE *\/\n    .valve-cta-btn {\n        display: inline-block;\n        background-color: #1569AE;\n        color: #ffffff !important;\n        font-size: 16px;\n        font-weight: 600;\n        text-decoration: none !important;\n        padding: 14px 36px;\n        border-radius: 6px;\n        transition: all 0.3s ease;\n        border: 2px solid #1569AE;\n    }\n\n    \/* \u4ea4\u4e92\u8272\uff1a\u60ac\u505c\u65f6\u80cc\u666f\u53d8\u767d\uff0c\u6587\u5b57\u53d8\u4e3b\u9898\u8272 *\/\n    .valve-cta-btn:hover {\n        background-color: #ffffff;\n        color: #1569AE !important;\n        border-color: #ffffff;\n    }\n\n    @media (max-width: 600px) {\n        .valve-nav-title {\n            font-size: 20px;\n        }\n        .valve-nav-banner {\n            min-height: 220px;\n        }\n    }\n<\/style>\n\n<div class=\"valve-nav-banner\">\n    <div class=\"valve-nav-content\">\n        <p class=\"valve-nav-title\"><strong>V\u00e1lvulas industriais de alto desempenho. Explore nossa linha completa de produtos.<\/strong><\/p>\n        <a href=\"https:\/\/www.onerovalve.com\/pt\/products\/\" target=\"_blank\" class=\"valve-cta-btn\">Veja todos os produtos<\/a>\n    <\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Quick Answer: Choosing either 304 or 316 stainless steel for your ball valve is the most common material decision you make in process piping, and making<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":6904,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66],"tags":[],"class_list":["post-6897","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-comparison"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>304 vs 316 Stainless Steel Ball Valve: Prevent Leakage | ONERO<\/title>\n<meta name=\"description\" content=\"Avoid costly valve pitting and early failure in chloride and acid environments. Learn when to specify 316 over 304 stainless steel ball valves.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.onerovalve.com\/pt\/blog\/comparison\/304-vs-316-stainless-steel-ball-valve-selection-guide\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"304 vs 316 Stainless Steel Ball Valve: Prevent Leakage | ONERO\" \/>\n<meta property=\"og:description\" content=\"Avoid costly valve pitting and early failure in chloride and acid environments. Learn when to specify 316 over 304 stainless steel ball valves.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.onerovalve.com\/pt\/blog\/comparison\/304-vs-316-stainless-steel-ball-valve-selection-guide\/\" \/>\n<meta property=\"og:site_name\" content=\"Professional ball valve manufacturer\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-05T01:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-01T01:54:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/08\/image2-1.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1672\" \/>\n\t<meta property=\"og:image:height\" content=\"941\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"ouqiuadmin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"ouqiuadmin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.onerovalve.com\\\/blog\\\/comparison\\\/304-vs-316-stainless-steel-ball-valve-selection-guide\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.onerovalve.com\\\/blog\\\/comparison\\\/304-vs-316-stainless-steel-ball-valve-selection-guide\\\/\"},\"author\":{\"name\":\"ouqiuadmin\",\"@id\":\"https:\\\/\\\/www.onerovalve.com\\\/#\\\/schema\\\/person\\\/d8a543fd1c3677e64304f7884e7d6cb6\"},\"headline\":\"Stainless Steel Ball Valve 316 vs 304 Selection Guide\",\"datePublished\":\"2026-08-05T01:00:00+00:00\",\"dateModified\":\"2026-09-01T01:54:12+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.onerovalve.com\\\/blog\\\/comparison\\\/304-vs-316-stainless-steel-ball-valve-selection-guide\\\/\"},\"wordCount\":912,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.onerovalve.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.onerovalve.com\\\/blog\\\/comparison\\\/304-vs-316-stainless-steel-ball-valve-selection-guide\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.onerovalve.com\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/image2-1.webp\",\"articleSection\":[\"comparison\"],\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.onerovalve.com\\\/blog\\\/comparison\\\/304-vs-316-stainless-steel-ball-valve-selection-guide\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.onerovalve.com\\\/blog\\\/comparison\\\/304-vs-316-stainless-steel-ball-valve-selection-guide\\\/\",\"url\":\"https:\\\/\\\/www.onerovalve.com\\\/blog\\\/comparison\\\/304-vs-316-stainless-steel-ball-valve-selection-guide\\\/\",\"name\":\"304 vs 316 Stainless Steel Ball Valve: Prevent Leakage | ONERO\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.onerovalve.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.onerovalve.com\\\/blog\\\/comparison\\\/304-vs-316-stainless-steel-ball-valve-selection-guide\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.onerovalve.com\\\/blog\\\/comparison\\\/304-vs-316-stainless-steel-ball-valve-selection-guide\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.onerovalve.com\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/image2-1.webp\",\"datePublished\":\"2026-08-05T01:00:00+00:00\",\"dateModified\":\"2026-09-01T01:54:12+00:00\",\"description\":\"Avoid costly valve pitting and early failure in chloride and acid environments. 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