{"id":2449,"date":"2026-01-23T10:08:45","date_gmt":"2026-01-23T09:08:45","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=2449"},"modified":"2026-01-30T03:00:49","modified_gmt":"2026-01-30T02:00:49","slug":"%e5%90%88%e9%87%9120%e3%81%a8%e3%82%a4%e3%83%b3%e3%82%b3%e3%83%ad%e3%82%a4825%e3%81%ae%e9%87%8d%e8%a6%81%e3%81%aa%e7%92%b0%e5%a2%83%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%8a%80%e8%a1%93%e6%af%94","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/ja\/%e5%90%88%e9%87%9120%e3%81%a8%e3%82%a4%e3%83%b3%e3%82%b3%e3%83%ad%e3%82%a4825%e3%81%ae%e9%87%8d%e8%a6%81%e3%81%aa%e7%92%b0%e5%a2%83%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%8a%80%e8%a1%93%e6%af%94\/","title":{"rendered":"\u5408\u91d120\u3068\u30a4\u30f3\u30b3\u30ed\u30a4825\u306e\u6bd4\u8f03\uff1a\u91cd\u8981\u74b0\u5883\u306b\u304a\u3051\u308b\u6280\u8853\u6bd4\u8f03"},"content":{"rendered":"

\u8150\u98df\u6027\u306e\u9ad8\u3044\u5de5\u696d\u7528\u9014\u306b\u9069\u3057\u305f\u6750\u6599\u3092\u9078\u629e\u3059\u308b\u5834\u5408\u30012\u3064\u306e\u5f37\u529b\u306a\u30cb\u30c3\u30b1\u30eb-\u9244-\u30af\u30ed\u30e0\u5408\u91d1\u3092\u6bd4\u8f03\u3059\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\uff1a\u5408\u91d120 (UNS N08020)\u3068 \u30a4\u30f3\u30b3\u30ed\u30a4825<\/a> (UNS N08825\uff09\u3067\u3042\u308b\u3002\u3069\u3061\u3089\u3082\u8150\u98df\u6027\u306e\u5f37\u3044\u5a92\u4f53\u306b\u8010\u3048\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u51b6\u91d1\u5b66\u7684\u306a\u5fae\u5999\u306a\u9055\u3044\u306b\u3088\u308a\u3001\u7279\u5b9a\u306e\u5316\u5b66\u30d7\u30ed\u30bb\u30b9\u306b\u9069\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u304c\u6c7a\u307e\u308a\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u5408\u91d1\u306e\u6280\u8853\u7684\u306a\u9055\u3044\u3001\u6027\u80fd\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u3001\u9078\u629e\u57fa\u6e96\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002.<\/p>\n

\"\"<\/p>\n

\u5408\u91d120\u3068\u30a4\u30f3\u30b3\u30ed\u30a4825\u306e\u6bd4\u8f03<\/h2>\n

From a metallurgical perspective, both materials are “super-austenitic” or high-nickel alloys designed to bridge the gap between standard 300-series stainless steels and high-cost nickel-base superalloys. However, their stabilizing elements and nickel content set them apart.<\/p>\n

Alloy 20, often referred to as “Carpenter 20,” is stabilized with Niobium (Columbium). This addition prevents intergranular corrosion by inhibiting carbide precipitation during welding. On the other hand, Incoloy 825 is stabilized with Titanium, which serves a similar purpose but behaves differently in oxidizing environments.<\/p>\n

