{"id":6039,"date":"2020-06-05T07:01:40","date_gmt":"2020-06-05T07:01:40","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6039"},"modified":"2025-12-25T03:57:00","modified_gmt":"2025-12-25T03:57:00","slug":"o-que-e-aco-inoxidavel-super-duplex","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/pt\/blog\/o-que-e-aco-inoxidavel-super-duplex\/","title":{"rendered":"O que \u00e9 o a\u00e7o inoxid\u00e1vel Super Duplex?"},"content":{"rendered":"<p>O a\u00e7o inoxid\u00e1vel superduplex refere-se ao a\u00e7o duplex com PREN&gt;40, contendo 25% Cr e alto teor de <a href=\"https:\/\/www.kaysuns.com\/pt\/papel-do-molibdenio-em-tubos-e-conexoes-de-aco-inoxidavel\/\" target=\"_blank\">molibd\u00eanio<\/a> (&gt;3,5%), alto nitrog\u00eanio (0,22%~0,30%), as principais classes s\u00e3o UNS S32550 (UR52N+), <a href=\"https:\/\/www.kaysuns.com\/pt\/o-que-e-o-aco-inoxidavel-2507-super-duplex\/\" target=\"_blank\">S32750 (SAF 2507)<\/a> E o S32760 (Zeron 100) foi desenvolvido por empresas como a francesa CLI, a sueca SANDVIK e a brit\u00e2nica MATER + PLATT.<\/p>\n\n\n\n<p>Seus materiais deformados foram lan\u00e7ados por volta de 1990 e 1991 e entraram no mercado nos \u00faltimos anos. A composi\u00e7\u00e3o desses tr\u00eas a\u00e7os \u00e9 semelhante, a diferen\u00e7a \u00e9 o teor de tungst\u00eanio e cobre.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"658\" height=\"548\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/06\/duplex-seamless-pipes.jpg\" alt=\"Tubos sem costura UNS S32750\" class=\"wp-image-6041\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/06\/duplex-seamless-pipes.jpg 658w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/06\/duplex-seamless-pipes-300x250.jpg 300w\" sizes=\"(max-width: 658px) 100vw, 658px\" \/><\/figure>\n\n\n\n<p>Desde o in\u00edcio de 2000, o desenvolvimento do moderno a\u00e7o inoxid\u00e1vel duplex mostrou duas tend\u00eancias principais:<\/p>\n\n\n\n<p>Em primeiro lugar, prestando aten\u00e7\u00e3o \u00e0 estabilidade t\u00e9rmica da estrutura do a\u00e7o, aumente ainda mais o teor de cromo, molibd\u00eanio e nitrog\u00eanio no a\u00e7o para obter maior resist\u00eancia e melhor resist\u00eancia \u00e0 corros\u00e3o, para atender \u00e0s necessidades do desenvolvimento industrial moderno e facilitar o competi\u00e7\u00e3o entre os a\u00e7os inoxid\u00e1veis \u200b\u200bausten\u00edticos e o surgimento de a\u00e7os inoxid\u00e1veis \u200b\u200bsuperduplex com valores PRE pr\u00f3ximos a 50, como o SAF 2707 HD e o SAF 3207 HD.<\/p>\n\n\n\n<p>A segunda \u00e9 voltar-se para o desenvolvimento de a\u00e7o inoxid\u00e1vel duplex econ\u00f4mico com baixo teor de n\u00edquel e nenhum elemento precioso molibd\u00eanio ou apenas uma pequena quantidade de molibd\u00eanio para reduzir o custo de produ\u00e7\u00e3o e o pre\u00e7o de venda do a\u00e7o inoxid\u00e1vel duplex e melhorar a trabalhabilidade a quente e soldabilidade do duplex a\u00e7o inoxid\u00e1vel. Isso aumentar\u00e1 a competitividade do a\u00e7o inoxid\u00e1vel duplex e outros tipos de a\u00e7o inoxid\u00e1vel de uso geral, especialmente os a\u00e7os inoxid\u00e1veis austen\u00edticos 304 e 316 cromo-n\u00edquel.