{"id":2439,"date":"2026-01-22T10:39:08","date_gmt":"2026-01-22T09:39:08","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=2439"},"modified":"2026-01-30T03:01:28","modified_gmt":"2026-01-30T02:01:28","slug":"nimonic-75-vs-nimonic-80a","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/pt\/nimonic-75-vs-nimonic-80a\/","title":{"rendered":"Nimonic 75 vs Nimonic 80A"},"content":{"rendered":"<p>No dom\u00ednio das superligas \u00e0 base de n\u00edquel, a s\u00e9rie Nimonic representa uma pedra angular da engenharia de materiais a alta temperatura. Entre os tipos mais frequentemente comparados est\u00e3o o Nimonic 75 (UNS N06075) e o Nimonic 80A (UNS N07080). Apesar de ambas as ligas partilharem uma base de n\u00edquel-cr\u00f3mio concebida para ambientes extremos, as suas estruturas metal\u00fargicas e os seus envelopes de desempenho diferem significativamente devido aos seus mecanismos de refor\u00e7o. Este artigo fornece um aprofundamento t\u00e9cnico das suas diferen\u00e7as para ajudar os engenheiros e especialistas em aquisi\u00e7\u00f5es a tomar decis\u00f5es informadas.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-2440\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/68.jpg\" alt=\"\" width=\"1200\" height=\"746\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/68.jpg 1200w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/68-300x187.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/68-1024x637.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/68-768x477.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/68-18x12.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<h2 data-path-to-node=\"3\">Compara\u00e7\u00e3o entre Nimonic 75 e 80A<\/h2>\n<p data-path-to-node=\"4\">A distin\u00e7\u00e3o fundamental entre o Nimonic 75 e o Nimonic 80A reside na sua composi\u00e7\u00e3o qu\u00edmica e no m\u00e9todo de refor\u00e7o resultante.<\/p>\n<ul data-path-to-node=\"5\">\n<li>\n<p data-path-to-node=\"5,0,0\">O Nimonic 75 \u00e9 uma liga refor\u00e7ada por solu\u00e7\u00e3o s\u00f3lida. Trata-se essencialmente de uma matriz de n\u00edquel-cr\u00f3mio 80\/20 com adi\u00e7\u00f5es controladas de tit\u00e2nio e carbono. \u00c9 valorizada principalmente pela sua excelente resist\u00eancia \u00e0 oxida\u00e7\u00e3o e facilidade de fabrico, em vez de resist\u00eancia mec\u00e2nica a cargas elevadas.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"5,1,0\">O Nimonic 80A \u00e9 uma liga endurec\u00edvel por precipita\u00e7\u00e3o (endurecida pelo envelhecimento). Ao aumentar os teores de alum\u00ednio e tit\u00e2nio, forma uma liga de gama-prime (<span aria-hidden=\"true\">\u03b3\u2032<\/span>) fase intermet\u00e1lica (<span aria-hidden=\"true\">Ni3(Al,Ti)<\/span>) durante o tratamento t\u00e9rmico. Esta fase actua como uma barreira ao movimento de desloca\u00e7\u00e3o, aumentando significativamente a sua resist\u00eancia \u00e0 flu\u00eancia e \u00e0 fadiga.<\/p>\n<\/li>\n<\/ul>\n<p><strong>Tabela 1: Compara\u00e7\u00e3o da composi\u00e7\u00e3o qu\u00edmica (% t\u00edpico)<\/strong><\/p>\n<table data-path-to-node=\"7\">\n<thead>\n<tr>\n<td><strong>Elemento<\/strong><\/td>\n<td><strong>Nimonic 75 (Liga 75)<\/strong><\/td>\n<td><strong>Nimonic 80A (Liga 80A)<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"7,1,0,0\"><b data-path-to-node=\"7,1,0,0\" data-index-in-node=\"0\">N\u00edquel (Ni)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"7,1,1,0\">Equil\u00edbrio<\/span><\/td>\n<td><span data-path-to-node=\"7,1,2,0\">Equil\u00edbrio<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,2,0,0\"><b data-path-to-node=\"7,2,0,0\" data-index-in-node=\"0\">Cr\u00f3mio (Cr)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"7,2,1,0\">18.0 - 21.0<\/span><\/td>\n<td><span data-path-to-node=\"7,2,2,0\">18.0 - 21.0<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,3,0,0\"><b