{"id":2809,"date":"2026-03-10T04:08:07","date_gmt":"2026-03-10T03:08:07","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=2809"},"modified":"2026-03-10T04:08:14","modified_gmt":"2026-03-10T03:08:14","slug":"nickel-alloy-selection-for-heat-exchanger","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/ja\/nickel-alloy-selection-for-heat-exchanger\/","title":{"rendered":"\u71b1\u4ea4\u63db\u5668\u8150\u98df\u5264\u7528\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u9078\u629e"},"content":{"rendered":"<p data-path-to-node=\"2\">\u51b6\u91d1\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u91cd\u8981\u306a\u71b1\u4ea4\u63db\u30b7\u30b9\u30c6\u30e0\u3092\u8a2d\u8a08\u3059 \u308b\u5834\u5408\u3001\u71b1\u4ea4\u63db\u5668\u7528\u306e\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u3092\u6b63\u78ba\u306b\u9078\u629e\u3059\u308b\u3053 \u3068\u304c\u3001\u81f4\u547d\u7684\u306a\u6545\u969c\u306b\u5bfe\u3059\u308b\u7b2c\u4e00\u306e\u9632\u5fa1\u7b56\u3068\u306a\u308a\u307e\u3059\u3002\u8150\u98df\u6027\u306e\u5f37\u3044\u30cf\u30ed\u30b2\u30f3\u5316\u7269\u3001\u9ad8\u6e29\u3001\u5909 \u52d5\u3059\u308b\u6d41\u4f53\u529b\u5b66\u3092\u4f34\u3046\u51e6\u7406\u74b0\u5883\u306f\u3001\u6750\u6599\u306e \u5f31\u70b9\u3092\u6025\u901f\u306b\u7a81\u304d\u307e\u3059\u3002\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u7cfb\u30b9\u30c6\u30f3\u30ec \u30b9\u92fc\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u6761\u4ef6\u4e0b\u3067\u5869\u5316\u7269\u5fdc\u529b\u8150\u98df\u5272\u308c (CSCC)\u3084\u6df1\u523b\u306a\u5c40\u90e8\u7684\u5b54\u98df\u306b\u898b\u821e\u308f\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3002\u5f93\u3063\u3066\u3001\u9ad8\u6027\u80fd\u6750\u6599\u3078\u306e\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u306f\u3001\u5358\u306a\u308b\u30aa\u30d7 \u30b7\u30e7\u30f3\u3067\u306f\u306a\u304f\u3001\u904b\u8ee2\u306e\u5b8c\u5168\u6027\u3092\u7dad\u6301\u3057\u3001\u4e88\u5b9a\u5916\u306e \u8a2d\u5099\u30c0\u30a6\u30f3\u30bf\u30a4\u30e0\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306b\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u4e0a\u5fc5 \u8981\u306a\u3053\u3068\u3067\u3042\u308b\u3002.<\/p>\n<p data-path-to-node=\"3\">\u71b1\u4ea4\u63db\u5668\u8a2d\u8a08\u306b\u304a\u3051\u308b\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u9078\u5b9a\u306e\u57fa\u672c\u306f\u3001\u30b7\u30a7\u30eb\u5074\u3068\u30c1\u30e5\u30fc\u30d6\u5074\u306e\u4e21\u65b9\u306b\u5b58\u5728\u3059\u308b\u7279\u5b9a\u306e\u8150\u98df\u5a92\u4f53\u3092\u6df1\u304f\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4e3b\u306b\u5b54\u98df\u3084\u9699\u9593\u8150\u98df\u306a\u3069\u306e\u5c40\u90e8\u7684\u306a\u8150\u98df\u30e1\u30ab\u30cb\u30ba\u30e0\u304c\u3001\u9ad8\u6fc3\u5ea6\u306e\u30e2\u30ea\u30d6\u30c7\u30f3\u3084\u7a92\u7d20\u306e\u6dfb\u52a0\u306e\u5fc5\u8981\u6027\u3092\u898f\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u5c40\u90e8\u7684\u306a\u5869\u5316\u7269\u6fc3\u5ea6\u304c\u4e0a\u6607\u3059\u308b\u3068\uff08\u591a\u304f\u306e\u5834\u5408\u3001\u5806\u7a4d\u4e0d\u8db3\u8150\u98df\u3084\u7ba1\u3068\u7ba1\u306e\u63a5\u5408\u90e8\u306e\u6ede\u7559\u6d41\u5e2f\u304c\u539f\u56e0\uff09\u3001\u4fdd\u8b77\u4e0d\u52d5\u614b\u9178\u5316\u7269\u5c64\u304c\u52a3\u5316\u3059\u308b\u3002.