{"id":2796,"date":"2026-03-09T04:31:10","date_gmt":"2026-03-09T03:31:10","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=2796"},"modified":"2026-03-09T04:31:19","modified_gmt":"2026-03-09T03:31:19","slug":"nickel-alloy-selection-for-chemical-processing","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/ja\/nickel-alloy-selection-for-chemical-processing\/","title":{"rendered":"\u5316\u5b66\u51e6\u7406\u30bf\u30f3\u30af\u7528\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u9078\u629e"},"content":{"rendered":"<p data-path-to-node=\"2\">Chemical plants operate in exceptionally harsh environments. Pitting, crevice corrosion, and stress corrosion cracking (SCC) are constant threats to continuous operation. When dealing with aggressive media like boiling sulfuric acid or hot chloride solutions, standard austenitic stainless steels simply fail. This is exactly where precise nickel alloy selection for chemical processing becomes a critical engineering mandate. Getting this right dictates the lifecycle of a reactor vessel. The presence of halide ions severely complicates materials specification. We often see localized attack initiating at grain boundaries or beneath deposits. Effective nickel alloy selection for chemical processing in these scenarios hinges on the Pitting Resistance Equivalent Number (PREN). Alloys rich in molybdenum and tungsten, such as Hastelloy C-276 (UNS N10276), provide exceptional resistance. Molybdenum stabilizes the passive film against chloride ion penetration. Conversely, if the environment is purely reducing, such as dry hydrogen chloride, Alloy 400 (UNS N04400) leveraging its high copper content demonstrates superior thermodynamic stability. The variance in degradation mechanisms means nickel alloy selection for chemical processing cannot be handled via generic datasheets. It requires rigorous analysis of the specific ionic species, temperature gradients, and flow velocities within the process stream.<\/p>\n<p data-path-to-node=\"3\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2797\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/177.jpg\" alt=\"\u5316\u5b66\u51e6\u7406\u30bf\u30f3\u30af\u7528\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u9078\u629e\" width=\"1200\" height=\"896\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/177.jpg 1200w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/177-300x224.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/177-1024x765.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/177-768x573.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/177-16x12.jpg 16w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<h2 data-path-to-node=\"4\">\u5408\u91d1\u9078\u629e\u306b\u304a\u3051\u308b\u51b6\u91d1\u5b66\u7684\u5909\u5316<\/h2>\n<p data-path-to-node=\"5\">\u3053\u308c\u3089\u306e\u9078\u629e\u3092\u6c7a\u5b9a\u3057\u3066\u3044\u308b\u57fa\u672c\u7684\u306a\u5316\u5b66\u7684\u6027\u8cea \u3092\u898b\u3066\u307f\u3088\u3046\u3002\u9ad8\u3044\u30cb\u30c3\u30b1\u30eb\u542b\u6709\u91cf\u306f\u3001300\u7cfb\u30b9\u30c6\u30f3\u30ec \u30b9\u92fc\u306e\u5f31\u70b9\u3068\u3057\u3066\u77e5\u3089\u308c\u308b\u5869\u5316\u7269\u5fdc\u529b\u8150\u98df \u5272\u308c\u3092\u76f4\u63a5\u6291\u5236\u3059\u308b\u3002\u30af\u30ed\u30e0\u3092\u8abf\u6574\u3059\u308b\u3053\u3068\u3067\u3001\u785d\u9178\u306a \u3069\u306e\u9178\u5316\u5264\u306b\u5bfe\u3059\u308b\u8010\u6027\u304c\u5411\u4e0a\u3059\u308b\u3002\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u306e\u5b89\u5b9a\u6027\u304c\u6700\u3082\u91cd\u8981\u3067 \u3042\u308b\u3002\u5316\u5b66\u51e6\u7406\u7528\u306e\u4e0d\u9069\u5207\u306a\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u9078\u629e\u306f\u3001\u5fae\u91cf \u306e\u6c5a\u67d3\u7269\u8cea\u3092\u7121\u8996\u3059\u308b\u3053\u3068\u306b\u8d77\u56e0\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3002\u5869\u9178\u306e\u6d41\u308c\u306b\u542b\u307e\u308c\u308b\u5fae\u91cf\u306e\u7b2c\u4e8c\u9244\u30a4\u30aa\u30f3\u306f\u3001\u77ac\u6642\u306b\u74b0\u5883\u3092\u9084\u5143\u6027\u304b\u3089\u9178\u5316\u6027\u3078\u3068\u5909\u5316\u3055\u305b\u3001\u305d\u308c\u307e\u3067\u6307\u5b9a\u3055\u308c\u3066\u3044\u305f\u30e2\u30ea\u30d6\u30c7\u30f3\u591a\u7528\u5408\u91d1\u3092\u7a81\u7136\u8106\u5f31\u306b\u3057\u307e\u3059\u3002.<\/p>\n<table data-path-to-node=\"6\">\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>\u30cb\u30c3\u30b1\u30eb\uff08%\uff09<\/strong><\/td>\n<td><strong>Cr (%)<\/strong><\/td>\n<td><strong>\u30e2\u30ea\u30d6\u30c7\u30f3 (%)<\/strong><\/td>\n<td><strong>PREN\uff08\u7d04\uff09<\/strong><\/td>\n<td><strong>\u4e3b\u306a\u74b0\u5883\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"6,1,0,0\">\u5408\u91d1C-276<\/span><\/td>\n<td><span data-path-to-node=\"6,1,1,0\">N10276<\/span><\/td>\n<td><span data-path-to-node=\"6,1,2,0\">57.0<\/span><\/td>\n<td><span data-path-to-node=\"6,1,3,0\">16.0<\/span><\/td>\n<td><span data-path-to-node=\"6,1,4,0\">16.0<\/span><\/td>\n<td><span data-path-to-node=\"6,1,5,0\">&gt; 45<\/span><\/td>\n<td><span data-path-to-node=\"6,1,6,0\">\u91cd\u5ea6\u306e\u6df7\u5408\u9178\u3001\u6c5a\u67d3\u5869\u5316\u7269<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"6,2,0,0\">\u30a2\u30ed\u30a4625<\/span><\/td>\n<td><span data-path-to-node=\"6,2,1,0\">N06625<\/span><\/td>\n<td><span data-path-to-node=\"6,2,2,0\">58.0<\/span><\/td>\n<td><span data-path-to-node=\"6,2,3,0\">21.0<\/span><\/td>\n<td><span data-path-to-node=\"6,2,4,0\">9.0<\/span><\/td>\n<td><span data-path-to-node=\"6,2,5,0\">~ 40<\/span><\/td>\n<td><span data-path-to-node=\"6,2,6,0\">\u5b54\u98df\u30fb\u9699\u9593\u8150\u98df\u74b0\u5883<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"6,3,0,0\">\u30a2\u30ed\u30a4825<\/span><\/td>\n<td><span data-path-to-node=\"6,3,1,0\">N08825<\/span><\/td>\n<td><span data-path-to-node=\"6,3,2,0\">42.0<\/span><\/td>\n<td><span data-path-to-node=\"6,3,3,0\">21.5<\/span><\/td>\n<td><span data-path-to-node=\"6,3,4,0\">3.0<\/span><\/td>\n<td><span data-path-to-node=\"6,3,5,0\">~ 31<\/span><\/td>\n<td><span