\u5316\u5b66\u7684\u30fb\u6a5f\u68b0\u7684\u7279\u6027\u306e\u6bd4\u8f03<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n
\u30d7\u30ed\u30d1\u30c6\u30a3<\/td>\n\u5408\u91d120 (UNS N08020)<\/td>\n\u30a4\u30f3\u30b3\u30ed\u30a4825 (UNS N08825)<\/td>\n<\/tr>\n<\/thead>\n
\u30cb\u30c3\u30b1\u30eb\uff08Ni\uff09 %<\/td>\n32.5 - 38.0<\/td>\n38.0 - 46.0<\/td>\n<\/tr>\n
\u30af\u30ed\u30e0\uff08Cr\uff09 %<\/td>\n19.0 - 21.0<\/td>\n19.5 - 23.5<\/td>\n<\/tr>\n
\u9285\uff08Cu\uff09 %<\/td>\n3.0 - 4.0<\/td>\n1.5 - 3.0<\/td>\n<\/tr>\n
\u30e2\u30ea\u30d6\u30c7\u30f3\uff08Mo\uff09 %<\/td>\n2.0 - 3.0<\/td>\n2.5 - 3.5<\/td>\n<\/tr>\n
\u30b9\u30bf\u30d3\u30e9\u30a4\u30b6\u30fc<\/td>\n\u30cb\u30aa\u30d6<\/td>\n\u30c1\u30bf\u30f3\uff08Ti\uff09<\/td>\n<\/tr>\n
\u5f15\u5f35\u5f37\u3055\uff08ksi\uff09<\/td>\n80\u5206<\/td>\n85\u5206<\/td>\n<\/tr>\n
\u964d\u4f0f\u5f37\u3055\uff080.2%\u30aa\u30d5\u30bb\u30c3\u30c8\u3001ksi\uff09<\/td>\n35\u5206<\/td>\n35\u5206<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u30a4\u30f3\u30b3\u30ed\u30a4825\u304c\u9ad8\u3044\u30cb\u30c3\u30b1\u30eb\u542b\u6709\u91cf\u3092\u8a87\u308a\u3001\u5869\u5316\u7269\u306b\u8d77\u56e0\u3059\u308b\u5fdc\u529b\u8150\u98df\u5272\u308c\uff08SCC\uff09\u306b\u5bfe\u3057\u3066\u512a\u308c\u305f\u8010\u6027\u3092\u6301\u3064\u306e\u306b\u5bfe\u3057\u3001\u5408\u91d120\u306f\u9285\u306e\u542b\u6709\u91cf\u304c\u9ad8\u3044\u306e\u304c\u7279\u5fb4\u3067\u3001\u3053\u308c\u304c\u9178\u3092\u9084\u5143\u3059\u308b\u969b\u306e\u4f1d\u8aac\u7684\u306a\u6027\u80fd\u306e\u79d8\u5bc6\u3068\u306a\u3063\u3066\u3044\u308b\u3002.<\/p>\n

\u5408\u91d120\u3068\u30a4\u30f3\u30b3\u30ed\u30a4825\u306e\u6bd4\u8f03<\/h2>\n

The decision between Alloy 20 and Incoloy 825 is rarely about which is “better,” but rather which is “right” for the specific environmental chemistry.<\/p>\n

    \n
  1. \n

    \u8010\u5869\u5316\u7269\u6027\uff1a\u6d77\u6c34\u3084\u6c7d\u6c34\u306a\u3069\u306e\u9ad8\u6fc3\u5ea6\u306e\u5869\u5316\u7269\u3092\u542b\u3080\u7528\u9014\u3067\u3001\u5b54\u98df\u3084\u9699\u9593\u8150\u98df\u304c\u61f8\u5ff5\u3055\u308c\u308b\u5834\u5408\u306f\u3001\u901a\u5e38\u30a4\u30f3\u30b3\u30ed\u30a4825\u306e\u65b9\u304c\u5b89\u5168\u3067\u3059\u3002\u30e2\u30ea\u30d6\u30c7\u30f3\u3068\u30cb\u30c3\u30b1\u30eb\u306e\u542b\u6709\u91cf\u304c\u9ad8\u3044\u305f\u3081\u3001\u8010\u5b54\u98df\u6027\u7b49\u4fa1\u6570(PREN)\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002.<\/p>\n<\/li>\n

  2. \n

    \u6e29\u5ea6\u9650\u754c\uff1a\u30a4\u30f3\u30b3\u30ed\u30a4825\u306f\u4e00\u822c\u7684\u306b\u4ee5\u4e0b\u306e\u6e29\u5ea6\u307e\u3067\u4f7f\u7528\u53ef\u80fd\u3067\u3059\u3002 1000\u2218F<\/span> (540\u2218C<\/span>)\u3067\u3042\u308b\u304c\u3001\u305d\u306e\u6a5f\u68b0\u7684\u7279\u6027\u306f\u6975\u4f4e\u6e29\u3067\u3082\u5b89\u5b9a\u3057\u3066\u3044\u308b\u3002\u3092\u4e0b\u56de\u308b\u6e29\u5ea6\u3067\u4f7f\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3002 800\u2218F<\/span>.<\/p>\n<\/li>\n

