{"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\/ja\/what-is-the-difference-between-625-and-725-alloy\/","title":{"rendered":"625\u5408\u91d1\u3068725\u5408\u91d1\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<p data-path-to-node=\"17\">\u8010\u98df\u6027\u306b\u95a2\u3057\u3066\u306f\u307b\u307c\u540c\u3058\u907a\u4f1d\u6697\u53f7\u3092\u5171\u6709\u3057\u3066\u3044\u308b\u304c\u3001\u305d\u306e\u9055\u3044\u306f\u6a5f\u68b0\u7684\u30b9\u30c8\u30ec\u30b9\u3078\u306e\u5bfe\u51e6\u306e\u4ed5\u65b9\u306b\u3042\u308b\u3002.<\/p>\n<p data-path-to-node=\"17\"><img loading=\"lazy\" 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=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<h2>\u5316\u5b66\u7d44\u6210<\/h2>\n<p data-path-to-node=\"19\">\u3053\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u307e\u305a\u5316\u5b66\u7684\u6027\u8cea\u306b\u76ee\u3092\u5411\u3051\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u5408\u91d1625\u306f\u3001\u30cb\u30aa\u30d6\u3092\u542b\u3080\u30cb\u30c3\u30b1\u30eb-\u30af\u30ed\u30e0-\u30e2\u30ea\u30d6\u30c7\u30f3\u5408\u91d1\u3067\u3059\u3002\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u5b54\u98df\u3084\u9699\u9593\u8150\u98df\u306b\u5bfe\u3057\u3066\u5353\u8d8a\u3057\u305f\u8010\u6027\u3092\u767a\u63ee\u3057\u307e\u3059\u3002.<\/p>\n<p data-path-to-node=\"20\"><b>\u5408\u91d1725 (UNS N07725)<\/b> \u306f\u3001\u57fa\u672c\u7684\u306b\u5408\u91d1625\u306b\u7279\u6b8a\u306a\u6539\u826f\u3092\u52a0\u3048\u305f\u3082\u306e\u3067\u3042\u308b\u3002\u51b6\u91d1\u5b66\u8005\u306f\u3001625\u306e\u5b9f\u7e3e\u306e\u3042\u308b\u8010\u98df\u6027\u3092\u30d9\u30fc\u30b9\u306b\u3001\u5c11\u91cf\u3067\u6b63\u78ba\u306a\u91cf\u306e <b>\u30c1\u30bf\u30f3\uff08Ti\uff09\u3068\u30a2\u30eb\u30df\u30cb\u30a6\u30e0\uff08Al\uff09<\/b>.<\/p>\n<ul data-path-to-node=\"21\">\n<li>\n<p data-path-to-node=\"21,0,0\"><b>\u30a2\u30ed\u30a4625<\/b> \u4e3b\u306b\u30cb\u30c3\u30b1\u30eb\u30fb\u30af\u30ed\u30e0\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u4e2d\u306e\u30e2\u30ea\u30d6\u30c7\u30f3\u3068\u30cb\u30aa\u30d6\u306e\u525b\u6027\u52b9\u679c\u306b\u3088\u3063\u3066\u5f37\u5316\u3055\u308c\u308b\uff08\u56fa\u6eb6\u5f37\u5316\uff09\u3002.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"21,1,0\"><b>\u5408\u91d1725\uff1a<\/b> \u71b1\u51e6\u7406\u4e2d\u306b\u5fae\u7d30\u306a\u30ac\u30f3\u30de\u30d7\u30e9\u30a4\u30e0\u76f8\u3068\u30ac\u30f3\u30de\u30c0\u30d6\u30eb\u30d7\u30e9\u30a4\u30e0\u76f8\u304c\u6790\u51fa\u3059\u308b\u3053\u3068\u3067\u5f37\u5316\u3055\u308c\u308b\uff08\u6790\u51fa\u786c\u5316\uff09\u3002.