{"id":2430,"date":"2026-01-17T08:53:10","date_gmt":"2026-01-17T07:53:10","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=2430"},"modified":"2026-01-30T03:02:01","modified_gmt":"2026-01-30T02:02:01","slug":"hastelloy-b2-vs-hastelloy-c276","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/it\/hastelloy-b2-vs-hastelloy-c276\/","title":{"rendered":"Hastelloy B2 vs Hastelloy C276"},"content":{"rendered":"<p data-path-to-node=\"5\">Nel mondo delle alte prestazioni <a href=\"https:\/\/www.nickelcasting.com\/pt\/ligas-de-niquel\/\">leghe di nichel<\/a>, La scelta tra Hastelloy B2 (UNS N10665) e Hastelloy C276 (UNS N10276) pu\u00f2 fare la differenza tra un decennio di servizio e un guasto catastrofico alle apparecchiature. Pur appartenendo entrambi alla famiglia degli Hastelloy, il loro DNA chimico impone risposte molto diverse ai mezzi corrosivi. Questa guida analizza le sfumature tecniche per aiutare gli ingegneri a prendere una decisione informata.<\/p>\n<p data-path-to-node=\"5\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-2431\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63.jpg\" alt=\"\" width=\"1024\" height=\"1024\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63-300x300.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63-150x150.jpg 150w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63-768x768.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63-12x12.jpg 12w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h2 data-path-to-node=\"6\">Confronto tra B2 e C276<\/h2>\n<p data-path-to-node=\"7\">La differenza fondamentale tra queste due leghe risiede nella loro <b data-path-to-node=\"7\" data-index-in-node=\"66\">Cromo (Cr)<\/b> contenuto. L'Hastelloy B2 \u00e8 essenzialmente una lega di nichel-molibdeno quasi priva di cromo, mentre il C276 \u00e8 una lega di nichel-molibdeno-cromo con l'aggiunta di tungsteno.<\/p>\n<table data-path-to-node=\"8\">\n<thead>\n<tr>\n<td><strong>Elemento<\/strong><\/td>\n<td><strong>Hastelloy B2 (tipico %)<\/strong><\/td>\n<td><strong>Hastelloy C276 (tipico %)<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"8,1,0,0\"><b data-path-to-node=\"8,1,0,0\" data-index-in-node=\"0\">Nichel (Ni)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"8,1,1,0\">Equilibrio (circa 68%)<\/span><\/td>\n<td><span data-path-to-node=\"8,1,2,0\">Equilibrio (circa 57%)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"8,2,0,0\"><b data-path-to-node=\"8,2,0,0\" data-index-in-node=\"0\">Molibdeno (Mo)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"8,2,1,0\">26.0 - 30.0<\/span><\/td>\n<td><span data-path-to-node=\"8,2,2,0\">15.0 - 17.0<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"8,3,0,0\"><b data-path-to-node=\"8,3,0,0\" data-index-in-node=\"0\">Cromo (Cr)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"8,3,1,0\">1,0 max<\/span><\/td>\n<td><span data-path-to-node=\"8,3,2,0\">14.5 - 16.5<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"8,4,0,0\"><b data-path-to-node=\"8,4,0,0\" data-index-in-node=\"0\">Ferro (Fe)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"8,4,1,0\">2.0 max<\/span><\/td>\n<td><span data-path-to-node=\"8,4,2,0\">4.0 - 7.0<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"8,5,0,0\"><b data-path-to-node=\"8,5,0,0\" data-index-in-node=\"0\">Tungsteno (W)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"8,5,1,0\">&#8211;<\/span><\/td>\n<td><span data-path-to-node=\"8,5,2,0\">3.0 - 4.5<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"8,6,0,0\"><b data-path-to-node=\"8,6,0,0\" data-index-in-node=\"0\">Cobalto (Co)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"8,6,1,0\">1,0 max<\/span><\/td>\n<td><span data-path-to-node=\"8,6,2,0\">2,5 max<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p data-path-to-node=\"9\"><b data-path-to-node=\"9\" data-index-in-node=\"0\">Hastelloy B2<\/b> \u00e8 progettato per una resistenza estrema all'acido cloridrico. L'elevato contenuto di molibdeno garantisce l'integrit\u00e0 strutturale in ambienti riducenti ad alta temperatura. Tuttavia, la mancanza di cromo lo rende vulnerabile anche a tracce di contaminanti ossidanti.