{"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\/de\/hastelloy-b2-vs-hastelloy-c276\/","title":{"rendered":"Hastelloy B2 gegen\u00fcber Hastelloy C276"},"content":{"rendered":"

In der Welt der Hochleistung Nickellegierungen<\/a>, Die Entscheidung zwischen Hastelloy B2 (UNS N10665) und Hastelloy C276 (UNS N10276) kann den Unterschied zwischen einem Jahrzehnt des Betriebs und einem katastrophalen Ausfall der Anlage ausmachen. Zwar geh\u00f6ren beide zur Hastelloy-Familie, doch ihre chemische DNA diktiert ein sehr unterschiedliches Verhalten gegen\u00fcber korrosiven Medien. In diesem Leitfaden werden die technischen Feinheiten erl\u00e4utert, damit Ingenieure eine fundierte Entscheidung treffen k\u00f6nnen.<\/p>\n

\"\"<\/p>\n

B2 vs. C276 Vergleich<\/h2>\n

Der grundlegende Unterschied zwischen diesen beiden Legierungen liegt in ihrer Chrom (Cr)<\/b> Inhalt. Hastelloy B2 ist im Wesentlichen eine Nickel-Molybd\u00e4n-Legierung mit fast keinem Chrom, w\u00e4hrend C276 eine Nickel-Molybd\u00e4n-Chrom-Legierung mit einem Zusatz von Wolfram ist.<\/p>\n\n\n\n\n\n\n\n\n\n\n
Element<\/strong><\/td>\nHastelloy B2 (typisch %)<\/strong><\/td>\nHastelloy C276 (typisch %)<\/strong><\/td>\n<\/tr>\n<\/thead>\n
Nickel (Ni)<\/b><\/span><\/td>\nGleichgewicht (ca. 68%)<\/span><\/td>\nGleichgewicht (ca. 57%)<\/span><\/td>\n<\/tr>\n
Molybd\u00e4n (Mo)<\/b><\/span><\/td>\n26.0 - 30.0<\/span><\/td>\n15.0 - 17.0<\/span><\/td>\n<\/tr>\n
Chrom (Cr)<\/b><\/span><\/td>\n1,0 max<\/span><\/td>\n14.5 - 16.5<\/span><\/td>\n<\/tr>\n
Eisen (Fe)<\/b><\/span><\/td>\n2,0 max<\/span><\/td>\n4.0 - 7.0<\/span><\/td>\n<\/tr>\n
Wolfram (W)<\/b><\/span><\/td>\n–<\/span><\/td>\n3.0 - 4.5<\/span><\/td>\n<\/tr>\n
Kobalt (Co)<\/b><\/span><\/td>\n1,0 max<\/span><\/td>\n2,5 max<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Hastelloy B2<\/b> ist f\u00fcr extreme Best\u00e4ndigkeit gegen Salzs\u00e4ure ausgelegt. Sein hoher Molybd\u00e4ngehalt sorgt f\u00fcr strukturelle Integrit\u00e4t in reduzierenden Umgebungen mit hohen Temperaturen. Der Mangel an Chrom macht es jedoch anf\u00e4llig f\u00fcr oxidierende Verunreinigungen selbst in Spuren.<\/p>\n

Hastelloy C276<\/b> is widely considered the “versatile” 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

Hastelloy B2 vs. C276 reduzierende vs. oxidierende Umgebungen<\/h2>\n

F\u00fcr den Vergleich zwischen B2 und C276 ist es wichtig, die Chemie Ihres Prozessstroms zu verstehen.<\/p>\n

    \n
  • \n

    Reduzierung der Umgebungsbedingungen:<\/b> Hastelloy B2 ist hier der unangefochtene K\u00f6nig, insbesondere in allen Konzentrationen von Chlorwasserstoffs\u00e4ure (HCl)<\/b> bei Temperaturen bis zum Siedepunkt. Auch in reiner Schwefels\u00e4ure und Phosphors\u00e4ure zeigt es unter reduzierenden Bedingungen eine au\u00dfergew\u00f6hnlich gute Leistung. Da es kein Chrom enth\u00e4lt, bildet es keine oxidierende Schutzschicht, so dass das Molybd\u00e4n direkt gegen die reduzierenden S\u00e4ureionen wirken kann.<\/p>\n<\/li>\n

