{"id":5261,"date":"2019-09-16T06:16:02","date_gmt":"2019-09-16T06:16:02","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=5261"},"modified":"2025-06-30T08:12:36","modified_gmt":"2025-06-30T08:12:36","slug":"caracteristicas-de-desempenho-do-tubo-de-aco-inoxidavel-duplex","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/pt\/blog\/caracteristicas-de-desempenho-do-tubo-de-aco-inoxidavel-duplex\/","title":{"rendered":"Caracter\u00edsticas de desempenho de tubo de a\u00e7o inoxid\u00e1vel duplex"},"content":{"rendered":"

Tubo Duplex<\/a> \u00e9 suportado por a\u00e7o inoxid\u00e1vel duplex, portanto, possui a\u00e7o inoxid\u00e1vel duplex.<\/h2>\n

O a\u00e7o inoxid\u00e1vel duplex tem as seguintes caracter\u00edsticas de desempenho:<\/strong>
\n(1) O a\u00e7o inoxid\u00e1vel duplex contendo molibd\u00eanio tem boa resist\u00eancia \u00e0 corros\u00e3o sob tens\u00e3o por cloreto sob baixa tens\u00e3o. Em geral, o a\u00e7o inoxid\u00e1vel austen\u00edtico do tipo 18-8 \u00e9 propenso a rachaduras por corros\u00e3o sob tens\u00e3o<\/a> em solu\u00e7\u00e3o de cloreto neutro acima de 60 \u00b0C, e trocadores de calor, evaporadores etc. feitos desse a\u00e7o inoxid\u00e1vel em meio industrial com tra\u00e7os de cloreto e sulfeto de hidrog\u00eanio. H\u00e1 uma tend\u00eancia de produzir rachaduras por corros\u00e3o sob tens\u00e3o, enquanto o a\u00e7o inoxid\u00e1vel duplex tem boa resist\u00eancia.<\/p>\n

(2) O a\u00e7o inoxid\u00e1vel duplex contendo molibd\u00eanio tem boa resist\u00eancia a corros\u00e3o. O potencial de corros\u00e3o duplex do a\u00e7o inoxid\u00e1vel duplex \u00e9 semelhante ao do a\u00e7o inoxid\u00e1vel austen\u00edtico quando tem o mesmo valor equivalente de resist\u00eancia \u00e0 corros\u00e3o (PRE = Cr% + 3,3Mo% + 16N%). A resist\u00eancia \u00e0 corros\u00e3o por pite do a\u00e7o inoxid\u00e1vel duplex e do a\u00e7o inoxid\u00e1vel austen\u00edtico \u00e9 compar\u00e1vel \u00e0 do AISI 316L. A resist\u00eancia \u00e0 corros\u00e3o por pite e fenda dos a\u00e7os inoxid\u00e1veis duplex de alto cromo contendo 25% Cr, especialmente contendo nitrog\u00eanio, excede a do AISI 316L.<\/p>\n

(3) Possui boa resist\u00eancia \u00e0 corros\u00e3o e fadiga ao desgaste. \u00c9 adequado para fabricar equipamentos de energia, como bombas e v\u00e1lvulas, sob certas condi\u00e7\u00f5es de meio corrosivo.<\/p>\n

(4) As propriedades mec\u00e2nicas abrangentes s\u00e3o boas. Possui alta resist\u00eancia e resist\u00eancia \u00e0 fadiga, e sua resist\u00eancia ao escoamento \u00e9 duas vezes maior que a do a\u00e7o inoxid\u00e1vel austen\u00edtico 18-8. O alongamento no estado de solu\u00e7\u00e3o s\u00f3lida \u00e9 25% e o valor de tenacidade AK (entalhe em V) est\u00e1 acima de 100J.<\/p>\n

(5) Boa soldabilidade, baixa tend\u00eancia a trincas t\u00e9rmicas, geralmente sem pr\u00e9-aquecimento antes da soldagem, sem tratamento t\u00e9rmico ap\u00f3s a soldagem e pode ser soldado com a\u00e7o inoxid\u00e1vel austen\u00edtico tipo 18-8 ou a\u00e7o carbono.<\/p>\n

(6) A temperatura de processamento duplex do a\u00e7o inoxid\u00e1vel duplex contendo baixo cromo (18%Cr) \u00e9 mais ampla do que a do a\u00e7o inoxid\u00e1vel austen\u00edtico 18-8 e a resist\u00eancia \u00e9 pequena, e a folha de a\u00e7o pode ser laminada diretamente e laminada sem forjamento. O processamento a quente do a\u00e7o inoxid\u00e1vel duplex contendo alto cromo (25% Cr) \u00e9 um pouco mais dif\u00edcil do que o a\u00e7o inoxid\u00e1vel austen\u00edtico, podendo produzir produtos como placas, tubos e fios.<\/p>\n

(7) Comparado com o a\u00e7o inoxid\u00e1vel austen\u00edtico do tipo 18-8, o efeito de endurecimento por trabalho \u00e9 maior no trabalho a frio. Quando o tubo e a placa est\u00e3o sujeitos \u00e0 deforma\u00e7\u00e3o, \u00e9 necess\u00e1ria uma grande tens\u00e3o para deformar.<\/p>\n

(8) Comparado com o a\u00e7o inoxid\u00e1vel austen\u00edtico, possui uma grande condutividade t\u00e9rmica e um pequeno coeficiente de expans\u00e3o linear, sendo adequado para uso como revestimento de equipamentos e para a produ\u00e7\u00e3o de pain\u00e9is compostos. Tamb\u00e9m adequado para fazer matrizes de trocador de calor, a efici\u00eancia de transfer\u00eancia de calor \u00e9 maior do que o a\u00e7o inoxid\u00e1vel austen\u00edtico.<\/p>\n

(9) Existem ainda v\u00e1rias tend\u00eancias \u00e0 fragilidade do a\u00e7o inoxid\u00e1vel ferr\u00edtico com alto teor de cromo, que n\u00e3o devem ser usados em condi\u00e7\u00f5es de trabalho acima de 300 \u00b0 C. Quanto menor o teor de cromo no a\u00e7o inoxid\u00e1vel duplex, menos prejudicial \u00e9 a fase fr\u00e1gil, como \u03c3.<\/p>","protected":false},"featured_media":5095,"template":"","categories":[186],"tags":[],"class_list":["post-5261","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"\nPerformance Characteristics Of Duplex Stainless Steel Pipe - Stainless Steel Pipe and Fittings | KAYSUNS<\/title>\n<meta name=\"description\" content=\"Duplex stainless steel is supported by duplex stainless steel, so it features duplex stainless steel.\" \/>\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.kaysuns.com\/pt\/blog\/caracteristicas-de-desempenho-do-tubo-de-aco-inoxidavel-duplex\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Performance Characteristics Of Duplex Stainless Steel Pipe - 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