data-path-to-node=\"7,3,0,0\" data-index-in-node=\"0\">Tit\u00e2nio (Ti)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"7,3,1,0\">0.2 - 0.6<\/span><\/td>\n<td><span data-path-to-node=\"7,3,2,0\">1.8 - 2.7<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,4,0,0\"><b data-path-to-node=\"7,4,0,0\" data-index-in-node=\"0\">Alum\u00ednio (Al)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"7,4,1,0\">&#8211;<\/span><\/td>\n<td><span data-path-to-node=\"7,4,2,0\">1.0 - 1.8<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,5,0,0\"><b data-path-to-node=\"7,5,0,0\" data-index-in-node=\"0\">Ferro (Fe)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"7,5,1,0\">5.0 max<\/span><\/td>\n<td><span data-path-to-node=\"7,5,2,0\">3.0 max<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,6,0,0\"><b data-path-to-node=\"7,6,0,0\" data-index-in-node=\"0\">Carbono (C)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"7,6,1,0\">0.08 - 0.15<\/span><\/td>\n<td><span data-path-to-node=\"7,6,2,0\">0,10 max<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Tabela 2: Propriedades mec\u00e2nicas \u00e0 temperatura ambiente<\/strong><\/p>\n<table data-path-to-node=\"9\">\n<thead>\n<tr>\n<td><strong>Im\u00f3veis<\/strong><\/td>\n<td><strong>Nimonic 75 (recozido)<\/strong><\/td>\n<td><strong>Nimonic 80A (endurecido pela idade)<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"9,1,0,0\"><b data-path-to-node=\"9,1,0,0\" data-index-in-node=\"0\">Resist\u00eancia \u00e0 tra\u00e7\u00e3o (MPa)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"9,1,1,0\">~750<\/span><\/td>\n<td><span data-path-to-node=\"9,1,2,0\">~930 - 1000<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"9,2,0,0\"><b data-path-to-node=\"9,2,0,0\" data-index-in-node=\"0\">0,2% Resist\u00eancia ao escoamento (MPa)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"9,2,1,0\">~300<\/span><\/td>\n<td><span data-path-to-node=\"9,2,2,0\">~600 - 700<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"9,3,0,0\"><b data-path-to-node=\"9,3,0,0\" data-index-in-node=\"0\">Alongamento (%)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"9,3,1,0\">35 - 45<\/span><\/td>\n<td><span data-path-to-node=\"9,3,2,0\">20 - 30<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"9,4,0,0\"><b data-path-to-node=\"9,4,0,0\" data-index-in-node=\"0\">Dureza (HB)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"9,4,1,0\">150 - 200<\/span><\/td>\n<td><span data-path-to-node=\"9,4,2,0\">250 - 300<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 data-path-to-node=\"11\">Nimonic 75 vs 80A: Como escolher?<\/h2>\n<p data-path-to-node=\"12\">A sele\u00e7\u00e3o entre estas duas ligas depende do principal modo de falha da aplica\u00e7\u00e3o: Stress mec\u00e2nico vs. oxida\u00e7\u00e3o ambiental.<\/p>\n<h3 data-path-to-node=\"13\">1. Temperatura vs. Carga<\/h3>\n<p data-path-to-node=\"14\">Se a sua aplica\u00e7\u00e3o envolver temperaturas at\u00e9 <span aria-hidden=\"true\">1000\u2218C<\/span> mas que exige uma tens\u00e3o mec\u00e2nica relativamente baixa (por exemplo, componentes de fornos), o Nimonic 75 \u00e9 a melhor escolha. A sua qu\u00edmica mais simples torna-o mais est\u00e1vel contra a oxida\u00e7\u00e3o e a incrusta\u00e7\u00e3o em v\u00e1rias atmosferas industriais.<\/p>\n<p data-path-to-node=\"15\">Por outro lado, para aplica\u00e7\u00f5es em que o material deve resistir \u00e0 deforma\u00e7\u00e3o sob cargas elevadas a temperaturas at\u00e9 <span aria-hidden=\"true\">815\u2218C<\/span>, o Nimonic 80A \u00e9 indispens\u00e1vel. A sua elevada resist\u00eancia \u00e0 rutura por flu\u00eancia assegura a estabilidade dimensional sob tens\u00e3o t\u00e9rmica e mec\u00e2nica prolongada.<\/p>\n<h3 data-path-to-node=\"16\">2. Capacidade de fabrico e soldadura<\/h3>\n<p data-path-to-node=\"17\">O Nimonic 75 \u00e9 conhecido pela sua excelente soldabilidade e facilidade de conforma\u00e7\u00e3o a frio. Pode ser unido utilizando a maioria das t\u00e9cnicas normais de soldadura por fus\u00e3o (TIG\/MIG) sem risco significativo de fissura\u00e7\u00e3o.