data-path-to-node=\"6,3,6,0\">\u786b\u9178\u304a\u3088\u3073\u30ea\u30f3\u9178\u306e\u53d6\u308a\u6271\u3044<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"6,4,0,0\">\u30a2\u30ed\u30a4400<\/span><\/td>\n<td><span data-path-to-node=\"6,4,1,0\">N04400<\/span><\/td>\n<td><span data-path-to-node=\"6,4,2,0\">63.0<\/span><\/td>\n<td><span data-path-to-node=\"6,4,3,0\">&#8211;<\/span><\/td>\n<td><span data-path-to-node=\"6,4,4,0\">&#8211;<\/span><\/td>\n<td><span data-path-to-node=\"6,4,5,0\">\u8a72\u5f53\u306a\u3057<\/span><\/td>\n<td><span data-path-to-node=\"6,4,6,0\">\u30d5\u30c3\u5316\u6c34\u7d20\u9178\u3068\u8131\u6c17\u5869\u6c34<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 data-path-to-node=\"7\">\u9ad8\u6e29\u52a3\u5316\u30e2\u30fc\u30c9<\/h2>\n<p data-path-to-node=\"8\">\u6c34\u7cfb\u8150\u98df\u306b\u3068\u3069\u307e\u3089\u305a\u3001\u9ad8\u6e29\u30ac\u30b9\u53cd\u5fdc\u3082\u307e\u305f\u8907\u96d1\u306a\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u3002\u9178\u5316\u3001\u786b\u5316\u3001\u6d78\u70ad\u306f\u3001\u6a5f\u68b0\u7684\u5b8c\u5168\u6027\u3092\u6025\u901f\u306b\u52a3\u5316\u3055\u305b\u308b\u3002\u71b1\u5206\u89e3\u7089\u3084\u89e6\u5a92\u518d\u751f\u7089\u306e\u5185\u90e8\u69cb\u9020\u3092\u8a2d\u8a08\u3059\u308b\u5834 \u5408\u3001\u5316\u5b66\u51e6\u7406\u7528\u306e\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u9078\u629e\u306f\u3001\u70ad\u5316\u7269 \u5f62\u6210\u5264\u3068\u30a2\u30eb\u30df\u30ca\u307e\u305f\u306f\u30af\u30ed\u30df\u30a2\u306e\u30b9\u30b1\u30fc\u30eb\u5b89\u5b9a\u5316\u306b \u7126\u70b9\u3092\u79fb\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u5408\u91d1600 (UNS N06600)\u306f\u3001540\u2103\u307e \u3067\u306e\u9ad8\u6e29\u306e\u4e7e\u71e5\u5869\u7d20\u4e2d\u3067\u512a\u308c\u305f\u6027\u80fd\u3092\u767a\u63ee\u3059 \u308b\u304c\u3001\u786b\u9ec4\u7a2e\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u306b\u306f\u786b\u5316\u306e\u30ea \u30b9\u30af\u304c\u751f\u3058\u308b\u3002\u3053\u306e\u3088\u3046\u306a\u6df7\u5408\u30ac\u30b9\u74b0\u5883\u3067\u306f\u3001\u30af\u30ed\u30e0\u3068\u30a2\u30eb\u30df\u30cb\u30a6\u30e0\u306e\u6b63\u78ba\u306a\u30d0\u30e9\u30f3\u30b9\u304c\u6c7a\u3081\u624b\u3068\u306a\u308b\u3002.<\/p>\n<h3 data-path-to-node=\"9\">\u30d5\u30a1\u30d6\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5f71\u97ff<\/h3>\n<p data-path-to-node=\"10\">\u5316\u5b66\u51e6\u7406\u6226\u7565\u306e\u305f\u3081\u306b\u6700\u3082\u53b3\u5bc6\u306b\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u3092\u9078 \u629e\u3057\u3066\u3082\u3001\u4e0d\u9069\u5207\u306a\u52a0\u5de5\u6280\u8853\u306b\u3088\u3063\u3066\u3059\u3079\u3066\u304c\u53f0\u7121\u3057 \u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u6eb6\u63a5\u306f\u5927\u304d\u306a\u71b1\u52fe\u914d\u3092\u3082\u305f\u3089\u3057\u3001\u4e8c\u6b21\u76f8\u304c\u6790\u51fa\u3059\u308b\u71b1\u5f71\u97ff\u90e8(HAZ)\u3092\u5f62\u6210\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u7c92\u754c\u306b\u30df\u30e5\u30fc\u76f8\u3084\u6709\u5bb3\u306a\u70ad\u5316\u7269 \u304c\u6790\u51fa\u3059\u308b\u3068\u3001\u5c40\u90e8\u7684\u306a\u8010\u98df\u6027\u304c\u5927\u5e45\u306b\u4f4e\u4e0b \u3059\u308b\u3002\u5f93\u3063\u3066\u3001\u6bcd\u6750\u306b\u6bd4\u3079\u3066\u904e\u5270\u5408\u91d1\u306b\u306a\u308a\u304c\u3061\u306a\u30d5\u30a3\u30e9\u30fc\u30e1\u30bf\u30eb\u3092\u9069\u5207\u306b\u6307\u5b9a\u3059\u308b\u3053\u3068\u306f\u3001\u4e3b\u8981\u306a\u4ed5\u69d8\u3068\u540c\u69d8\u306b\u6975\u3081\u3066\u91cd\u8981\u3067\u3042\u308b\u3002\u79c1\u305f\u3061\u306f\u3001\u5236\u5fa1\u3055\u308c\u305f\u5165\u71b1\u3068\u3001\u5fc5\u8981 \u306a\u5834\u5408\u306b\u306f\u6eb6\u63a5\u5f8c\u71b1\u51e6\u7406(PWHT)\u3067\u5fae\u7d30\u69cb\u9020\u306e \u5747\u8cea\u6027\u3092\u56de\u5fa9\u3059\u308b\u3053\u3068\u3092\u5f37\u304f\u63d0\u5531\u3057\u3066\u3044\u308b\u3002\u6280\u8853\u8005\u306f\u3001\u6eb6\u878d\u90e8\u306e\u8106\u5f31\u6027\u3092\u9632\u3050\u305f\u3081\u306b\u3001\u5316\u5b66\u51e6 \u7406\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u7528\u306e\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u521d\u671f\u6bb5\u968e\u306e\u9078 \u629e\u306b\u88fd\u9020\u4e0a\u306e\u5236\u7d04\u3092\u7d44\u307f\u8fbc\u3080\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<p data-path-to-node=\"11\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2798\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/178.jpg\" alt=\"\u5316\u5b66\u51e6\u7406\u30bf\u30f3\u30af\u7528\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u9078\u629e\" width=\"1200\" height=\"896\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/178.jpg 1200w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/178-300x224.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/178-1024x765.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/178-768x573.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/178-16x12.jpg 16w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<h2 data-path-to-node=\"12\">\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u306b\u3088\u308b\u4fe1\u983c\u6027\u306e\u6700\u9069\u5316<\/h2>\n<p data-path-to-node=\"13\">\u6750\u6599\u30a8\u30f3\u30b8\u30cb\u30a2\u3068\u3057\u3066\u3001\u79c1\u305f\u3061\u306f\u7d4c\u9a13\u7684\u30c7\u30fc\u30bf\u3001\u53b3\u5bc6\u306a\u8a66\u9a13\u3001\u6b63\u78ba\u306a\u30d7\u30ed\u30bb\u30b9\u30e2\u30c7\u30ea\u30f3\u30b0\u306b\u983c\u3089\u3056\u308b\u3092\u5f97\u307e\u305b\u3093\u3002\u4ed5\u69d8\u306e\u8aa4\u7b97\u306b\u3088\u308b\u7d4c\u6e08\u7684\u30da\u30ca\u30eb\u30c6\u30a3\u306f\u58ca\u6ec5\u7684\u3067\u3042\u308a\u3001\u305d\u306e\u7d50\u679c\u3001\u4e88\u5b9a\u5916\u306e\u904b\u8ee2\u505c\u6b62\u3084\u91cd\u5927\u306a\u5b89\u5168\u4e0a\u306e\u5371\u967a\u304c\u751f\u3058\u308b\u3002\u6b63\u78ba\u306a\u30d7\u30ed\u30bb\u30b9\u6d41\u4f53\u306e\u71b1\u529b\u5b66\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u7d50\u5c40\u306e\u3068\u3053\u308d\u3001\u5316\u5b66\u51e6\u7406\u306b\u6700\u9069\u306a\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u9078\u629e\u3068\u306f\u3001\u5358\u306b\u6700\u3082\u8010\u98df\u6027\u306e\u9ad8\u3044\u6750\u6599\u3092\u898b\u3064\u3051\u308b\u3053\u3068\u3067\u306f\u306a\u304f\u3001\u5927\u898f\u6a21\u306a\u30aa\u30fc\u30d0\u30