{"id":1753,"date":"2025-12-01T07:55:14","date_gmt":"2025-12-01T06:55:14","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=1753"},"modified":"2026-01-30T03:07:49","modified_gmt":"2026-01-30T02:07:49","slug":"what-is-the-difference-between-625-and-725-alloy","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/es\/what-is-the-difference-between-625-and-725-alloy\/","title":{"rendered":"\u00bfCu\u00e1l es la diferencia entre las aleaciones 625 y 725?"},"content":{"rendered":"<p data-path-to-node=\"17\">Aunque comparten un c\u00f3digo gen\u00e9tico casi id\u00e9ntico en lo que respecta a la resistencia a la corrosi\u00f3n, la diferencia radica por completo en c\u00f3mo gestionan la tensi\u00f3n mec\u00e1nica.<\/p>\n<p data-path-to-node=\"17\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-1754 aligncenter\" src=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13.jpg\" alt=\"\" width=\"1200\" height=\"675\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13.jpg 1200w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13-300x169.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13-1024x576.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13-768x432.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<h2>Composici\u00f3n qu\u00edmica<\/h2>\n<p data-path-to-node=\"19\">Para entender la diferencia, primero debemos fijarnos en la qu\u00edmica. La aleaci\u00f3n 625 es una aleaci\u00f3n de n\u00edquel, cromo y molibdeno que contiene niobio. Esta combinaci\u00f3n ofrece una excelente resistencia a la corrosi\u00f3n por picaduras y fisuras.<\/p>\n<p data-path-to-node=\"20\"><b>Aleaci\u00f3n 725 (UNS N07725)<\/b> es esencialmente aleaci\u00f3n 625 con una modificaci\u00f3n espec\u00edfica. Los metal\u00fargicos tomaron la base resistente a la corrosi\u00f3n probada del 625 y le a\u00f1adieron peque\u00f1as cantidades precisas de <b>Titanio (Ti) y aluminio (Al)<\/b>.<\/p>\n<ul data-path-to-node=\"21\">\n<li>\n<p data-path-to-node=\"21,0,0\"><b>Aleaci\u00f3n 625:<\/b> Reforzado principalmente por el efecto rigidizador del molibdeno y el niobio en la matriz de n\u00edquel-cromo (refuerzo por soluci\u00f3n s\u00f3lida).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"21,1,0\"><b>Aleaci\u00f3n 725:<\/b> Reforzado por la precipitaci\u00f3n de fases microsc\u00f3picas de gamma-prima y gamma-doble-prima durante el tratamiento t\u00e9rmico (endurecimiento por precipitaci\u00f3n).<\/p>\n<\/li>\n<\/ul>\n<h2>La diferencia del n\u00facleo: El l\u00edmite el\u00e1stico<\/h2>\n<p data-path-to-node=\"23\">Si la resistencia a la corrosi\u00f3n es el escudo, el l\u00edmite el\u00e1stico es el m\u00fasculo. Aqu\u00ed es donde el <b>diferencia entre aleaci\u00f3n 625 y 725<\/b> se hace innegable.<\/p>\n<p data-path-to-node=\"24\">Alloy 625 is tough, but in its annealed state, its yield strength is typically around 60-70 ksi (414-483 MPa). To make it stronger, it must be &#8220;cold worked&#8221; (physically compressed or drawn), which limits the shapes and sizes you can produce.<\/p>\n<p data-path-to-node=\"25\">La aleaci\u00f3n 725 cambia las reglas del juego. Gracias al titanio y el aluminio a\u00f1adidos, puede someterse a tratamiento t\u00e9rmico (envejecimiento) para alcanzar una resistencia ultraelevada sin necesidad de trabajo en fr\u00edo. <b>La aleaci\u00f3n 725 alcanza habitualmente l\u00edmites el\u00e1sticos superiores a 120 ksi (827 MPa), casi el doble que la aleaci\u00f3n 625 recocida.<\/b><\/p>\n<p data-path-to-node=\"26\">Esto hace que la aleaci\u00f3n 725 sea la mejor opci\u00f3n para secciones grandes y complejas que requieren una alta resistencia pero que son demasiado gruesas para ser trabajadas en fr\u00edo de forma eficaz.<\/p>\n<h2>Resistencia a la corrosi\u00f3n<\/h2>\n<p data-path-to-node=\"28\">Engineers often fear that increasing strength means sacrificing corrosion resistance. Fortunately, with these two alloys, that isn&#8217;t the case.<\/p>\n<p data-path-to-node=\"29\">Porque la qu\u00edmica de base (alto contenido en n\u00edquel y molibdeno) se mantiene constante, <b>La aleaci\u00f3n 725 conserva esencialmente la misma resistencia a la corrosi\u00f3n que la aleaci\u00f3n 625.<\/b> Ambas aleaciones ofrecen una resistencia excepcional a:<\/p>\n<ul data-path-to-node=\"30\">\n<li>\n<p data-path-to-node=\"30,0,0\">Agua de mar y medios marinos.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"30,1,0\">Corrosi\u00f3n por picaduras y grietas.