<\/p>\n<p data-path-to-node=\"10\"><b data-path-to-node=\"10\" data-index-in-node=\"0\">Hastelloy C276<\/b> is widely considered the &#8220;versatile&#8221; alloy. The 16% chromium content creates a passive oxide film that protects the metal from oxidizing salts and gases, while the molybdenum and tungsten provide exceptional resistance to pitting and crevice corrosion in chloride-rich environments.<\/p>\n<h2 data-path-to-node=\"11\">Hastelloy B2 vs C276 ambienti riducenti vs ossidanti<\/h2>\n<p data-path-to-node=\"12\">La comprensione della chimica del flusso di processo \u00e8 fondamentale nel confronto tra B2 e C276.<\/p>\n<ul data-path-to-node=\"13\">\n<li>\n<p data-path-to-node=\"13,0,0\"><b data-path-to-node=\"13,0,0\" data-index-in-node=\"0\">Riduzione degli ambienti:<\/b> L'Hastelloy B2 \u00e8 il re indiscusso in questo caso, in particolare in tutte le concentrazioni di <b data-path-to-node=\"13,0,0\" data-index-in-node=\"103\">Acido cloridrico (HCl)<\/b> a temperature fino al punto di ebollizione. Inoltre, si comporta in modo eccezionale nell'acido solforico puro e nell'acido fosforico in condizioni riducenti. Mancando il cromo, non forma uno strato protettivo ossidante, permettendo al molibdeno di agire direttamente contro gli ioni acidi riducenti.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"13,1,0\"><b data-path-to-node=\"13,1,0\" data-index-in-node=\"0\">Ambienti ossidanti:<\/b> \u00c8 qui che l'Hastelloy B2 fallisce e il C276 brilla. Se il sistema contiene <b data-path-to-node=\"13,1,0\" data-index-in-node=\"98\">Ioni ferrici, ioni rameici o ossigeno disciolto<\/b>, B2 will undergo rapid, catastrophic corrosion. Hastelloy C276, thanks to its chromium content, can handle &#8220;mixed&#8221; acids\u2014streams that are primarily reducing but contain oxidizing impurities. It is the go-to material for flue gas desulfurization (FGD) and complex chemical processing where the environment might fluctuate.<\/p>\n<\/li>\n<\/ul>\n<h2 data-path-to-node=\"14\">B2 vs C276: come scegliere<\/h2>\n<p data-path-to-node=\"15\">La scelta del grado giusto richiede un'analisi approfondita dei contaminanti specifici del supporto. Seguite queste tre regole ingegneristiche:<\/p>\n<ol start=\"1\" data-path-to-node=\"16\">\n<li>\n<p data-path-to-node=\"16,0,0\"><b data-path-to-node=\"16,0,0\" data-index-in-node=\"0\">Verificare la presenza di ossidanti:<\/b> Se c'\u00e8 la possibilit\u00e0 di ossigeno, gas di cloro o sali ossidanti (come <span class=\"math-inline\" data-math=\"FeCl_3\" data-index-in-node=\"94\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">F<\/span><span class=\"mord mathnormal\">e<\/span><span class=\"mord mathnormal\">C<\/span><span class=\"mord\"><span class=\"mord mathnormal\">l<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">3<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>) presenti, <b data-path-to-node=\"16,0,0\" data-index-in-node=\"117\">scegliere C276<\/b>. B2 \u00e8 strettamente riservato agli acidi riducenti puri.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"16,1,0\"><b data-path-to-node=\"16,1,0\" data-index-in-node=\"0\">Valutare la concentrazione di HCl:<\/b> Per l'HCl puro ad alta concentrazione e ad alta temperatura, dove il C276 potrebbe mostrare tassi di corrosione moderati, il B2 \u00e8 la scelta tecnica superiore.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"16,2,0\"><b data-path-to-node=\"16,2,0\" data-index-in-node=\"0\">Cricche da corrosione da stress (SCC) e vaiolatura:<\/b> If the application involves stagnant &#8220;dead zones&#8221; where chlorides can concentrate, the molybdenum and tungsten in C276 offer better protection against localized pitting than B2.<\/p>\n<\/li>\n<\/ol>\n<hr data-path-to-node=\"17\" \/>\n<h3 data-path-to-node=\"18\">Domande e risposte correlate<\/h3>\n<p data-path-to-node=\"19\"><b data-path-to-node=\"19\" data-index-in-node=\"0\">Q1: L'Hastelloy B2 pu\u00f2 essere utilizzato in applicazioni con acido nitrico?<\/b><\/p>\n<p data-path-to-node=\"19\"><b data-path-to-node=\"19\" data-index-in-node=\"58\">No.<\/b> L'acido nitrico \u00e8 un forte agente ossidante. L'Hastelloy B2 non ha il cromo necessario per formare una pellicola protettiva passiva e si corrode quasi istantaneamente. L'Hastelloy C276 o addirittura il C22 sarebbero molto pi\u00f9 appropriati.<\/p>\n<p data-path-to-node=\"20\"><b data-path-to-node=\"20\" data-index-in-node=\"0\">D2: Perch\u00e9 l'Hastelloy B3 \u00e8 spesso citato insieme al B2?