<\/p>\n<\/li>\n<\/ul>\n<h2>\u30b3\u30a2\u306e\u9055\u3044\u964d\u4f0f\u5f37\u5ea6<\/h2>\n<p data-path-to-node=\"23\">\u8010\u98df\u6027\u304c\u76fe\u306a\u3089\u3001\u964d\u4f0f\u5f37\u5ea6\u306f\u7b4b\u8089\u3067\u3042\u308b\u3002\u3053\u3053\u304c <b>625\u5408\u91d1\u3068725\u5408\u91d1\u306e\u9055\u3044<\/b> \u306f\u5426\u5b9a\u3067\u304d\u306a\u304f\u306a\u308b\u3002.<\/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\">\u5408\u91d1725\u306f\u30b2\u30fc\u30e0\u3092\u5909\u3048\u307e\u3059\u3002\u30c1\u30bf\u30f3\u3068\u30a2\u30eb\u30df\u30cb\u30a6\u30e0\u304c\u6dfb\u52a0\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u51b7\u9593\u52a0\u5de5\u3092\u5fc5\u8981\u3068\u305b\u305a\u3001\u71b1\u51e6\u7406\uff08\u6642\u52b9\u51e6\u7406\uff09\u306b\u3088\u308a\u8d85\u9ad8\u5f37\u5ea6\u3092\u9054\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002. <b>\u5408\u91d1725\u306f\u3001\u65e5\u5e38\u7684\u306b120ksi\uff08827MPa\uff09\u3092\u8d85\u3048\u308b\u964d\u4f0f\u5f37\u5ea6\u3092\u9054\u6210\u3057\u3066\u304a\u308a\u3001\u3053\u308c\u306f\u713c\u920d\u3055\u308c\u305f\u5408\u91d1625\u306e\u307b\u307c2\u500d\u3067\u3042\u308b\u3002.<\/b><\/p>\n<p data-path-to-node=\"26\">\u3053\u306e\u305f\u3081\u3001\u5408\u91d1725\u306f\u3001\u9ad8\u5f37\u5ea6\u3092\u8981\u6c42\u3055\u308c\u308b\u3082\u306e\u306e\u3001\u539a\u3059\u304e\u3066\u51b7\u9593\u52a0\u5de5\u304c\u52b9\u679c\u7684\u306b\u884c\u3048\u306a\u3044\u5927\u578b\u3067\u8907\u96d1\u306a\u90e8\u4f4d\u306b\u9069\u3057\u305f\u512a\u308c\u305f\u9078\u629e\u80a2\u3068\u306a\u3063\u3066\u3044\u308b\u3002.<\/p>\n<h2>\u8010\u98df\u6027<\/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\">\u30d9\u30fc\u30b9\u3068\u306a\u308b\u5316\u5b66\u7684\u6027\u8cea\uff08\u9ad8\u30cb\u30c3\u30b1\u30eb\u3068\u30e2\u30ea\u30d6\u30c7\u30f3\uff09\u306f\u4e00\u8cab\u3057\u3066\u3044\u308b\u304b\u3089\u3060\u3001, <b>\u5408\u91d1725\u306f\u3001\u57fa\u672c\u7684\u306b\u5408\u91d1625\u3068\u540c\u3058\u8010\u98df\u6027\u3092\u4fdd\u6301\u3059\u308b\u3002.<\/b> \u4e21\u5408\u91d1\u3068\u3082\u512a\u308c\u305f\u8010\u6027\u3092\u6301\u3064\uff1a<\/p>\n<ul data-path-to-node=\"30\">\n<li>\n<p data-path-to-node=\"30,0,0\">\u6d77\u6c34\u3068\u6d77\u6d0b\u74b0\u5883\u3002.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"30,1,0\">\u5b54\u98df\u3068\u9699\u9593\u8150\u98df\u3002.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"30,2,0\">\u786b\u5316\u7269\u5fdc\u529b\u5272\u308c\uff08SSC\uff09\u3002.<\/p>\n<\/li>\n<\/ul>\n<p data-path-to-node=\"31\">625\u306e\u8010\u98df\u6027\u3068718\u306e\u5f37\u5ea6\u3092\u4f75\u305b\u6301\u3064\u3002.<\/p>\n<h2>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30b7\u30ca\u30ea\u30aa\u3044\u3064\u4f7f\u3046\uff1f<\/h2>\n<p data-path-to-node=\"33\">\u3053\u308c\u3089\u306e\u3069\u3061\u3089\u3092\u9078\u3076\u304b\u306f\u3001\u901a\u5e38\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u6a5f\u68b0\u7684\u8ca0\u8377\u306b\u3088\u308b\u3002.