{"id":21213,"date":"2025-03-03T07:26:00","date_gmt":"2025-03-02T23:26:00","guid":{"rendered":"https:\/\/steelprogroup.com\/?p=21213"},"modified":"2025-03-04T17:56:15","modified_gmt":"2025-03-04T09:56:15","slug":"4340-steel","status":"publish","type":"post","link":"https:\/\/steelprogroup.com\/ja\/alloy-steel\/4340-steel\/","title":{"rendered":"AISI 4340 \u92fc: \u7279\u6027\u3001\u88fd\u54c1\u3001\u7528\u9014"},"content":{"rendered":"<p>4340 \u5408\u91d1\u92fc\u306f\u3001\u305d\u306e\u6c4e\u7528\u6027\u3068\u5f37\u5ea6\u3067\u77e5\u3089\u308c\u3066\u304a\u308a\u3001\u30ae\u30a2\u3084\u30b7\u30e3\u30d5\u30c8\u306a\u3069\u306e\u9ad8\u6027\u80fd\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u6700\u9069\u3067\u3059\u3002SteelPro Group \u3067\u306f\u30014340 \u92fc\u306e\u6f5c\u5728\u80fd\u529b\u3092\u6700\u5927\u9650\u306b\u5f15\u304d\u51fa\u3059\u305f\u3081\u306b\u3001\u6570\u5341\u5e74\u306b\u308f\u305f\u3063\u3066\u88fd\u9020\u30d7\u30ed\u30bb\u30b9\u3092\u6539\u826f\u3057\u3066\u304d\u307e\u3057\u305f\u3002<\/p><p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u30014340 \u92fc\u306e\u7279\u5fb4\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002\u305d\u306e\u72ec\u7279\u306e\u7279\u6027\u304b\u3089\u5e45\u5e83\u3044\u7528\u9014\u307e\u3067\u3001\u3053\u306e\u7d20\u6750\u304c\u4e16\u754c\u4e2d\u306e\u696d\u754c\u3067\u4fe1\u983c\u3055\u308c\u3066\u3044\u308b\u7406\u7531\u304c\u308f\u304b\u308a\u307e\u3059\u3002&nbsp;&nbsp;<\/p><h2 class=\"wp-block-heading\">4340 \u30b9\u30c1\u30fc\u30eb\u3068\u306f\u4f55\u3067\u3059\u304b?<\/h2><p>4340 \u92fc\u306f\u3001\u8010\u4e45\u6027\u3001\u8010\u75b2\u52b4\u6027\u3001\u8010\u6469\u8017\u6027\u306b\u512a\u308c\u305f\u9ad8\u5f37\u5ea6\u4f4e\u5408\u91d1\u91d1\u5c5e\u3067\u3059\u3002\u4e2d\u70ad\u7d20\u92fc\u3067\u3001\u901a\u5e38 0.40% \uff5e 0.42% \u306e\u70ad\u7d20\u306e\u307b\u304b\u3001\u30cb\u30c3\u30b1\u30eb\u3001\u30af\u30ed\u30e0\u3001\u30e2\u30ea\u30d6\u30c7\u30f3\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u512a\u308c\u305f\u5f37\u5ea6\u3068\u8010\u6469\u8017\u6027\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u822a\u7a7a\u5b87\u5b99\u3001\u81ea\u52d5\u8eca\u3001\u91cd\u6a5f\u88fd\u9020\u306a\u3069\u306e\u5206\u91ce\u3067\u306e\u53b3\u3057\u3044\u7528\u9014\u306b\u6700\u9069\u3067\u3059\u3002<\/p><p>\u713c\u304d\u306a\u307e\u3057\u72b6\u614b\u306e 4340 \u92fc\u306f\u6a5f\u68b0\u52a0\u5de5\u3084\u51b7\u9593\u52a0\u5de5\u304c\u5bb9\u6613\u3067\u3001\u88fd\u9020\u306b\u67d4\u8edf\u6027\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u6eb6\u63a5\u6027\u306b\u3082\u512a\u308c\u3066\u304a\u308a\u3001\u8907\u96d1\u306a\u6eb6\u63a5\u90e8\u54c1\u306b\u6700\u9069\u3067\u3059\u3002\u6cb9\u713c\u304d\u5165\u308c\u3068\u713c\u304d\u623b\u3057\u306e\u5f8c\u3001\u5f37\u5ea6\u3068\u5ef6\u6027\u306e\u5f37\u529b\u306a\u7d44\u307f\u5408\u308f\u305b\u304c\u5b9f\u73fe\u3057\u307e\u3059\u3002\u706b\u708e\u307e\u305f\u306f\u9ad8\u5468\u6ce2\u713c\u5165\u308c\u3068\u7a92\u5316\u306b\u3088\u3063\u3066\u3055\u3089\u306b\u786c\u5316\u3055\u305b\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u305f\u3081\u3001\u8981\u6c42\u306e\u53b3\u3057\u3044\u7528\u9014\u3067\u3082\u8010\u4e45\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p><h2 