<\/b><\/p>\n<p data-path-to-node=\"20\">L'Hastelloy B3 \u00e8 il moderno successore del B2. Offre la stessa resistenza alla corrosione, ma ha una migliore stabilit\u00e0 termica, che lo rende pi\u00f9 facile da fabbricare e meno incline all'infragilimento durante la saldatura o il trattamento termico.<\/p>\n<p data-path-to-node=\"21\"><b data-path-to-node=\"21\" data-index-in-node=\"0\">Q3: Which alloy is better for &#8220;Sour Gas&#8221; (H2S) environments?<\/b><\/p>\n<p data-path-to-node=\"21\">L'Hastelloy C276 \u00e8 lo standard industriale per il servizio sour gas nel settore petrolifero e del gas. La sua resistenza alla criccatura da stress solfidrico (SSC) e alla vaiolatura in presenza di cloruri e di <span class=\"math-inline\" data-math=\"H_2S\" data-index-in-node=\"242\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">H<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">2<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><span class=\"mord mathnormal\">S<\/span><\/span><\/span><\/span><\/span> lo rende superiore al B2 per questi ambienti complessi, spesso leggermente ossidanti.<\/p>","protected":false},"excerpt":{"rendered":"<p>In the world of high-performance nickel alloys, choosing between Hastelloy B2 (UNS N10665) and Hastelloy C276 (UNS N10276) can be the difference between a decade of service and a catastrophic equipment failure. While both belong to the Hastelloy family, their chemical DNA dictates vastly different responses to corrosive media. This guide breaks down the technical [&hellip;]<\/p>","protected":false},"author":1,"featured_media":2431,"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-2430","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"spectra_custom_meta":{"_edit_lock":["1769738380:1"],"_edit_last":["1"],"rank_math_seo_score":["57"],"rank_math_description":["Choosing the right grade requires a deep dive into the specific contaminants of your media. Follow these three engineering rules"],"rank_math_focus_keyword":["Hastelloy B2 vs Hastelloy C276"],"_thumbnail_id":["2431"],"_wp_page_template":["default"],"rank_math_internal_links_processed":["1"],"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:30:\"Hastelloy B2 vs Hastelloy C276\";}"],"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:\"1775911551\";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-2430.css"]},"uagb_featured_image_src":{"full":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63.jpg",1024,1024,false],"thumbnail":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63-150x150.jpg",150,150,true],"medium":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63-300x300.jpg",300,300,true],"medium_large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63-768x768.jpg",768,768,true],"large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63.jpg",1024,1024,false],"1536x1536":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63.jpg",1024,1024,false],"2048x2048":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63.jpg",1024,1024,false],"trp-custom-language-flag":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/63-12x12.jpg",12,12,true]},"uagb_author_info":{"display_name":"nickel","author_link":"https:\/\/www.nickelcasting.com\/it\/author\/nickel\/"},"uagb_comment_info":0,"uagb_excerpt":"In the world of high-performance nickel alloys, choosing between Hastelloy B2 (UNS N10665) and Hastelloy C276 (UNS N10276) can be the difference between a decade of service and a catastrophic equipment failure. While both belong to the Hastelloy family, their chemical DNA dictates vastly different responses to corrosive media. This guide breaks down the technical&hellip;","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/posts\/2430","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/comments?post=2430"}],"version-history":[{"count":1,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/posts\/2430\/revisions"}],"predecessor-version":[{"id":2432,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/posts\/2430\/revisions\/2432"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/media\/2431"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/media?parent=2430"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/categories?post=2430"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/tags?post=2430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}