<\/p>\n<p data-path-to-node=\"34\"><b>\u30a2\u30ed\u30a4625\u3092\u9078\u3076\u306a\u3089<\/b><\/p>\n<ul data-path-to-node=\"35\">\n<li>\n<p data-path-to-node=\"35,0,0\">\u512a\u308c\u305f\u52a0\u5de5\u6027\u3068\u6eb6\u63a5\u6027\u304c\u5fc5\u8981\u3060\u3002.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"35,1,0\">\u3053\u306e\u7528\u9014\u306b\u306f\u3001\u6392\u6c17\u30c0\u30af\u30c8\u306e\u3088\u3046\u306a\u30af\u30e9\u30c3\u30c9\uff08\u91cd\u306d\u5f35\u308a\uff09\u3084\u30b7\u30fc\u30c8\u30e1\u30bf\u30eb\u90e8\u54c1\u304c\u542b\u307e\u308c\u308b\u3002.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"35,2,0\">\u6975\u7aef\u306a\u964d\u4f0f\u5f37\u5ea6\u306f\u7b2c\u4e00\u306e\u8981\u4ef6\u3067\u306f\u306a\u3044\u3002.<\/p>\n<\/li>\n<\/ul>\n<p data-path-to-node=\"36\"><b>\u30a2\u30ed\u30a4725\u3092\u9078\u3076\u306a\u3089<\/b><\/p>\n<ul data-path-to-node=\"37\">\n<li>\n<p data-path-to-node=\"37,0,0\">\u30b5\u30ef\u30fc\u30ac\u30b9\u30b5\u30fc\u30d3\u30b9\uff08NACE MR0175\uff09\u7528\u306e\u30d5\u30a1\u30b9\u30ca\u30fc\u3001\u30cf\u30f3\u30ac\u30fc\u3001\u307e\u305f\u306f\u30e9\u30f3\u30c7\u30a3\u30f3\u30b0\u30cb\u30c3\u30d7\u30eb\u3092\u8a2d\u8a08\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"37,1,0\">\u6d77\u6d0b\u74b0\u5883\u3067\u306e\u5927\u304d\u306a\u5f15\u5f35\u5fdc\u529b\u306b\u8010\u3048\u308b\u7d20\u6750\u304c\u5fc5\u8981\u3060\u3002.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"37,2,0\">\u3053\u306e\u90e8\u54c1\u306f\u3001\u51b7\u9593\u52a0\u5de5\u304c\u4e0d\u53ef\u80fd\u306a\u5927\u65ad\u9762\u306e\u68d2\u6750\u3084\u935b\u9020\u54c1\u3067\u3042\u308b\u3002.<\/p>\n<\/li>\n<\/ul>\n<p data-path-to-node=\"39\"><img loading=\"lazy\" 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=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<h3>\u3088\u304f\u3042\u308b\u8cea\u554f (FAQ)<\/h3>\n<p data-path-to-node=\"42\"><b>Q1: \u30a2\u30ed\u30a4725\u306f\u30a2\u30ed\u30a4625\u306e\u3088\u3046\u306b\u7c21\u5358\u306b\u6eb6\u63a5\u3067\u304d\u307e\u3059\u304b\uff1f<\/b><\/p>\n<p data-path-to-node=\"42\">\u4e21\u8005\u3068\u3082\u6eb6\u63a5\u306f\u53ef\u80fd\u3067\u3042\u308b\u304c\u3001\u4e00\u822c\u306b\u5408\u91d1625 \u306e\u65b9\u304c\u6eb6\u63a5\u6027\u306b\u512a\u308c\u3001\u6eb6\u52a0\u6750\u3068\u3057\u3066\u4f7f\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3002\u5408\u91d1725\u306f\u6eb6\u63a5\u304c\u53ef\u80fd\u3067\u3042\u308b\u304c\u3001\u6642\u52b9\u786c\u5316\u6027 \u5408\u91d1\u3067\u3042\u308b\u305f\u3081\u3001\u71b1\u5f71\u97ff\u90e8\u306e\u9ad8\u5f37\u5ea6\u7279\u6027\u3092\u56de\u5fa9\u3059\u308b\u305f \u3081\u306b\u306f\u3001\u4e00\u822c\u306b\u6eb6\u63a5\u5f8c\u306e\u71b1\u51e6\u7406\u304c\u5fc5\u8981\u3067\u3042\u308b\u3002.