{"id":2752,"date":"2026-03-05T05:00:25","date_gmt":"2026-03-05T04:00:25","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=2752"},"modified":"2026-03-05T05:00:31","modified_gmt":"2026-03-05T04:00:31","slug":"monel-alloy-chemical-composition","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/ja\/monel-alloy-chemical-composition\/","title":{"rendered":"\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u304c\u91cd\u8981\u306a\u7406\u7531"},"content":{"rendered":"

\u6750\u6599\u5de5\u5b66\u306e\u53b3\u683c\u306a\u5206\u91ce\u3067\u306f\u3001\u30a2\u30eb\u30ad\u30eb\u5316\u88c5\u7f6e\u3001\u6d77\u6d0b\u30b9\u30d7\u30e9\u30c3\u30b7\u30e5\u30be\u30fc\u30f3\u3001\u5316\u5b66\u51e6\u7406\u65bd\u8a2d\u306a\u3069\u3001\u8150\u98df\u6027\u306e\u9ad8\u3044\u74b0\u5883\u306b\u9069\u3057\u305f\u5408\u91d1\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u306f\u3001\u5f53\u3066\u63a8\u91cf\u306e\u4f59\u5730\u304c\u306a\u3044\u3002\u6a19\u6e96\u7684\u306a\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u7cfb\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc\u306f\u3001 \u9084\u5143\u6027\u9178\u306b\u3055\u3089\u3055\u308c\u308b\u3068\u6025\u901f\u306b\u52a3\u5316\u3059\u308b\u3053 \u3068\u304c\u591a\u3044\u3002\u7279\u5b9a\u306e\u30cb\u30c3\u30b1\u30eb-\u9285\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u304c\u512a\u308c\u3066\u3044\u308b \u306e\u306b\u3001\u4ed6\u306e\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u304c\u58ca\u6ec5\u7684\u306b\u52a3\u5316\u3059\u308b\u7406\u7531\u3092 \u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u3092\u6839\u672c\u7684\u306b\u691c\u8a0e\u3059 \u308b\u5fc5\u8981\u304c\u3042\u308b\u3002 \u30e2\u30cd\u30eb\u5408\u91d1\u5316\u5b66\u7d44\u6210<\/b>.<\/p>\n

In my two decades of evaluating metallurgical failures and specifying alloys for severe service conditions, I have consistently found that the secret to this material’s longevity lies not just in its primary elements, but in the precise thermodynamic balance of its micro-alloying additions. The monel alloy chemical composition is engineered to form a single-phase solid solution, granting it exceptional structural stability from sub-zero temperatures up to 480\u00b0C (900\u00b0F).<\/p>\n

\"\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u304c\u91cd\u8981\u306a\u7406\u7531\"<\/p>\n

\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u30d9\u30fc\u30b9\u30e9\u30a4\u30f3\u306e\u89e3\u8aad<\/h3>\n

\u30d9\u30fc\u30b9\u30e9\u30a4\u30f3\u306e\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u3092\u3001\u7279\u306b\u5e83\u304f\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u5408\u91d1400\uff08UNS N04400\uff09\u306b\u7126\u70b9\u3092\u5f53\u3066\u3066\u5206\u6790\u3059\u308b\u3068\u3001\u30cb\u30c3\u30b1\u30eb\uff08\u901a\u5e38\u3001\u6700\u5c0f63%\uff09\u3068\u9285\uff0828%\uff5e34%\uff09\u304c\u652f\u914d\u7684\u306a\u4e8c\u5143\u7cfb\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u6bd4\u7387\u306f\u6063\u610f\u7684\u306a\u3082\u306e\u3067\u306f\u306a\u304f\u3001\u30b5\u30c9\u30d9\u30ea\u76c6\u5730\u306e\u9695\u77f3\u6027\u30cb\u30c3\u30b1\u30eb\u9285\u9271\u306b\u898b\u3089\u308c\u308b\u81ea\u7136\u306e\u7d44\u6210\u3092\u53cd\u6620\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n

Nickel provides the noble matrix that inherently resists chloride-ion stress corrosion cracking (SCC)\u2014a notorious failure mode for 300-series stainless steels in marine and petrochemical applications. Copper is the critical addition that enhances the alloy’s resistance to reducing environments, most notably hydrofluoric acid (HF) and sulfuric acid under non-aerated conditions. In hydrofluoric acid service, the exact monel alloy chemical composition allows the material to form a highly tenacious, protective cupric fluoride film on the surface. If the copper content drops below the specified threshold, or if oxidizing agents are introduced into the process stream, this protective film destabilizes, leading to accelerated localized attack.<\/p>\n