  • \n

    Oxidierende Umgebungen:<\/b> Hier versagt Hastelloy B2 und C276 gl\u00e4nzt. Wenn Ihr System enth\u00e4lt Eisen(III)-Ionen, Kupfer(II)-Ionen oder gel\u00f6ster Sauerstoff<\/b>, B2 will undergo rapid, catastrophic corrosion. Hastelloy C276, thanks to its chromium content, can handle “mixed” 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

    B2 vs. C276, wie man sich entscheidet<\/h2>\n

    Um die richtige Sorte zu w\u00e4hlen, m\u00fcssen Sie sich eingehend mit den spezifischen Verunreinigungen Ihrer Medien befassen. Befolgen Sie diese drei technischen Regeln:<\/p>\n

      \n
    1. \n

      Auf Oxidationsmittel pr\u00fcfen:<\/b> Wenn die M\u00f6glichkeit besteht, dass Sauerstoff, Chlorgas oder oxidierende Salze (wie F<\/span>e<\/span>C<\/span>l<\/span>3<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>) vorhanden sind, C276 w\u00e4hlen<\/b>. B2 ist ausschlie\u00dflich f\u00fcr reine reduzierende S\u00e4uren bestimmt.<\/p>\n<\/li>\n

    2. \n

      Bewerten Sie die HCl-Konzentration:<\/b> F\u00fcr reine HCl in hoher Konzentration und bei hohen Temperaturen, wo C276 m\u00e4\u00dfige Korrosionsraten aufweisen k\u00f6nnte, ist B2 die bessere technische Wahl.<\/p>\n<\/li>\n

    3. \n

      Spannungsrisskorrosion (SCC) und Lochfra\u00df:<\/b> If the application involves stagnant “dead zones” where chlorides can concentrate, the molybdenum and tungsten in C276 offer better protection against localized pitting than B2.<\/p>\n<\/li>\n<\/ol>\n

      \n

      Verwandte Fragen und Antworten<\/h3>\n

      Q1: Kann Hastelloy B2 in Salpeters\u00e4ureanwendungen eingesetzt werden?<\/b><\/p>\n

      Nein.<\/b> Salpeters\u00e4ure ist ein starkes Oxidationsmittel. Hastelloy B2 hat nicht das n\u00f6tige Chrom, um einen sch\u00fctzenden Passivfilm zu bilden, und korrodiert fast sofort. Hastelloy C276 oder sogar C22 w\u00e4ren viel besser geeignet.<\/p>\n

      F2: Warum wird Hastelloy B3 oft neben B2 erw\u00e4hnt?<\/b><\/p>\n

      Hastelloy B3 ist der moderne Nachfolger von B2. Er bietet die gleiche Korrosionsbest\u00e4ndigkeit, hat aber eine verbesserte thermische Stabilit\u00e4t, wodurch er leichter zu verarbeiten ist und weniger anf\u00e4llig f\u00fcr Verspr\u00f6dung beim Schwei\u00dfen oder bei der W\u00e4rmebehandlung ist.<\/p>\n

      Q3: Which alloy is better for “Sour Gas” (H2S) environments?<\/b><\/p>\n

      Hastelloy C276 ist der Industriestandard f\u00fcr Sauergasanwendungen im \u00d6l- und Gassektor. Seine Best\u00e4ndigkeit gegen Sulfid-Spannungsrisse (SSC) und Lochfra\u00df in Gegenwart von Chloriden und H<\/span>2<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>S<\/span><\/span><\/span><\/span><\/span> macht es f\u00fcr diese komplexen, oft leicht oxidierenden Umgebungen besser geeignet als B2.<\/p>","protected":false},"excerpt":{"rendered":"

      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 […]<\/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. 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While both belong to the Hastelloy family, their chemical DNA dictates vastly different responses to corrosive media. This guide breaks down the technical…","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/posts\/2430","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/comments?post=2430"}],"version-history":[{"count":1,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/posts\/2430\/revisions"}],"predecessor-version":[{"id":2432,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/posts\/2430\/revisions\/2432"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/media\/2431"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/media?parent=2430"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/categories?post=2430"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/tags?post=2430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}