{"id":2567,"date":"2026-01-31T09:06:49","date_gmt":"2026-01-31T08:06:49","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=2567"},"modified":"2026-01-31T09:06:49","modified_gmt":"2026-01-31T08:06:49","slug":"nickel-alloy-chemical-composition","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/ja\/nickel-alloy-chemical-composition\/","title":{"rendered":"\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u5316\u5b66\u7d44\u6210\u30ac\u30a4\u30c9"},"content":{"rendered":"

When selecting materials for extreme environments\u2014whether it\u2019s the corrosive depths of a chemical processing plant or the scorching heat of a jet turbine\u2014the nickel alloy chemical composition is the single most important factor determining performance. At 28Nickel, we understand that “nickel alloy” is a broad term covering a massive spectrum of engineered metals. To the uninitiated, it\u2019s just metal; to an engineer, it is a precisely balanced recipe of elements designed to defy the laws of oxidation and mechanical failure.<\/p>\n

\"\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u5316\u5b66\u7d44\u6210\u30ac\u30a4\u30c9\"<\/p>\n

\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u3092\u79d1\u5b66\u3059\u308b<\/h3>\n

Nickel itself is a versatile base. It has a face-centered cubic (FCC) structure, which remains stable from cryogenic temperatures up to its melting point. However, pure nickel is rarely enough. By manipulating the nickel alloy chemical composition, metallurgists can “tune” the material to resist specific acids, handle immense pressure, or maintain structural integrity at 1000\u2218C<\/span>.<\/p>\n

The primary alloying elements usually include Chromium (Cr), Molybdenum (Mo), Iron (Fe), and Copper (Cu). Each serves a distinct purpose. For instance, Chromium is the primary driver for high-temperature oxidation resistance, forming a protective “scale” on the surface. Molybdenum, on the other hand, is the heavy hitter for resisting pitting and crevice corrosion in chloride-rich environments.<\/p>\n

\u5316\u5b66\u7d44\u6210\u306b\u3088\u308b\u5408\u91d1\u306e\u5206\u985e<\/h3>\n

To master the market, one must categorize these materials based on their nickel alloy chemical composition. Generally, we break them down into several “families”:<\/p>\n

    \n
  1. \n

    \u30cb\u30c3\u30b1\u30eb\u9285\u5408\u91d1\uff08Monel 400\u306a\u3069\uff09\uff1a\u8010\u6d77\u6c34\u6027\u3001\u8010\u30d5\u30c3\u9178\u6027\u306b\u512a\u308c\u3066\u3044\u308b\u3002.<\/p>\n<\/li>\n

  2. \n

    \u30cb\u30c3\u30b1\u30eb\u30fb\u30af\u30ed\u30e0\u5408\u91d1\uff08\u4f8b\uff0e, \u30a4\u30f3\u30b3\u30cd\u30eb 600<\/a>):\u71b1\u51e6\u7406\u3084\u539f\u5b50\u529b\u5de5\u5b66\u3067\u6d3b\u8e8d\u3059\u308b\u9ad8\u5f37\u5ea6\u6750\u6599\u3002.<\/p>\n<\/li>\n

  3. \n

    \u30cb\u30c3\u30b1\u30eb-\u30af\u30ed\u30e0-\u30e2\u30ea\u30d6\u30c7\u30f3\u5408\u91d1\uff08\u4f8b\uff0e, \u30cf\u30b9\u30c6\u30ed\u30a4 C-276<\/a>): Often called the “universal corrosion-resistant” alloys, their complex nickel alloy chemical composition allows them to survive the most aggressive chemical “soups.”<\/p>\n<\/li>\n<\/ol>\n

    \u6280\u8853\u30c7\u30fc\u30bf\u4ee3\u8868\u7684\u306a\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u5316\u5b66\u6210\u5206\u8868<\/h3>\n