class=\"wp-block-heading\">4340 \u92fc\u306f\u4f55\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u304b?<\/h2><ul class=\"wp-block-list\"><li><strong>\u822a\u7a7a\u5b87\u5b99<\/strong>: \u8ecd\u7528\u822a\u7a7a\u6a5f\u90e8\u54c1\u3001\u30bf\u30fc\u30d3\u30f3\u30b7\u30e3\u30d5\u30c8\u3001\u7ffc\u6841<\/li>\n\n<li><strong>\u81ea\u52d5\u8eca<\/strong>: \u30af\u30e9\u30f3\u30af\u30b7\u30e3\u30d5\u30c8\u3001\u30a2\u30af\u30b9\u30eb\u30b7\u30e3\u30d5\u30c8\u3001\u30ab\u30e0\u30b7\u30e3\u30d5\u30c8\u3001\u30c7\u30a3\u30d5\u30a1\u30ec\u30f3\u30b7\u30e3\u30eb\u30ae\u30a2<strong>s<\/strong><\/li>\n\n<li><strong>\u30de\u30ea\u30f3<\/strong>: \u30d7\u30ed\u30da\u30e9\u30b7\u30e3\u30d5\u30c8\u3001\u8235\u8ef8\u3001\u30a6\u30a4\u30f3\u30c1\u30ae\u30a2<\/li>\n\n<li><strong>\u98a8\u529b<\/strong>: \u30d4\u30c3\u30c1\u304a\u3088\u3073\u30e8\u30fc\u30d9\u30a2\u30ea\u30f3\u30b0\u3001\u30ae\u30a2\u30dc\u30c3\u30af\u30b9\u7528\u30ae\u30a2\u30ea\u30f3\u30b0<\/li>\n\n<li><strong>\u91cd\u6a5f<\/strong>: \u6cb9\u5727\u30b7\u30ea\u30f3\u30c0\u30fc\u3001\u30d6\u30eb\u30c9\u30fc\u30b6\u30fc\u306e\u5c65\u5e2f\u3001\u9271\u5c71\u6a5f\u68b0\u306e\u30ae\u30a2<\/li>\n\n<li><strong>\u77f3\u6cb9\u30fb\u30ac\u30b9<\/strong>: \u6398\u524a\u30ab\u30e9\u30fc\u3001\u30dd\u30f3\u30d7\u30b7\u30e3\u30d5\u30c8\u3001\u30d0\u30eb\u30d6\u30dc\u30c7\u30a3\u3001\u5751\u53e3\u8a2d\u5099<\/li><\/ul><h2 class=\"wp-block-heading\">4340\u92fc\u76f8\u5f53\u30b0\u30ec\u30fc\u30c9<\/h2><p>\u6b21\u306e\u8868\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u30b0\u30ed\u30fc\u30d0\u30eb \u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b 4340 \u92fc\u306e\u540c\u7b49\u306e\u7b49\u7d1a\u3068\u6a19\u6e96\u306e\u6982\u8981\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002SteelPro Group \u3067\u306f\u3001\u3053\u308c\u3089\u306e\u516c\u8a8d\u6a19\u6e96\u306b\u6e96\u62e0\u3057\u305f\u9ad8\u54c1\u8cea\u306e 4340 \u92fc\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u56fd\/\u5730\u57df<\/strong><\/td><td><strong>\u30b9\u30bf\u30f3\u30c0\u30fc\u30c9<\/strong><\/td><td><strong>\u30b0\u30ec\u30fc\u30c9<\/strong><\/td><\/tr><tr><td>\u4e2d\u56fd<\/td><td>\u30a4\u30ae\u30ea\u30b9<\/td><td>40CrNiMo<\/td><\/tr><tr><td rowspan=\"2\">\u30a2\u30e1\u30ea\u30ab<\/td><td>ASTM<\/td><td>4340<\/td><\/tr><tr><td>\u56fd\u9023<\/td><td>G43400<\/td><\/tr><tr><td>EU<\/td><td>EN<\/td><td>34CrNiMo6<\/td><\/tr><tr><td rowspan=\"2\">\u30c9\u30a4\u30c4<\/td><td>\u30c7\u30a3\u30f3<\/td><td>1.6582<\/td><\/tr><tr><td>W-Nr.