  3. \n

    \u30b3\u30b9\u30c8\u52b9\u7387\uff1a\u6b74\u53f2\u7684\u306b\u3001\u786b\u9178\u306b\u7279\u5316\u3057\u305f\u5316\u5b66\u51e6\u7406\u30d7\u30e9 \u30f3\u30c8\u3067\u306f\u3001\u5408\u91d120\u306e\u65b9\u304c\u8cbb\u7528\u5bfe\u52b9\u679c\u306b\u512a\u308c \u3066\u3044\u308b\u3002\u3057\u304b\u3057\u3001\u30a4\u30f3\u30b3\u30ed\u30a4825\u306f\u77f3\u6cb9\u30fb\u30ac\u30b9\u5206\u91ce\u3067\u3088\u308a\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u30cb\u30c3\u30b1\u30eb\u542b\u6709\u91cf\u304c\u9ad8\u3044\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u4e16\u754c\u7684\u306b\u5165\u624b\u53ef\u80fd\u306a\u30a4\u30f3\u30b3\u30ed\u30a4825\u306e\u65b9\u304c\u5165\u624b\u3057\u3084\u3059\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<\/li>\n<\/ol>\n

    \"\"<\/h2>\n

    \u786b\u9178\u7528\u5408\u91d120 vs 825<\/h2>\n

    \u786b\u9178H2SO4<\/span>)\u304c\u3053\u308c\u30892\u3064\u306e\u5408\u91d1\u306e\u4e3b\u306a\u6226\u5834\u3067\u3042\u308b\u3002\u5408\u91d120\u306f\u7279\u306b\u786b\u9178\u7528\u306b\u958b\u767a\u3055\u308c\u305f\u3002\u305d\u306e\u9ad8\u3044\u9285\u542b\u6709\u91cf(3.0-4.0%<\/span>)\u306f\u3001316L\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc\u3092\u6025\u901f\u306b\u7834\u58ca\u3059\u308b\u6fc3\u5ea6\u3067\u3042\u3063\u3066\u3082\u3001\u3053\u306e\u9084\u5143\u6027\u9178\u306e\u5b58\u5728\u4e0b\u3067\u4fdd\u8b77\u819c\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002.<\/p>\n

      \n
    • \n

      Alloy 20 Performance: It is often the “gold standard” for 20%<\/span> \u3078\u306e 40%<\/span> \u9ad8\u6e29\u3067\u306e\u786b\u9178\u3002\u307e\u3067\u306e\u5168\u6fc3\u5ea6\u7bc4\u56f2\u3067\u512a\u308c\u305f\u8010\u6027\u3092\u793a\u3059\u3002 150\u2218F<\/span> (65\u2218C<\/span>).<\/p>\n<\/li>\n

    • \n

      \u30a4\u30f3\u30b3\u30ed\u30a4825\u306e\u6027\u80fd\uff1a\u30a4\u30f3\u30b3\u30ed\u30a4825\u306f H2SO4<\/span>, it is frequently preferred when the acid is “mixed”\u2014containing oxidizing salts (like ferric or cupric ions) or chlorides. In high-temperature, highly concentrated sulfuric acid (>90%<\/span>\u306e\u3088\u3046\u306a\u7279\u6b8a\u306a\u6750\u6599\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002.<\/p>\n<\/li>\n<\/ul>\n

      In summary, for pure, “clean” sulfuric acid loops, Alloy 20 provides the most reliable longevity. For complex, contaminated chemical streams, Incoloy 825 offers a broader range of protection.<\/p>\n

      \n

      \u95a2\u9023Q&A<\/h3>\n

      Q1: \u30a2\u30ed\u30a420\u306f\u30a4\u30f3\u30b3\u30ed\u30a4825\u3088\u308a\u5fdc\u529b\u8150\u98df\u5272\u308c(SCC)\u306b\u5f37\u3044\u3067\u3059\u304b\uff1fAlloy20\u306fSCC\u306b\u5f37\u3044\u3067\u3059\u304c\u3001\u30a4\u30f3\u30b3\u30ed\u30a4825\u306f\u30cb\u30c3\u30b1\u30eb\u542b\u6709\u91cf\u304c\u591a\u3044\u306e\u3067\u3001SCC\u306b\u5bfe\u3059\u308b\u8010\u6027\u306f\u52a3\u308a\u307e\u3059\u300238-46%<\/span>)\u306f\u3001\u6975\u9650\u74b0\u5883\u306b\u304a\u3051\u308b\u5869\u5316\u7269\u8a98\u8d77\u5fdc\u529b\u8150\u98df\u5272\u308c\u306b\u5bfe\u3057\u3066\u3001\u3084\u3084\u5f37\u56fa\u306a\u9632\u5fa1\u3092\u63d0\u4f9b\u3059\u308b\u3002.<\/p>\n