fc\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u3092\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u4e88\u6e2c\u53ef\u80fd\u306a\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3059\u308b\u6b63\u78ba\u306a\u51b6\u91d1\u5b66\u7684\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u898b\u3064\u3051\u308b\u3053\u3068\u306a\u306e\u3067\u3059\u300228Nickel\u306e\u6750\u6599\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u30c1\u30fc\u30e0\u306f\u3001\u304a\u5ba2\u69d8\u306e\u7279\u5b9a\u306e\u64cd\u4f5c\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u6df1\u304f\u6398\u308a\u4e0b\u3052\u307e\u3059\u3002\u304a\u5ba2\u69d8\u306e\u30a4\u30f3\u30d5\u30e9\u3092\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u6280\u8853\u7684\u691c\u8a3c\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u5f53\u793e\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u90e8\u9580\u306b\u3054\u9023\u7d61\u3044\u305f\u3060\u3051\u308c\u3070\u3001\u304a\u5ba2\u69d8\u306e\u52a3\u5316\u306b\u95a2\u3059\u308b\u6b63\u78ba\u306a\u8ab2\u984c\u3092\u8b70\u8ad6\u3057\u3001\u7b49\u8150\u98df\u30c7\u30fc\u30bf\u3092\u78ba\u8a8d\u3057\u3001\u304a\u5ba2\u69d8\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u304c\u5fc5\u8981\u3068\u3059\u308b\u7684\u3092\u7d5e\u3063\u305f\u6280\u8853\u30b5\u30dd\u30fc\u30c8\u3092\u78ba\u4fdd\u3057\u307e\u3059\u3002.<\/p>\n<p data-path-to-node=\"14\"><b data-path-to-node=\"14\" data-index-in-node=\"0\">\u95a2\u9023Q&amp;A<\/b><\/p>\n<p data-path-to-node=\"15\"><b data-path-to-node=\"15\" data-index-in-node=\"0\">Q1: \u5fae\u91cf\u30d5\u30c3\u7d20\u6c5a\u67d3\u306f\u3001\u5316\u5b66\u51e6\u7406\u7528\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u9078\u629e\u306b\u3069\u306e\u3088\u3046\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u304b\uff1f<\/b><\/p>\n<p data-path-to-node=\"15\"><b data-path-to-node=\"15\" data-index-in-node=\"97\">A:<\/b> \u30d5\u30c3\u5316\u7269\u306f\u3001\u591a\u304f\u306e\u30af\u30ed\u30e0\u542b\u6709\u5408\u91d1\u306e\u4e0d\u52d5\u614b\u9178\u5316 \u5c64\u3092\u7a4d\u6975\u7684\u306b\u653b\u6483\u3059\u308b\u3002\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u3001\u9178\u5316\u7a2e\u304c\u540c\u6642\u306b\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u306b\u3088\u308a\u307e\u3059\u304c\u3001Alloy 400\u306e\u3088\u3046\u306a\u9ad8\u9285\u5408\u91d1\u3084\u3001\u6975\u3081\u3066\u9ad8\u3044\u30e2\u30ea\u30d6\u30c7\u30f3\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002.<\/p>\n<p data-path-to-node=\"16\"><b data-path-to-node=\"16\" data-index-in-node=\"0\">Q2: \u306a\u305cPREN\u5024\u3060\u3051\u3067\u306f\u3001\u5316\u5b66\u51e6\u7406\u7528\u306e\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u9078\u5b9a\u306b\u4e0d\u5341\u5206\u306a\u306e\u3067\u3059\u304b\uff1f<\/b><\/p>\n<p data-path-to-node=\"16\"><b data-path-to-node=\"16\" data-index-in-node=\"97\">A:<\/b> PREN\u304c\u4e88\u6e2c\u3059\u308b\u306e\u306f\u3001\u5e38\u6e29\u307e\u305f\u306f\u4e2d\u7a0b\u5ea6\u306e\u9ad8\u6e29\u3067\u3001\u5869\u5316\u7269\u3092\u591a\u304f\u542b\u3080\u74b0\u5883\u306b\u304a\u3051\u308b\u5c40\u6240\u7684\u306a\u5b54\u98df\u306b\u5bfe\u3059\u308b\u8010\u6027\u306e\u307f\u3067\u3042\u308b\u3002\u9084\u5143\u6027\u9178\u3067\u306e\u4e00\u822c\u7684\u306a\u8150\u98df\u901f\u5ea6\u3001\u5fdc\u529b\u8150\u98df\u5272\u308c\u306e\u30ea\u30b9\u30af\u3001\u9ad8\u6e29\u786b\u5316\u306f\u8003\u616e\u3055\u308c\u3066\u3044\u306a\u3044\u3002.