<\/td><td>1.6511<\/td><\/tr><tr><td>\u65e5\u672c<\/td><td>JIS<\/td><td>SNCM447<\/td><\/tr><tr><td>\u30d5\u30e9\u30f3\u30b9<\/td><td>NF EN\/NF<\/td><td>35NCD6<\/td><\/tr><tr><td>\u30a4\u30f3\u30b0\u30e9\u30f3\u30c9<\/td><td>BS \u82f1\u8a9e\/BS<\/td><td>817M40<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">4340\u92fc\u306e\u5316\u5b66\u6210\u5206<\/h2><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u30a8\u30ec\u30e1\u30f3\u30c8<\/strong><\/td><td><strong>\u5185\u5bb9<\/strong><\/td><\/tr><tr><td>\u30ab\u30fc\u30dc\u30f3\uff08C\uff09<\/td><td>0.38 &#8211; 0.43%<\/td><\/tr><tr><td>\u30b1\u30a4\u7d20 (Si)<\/td><td>0.15 &#8211; 0.35%<\/td><\/tr><tr><td>\u30de\u30f3\u30ac\u30f3 (Mn)<\/td><td>0.60 &#8211; 0.80%<\/td><\/tr><tr><td>\u30ea\u30f3 (P)<\/td><td>\u2264 0.035%<\/td><\/tr><tr><td>\u786b\u9ec4\uff08S\uff09<\/td><td>\u2264 0.04%<\/td><\/tr><tr><td>\u30af\u30ed\u30e0\uff08Cr\uff09<\/td><td>0.70 &#8211; 0.90%<\/td><\/tr><tr><td>\u30cb\u30c3\u30b1\u30eb\uff08Ni\uff09<\/td><td>1.62 &#8211; 2.00%<\/td><\/tr><tr><td>\u9285\uff08Cu\uff09<\/td><td>\u2264 0.35%<\/td><\/tr><tr><td>\u30e2\u30ea\u30d6\u30c7\u30f3 (Mo)<\/td><td>0.20 &#8211; 0.30%<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">4340\u92fc\u306e\u6a5f\u68b0\u7684\u6027\u8cea<\/h2><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong><\/td><td><strong>\u6570\u5024\uff08\u30e1\u30c8\u30ea\u30c3\u30af\uff09<\/strong><\/td><td><strong>\u6570\u5024\uff08\u30a4\u30f3\u30da\u30ea\u30a2\u30eb\uff09<\/strong><\/td><\/tr><tr><td>\u964d\u4f0f\u5f37\u5ea6<\/td><td>740 \u2013 1860 MPa<\/td><td>107 \u2013 270 ksi<\/td><\/tr><tr><td>\u6700\u5927\u5f15\u5f35\u5f37\u5ea6<\/td><td>860 \u2013 1980 MPa<\/td><td>125 \u2013 287 ksi<\/td><\/tr><tr><td>\u4f38\u3073<\/td><td>11 &#8211; 23%<\/td><td>11 &#8211; 23%<\/td><\/tr><tr><td>\u5e73\u9762\u3072\u305a\u307f\u7834\u58ca\u976d\u6027<\/td><td>53 \u2013 110 MPa\u221am<\/td><td>47 \u2013 100 ksi\u221ain<\/td><\/tr><tr><td>\u4f53\u7a4d\u5f3e\u6027\u7387<\/td><td>159GPa<\/td><td>23100ksi<\/td><\/tr><tr><td>\u30dd\u30a2\u30bd\u30f3\u6bd4<\/td><td>0.29<\/td><td>0.29<\/td><\/tr><tr><td>\u52a0\u5de5\u6027<\/td><td>57%\uff08\u713c\u920d\uff09<\/td><td>57%\uff08\u713c\u920d\uff09<\/td><\/tr><tr><td>\u305b\u3093\u65ad\u5f3e\u6027\u4fc2\u6570<\/td><td>78.0 \u4e07\u6c17\u5727<\/td><td>11300ksi<\/td><\/tr><\/tbody><\/table><\/figure><ul class=\"wp-block-list\"><li><strong>\u6a5f\u68b0\u52a0\u5de5\u6027\u306b\u95a2\u3059\u308b\u6ce8\u8a18<\/strong>: \u3053\u306e\u30c7\u30fc\u30bf\u306f\u3001AISI 1212 \u92fc\u306e 100% \u6a5f\u68b0\u52a0\u5de5\u6027\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002\u713c\u920d\u304a\u3088\u3073\u51b7\u9593\u5f15\u629c\u5f8c\u30014340 \u92fc\u306e\u6a5f\u68b0\u52a0\u5de5\u6027\u306f 50% \u3068\u8a55\u4fa1\u3055\u308c\u307e\u3059\u3002&nbsp;<\/li><\/ul><h2 