      Q2: Alloy 20\u306f\u785d\u9178\u3067\u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u304b\uff1f\u306f\u3044\u3002\u30af\u30ed\u30e0\u3092\u542b\u6709\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u785d\u9178\u306e\u3088\u3046\u306a\u9178\u5316\u6027\u306e\u9178\u306b\u306f\u5f37\u3044\u8010\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u4f46\u3057\u3001\u9178\u5316\u6027\u306e\u5f37\u3044\u74b0\u5883\u3067\u3042\u308c\u3070\u3001\u6fc3\u5ea6\u3084\u6e29\u5ea6\u306b\u3088\u3063\u3066\u306f\u30a4\u30f3\u30b3\u30ed\u30a4825\u3084\u30a2\u30ed\u30a4600\u304c\u8a55\u4fa1\u3055\u308c\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002.<\/p>\n

      Q3: \u3069\u3061\u3089\u306e\u5408\u91d1\u306e\u65b9\u304c\u6eb6\u63a5\u3057\u3084\u3059\u3044\u3067\u3059\u304b\uff1f\u3069\u3061\u3089\u306e\u5408\u91d1\u3082\u512a\u308c\u305f\u6eb6\u63a5\u6027\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u5408\u91d120\u306f\u30cb\u30aa\u30d6\u5b89\u5b9a\u5316\u306b\u3088\u308a\u3001\u71b1\u5f71\u97ff\u90e8 (HAZ)\u3067\u306e\u7c92\u754c\u8150\u98df\u306b\u975e\u5e38\u306b\u5f37\u3044\u3002\u9069\u5207\u306a\u6eb6\u52a0\u6750\uff08\u4f8b\u3048\u3070\u3001\u5408\u91d120\u3067\u306fER320LR\u3001825\u3067\u306fERNiCrMo-3\uff09\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u8010\u98df\u6027\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u91cd\u8981\u3067\u3059\u3002.<\/p>","protected":false},"excerpt":{"rendered":"

      Selecting the right material for highly corrosive industrial applications often leads to a comparison between two powerhouse nickel-iron-chromium alloys: Alloy 20 (UNS N08020) and Incoloy 825 (UNS N08825). While both are engineered to withstand aggressive media, their metallurgical nuances dictate their suitability for specific chemical processes. This article explores the technical differences, performance benchmarks, and selection criteria for these alloys. Alloy 20 vs Incoloy 825 comparison From a metallurgical perspective, both materials are “super-austenitic” or high-nickel alloys designed to bridge the gap between standard 300-series stainless steels and high-cost nickel-base superalloys. However, their stabilizing elements and nickel content set them apart. Alloy 20, often referred to as “Carpenter 20,” is […]<\/p>","protected":false},"author":1,"featured_media":2454,"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 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825"],"_thumbnail_id":["2454"],"_wp_old_slug":["alloy-20-vs-incoloy-825"],"ilj_blacklistdefinition":["a:0:{}"],"ilj_linkdefinition":["a:1:{i:0;s:23:\"Alloy 20 vs Incoloy 825\";}"],"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 right material for highly corrosive industrial applications often leads to a comparison between two powerhouse nickel-iron-chromium alloys: Alloy 20 (UNS N08020) and Incoloy 825 (UNS N08825). While both are engineered to withstand aggressive media, their metallurgical nuances dictate their suitability for specific chemical processes. This article explores the technical differences, performance benchmarks, and…","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2449","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/comments?post=2449"}],"version-history":[{"count":2,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2449\/revisions"}],"predecessor-version":[{"id":2456,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2449\/revisions\/2456"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/media\/2454"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/media?parent=2449"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/categories?post=2449"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/tags?post=2449"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}