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"30,2,0\">Agrietamiento por tensi\u00f3n de sulfuro (SSC).<\/p>\n<\/li>\n<\/ul>\n<p data-path-to-node=\"31\">Esta combinaci\u00f3n \u00fanica sit\u00faa a la aleaci\u00f3n 725 en una categor\u00eda distinta: ofrece la resistencia a la corrosi\u00f3n de la 625 con la fuerza de la aleaci\u00f3n 718.<\/p>\n<h2>Escenarios de aplicaci\u00f3n: \u00bfCu\u00e1ndo utilizar Which?<\/h2>\n<p data-path-to-node=\"33\">La elecci\u00f3n suele reducirse a la carga mec\u00e1nica de la aplicaci\u00f3n.<\/p>\n<p data-path-to-node=\"34\"><b>Elija la aleaci\u00f3n 625 cuando:<\/b><\/p>\n<ul data-path-to-node=\"35\">\n<li>\n<p data-path-to-node=\"35,0,0\">Necesita una excelente fabricabilidad y soldabilidad.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"35,1,0\">La aplicaci\u00f3n implica el revestimiento (superposici\u00f3n) o componentes de chapa met\u00e1lica como conductos de escape.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"35,2,0\">El l\u00edmite el\u00e1stico extremo no es el requisito principal.<\/p>\n<\/li>\n<\/ul>\n<p data-path-to-node=\"36\"><b>Elija la aleaci\u00f3n 725 cuando:<\/b><\/p>\n<ul data-path-to-node=\"37\">\n<li>\n<p data-path-to-node=\"37,0,0\">You are designing <a href=\"https:\/\/www.nickelcasting.com\/pt\/product-forms\/fasteners\/\">fijaciones<\/a>, hangers, or landing nipples for Sour Gas service (NACE MR0175).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"37,1,0\">Es necesario que el material soporte grandes esfuerzos de tracci\u00f3n en entornos marinos.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"37,2,0\">El componente es una barra de gran secci\u00f3n o una forja en la que es imposible trabajar en fr\u00edo.<\/p>\n<\/li>\n<\/ul>\n<p data-path-to-node=\"39\"><img decoding=\"async\" class=\"size-full wp-image-1416 aligncenter\" src=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/11\/suoluetu.jpg\" alt=\"\" width=\"1200\" height=\"675\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/11\/suoluetu.jpg 1200w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/11\/suoluetu-300x169.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/11\/suoluetu-1024x576.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/11\/suoluetu-768x432.jpg 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<h3>Preguntas m\u00e1s frecuentes (FAQ)<\/h3>\n<p data-path-to-node=\"42\"><b>P1: \u00bfSe puede soldar la aleaci\u00f3n 725 con la misma facilidad que la aleaci\u00f3n 625?<\/b><\/p>\n<p data-path-to-node=\"42\">Aunque ambas pueden soldarse, se considera que la aleaci\u00f3n 625 tiene una soldabilidad superior y a menudo se utiliza como metal de aportaci\u00f3n. La aleaci\u00f3n 725 puede soldarse, pero como es una aleaci\u00f3n endurecible por envejecimiento, suele requerir un tratamiento t\u00e9rmico posterior a la soldadura para restaurar sus propiedades de alta resistencia en la zona afectada por el calor.<\/p>\n<p data-path-to-node=\"43\"><b>P2: \u00bfEs magn\u00e9tica la aleaci\u00f3n 725?<\/b><\/p>\n<p data-path-to-node=\"43\">Al igual que la Aleaci\u00f3n 625, la Aleaci\u00f3n 725 es una superaleaci\u00f3n a base de n\u00edquel y es no magn\u00e9tica en todas las condiciones. Esto hace que ambas aleaciones sean adecuadas para aplicaciones en las que debe minimizarse la permeabilidad magn\u00e9tica, como en carcasas electr\u00f3nicas sensibles o componentes submarinos.<\/p>\n<p data-path-to-node=\"44\"><b>P3: \u00bfPor qu\u00e9 la aleaci\u00f3n 725 es m\u00e1s cara que la 625?<\/b><\/p>\n<p data-path-to-node=\"44\">La diferencia de coste se debe a la complejidad del proceso. Aunque los costes de la materia prima son comparables, la aleaci\u00f3n 725 requiere una fusi\u00f3n al vac\u00edo precisa y ciclos de tratamiento t\u00e9rmico prolongados (recocido por disoluci\u00f3n m\u00e1s envejecimiento en dos fases) para conseguir sus propiedades mec\u00e1nicas. Adem\u00e1s, la aleaci\u00f3n 625 se produce en vol\u00famenes mucho mayores, lo que ofrece econom\u00edas de escala.