{"id":710,"date":"2025-06-17T07:34:51","date_gmt":"2025-06-17T07:34:51","guid":{"rendered":"https:\/\/dura-alloy.com\/?post_type=product&p=710"},"modified":"2025-06-17T07:34:51","modified_gmt":"2025-06-17T07:34:51","slug":"gh825","status":"publish","type":"product","link":"https:\/\/www.dura-alloy.com\/pt\/produto\/gh825\/","title":{"rendered":"GH825"},"content":{"rendered":"

\u00c2mbito de fornecimento para o Aviation Group<\/span><\/strong><\/p>\n

Forjados, var\u00f5es redondos, chapas de a\u00e7o, an\u00e9is, tubos sem costura, chapas de a\u00e7o\/cintas de a\u00e7o, materiais de soldadura de arame, bem-vindo ao inqu\u00e9rito!<\/span><\/strong><\/p>\n

1. Introdu\u00e7\u00e3o ao\u00a0<\/span><\/strong>GH825\u00a0<\/span><\/strong>materiais<\/span><\/strong><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0O GH825 \u00e9 uma liga de n\u00edquel-ferro-cr\u00f3mio totalmente austen\u00edtica com estabiliza\u00e7\u00e3o de tit\u00e2nio, sendo adicionados cobre e molibd\u00e9nio. O GH825 \u00e9 uma liga de engenharia universal com propriedades anti-corros\u00e3o de metais \u00e1cidos e alcalinos, tanto em ambientes de oxida\u00e7\u00e3o como de redu\u00e7\u00e3o.<\/span><\/p>\n

O elevado teor de n\u00edquel torna a liga eficaz na resist\u00eancia \u00e0 fissura\u00e7\u00e3o por corros\u00e3o sob tens\u00e3o. A resist\u00eancia \u00e0 corros\u00e3o \u00e9 boa em v\u00e1rios meios, como \u00e1cido sulf\u00farico, \u00e1cido fosf\u00f3rico, \u00e1cido n\u00edtrico e \u00e1cidos org\u00e2nicos, metais alcalinos como hidr\u00f3xido de s\u00f3dio, hidr\u00f3xido de pot\u00e1ssio e solu\u00e7\u00f5es de \u00e1cido clor\u00eddrico. O elevado desempenho global do GH825 reflecte-se nos dissolventes de combust\u00e3o nuclear com v\u00e1rios meios corrosivos, como o \u00e1cido sulf\u00farico, o \u00e1cido n\u00edtrico e o hidr\u00f3xido de s\u00f3dio, todos processados no mesmo equipamento.<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0Devido ao facto de a liga GH825 ser rica em Cr, Mo e Cu, tem uma boa resist\u00eancia \u00e0 corros\u00e3o abrangente a \u00e1cidos oxidantes e n\u00e3o oxidantes. Especialmente tem uma resist\u00eancia extremamente elevada \u00e0 corros\u00e3o do \u00e1cido sulf\u00farico. Devido ao elevado teor de Cr, Mo e Ni, tem uma excelente resist\u00eancia \u00e0 corros\u00e3o em po\u00e7os, \u00e0 corros\u00e3o em fendas, \u00e0 corros\u00e3o sob tens\u00e3o e \u00e0 fissura\u00e7\u00e3o em ambiente de cloreto. A liga GH825825 controla o teor de carbono a um n\u00edvel extremamente baixo, n\u00e3o \u00e9 f\u00e1cil de sensibilizar durante a soldadura e tem baixa sensibilidade \u00e0 corros\u00e3o intergranular.<\/span><\/p>\n

2.\u00a0<\/span><\/strong>Composi\u00e7\u00e3o qu\u00edmica de\u00a0<\/strong><\/span>GH825<\/span><\/strong><\/p>\n\n\n\n\n\n
liga<\/span><\/td>\n%<\/td>\nn\u00edquel<\/span><\/td>\ncr\u00f3mio<\/span><\/td>\nferro<\/span><\/td>\ncarbono<\/span><\/td>\nmangan\u00eas<\/span><\/td>\nsil\u00edcio<\/span><\/td>\ncobre<\/span><\/td>\nmolibd\u00e9nio<\/span><\/td>\nalum\u00ednio<\/span><\/td>\ntit\u00e2nio<\/span><\/td>\nf\u00f3sforo<\/span><\/td>\nenxofre<\/span><\/td>\n<\/tr>\n
GH825<\/td>\nM\u00ednimo<\/span><\/td>\n38<\/td>\n19.5<\/td>\nmargem<\/span><\/td>\n–<\/td>\n–<\/span><\/td>\n–<\/span><\/td>\n1.5<\/td>\n2.5<\/td>\n–<\/span><\/td>\n0.6<\/td>\n–<\/span><\/td>\n–<\/span><\/td>\n<\/tr>\n
m\u00e1ximo<\/span><\/td>\n46<\/td>\n23.5<\/td>\n0.025<\/td>\n1.0<\/td>\n0.5<\/td>\n3.0<\/td>\n3.5<\/td>\n0.2<\/td>\n1.2<\/td>\n0.02<\/td>\n0.01<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