    \u4ee5\u4e0b\u306f\u3001\u4e16\u754c\u7684\u306b\u53d6\u5f15\u3055\u308c\u3066\u3044\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u7b49\u7d1a \u306e\u5185\u8a33\u3067\u3042\u308b\u3002\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u304c\u308f\u305a\u304b\u306b\u5909\u5316\u3059\u308b\u3060\u3051\u3067\u3001\u7523\u696d\u7528\u9014\u304c\u5927\u304d\u304f\u5909\u308f\u308b\u3053\u3068\u306b\u3054\u6ce8\u76ee\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n\n\n\n\n\n
    \u30b0\u30ec\u30fc\u30c9\uff08UNS\uff09<\/td>\n\u30cb\u30c3\u30b1\u30eb\uff08%\uff09<\/td>\nCr (%)<\/td>\n\u30e2\u30ea\u30d6\u30c7\u30f3 (%)<\/td>\n\u9244 (%)<\/td>\n\u305d\u306e\u4ed6\u306e\u8981\u7d20<\/td>\n\u4e3b\u306a\u30e1\u30ea\u30c3\u30c8<\/td>\n<\/tr>\n<\/thead>\n
    \u30e2\u30cd\u30eb400 (N04400)<\/td>\n63.0\u5206<\/td>\n–<\/td>\n–<\/td>\n\u6700\u59272.5<\/td>\nCu: 28-34<\/td>\n\u8010\u5869\u6c34\u6027<\/td>\n<\/tr>\n
    \u30a4\u30f3\u30b3\u30cd\u30eb625 (N06625)<\/td>\n58.0\u5206<\/td>\n20-23<\/td>\n8-10<\/td>\n\u6700\u59275.0<\/td>\nNb: 3.15-4.15<\/td>\n\u75b2\u52b4\u5f37\u5ea6\u3068\u9178\u5316<\/td>\n<\/tr>\n
    \u30cf\u30b9\u30c6\u30ed\u30a4C-276 (N10276)<\/td>\n\u30d0\u30e9\u30f3\u30b9<\/td>\n14.5-16.5<\/td>\n15-17<\/td>\n4.0-7.0<\/td>\nW: 3.0-4.5<\/td>\n\u6975\u3081\u3066\u9ad8\u3044\u8010\u9178\u6027<\/td>\n<\/tr>\n
    \u30a4\u30f3\u30b3\u30ed\u30a4825<\/a> (N08825)<\/td>\n38-46<\/td>\n19.5-23.5<\/td>\n2.5-3.5<\/td>\n22.0\u5206<\/td>\nCu\uff1a1.5-3.0<\/td>\n\u8010\u786b\u9178\u6027<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    The “Trace” Factor: Why 0.01% Matters<\/h3>\n

    When we talk about nickel alloy chemical composition, we often focus on the big percentages. However, at 28Nickel, we know that the “trace” elements\u2014Carbon, Silicon, Manganese, and Sulfur\u2014are just as vital.<\/p>\n

    For example, in low-carbon “L” grades, keeping Carbon below 0.03%<\/span> is essential to prevent carbide precipitation during welding. If the nickel alloy chemical composition isn’t strictly controlled during the melting process (VIM or VAR melting), the material may pass a basic test but fail prematurely in the field due to “intergranular corrosion.” This is why Mill Test Reports (MTRs) are the “birth certificates” of our industry.<\/p>\n

    \u8abf\u9054\u306e\u305f\u3081\u306e\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u5316\u5b66\u7d44\u6210\u306e\u5206\u6790<\/h3>\n

    For procurement officers, the challenge isn’t just knowing the nickel alloy chemical composition; it\u2019s verifying it. Modern supply chains require rigorous testing. Positive Material Identification (PMI) using X-ray fluorescence (XRF) or Optical Emission Spectroscopy (OES) has become the gold standard.<\/p>\n

    When you buy from 28Nickel, you aren’t just buying a pipe or a plate; you are buying a guaranteed nickel alloy chemical composition that has been verified to meet ASTM, ASME, or DIN standards. Whether it\u2019s the 20%<\/span> \u30a4\u30f3\u30b3\u30cd\u30eb600\u306e\u30af\u30ed\u30e0\u307e\u305f\u306f 30%<\/span> \u30e2\u30cd\u30eb\u306e\u9285\u3001\u3053\u308c\u3089\u306e\u5143\u7d20\u306f\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u30fc\u306e\u9759\u304b\u306a\u4fdd\u8b77\u8005\u3067\u3059\u3002.<\/p>\n