\u3055\u3089\u306b\u3001\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u306b\u542b\u307e\u308c\u308b\u5fae\u91cf\u5143\u7d20\u304c\u3001\u305d\u306e\u88fd\u9020\u6027\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002\u9244\uff08\u6700\u59272.5%\uff09\u3068\u30de\u30f3\u30ac\u30f3\uff08\u6700\u59272.0%\uff09\u306f\u7cbe\u5bc6\u306b\u7ba1\u7406\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30de\u30f3\u30ac\u30f3\u306f\u3001\u6eb6\u89e3\u904e\u7a0b\u3067\u91cd\u8981\u306a\u8131\u9178\u5264\u304a\u3088\u3073\u786b\u9ec4\u6355\u6349\u5264\u3068\u3057\u3066\u4f5c\u7528\u3057\u3001\u71b1\u9593\u77ed\u7d61\u3092\u9632\u6b62\u3057\u3001\u5185\u90e8\u7834\u65ad\u306e\u306a\u3044\u935b\u9020\u304a\u3088\u3073\u5727\u5ef6\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002.<\/p>\n

\u6a19\u6e96\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u30b0\u30ec\u30fc\u30c9\u6bd4\u8f03<\/h3>\n

\u51b6\u91d1\u5b66\u7684\u5dee\u7570\u3092\u3088\u308a\u3088\u304f\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u7570\u306a\u308b\u54c1\u4f4d\u9593\u306e\u5143\u7d20\u9650\u754c\u5024\u3092\u6bd4\u8f03\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
\u30a8\u30ec\u30e1\u30f3\u30c8<\/strong><\/td>\n\u30a2\u30ed\u30a4400 (UNS N04400)<\/strong><\/td>\n\u5408\u91d1K-500 (UNS N05500)<\/strong><\/td>\n\u5408\u91d1R-405 (UNS N04405)<\/strong><\/td>\n<\/tr>\n<\/thead>\n
\u30cb\u30c3\u30b1\u30eb\uff08Ni\uff09<\/b><\/span><\/td>\n63.0%\u5206<\/span><\/td>\n63.0%\u5206<\/span><\/td>\n63.0%\u5206<\/span><\/td>\n<\/tr>\n
\u9285\uff08Cu\uff09<\/b><\/span><\/td>\n28.0 – 34.0%<\/span><\/td>\n27.0 – 33.0%<\/span><\/td>\n28.0 – 34.0%<\/span><\/td>\n<\/tr>\n
\u9244\uff08Fe\uff09<\/b><\/span><\/td>\n\u6700\u59272.5%<\/span><\/td>\n\u6700\u59272.0%<\/span><\/td>\n\u6700\u59272.5%<\/span><\/td>\n<\/tr>\n
\u30de\u30f3\u30ac\u30f3 (Mn)<\/b><\/span><\/td>\n\u6700\u59272.0%<\/span><\/td>\n\u6700\u59271.5%<\/span><\/td>\n\u6700\u59272.0%<\/span><\/td>\n<\/tr>\n
\u30a2\u30eb\u30df\u30cb\u30a6\u30e0\uff08Al\uff09<\/b><\/span><\/td>\n–<\/span><\/td>\n2.3 – 3.15%<\/span><\/td>\n–<\/span><\/td>\n<\/tr>\n
\u30c1\u30bf\u30f3\uff08Ti\uff09<\/b><\/span><\/td>\n–<\/span><\/td>\n0.35 – 0.85%<\/span><\/td>\n–<\/span><\/td>\n<\/tr>\n
\u786b\u9ec4 (S)<\/b><\/span><\/td>\n\u6700\u59270.024%<\/span><\/td>\n0.010%\u6700\u5927<\/span><\/td>\n0.025 – 0.060%<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u306e\u5909\u5316<\/h3>\n