<\/p>\n<p data-path-to-node=\"4\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-2810\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/183.jpg\" alt=\"\u71b1\u4ea4\u63db\u5668\u8150\u98df\u5264\u7528\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u9078\u629e\" width=\"1200\" height=\"896\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/183.jpg 1200w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/183-300x224.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/183-1024x765.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/183-768x573.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/183-16x12.jpg 16w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p data-path-to-node=\"5\">To quantify a material&#8217;s resistance to these localized attacks, engineers rely on the Pitting Resistance Equivalent Number (PREN). The formula, generally expressed as %Cr + 3.3(%Mo) + 16(%N), provides a reliable comparative metric. Advanced nickel alloy selection for heat exchanger networks heavily weights this data. For instance, while Alloy 400 performs exceptionally well in hydrofluoric acid environments due to its high copper content, its lack of molybdenum makes it unsuitable for oxidizing chloride environments. Conversely, Alloy C-276, containing roughly 16% molybdenum, offers exceptional resistance to a wide range of aggressive chemicals, including wet chlorine gas and hypochlorite solutions.<\/p>\n<p data-path-to-node=\"6\">\u4ee5\u4e0b\u306f\u3001\u4e00\u822c\u7684\u306a\u71b1\u4ea4\u63db\u5668\u7528\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u3068\u76f8\u30c7\u30fc\u30bf\u306e\u6280\u8853\u6bd4\u8f03\u3067\u3059\uff1a<\/p>\n<table data-path-to-node=\"7\">\n<thead>\n<tr>\n<td><strong>\u5408\u91d1\u30b0\u30ec\u30fc\u30c9<\/strong><\/td>\n<td><strong>UNS\u6307\u5b9a<\/strong><\/td>\n<td><strong>Cr (%)<\/strong><\/td>\n<td><strong>\u30e2\u30ea\u30d6\u30c7\u30f3 (%)<\/strong><\/td>\n<td><strong>\u30cb\u30c3\u30b1\u30eb\uff08%\uff09<\/strong><\/td>\n<td><strong>\u4ee3\u8868\u7684\u306aPREN<\/strong><\/td>\n<td><strong>\u4e3b\u306a\u7528\u9014<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"7,1,0,0\">\u30a2\u30ed\u30a4400<\/span><\/td>\n<td><span data-path-to-node=\"7,1,1,0\">N04400<\/span><\/td>\n<td><span data-path-to-node=\"7,1,2,0\">&#8211;<\/span><\/td>\n<td><span data-path-to-node=\"7,1,3,0\">&#8211;<\/span><\/td>\n<td><span data-path-to-node=\"7,1,4,0\">63.0\u5206<\/span><\/td>\n<td><span data-path-to-node=\"7,1,5,0\">\u8a72\u5f53\u306a\u3057<\/span><\/td>\n<td><span data-path-to-node=\"7,1,6,0\">\u9084\u5143\u6027\u74b0\u5883\u3001HF\u9178\u3001\u6d77\u6d0b<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,2,0,0\">\u30a2\u30ed\u30a4600<\/span><\/td>\n<td><span data-path-to-node=\"7,2,1,0\">N06600<\/span><\/td>\n<td><span data-path-to-node=\"7,2,2,0\">14.0-17.0<\/span><\/td>\n<td><span data-path-to-node=\"7,2,3,0\">&#8211;<\/span><\/td>\n<td><span data-path-to-node=\"7,2,4,0\">72.0\u5206<\/span><\/td>\n<td><span data-path-to-node=\"7,2,5,0\">~15<\/span><\/td>\n<td><span data-path-to-node=\"7,2,6,0\">\u9ad8\u6e29\u9178\u5316\u3001\u82db\u6027\u6eb6\u6db2<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,3,0,0\">\u30a2\u30ed\u30a4625<\/span><\/td>\n<td><span