<\/p>\n<p data-path-to-node=\"18\">O Nimonic 80A, sendo uma liga endurecida por precipita\u00e7\u00e3o, \u00e9 mais sens\u00edvel. Requer um tratamento de solu\u00e7\u00e3o preciso antes da soldadura e um tratamento t\u00e9rmico p\u00f3s-soldadura (PWHT) para evitar a fissura\u00e7\u00e3o por deforma\u00e7\u00e3o. Se for necess\u00e1rio um trabalho complexo de fabrico ou de chapa met\u00e1lica, a liga 75 \u00e9 significativamente mais f\u00e1cil de utilizar.<\/p>\n<h3 data-path-to-node=\"19\">3. Efici\u00eancia de custos<\/h3>\n<p data-path-to-node=\"20\">Devido \u00e0 aus\u00eancia de alum\u00ednio e ao menor teor de tit\u00e2nio, o Nimonic 75 \u00e9 geralmente mais econ\u00f3mico. Utilize-o, a menos que as exig\u00eancias mec\u00e2nicas do projeto exijam estritamente a resist\u00eancia a altas temperaturas do 80A.<\/p>\n<h2 data-path-to-node=\"22\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-2441\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/69.jpg\" alt=\"\" width=\"1200\" height=\"1200\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/69.jpg 1200w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/69-300x300.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/69-1024x1024.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/69-150x150.jpg 150w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/69-768x768.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/69-12x12.jpg 12w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/h2>\n<h2 data-path-to-node=\"22\">Utiliza\u00e7\u00e3o de l\u00e2minas de turbina em Nimonic 75 vs 80A<\/h2>\n<p data-path-to-node=\"23\">A hist\u00f3ria da engenharia das turbinas a g\u00e1s \u00e9 essencialmente a hist\u00f3ria da s\u00e9rie Nimonic. Nos primeiros motores a jato (como o motor Whittle), o Nimonic 75 era o material original para as p\u00e1s das turbinas. No entanto, \u00e0 medida que as temperaturas e as velocidades de rota\u00e7\u00e3o do motor aumentavam, a liga 75 atingia o seu limite mec\u00e2nico.<\/p>\n<h3 data-path-to-node=\"24\">A mudan\u00e7a para o Nimonic 80A<\/h3>\n<p data-path-to-node=\"25\">O design moderno das p\u00e1s das turbinas requer materiais que possam suportar as for\u00e7as centr\u00edfugas da rota\u00e7\u00e3o a alta velocidade. O Nimonic 80A tornou-se o padr\u00e3o da ind\u00fastria para:<\/p>\n<ul data-path-to-node=\"26\">\n<li>\n<p data-path-to-node=\"26,0,0\">L\u00e2minas de turbina de alta press\u00e3o: Onde a resist\u00eancia \u00e0 flu\u00eancia \u00e9 o fator cr\u00edtico.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"26,1,0\">V\u00e1lvulas de escape: Em motores de combust\u00e3o interna de alto desempenho (especialmente nos desportos motorizados).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"26,2,0\">Discos e an\u00e9is de turbina: Requerem uma elevada resist\u00eancia \u00e0 fadiga.<\/p>\n<\/li>\n<\/ul>\n<p data-path-to-node=\"27\">While Nimonic 75 has largely been phased out of rotating blade applications, it remains a &#8220;workhorse&#8221; for static components in the turbine section. It is extensively used for combustion chamber liners, exhaust ducting, and flame tubes, where its ability to resist oxidation and thermal cycling is more valuable than its creep strength.<\/p>\n<hr data-path-to-node=\"28\" \/>\n<h3 data-path-to-node=\"29\">Perguntas e respostas relacionadas<\/h3>\n<p data-path-to-node=\"30\">Q1: Qual \u00e9 a temperatura m\u00e1xima de servi\u00e7o do Nimonic 80A? Para aplica\u00e7\u00f5es de alta tens\u00e3o, como l\u00e2minas de turbina, o Nimonic 80A \u00e9 normalmente limitado a <span aria-hidden=\"true\">815\u2218C<\/span> (<span aria-hidden=\"true\">1500\u2218F<\/span>). Acima disso, o <span aria-hidden=\"true\">\u03b3\u2032<\/span> os precipitados come\u00e7am a ficar mais grosseiros, levando a uma perda de resist\u00eancia mec\u00e2nica.