3.\u00a0<\/span><\/strong>GH825\u00a0<\/span><\/strong>propriedades f\u00edsicas<\/span><\/strong><\/p>\n\n\n\n\n
densidade<\/span><\/td>\n8,14 G \/ CM3<\/span><\/td>\n<\/tr>\n
Ponto de fus\u00e3o<\/span><\/td>\n1370-1400 \u2103<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Valor m\u00ednimo das propriedades mec\u00e2nicas da liga GH825 \u00e0 temperatura ambiente:<\/span><\/p>\n\n\n\n\n
Estado<\/span><\/td>\nResist\u00eancia \u00e0 tra\u00e7\u00e3o Rm N\/mm<\/span><\/td>\nResist\u00eancia ao escoamento RP0,2 N\/mm<\/span><\/td>\nAlongamento A5 %<\/span><\/td>\nDureza Brinell HB<\/span><\/td>\n<\/tr>\n
Estado de fus\u00e3o s\u00f3lido<\/span><\/td>\n550<\/td>\n220<\/td>\n30<\/td>\n\u2264200<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

4.\u00a0<\/span><\/strong>GH825\u00a0<\/span><\/strong>A liga tem as seguintes carater\u00edsticas:<\/span><\/strong><\/p>\n

    \n
  • Boa resist\u00eancia \u00e0 fissura\u00e7\u00e3o por corros\u00e3o sob tens\u00e3o<\/span><\/li>\n
  • Boa resist\u00eancia \u00e0 corros\u00e3o por picadas e fendas<\/span><\/li>\n
  • Muito boas propriedades antioxidantes e \u00e1cido t\u00e9rmico n\u00e3o-oxidante<\/span><\/li>\n
  • Possui boas propriedades mec\u00e2nicas \u00e0 temperatura ambiente e a temperaturas elevadas at\u00e9 550\u00b0C<\/span><\/li>\n
  • Certifica\u00e7\u00e3o para o fabrico de recipientes sob press\u00e3o com temperaturas at\u00e9 450\u00b0C<\/span><\/li>\n<\/ul>\n

    V.\u00a0<\/span><\/strong>Resist\u00eancia \u00e0 corros\u00e3o da liga GH825<\/span><\/strong><\/p>\n

    A liga 825 \u00e9 uma liga de engenharia geral com resist\u00eancia \u00e0 corros\u00e3o de metais \u00e1cidos e alcalinos em ambientes de oxida\u00e7\u00e3o e redu\u00e7\u00e3o. O elevado teor de n\u00edquel faz com que a liga resista eficazmente \u00e0 fissura\u00e7\u00e3o por corros\u00e3o sob tens\u00e3o. A resist\u00eancia \u00e0 corros\u00e3o \u00e9 boa em v\u00e1rios meios, como \u00e1cido sulf\u00farico, \u00e1cido fosf\u00f3rico, \u00e1cido n\u00edtrico e \u00e1cidos org\u00e2nicos, metais alcalinos como hidr\u00f3xido de s\u00f3dio, hidr\u00f3xido de pot\u00e1ssio e solu\u00e7\u00f5es de \u00e1cido clor\u00eddrico. O elevado desempenho global da liga 825 reflecte-se nos dissolventes de combust\u00e3o nuclear com v\u00e1rios meios corrosivos, como o \u00e1cido sulf\u00farico, o \u00e1cido n\u00edtrico e o hidr\u00f3xido de s\u00f3dio, todos processados no mesmo equipamento.<\/span><\/p>\n

    6. G\u00a0<\/span><\/strong>H825\u00a0<\/span><\/strong>campos de aplica\u00e7\u00e3o<\/span><\/strong><\/p>\n

    A liga GH825 \u00e9 amplamente utilizada em v\u00e1rios campos industriais onde a temperatura n\u00e3o \u00e9 superior a 550 \u2103.<\/span><\/p>\n

      \n
    • Tubos de aquecimento, recipientes, cestos e correntes para f\u00e1bricas de decapagem de \u00e1cido sulf\u00farico,<\/span><\/li>\n
    • Permutador de calor para arrefecimento da \u00e1gua do mar, sistema de condutas de produtos marinhos, condutas ambientais de g\u00e1s \u00e1cido,<\/span><\/li>\n
    • Permutadores de calor, evaporadores, lavagem, tubos de impregna\u00e7\u00e3o, etc. na produ\u00e7\u00e3o de \u00e1cido fosf\u00f3rico,<\/span><\/li>\n
    • Permutador de calor a ar na refina\u00e7\u00e3o de petr\u00f3leo,<\/span><\/li>\n
    • Ligas retardadoras de chama para aplica\u00e7\u00f5es de oxig\u00e9nio a alta press\u00e3o<\/span><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Scope of supply for Aviation Group Forgings, round rods, steel plates, rings, seamless pipes, steel plates\/steel belts, wire welding materials, […]<\/p>","protected":false},"featured_media":711,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[16],"product_tag":[],"class_list":{"0":"post-710","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-high-temperature-alloy","7":"desktop-align-left","8":"tablet-align-left","9":"mobile-align-left","11":"first","12":"instock","13":"shipping-taxable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/www.dura-alloy.com\/pt\/wp-json\/wp\/v2\/product\/710","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dura-alloy.com\/pt\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.dura-alloy.com\/pt\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":1,"href":"https:\/\/www.dura-alloy.com\/pt\/wp-json\/wp\/v2\/product\/710\/revisions"}],"predecessor-version":[{"id":712,"href":"https:\/\/www.dura-alloy.com\/pt\/wp-json\/wp\/v2\/product\/710\/revisions\/712"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dura-alloy.com\/pt\/wp-json\/wp\/v2\/media\/711"}],"wp:attachment":[{"href":"https:\/\/www.dura-alloy.com\/pt\/wp-json\/wp\/v2\/media?parent=710"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.dura-alloy.com\/pt\/wp-json\/wp\/v2\/product_brand?post=710"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.dura-alloy.com\/pt\/wp-json\/wp\/v2\/product_cat?post=710"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.dura-alloy.com\/pt\/wp-json\/wp\/v2\/product_tag?post=710"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}