data-path-to-node=\"7,3,1,0\">N06625<\/span><\/td>\n<td><span data-path-to-node=\"7,3,2,0\">20.0-23.0<\/span><\/td>\n<td><span data-path-to-node=\"7,3,3,0\">8.0-10.0<\/span><\/td>\n<td><span data-path-to-node=\"7,3,4,0\">58.0\u5206<\/span><\/td>\n<td><span data-path-to-node=\"7,3,5,0\">~50<\/span><\/td>\n<td><span data-path-to-node=\"7,3,6,0\">\u6d77\u6c34\u3001\u9ad8\u30b9\u30c8\u30ec\u30b9\u74b0\u5883<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"7,4,0,0\">\u5408\u91d1C-276<\/span><\/td>\n<td><span data-path-to-node=\"7,4,1,0\">N10276<\/span><\/td>\n<td><span data-path-to-node=\"7,4,2,0\">14.5-16.5<\/span><\/td>\n<td><span data-path-to-node=\"7,4,3,0\">15.0-17.0<\/span><\/td>\n<td><span data-path-to-node=\"7,4,4,0\">\u30d0\u30e9\u30f3\u30b9<\/span><\/td>\n<td><span data-path-to-node=\"7,4,5,0\">~68<\/span><\/td>\n<td><span data-path-to-node=\"7,4,6,0\">\u91cd\u5ea6\u306e\u9178\u5316\u6027\u304a\u3088\u3073\u9084\u5143\u6027\u5869\u5316\u7269<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p data-path-to-node=\"8\">\u71b1\u4ea4\u63db\u5668\u7528\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u9078\u5b9a\u3067\u3088\u304f\u898b\u843d\u3068\u3055\u308c\u308b \u306e\u306f\u3001\u9ad8\u6e29\u3067\u306e\u76f8\u5b89\u5b9a\u6027\u3001\u7279\u306b\u88fd\u9020\u5de5\u7a0b\u3067\u306e\u76f8\u5b89\u5b9a \u6027\u3092\u8003\u616e\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3067\u3059\u3002\u6bcd\u6750\u304c\u7406\u60f3\u7684\u306aPREN\u3092\u6709\u3057\u3066\u3044\u3066\u3082\u3001 \u6eb6\u63a5\u4e2d\u306e\u71b1\u30b5\u30a4\u30af\u30eb\u306b\u3088\u3063\u3066\u91d1\u5c5e\u9593\u76f8\u304c\u6790\u51fa \u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u5408\u91d1C-276\u3084\u5408\u91d1625 \u306e\u3088\u3046\u306a\u9ad8\u30e2\u30ea\u30d6\u30c7\u30f3\u92fc\u7a2e\u306f\u3001\u6709\u5bb3 \u306aTCP(topologically close-packed)\u76f8\u3001\u4f8b\u3048\u3070mu(<span class=\"math-inline\" data-math=\"\\mu\" data-index-in-node=\"478\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">\u03bc<\/span><\/span><\/span><\/span><\/span>)\u3068\u30b7\u30b0\u30de(<span class=\"math-inline\" data-math=\"\\sigma\" data-index-in-node=\"494\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">\u03c3<\/span><\/span><\/span><\/span><\/span>)\u76f8\u3067\u3001650\u2103\u304b\u30891000\u2103\u306e\u6e29\u5ea6\u306b\u3055\u3089\u3055\u308c\u305f\u3002.<\/p>\n<p data-path-to-node=\"9\">\u3053\u308c\u3089\u306e\u91d1\u5c5e\u9593\u6790\u51fa\u7269\u306f\u3001\u96a3\u63a5\u3059\u308b\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u306e\u8010\u98df\u6027\u5143\u7d20\u3092\u8457\u3057\u304f\u6e1b\u5c11\u3055\u305b\u3001\u71b1\u5f71\u97ff\u90e8(HAZ)\u3067\u306e\u92ed\u654f\u5316\u3092\u3082\u305f\u3089\u3059\u3002\u3055\u3089\u306b\u3001TCP\u76f8\u306f\u5c40\u6240\u7684\u306a\u8106\u6027\u3092\u5897\u5927\u3055\u305b\u3001\u5727\u529b\u5bb9\u5668\u306e\u6a5f\u68b0\u7684\u5b8c\u5168\u6027\u3092\u4f4e\u4e0b\u3055\u305b\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u71b1\u4ea4\u63db\u5668\u88fd\u9020\u306e\u305f\u3081\u306e\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u9078\u5b9a\u306e\u59a5\u5f53\u6027\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3001\u6642\u9593-\u6e29\u5ea6-\u5909\u614b(TTT)\u66f2\u7dda\u3092\u53b3\u5bc6\u306b\u691c\u8a0e\u3057\u3001\u6790\u51fa\u52d5\u614b\u3092\u6291\u5236\u3059\u308b\u305f\u3081\u306b\u9069\u5207\u306a\u4f4e\u5165\u71b1\u6eb6\u63a5\u624b\u9806\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<p