Alloy400\u306f\u4e3b\u529b\u88fd\u54c1\u3068\u3057\u3066\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u73fe\u4ee3\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u3067\u306f\u3001\u8010\u98df\u6027\u3092\u72a0\u7272\u306b\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u3088\u308a\u9ad8\u3044\u6a5f\u68b0\u7684\u5f37\u5ea6\u304c\u8981\u6c42\u3055\u308c\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u6790\u51fa\u786c\u5316\u6027\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u304c\u767b\u5834\u3059\u308b\u3002\u30a2\u30eb\u30df\u30cb\u30a6\u30e0\u3068\u30c1\u30bf\u30f3\u3092\u542b\u3080\u3088\u3046\u306b\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u51b6\u91d1\u5b66\u8005\u306f\u5408\u91d1K-500\u3092\u4f5c\u308a\u307e\u3057\u305f\u3002.<\/p>\n

\u5236\u5fa1\u3055\u308c\u305f\u71b1\u6642\u52b9\u51e6\u7406\u4e2d\u306b\u3001\u3053\u308c\u3089\u306e\u7279\u5b9a\u306e\u5143\u7d20\u6dfb\u52a0\u7269\u306f\u3001\u30ac\u30f3\u30de\u30d7\u30e9\u30a4\u30e0\u76f8\u3068\u3057\u3066\u77e5\u3089\u308c\u308bNi3(Ti, Al)\u306e\u5fae\u5c0f\u7c92\u5b50\u3068\u3057\u3066\u56fa\u6eb6\u4f53\u304b\u3089\u6790\u51fa\u3057\u307e\u3059\u3002\u3053\u306e\u76f8\u306f\u3001\u7d50\u6676\u683c\u5b50\u5185\u306e\u8ee2\u4f4d\u904b\u52d5\u3092\u30ed\u30c3\u30af\u3057\u3001\u713c\u920d\u3055\u308c\u305f\u30d9\u30fc\u30b9\u30e9\u30a4\u30f3\u92fc\u7a2e\u3068\u6bd4\u8f03\u3057\u3066\u3001\u964d\u4f0f\u5f37\u5ea6\u30923\u500d\u3001\u5f15\u5f35\u5f37\u5ea6\u30922\u500d\u306b\u52b9\u679c\u7684\u306b\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u6280\u8853\u8005\u306f\u3001\u3053\u306e\u6539\u826f\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u304c\u3001\u71b1\u51e6\u7406\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u53b3\u683c\u306b\u9075\u5b88\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3053\u3068\u3092\u75db\u611f\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u4e0d\u9069\u5207\u306a\u6642\u52b9\u51e6\u7406\u306f\u3001\u7279\u306b\u6c34\u7d20\u304c\u8c4a\u5bcc\u306a\u74b0\u5883\u3067\u306f\u3001\u6642\u52b9\u786c\u5316\u8106\u5316\u3068\u3057\u3066\u77e5\u3089\u308c\u308b\u73fe\u8c61\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002.<\/p>\n

Another critical variation is Alloy R-405. For applications requiring rapid, high-volume machining\u2014such as the manufacturing of \u30d5\u30a1\u30b9\u30ca\u30fc<\/a>, valve stems, and precision screw machine products\u2014a slight but vital tweak is made to the monel alloy chemical composition. By intentionally increasing the Sulfur content (up to 0.060%), nickel sulfides form within the matrix. These sulfides act as microscopic chip breakers during machining operations, significantly reducing tool wear and improving surface finish.<\/p>\n

\"\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u304c\u91cd\u8981\u306a\u7406\u7531\"<\/p>\n

\u9069\u5207\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0<\/h3>\n

\u7d50\u5c40\u306e\u3068\u3053\u308d\u3001\u91cd\u8981\u306a\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u30fc\u306e\u305f\u3081\u306e\u6750\u6599\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u306f\u3001\u51b6\u91d1\u5b66\u7684\u5236\u7d04\u3092\u7ba1\u7406\u3059\u308b\u8a13\u7df4\u3067\u3042\u308b\u3002\u3053\u308c\u3089\u306e\u5408\u91d1\u3092\u8868\u9762\u7684\u306b\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u5fc5\u7136\u7684\u306b\u6a5f\u5668\u306e\u65e9\u671f\u6545\u969c\u3001\u30d7\u30ed\u30bb\u30b9\u6c5a\u67d3\u3001\u304a\u3088\u3073\u81f4\u547d\u7684\u306a\u5b89\u5168\u30ea\u30b9\u30af\u306b\u3064\u306a\u304c\u308b\u3002\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u306f\u3001\u7d30\u304b\u304f\u8abf\u6574\u3055\u308c\u305f\u51b6\u91d1\u30b7\u30b9\u30c6\u30e0\u3067\u3042\u308a\u3001\u5408\u91d1\u5143\u7d20\u306e\u3059\u3079\u3066\u306e\u30d1\u30fc\u30bb\u30f3\u30c6\u30fc\u30b8\u30fb\u30dd\u30a4\u30f3\u30c8\u306f\u3001\u660e\u78ba\u306a\u69cb\u9020\u7684\u307e\u305f\u306f\u4fdd\u8b77\u7684\u306a\u76ee\u7684\u3092\u679c\u305f\u3059\u3002.<\/p>\n