<\/p>","protected":false},"excerpt":{"rendered":"<p>While they share a nearly identical genetic code regarding corrosion resistance, the distinction lies entirely in how they handle mechanical stress. Chemical Composition To understand the difference, we must first look at the chemistry. Alloy 625 is a nickel-chromium-molybdenum alloy containing niobium. This combination delivers outstanding resistance to pitting and crevice corrosion. Alloy 725 (UNS [&hellip;]<\/p>","protected":false},"author":1,"featured_media":1754,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","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-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":"","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-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":"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":""},"mobile":{"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":""}},"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1753","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"spectra_custom_meta":{"_edit_lock":["1769738869:1"],"_edit_last":["1"],"_thumbnail_id":["1754"],"_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"],"_yoast_wpseo_primary_category":["3"],"_yoast_wpseo_focuskw":["What is the difference between 625 and 725 alloy"],"_yoast_wpseo_title":["%%title%% %%page%% %%sep%% 28Nickel"],"_yoast_wpseo_metadesc":["What is the difference between 625 and 725 alloy? While chemically similar, Alloy 725 offers significantly higher strength through precipitation hardening."],"_yoast_wpseo_linkdex":["70"],"_yoast_wpseo_content_score":["90"],"_yoast_wpseo_estimated-reading-time-minutes":["4"],"rank_math_primary_category":["3"],"rank_math_title":["%title% %page% %sep% 28Nickel"],"rank_math_description":["What is the difference between 625 and 725 alloy? While chemically similar, Alloy 725 offers significantly higher strength through precipitation hardening."],"rank_math_focus_keyword":["What is the difference between 625 and 725 alloy"],"rank_math_news_sitemap_robots":["index"],"rank_math_robots":["a:1:{i:0;s:5:\"index\";}"],"rank_math_seo_score":["55"],"rank_math_internal_links_processed":["1"],"ilj_blacklistdefinition":["a:0:{}"],"ilj_linkdefinition":["a:1:{i:0;s:48:\"What is the difference between 625 and 725 alloy\";}"],"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) !important}}\n\";s:2:\"js\";s:0:\"\";s:18:\"current_block_list\";a:8:{i:0;s:11:\"core\/search\";i:1;s:10:\"core\/group\";i:2;s:12:\"core\/heading\";i:3;s:17:\"core\/latest-posts\";i:4;s:20:\"core\/latest-comments\";i:5;s:13:\"core\/archives\";i:6;s:15:\"core\/categories\";i:7;s:10:\"core\/image\";}s:8:\"uag_flag\";b:0;s:11:\"uag_version\";s:10:\"1775384825\";s:6:\"gfonts\";a:0:{}s:10:\"gfonts_url\";s:0:\"\";s:12:\"gfonts_files\";a:0:{}s:14:\"uag_faq_layout\";b:0;}"],"_elementor_page_assets":["a:0:{}"],"_uag_css_file_name":["uag-css-1753.css"]},"uagb_featured_image_src":{"full":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13.jpg",1200,675,false],"thumbnail":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13-150x150.jpg",150,150,true],"medium":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13-300x169.jpg",300,169,true],"medium_large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13-768x432.jpg",768,432,true],"large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13-1024x576.jpg",1024,576,true],"1536x1536":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13.jpg",1200,675,false],"2048x2048":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13.jpg",1200,675,false],"trp-custom-language-flag":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/13-18x10.jpg",18,10,true]},"uagb_author_info":{"display_name":"nickel","author_link":"https:\/\/www.nickelcasting.com\/es\/author\/nickel\/"},"uagb_comment_info":0,"uagb_excerpt":"While they share a nearly identical genetic code regarding corrosion resistance, the distinction lies entirely in how they handle mechanical stress. Chemical Composition To understand the difference, we must first look at the chemistry. Alloy 625 is a nickel-chromium-molybdenum alloy containing niobium. This combination delivers outstanding resistance to pitting and crevice corrosion. Alloy 725 (UNS&hellip;","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/posts\/1753","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/comments?post=1753"}],"version-history":[{"count":2,"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/posts\/1753\/revisions"}],"predecessor-version":[{"id":2555,"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/posts\/1753\/revisions\/2555"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/media\/1754"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/media?parent=1753"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/categories?post=1753"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/es\/wp-json\/wp\/v2\/tags?post=1753"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}