<\/p>\n<p data-path-to-node=\"31\">Q2: O Nimonic 75 pode ser endurecido por tratamento t\u00e9rmico? N\u00e3o, o Nimonic 75 \u00e9 uma liga de solu\u00e7\u00e3o s\u00f3lida e n\u00e3o pode ser significativamente endurecido por tratamento t\u00e9rmico. Pode, no entanto, ser refor\u00e7ado atrav\u00e9s de trabalho a frio (endurecimento por trabalho), se necess\u00e1rio.<\/p>\n<p data-path-to-node=\"32\">Q3: Qual \u00e9 a melhor liga para resist\u00eancia a atmosferas sulf\u00faricas? Ambas as ligas oferecem uma boa resist\u00eancia devido ao seu elevado teor de cr\u00f3mio. No entanto, o Nimonic 75 \u00e9 muitas vezes preferido em ambientes de fornos industriais porque a sua camada de \u00f3xido superficial (cr\u00f3mio) \u00e9 excecionalmente est\u00e1vel e menos propensa a fragmenta\u00e7\u00e3o durante o ciclo t\u00e9rmico.<\/p>","protected":false},"excerpt":{"rendered":"<p>In the realm of nickel-based superalloys, the Nimonic series represents a cornerstone of high-temperature material engineering. Among the most frequently compared grades are Nimonic 75 (UNS N06075) and Nimonic 80A (UNS N07080). While both alloys share a nickel-chromium base designed for extreme environments, their metallurgical structures and performance envelopes differ significantly due to their strengthening 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2439","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"spectra_custom_meta":{"_edit_lock":["1769738346:1"],"_edit_last":["1"],"rank_math_internal_links_processed":["1"],"rank_math_seo_score":["59"],"rank_math_description":["A technical comparison of Nimonic 75 and 80A superalloys, exploring chemical differences, creep strength, and their roles in gas turbine blades."],"rank_math_focus_keyword":["nimonic 75 vs nimonic 80a"],"_thumbnail_id":["2440"],"_wp_page_template":["default"],"site-sidebar-layout":["default"],"ast-site-content-layout":["default"],"site-content-style":["default"],"site-sidebar-style":["default"],"theme-transparent-header-meta":["default"],"ilj_blacklistdefinition":["a:0:{}"],"ilj_linkdefinition":["a:1:{i:0;s:25:\"Nimonic 75 vs Nimonic 80A\";}"],"astra-migrate-meta-layouts":["set"],"_uag_page_assets":["a:9:{s:3:\"css\";s:263:\".uag-blocks-common-selector{z-index:var(--z-index-desktop) !important}@media (max-width: 976px){.uag-blocks-common-selector{z-index:var(--z-index-tablet) !important}}@media (max-width: 767px){.uag-blocks-common-selector{z-index:var(--z-index-mobile) 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the realm of nickel-based superalloys, the Nimonic series represents a cornerstone of high-temperature material engineering. Among the most frequently compared grades are Nimonic 75 (UNS N06075) and Nimonic 80A (UNS N07080). While both alloys share a nickel-chromium base designed for extreme environments, their metallurgical structures and performance envelopes differ significantly due to their strengthening&hellip;","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/pt\/wp-json\/wp\/v2\/posts\/2439","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/pt\/wp-json\/wp\/v2\/comments?post=2439"}],"version-history":[{"count":2,"href":"https:\/\/www.nickelcasting.com\/pt\/wp-json\/wp\/v2\/posts\/2439\/revisions"}],"predecessor-version":[{"id":2443,"href":"https:\/\/www.nickelcasting.com\/pt\/wp-json\/wp\/v2\/posts\/2439\/revisions\/2443"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/pt\/wp-json\/wp\/v2\/media\/2440"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/pt\/wp-json\/wp\/v2\/media?parent=2439"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/pt\/wp-json\/wp\/v2\/categories?post=2439"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/pt\/wp-json\/wp\/v2\/tags?post=2439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}