<\/p>\n<p data-path-to-node=\"43\"><b>Q2: \u30a2\u30ed\u30a4725\u306f\u78c1\u6027\u304c\u3042\u308a\u307e\u3059\u304b\uff1f<\/b><\/p>\n<p data-path-to-node=\"43\">\u5408\u91d1725\u306f\u3001\u5408\u91d1625\u3068\u540c\u69d8\u306b\u30cb\u30c3\u30b1\u30eb\u57fa\u8d85\u5408\u91d1 \u3067\u3042\u308a\u3001\u3042\u3089\u3086\u308b\u6761\u4ef6\u4e0b\u3067\u975e\u78c1\u6027\u3067\u3042\u308b\u3002\u3053\u306e\u305f\u3081\u3001\u4e21\u5408\u91d1\u306f\u3001\u7e4a\u7d30\u306a\u96fb\u5b50\u7b50\u4f53\u3084\u6d77\u5e95\u90e8\u54c1\u306a\u3069\u3001\u900f\u78c1\u7387\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u7528\u9014\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n<p data-path-to-node=\"44\"><b>Q3: \u306a\u305c\u5408\u91d1725\u306f625\u3088\u308a\u9ad8\u3044\u306e\u3067\u3059\u304b\uff1f<\/b><\/p>\n<p data-path-to-node=\"44\">\u30b3\u30b9\u30c8\u306e\u9055\u3044\u306f\u3001\u52a0\u5de5\u306e\u8907\u96d1\u3055\u306b\u8d77\u56e0\u3059\u308b\u3002\u539f\u6599\u30b3\u30b9\u30c8\u306f\u540c\u7a0b\u5ea6\u3067\u3042\u308b\u304c\u3001\u5408\u91d1725\u306f\u305d\u306e\u6a5f\u68b0\u7684\u7279\u6027\u3092\u5f97\u308b\u305f\u3081\u306b\u7cbe\u5bc6\u306a\u771f\u7a7a\u6eb6\u89e3\u3068\u9577\u6642\u9593\u306e\u71b1\u51e6\u7406\u30b5\u30a4\u30af\u30eb\uff08\u6eb6\u4f53\u5316\u51e6\u7406\u30682\u6bb5\u968e\u306e\u6642\u52b9\u51e6\u7406\uff09\u3092\u5fc5\u8981\u3068\u3059\u308b\u3002\u52a0\u3048\u3066\u3001Alloy 625\u306f\u306f\u308b\u304b\u306b\u5927\u91cf\u306b\u751f\u7523\u3055\u308c\u308b\u305f\u3081\u3001\u898f\u6a21\u306e\u7d4c\u6e08\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/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 N07725) is essentially Alloy 625 with a specific modification. Metallurgists took the proven corrosion-resistant base of 625 and added small, precise amounts of Titanium (Ti) and Aluminum (Al). Alloy 625: Strengthened primarily by the stiffening effect of molybdenum and niobium in the nickel-chromium matrix (Solid Solution Strengthening). Alloy 725: Strengthened by the precipitation of microscopic [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1754,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1753","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/1753","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=1753"}],"version-history":[{"count":2,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/1753\/revisions"}],"predecessor-version":[{"id":2555,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/1753\/revisions\/2555"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/media\/1754"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/media?parent=1753"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/categories?post=1753"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/tags?post=1753"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}