<\/p>\n<p data-path-to-node=\"17\"><b data-path-to-node=\"17\" data-index-in-node=\"0\">Q3: \u5869\u5316\u7269\u5fdc\u529b\u8150\u98df\u5272\u308c\u3092\u9632\u3050\u305f\u3081\u306b\u5fc5\u8981\u306a\u30cb\u30c3\u30b1\u30eb\u306e\u9650\u754c\u95be\u5024\u306f\uff1f<\/b><\/p>\n<p data-path-to-node=\"17\"><b data-path-to-node=\"17\" data-index-in-node=\"101\">A:<\/b> \u7d4c\u9a13\u7684\u30c7\u30fc\u30bf\u306b\u3088\u308b\u3068\u3001\u30cb\u30c3\u30b1\u30eb\u542b\u6709\u91cf\u304c42%\u3092 \u8d85\u3048\u308b\u5408\u91d1(\u4f8b\u3048\u3070\u5408\u91d1825)\u306f\u3001\u5869\u5316\u7269\u8a98\u8d77\u5fdc\u529b\u8150\u98df\u5272 \u308c(SCC)\u306b\u5bfe\u3057\u3066\u6709\u610f\u306a\u8010\u6027\u3092\u793a\u3059\u304c\u3001\u30cb\u30c3\u30b1\u30eb\u542b\u6709\u91cf\u304c 60%\u306b\u8fd1\u3044\u5408\u91d1(\u4f8b\u3048\u3070\u5408\u91d1625)\u306f\u3001\u307b\u3068\u3093\u3069\u306e \u6a19\u6e96\u7684\u306a\u5316\u5b66\u30d7\u30ed\u30bb\u30b9\u306e\u6d41\u308c\u306b\u304a\u3044\u3066\u5b9f\u8cea\u7684\u306b\u8010\u6027\u3092 \u793a\u3059\u3002.<\/p>","protected":false},"excerpt":{"rendered":"<p>Chemical plants operate in exceptionally harsh environments. Pitting, crevice corrosion, and stress corrosion cracking (SCC) are constant threats to continuous operation. When dealing with aggressive media like boiling sulfuric acid or hot chloride solutions, standard austenitic stainless steels simply fail. This is exactly where precise nickel alloy selection for chemical processing becomes a critical engineering mandate. Getting this right dictates the lifecycle of a reactor vessel. The presence of halide ions severely complicates materials specification. We often see localized attack initiating at grain boundaries or beneath deposits. Effective nickel alloy selection for chemical processing in these scenarios hinges on the Pitting Resistance Equivalent Number (PREN). Alloys rich in molybdenum and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2797,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2796","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\/2796","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=2796"}],"version-history":[{"count":1,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2796\/revisions"}],"predecessor-version":[{"id":2799,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2796\/revisions\/2799"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/media\/2797"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/media?parent=2796"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/categories?post=2796"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/tags?post=2796"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}