\u304a\u5ba2\u69d8\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u304c\u6d77\u6d0b\u5de5\u5b66\u3001\u5316\u5b66\u51e6\u7406\u3001\u77f3\u6cb9\u30fb\u30ac\u30b9\u62bd\u51fa\u306e\u3044\u305a\u308c\u306b\u95a2\u308f\u308b\u3082\u306e\u3067\u3042\u3063\u3066\u3082\u3001\u6b63\u78ba\u306a\u5143\u7d20\u30d0\u30e9\u30f3\u30b9\u306e\u78ba\u4fdd\u306f\u8b72\u308c\u307e\u305b\u3093\u3002\u73fe\u5728\u3001\u82db\u9177\u306a\u30d7\u30ed\u30bb\u30b9\u74b0\u5883\u7528\u306e\u6750\u6599\u3092\u8a55\u4fa1\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u300128Nickel\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u30c1\u30fc\u30e0\u306f\u3001\u6df1\u304f\u6398\u308a\u4e0b\u3052\u305f\u6280\u8853\u30b5\u30dd\u30fc\u30c8\u3092\u63d0\u4f9b\u3057\u3001\u304a\u5ba2\u69d8\u306e\u8150\u98df\u30c7\u30fc\u30bf\u3092\u78ba\u8a8d\u3057\u3001\u64cd\u696d\u306e\u6210\u529f\u306b\u5fc5\u8981\u306a\u6b63\u78ba\u306a\u51b6\u91d1\u4ed5\u69d8\u3092\u6c7a\u5b9a\u3059\u308b\u304a\u624b\u4f1d\u3044\u3092\u3044\u305f\u3057\u307e\u3059\u3002.<\/p>\n

\n

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

Q1: \u9244\u306e\u5236\u9650\u306f\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u306b\u3069\u306e\u3088\u3046\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u304b\uff1f<\/b><\/p>\n

Iron is kept strictly below 2.5% in standard grades. While it provides some solid solution strengthening, excessive iron in the monel alloy chemical composition can decrease the material’s resistance to highly reducing acids like hydrofluoric acid and increase the risk of localized corrosion pitting in stagnant seawater.<\/p>\n

Q2: \u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u306f\u3001\u30b5\u30ef\u30fc\u30ac\u30b9\uff08H2S\uff09\u306b\u5bfe\u3057\u3066\u672c\u8cea\u7684\u306b\u8010\u6027\u304c\u3042\u308a\u307e\u3059\u304b\uff1f<\/b><\/p>\n

\u306f\u3044\u3001\u3042\u308b\u95be\u5024\u307e\u3067\u306f\u3002\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u306b\u542b\u307e\u308c\u308b\u9ad8\u3044\u30cb\u30c3\u30b1\u30eb\u3068\u9285\u306e\u30d9\u30fc\u30b9\u30e9\u30a4\u30f3\u306f\u3001\u30b5\u30ef\u30fc\u30ac\u30b9\u74b0\u5883\u306b\u304a\u3051\u308b\u786b\u5316\u7269\u5fdc\u529b\u5272\u308c\u306b\u5bfe\u3059\u308b\u512a\u308c\u305f\u8010\u6027\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u5408\u91d1K-500\u306f\u3001\u786c\u5ea6\u30ec\u30d9\u30eb\u304cNACE MR0175\u898f\u683c\u306b\u9069\u5408\u3057\u3066\u3044\u308c\u3070\u3001\u77f3\u6cb9\u30fb\u30ac\u30b9\u7523\u696d\u306e\u30c0\u30a6\u30f3\u30db\u30fc\u30eb\u30c9\u30ea\u30eb\u30ab\u30e9\u30fc\u3084\u30dd\u30f3\u30d7\u30b7\u30e3\u30d5\u30c8\u306b\u983b\u7e41\u306b\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n