<\/p>\n\n\n\n<p>J\u00e1 existem SAF 2304 e AL 2003, LDX2101, Armo Nitronic 19D, ATI 2102, 2201, 2202, LDX2404 anteriores e outras marcas que s\u00f3 est\u00e3o dispon\u00edveis desde 2000. A produ\u00e7\u00e3o em massa e aplica\u00e7\u00e3o de a\u00e7o inoxid\u00e1vel duplex econ\u00f4mico trouxe um impacto tremendo sobre a sobreviv\u00eancia e o desenvolvimento da primeira gera\u00e7\u00e3o do tipo 18Cr (contendo cerca de 3% molibd\u00eanio) de a\u00e7o inoxid\u00e1vel duplex 3RE60.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p><strong>Qual classe \u00e9 mais comumente usada?<\/strong><\/p>\n\n\n\n<p>Atualmente, os principais tipos de a\u00e7o inoxid\u00e1vel super duplex na China s\u00e3o 2507 (S32750) e 2507 (UNS S32750) a\u00e7o inoxid\u00e1vel duplex, que tem forte resist\u00eancia e resist\u00eancia \u00e0 corros\u00e3o e \u00e9 usado principalmente em processamento qu\u00edmico, ind\u00fastria petroqu\u00edmica e equipamentos submarinos.<\/p>\n\n\n\n<p>Eles t\u00eam forte resist\u00eancia \u00e0 corros\u00e3o por cloreto, maior condutividade t\u00e9rmica e menor coeficiente de expans\u00e3o t\u00e9rmica. Com maior teor de cromo, molibd\u00eanio e nitrog\u00eanio, tem alta resist\u00eancia \u00e0 corros\u00e3o por pite, corros\u00e3o em fendas e corros\u00e3o geral.<\/p>\n\n\n\n<p>A resist\u00eancia ao impacto tamb\u00e9m \u00e9 muito alta, a liga 2507 n\u00e3o \u00e9 adequada para uso em um ambiente de temperatura superior a 570 \u2103, a exposi\u00e7\u00e3o a longo prazo a tal ambiente, sua resist\u00eancia ser\u00e1 reduzida.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p><strong>Aplica\u00e7\u00f5es<\/strong><\/p>\n\n\n\n<p>Normalmente usado em ambientes qu\u00edmicos especiais, como plataformas de petr\u00f3leo offshore (tubos de trocador de calor, sistemas de tratamento e abastecimento de \u00e1gua, sistemas de prote\u00e7\u00e3o contra inc\u00eandio, sistemas de sprinklers, sistemas de estabiliza\u00e7\u00e3o de \u00e1gua), equipamentos de dessaliniza\u00e7\u00e3o (dessaliniza\u00e7\u00e3o) (tubos de alta press\u00e3o em equipamentos Ro, tubos de \u00e1gua do mar ), etc. No dispositivo. Nome S32750, SAF2507, F53, padr\u00e3o nacional 00Cr25Ni7Mo4N.<\/p>\n\n\n\n<p>\u00c1reas de aplica\u00e7\u00e3o: equipamentos para a ind\u00fastria de petr\u00f3leo e g\u00e1s; plataformas offshore, trocadores de calor, equipamentos subaqu\u00e1ticos, equipamentos de combate a inc\u00eandios; ind\u00fastria de processamento qu\u00edmico, utens\u00edlios e ind\u00fastria de dutos; usinas de dessaliniza\u00e7\u00e3o, dutos submarinos; componentes mec\u00e2nicos (componentes de alta resist\u00eancia e resistentes \u00e0 corros\u00e3o), sistema FGD da ind\u00fastria de energia, sistema de lavagem industrial, torre de absor\u00e7\u00e3o, etc.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Talvez voc\u00ea tamb\u00e9m queira ler:<br \/><a href=\"https:\/\/www.kaysuns.com\/pt\/problemas-comuns-do-super-duplex-durante-o-uso\/\" target=\"_blank\">Problemas comuns do Super Duplex durante o uso<\/a><\/p>","protected":false},"featured_media":6041,"template":"","categories":[186],"tags":[],"class_list":["post-6039","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What Is Super Duplex Stainless Steel? 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