    \u307e\u3068\u3081\u3068\u95a2\u9023Q&A<\/h3>\n

    \u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u306e\u5fae\u5999\u306a\u9055\u3044\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u300140\u5e74\u7d9a\u304f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30684\u30f6\u6708\u3067\u5931\u6557\u3059\u308b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u9055\u3044\u3067\u3059\u3002\u4e16\u754c\u7684\u306a\u7523\u696d\u304c\u3088\u308a\u9ad8\u3044\u52b9\u7387\u3068\u3088\u308a\u904e\u9177\u306a\u52a0\u5de5\u6761\u4ef6\u3092\u6c42\u3081\u308b\u3088\u3046\u306b\u306a\u308b\u306b\u3064\u308c\u3001\u7cbe\u5bc6\u306a\u5316\u5b66\u7269\u8cea\u7ba1\u7406\u306b\u5bfe\u3059\u308b\u8981\u6c42\u306f\u9ad8\u307e\u308b\u4e00\u65b9\u3067\u3042\u308b\u3002.<\/p>\n

    \n

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

    Q1: \u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u306f\u6eb6\u63a5\u6027\u306b\u3069\u306e\u3088\u3046\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u304b\uff1f<\/p>\n

    A: Elements like Niobium and Titanium are often added to stabilize the alloy, preventing Chromium carbide precipitation. If the nickel alloy chemical composition has too much Carbon, the “heat-affected zone” of a weld becomes vulnerable to corrosion.<\/p>\n

    Q2: \u306a\u305c\u9244\uff08Fe\uff09\u306f\u591a\u304f\u306e\u9ad8\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306b\u542b\u307e\u308c\u3066\u3044\u308b\u306e\u3067\u3059\u304b\uff1f<\/p>\n

    A: Iron is often used to manage costs and improve the thermal expansion coefficients of the material. However, in “superalloys,” the nickel alloy chemical composition usually keeps Iron low to maximize high-temperature stability.<\/p>\n

    Q3: \u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u3092\u73fe\u5834\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u304b\uff1f<\/p>\n

    A: \u306f\u3044\u3002\u30cf\u30f3\u30c9\u30d8\u30eb\u30c9PMI(Positive Material Identification)\u30ac\u30f3\u306f\u3001\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u3092\u6570\u79d2\u3067\u975e\u7834\u58ca\u5206\u6790\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u5fae\u91cf\u5143\u7d20\u306b\u3064\u3044\u3066\u306f\u3001\u30e9\u30dc\u3067\u306e\u5b8c\u5168\u5206\u6790\u304c\u6700\u3082\u6b63\u78ba\u3067\u3059\u3002.<\/p>","protected":false},"excerpt":{"rendered":"

    When selecting materials for extreme environments\u2014whether it\u2019s the corrosive depths of a chemical processing plant or the scorching heat of a jet turbine\u2014the nickel alloy chemical composition is the single most important factor determining performance. At 28Nickel, we understand that “nickel alloy” is a broad term covering a massive spectrum of engineered metals. To the uninitiated, it\u2019s just metal; to an engineer, it is a precisely balanced recipe of elements designed to defy the laws of oxidation and mechanical failure. The Science Behind Nickel Alloy Chemical Composition Nickel itself is a versatile base. It has a face-centered cubic (FCC) structure, which remains stable from cryogenic temperatures up to its melting […]<\/p>","protected":false},"author":1,"featured_media":2568,"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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!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:\"1776556632\";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-2567.css"]},"uagb_featured_image_src":{"full":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/94.jpg",1200,655,false],"thumbnail":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/94-150x150.jpg",150,150,true],"medium":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/94-300x164.jpg",300,164,true],"medium_large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/94-768x419.jpg",768,419,true],"large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/94-1024x559.jpg",1024,559,true],"1536x1536":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/94.jpg",1200,655,false],"2048x2048":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/94.jpg",1200,655,false],"trp-custom-language-flag":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/94-18x10.jpg",18,10,true]},"uagb_author_info":{"display_name":"nickel","author_link":"https:\/\/www.nickelcasting.com\/ja\/author\/nickel\/"},"uagb_comment_info":0,"uagb_excerpt":"When selecting materials for extreme environments\u2014whether it\u2019s the corrosive depths of a chemical processing plant or the scorching heat of a jet turbine\u2014the nickel alloy chemical composition is the single most important factor determining performance. At 28Nickel, we understand that “nickel alloy” is a broad term covering a massive spectrum of engineered metals. To the…","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2567","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=2567"}],"version-history":[{"count":1,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2567\/revisions"}],"predecessor-version":[{"id":2569,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2567\/revisions\/2569"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/media\/2568"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/media?parent=2567"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/categories?post=2567"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/tags?post=2567"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}