Q3: \u306a\u305c\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u306f\u9178\u5316\u6027\u74b0\u5883\u3067\u7834\u58ca\u3059\u308b\u306e\u3067\u3059\u304b\uff1f<\/b><\/p>\n

\u6838\u3068\u306a\u308bNi-Cu\u30e2\u30cd\u30eb\u5408\u91d1\u306e\u5316\u5b66\u7d44\u6210\u306f\u3001\u8868\u9762\u4fdd\u8b77\u819c\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u9084\u5143\u6761\u4ef6\u306b\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u3002\u785d\u9178\u3001\u7b2c\u4e8c\u9244\u5869\u3001\u9ad8\u6fc3\u5ea6\u30a2\u30f3\u30e2\u30cb\u30a2\u306e\u3088\u3046\u306a\u5f37\u3044\u9178\u5316\u5264\u306e\u5b58\u5728\u4e0b\u3067\u306f\u3001\u9285\u306e\u542b\u6709\u91cf\u304c\u5f0a\u5bb3\u3068\u306a\u308a\u3001\u5408\u91d1\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u306e\u6025\u901f\u306a\u6eb6\u89e3\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u3001\u30af\u30ed\u30e0\u3092\u542b\u3080\u5408\u91d1\uff08\u30a4\u30f3\u30b3\u30cd\u30eb\u3084\u30cf\u30b9\u30c6\u30ed\u30a4\u306a\u3069\uff09\u304c\u69cb\u9020\u7684\u306b\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002.<\/p>","protected":false},"excerpt":{"rendered":"

In the rigorous field of materials engineering, selecting the right alloy for highly corrosive environments\u2014such as alkylation units, marine splash zones, and chemical processing facilities\u2014leaves no room for guesswork. Standard austenitic stainless steels often suffer rapid degradation when exposed to reducing acids. To understand why certain nickel-copper matrices excel where others deteriorate catastrophically, we must fundamentally examine the monel alloy chemical composition. In my two decades of evaluating metallurgical failures and specifying alloys for severe service conditions, I have consistently found that the secret to this material’s longevity lies not just in its primary elements, but in the precise thermodynamic balance of its micro-alloying additions. The monel alloy chemical composition […]<\/p>","protected":false},"author":1,"featured_media":2754,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2752","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"spectra_custom_meta":{"_edit_lock":["1772683091:1"],"_edit_last":["1"],"rank_math_internal_links_processed":["1"],"rank_math_seo_score":["77"],"rank_math_description":["Struggling with HF acid? Analyzing monel alloy chemical composition reveals why standard grades fail and how proper Ni-Cu ratios survive."],"rank_math_focus_keyword":["monel alloy chemical composition"],"_thumbnail_id":["2754"],"_wp_page_template":["default"],"ilj_blacklistdefinition":["a:0:{}"],"ilj_linkdefinition":["a:1:{i:0;s:32:\"monel alloy chemical composition\";}"],"site-sidebar-layout":["default"],"ast-site-content-layout":["default"],"site-content-style":["default"],"site-sidebar-style":["default"],"theme-transparent-header-meta":["default"],"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) !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:\"1777019846\";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-2752.css"]},"uagb_featured_image_src":{"full":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/158.jpg",1408,768,false],"thumbnail":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/158-150x150.jpg",150,150,true],"medium":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/158-300x164.jpg",300,164,true],"medium_large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/158-768x419.jpg",768,419,true],"large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/158-1024x559.jpg",1024,559,true],"1536x1536":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/158.jpg",1408,768,false],"2048x2048":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/158.jpg",1408,768,false],"trp-custom-language-flag":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/158-18x10.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":"In the rigorous field of materials engineering, selecting the right alloy for highly corrosive environments\u2014such as alkylation units, marine splash zones, and chemical processing facilities\u2014leaves no room for guesswork. Standard austenitic stainless steels often suffer rapid degradation when exposed to reducing acids. To understand why certain nickel-copper matrices excel where others deteriorate catastrophically, we must…","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2752","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=2752"}],"version-history":[{"count":2,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2752\/revisions"}],"predecessor-version":[{"id":2756,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2752\/revisions\/2756"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/media\/2754"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/media?parent=2752"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/categories?post=2752"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/tags?post=2752"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}