data-path-to-node=\"10\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-2811\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/184.jpg\" alt=\"\u71b1\u4ea4\u63db\u5668\u8150\u98df\u5264\u7528\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u9078\u629e\" width=\"1200\" height=\"896\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/184.jpg 1200w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/184-300x224.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/184-1024x765.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/184-768x573.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/184-16x12.jpg 16w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p data-path-to-node=\"11\">\u8150\u98df\u30d1\u30e9\u30e1\u30fc\u30bf\u3060\u3051\u3067\u306a\u304f\u3001\u69cb\u9020\u529b\u5b66\u3082\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3059\u3002\u30b7\u30a7\u30eb\u3068\u30c1\u30e5\u30fc\u30d6\u304c\u7570\u7a2e\u91d1\u5c5e\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u71b1\u81a8\u5f35\u4fc2\u6570\uff08CTE\uff09\u3092\u614e\u91cd\u306b\u5408\u308f\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u81a8\u5f35\u3068\u53ce\u7e2e\u306e\u7e70\u308a\u8fd4\u3057\u306b\u3088\u308b\u71b1\u75b2\u52b4\u306f\u3001\u30d0\u30c3\u30d5\u30eb\u3068\u30c1\u30e5\u30fc\u30d6\u3068\u30c1\u30e5\u30fc\u30d6\u306e\u6eb6\u63a5\u90e8\u306b\u5fdc\u529b\u96c6\u4e2d\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u70ad\u7d20\u92fc\u307e\u305f\u306f\u4e8c\u76f8\u92fc\u306e\u30b7\u30a7\u30eb\u3068\u9069\u5408\u3059\u308b CTE\u3092\u6301\u3064\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u3092\u9078\u629e\u3059\u308b\u3068\u3001\u3053\u306e\u3088\u3046 \u306a\u305b\u3093\u65ad\u5fdc\u529b\u304c\u6700\u5c0f\u9650\u306b\u6291\u3048\u3089\u308c\u308b\u305f\u3081\u3001\u30b5\u30fc\u30de \u30eb\u30e6\u30cb\u30c3\u30c8\u5168\u4f53\u306e\u6a5f\u68b0\u75b2\u52b4\u5bff\u547d\u304c\u5ef6\u3073\u307e\u3059\u3002.<\/p>\n<p data-path-to-node=\"12\">\u7d50\u5c40\u306e\u3068\u3053\u308d\u3001\u71b1\u4ea4\u63db\u5668\u3092\u9577\u5bff\u547d\u5316\u3059\u308b\u305f\u3081\u306e\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u9078 \u629e\u306f\u3001\u5f53\u3066\u305a\u3063\u307d\u3046\u306e\u4f5c\u696d\u3067\u306f\u306a\u304f\u3001\u5c40\u90e8\u8150\u98df\u30c7\u30fc\u30bf\u3001\u76f8\u5b89\u5b9a 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Processing environments involving aggressive halides, elevated temperatures, and variable flow dynamics rapidly exploit any material weakness. Austenitic stainless steels often succumb to chloride stress corrosion cracking (CSCC) or severe localized pitting under these conditions. Consequently, upgrading to high-performance materials is not merely an option, but an engineering necessity to maintain operational integrity and avoid unplanned facility downtime. The baseline of nickel alloy selection for heat exchanger design requires a deep understanding of the specific corrosive media present on both the shell and tube sides. 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