class=\"wp-block-heading\">4340 \u92fc\u306e\u7269\u7406\u7684\u7279\u6027<\/h2><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong><\/td><td><strong>\u6570\u5024\uff08\u30e1\u30c8\u30ea\u30c3\u30af\uff09<\/strong><\/td><td><strong>\u6570\u5024\uff08\u30a4\u30f3\u30da\u30ea\u30a2\u30eb\uff09<\/strong><\/td><\/tr><tr><td>\u5bc6\u5ea6<\/td><td>7.85 g\/cm\u00b3<\/td><td>0.284 lb\/in\u00b3<\/td><\/tr><tr><td>\u878d\u70b9<\/td><td>1425\u2103<\/td><td>2597\u00b0F<\/td><\/tr><tr><td>\u71b1\u4f1d\u5c0e\u7387<\/td><td>46W\/m\u00b7K<\/td><td>32 BTU\/h\u00b7ft\u00b7\u00b0F<\/td><\/tr><tr><td>\u6bd4\u71b1\u5bb9\u91cf<\/td><td>460 J\/kg-K<\/td><td>0.11 BTU\/lb-\u00b0F<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">4340\u92fc\u306e\u71b1\u7279\u6027<\/h2><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u71b1\u7279\u6027<\/strong><\/td><td><strong>\u30e1\u30fc\u30c8\u30eb<\/strong><\/td><td><strong>\u30a4\u30f3\u30da\u30ea\u30a2\u30eb<\/strong><\/td><td><strong>\u30b3\u30e1\u30f3\u30c8<\/strong><\/td><\/tr><tr><td rowspan=\"6\">\u71b1\u81a8\u5f35\u4fc2\u6570 (CTE)<\/td><td>12.3 \u00b5m\/m-\u00b0C<br>20\u2103\u3067<\/td><td>6.83 \u00b5in\/in-\u00b0F<br>@ 68\u00b0F<\/td><td>\u6cb9\u713c\u5165\u308c\u3001600\u00b0C (1110\u00b0F) \u713c\u304d\u623b\u3057<\/td><\/tr><tr><td>12.6 \u00b5m\/m-\u00b0C<br>@ 21-260\u00b0C<\/td><td>7.00 \u00b5in\/in-\u00b0F<br>@ 69.8-500\u00b0F<\/td><td>1.88% Ni\u3001\u713c\u5165\u308c\u713c\u623b\u3057\u6e08\u307f<\/td><\/tr><tr><td>12.7 \u00b5m\/m-\u00b0C<br>20\u2103\u3067<\/td><td>7.06 \u00b5in\/in-\u00b0F<br>@ 68\u00b0F<\/td><td>\u6cb9\u713c\u5165\u308c\u3001600\u00b0C (1110\u00b0F) \u713c\u304d\u623b\u3057<\/td><\/tr><tr><td>13.7 \u00b5m\/m-\u00b0C<br>250\u2103\u3067<\/td><td>7.61 \u00b5in\/in-\u00b0F<br>@ 482\u00b0F<\/td><td>\u6cb9\u713c\u5165\u308c\u3001600\u00b0C (1110\u00b0F) \u713c\u304d\u623b\u3057<\/td><\/tr><tr><td>13.7 \u00b5m\/m-\u00b0C<br>@ 21-540\u00b0C<\/td><td>7.61 \u00b5in\/in-\u00b0F<br>@ 69.8-1000\u00b0F<\/td><td>1.88% Ni\u3001\u713c\u5165\u308c\u713c\u623b\u3057\u6e08\u307f<\/td><\/tr><tr><td>13.9 \u00b5m\/m-\u00b0C<br>@ 21-540\u00b0C<\/td><td>7.72 \u00b5in\/in-\u00b0F<br>@ 69.8-1000\u00b0F<\/td><td>1.90% Ni\u3001\u713c\u5165\u308c\u3001\u713c\u623b\u3057<\/td><\/tr><tr><td>\u6bd4\u71b1\u5bb9\u91cf<\/td><td>0.475 J\/g-\u2103<\/td><td>0.114 BTU\/\u30dd\u30f3\u30c9-\u00b0F<\/td><td>\u5178\u578b\u7684\u306a4000\u30b7\u30ea\u30fc\u30ba\u92fc<\/td><\/tr><tr><td>\u71b1\u4f1d\u5c0e\u7387<\/td><td>44.5W\/mK<\/td><td>309 BTU-in\/hr-ft\u00b2-\u00b0F<\/td><td>&#8211;<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">4340\u5408\u91d1\u92fc\u306e\u9577\u6240\u3068\u77ed\u6240<\/h2><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u30e1\u30ea\u30c3\u30c8<\/strong><\/td><td><strong>\u30c7\u30e1\u30ea\u30c3\u30c8<\/strong><\/td><\/tr><tr><td>\u8010\u885d\u6483\u6027\u3001\u8010\u885d\u6483\u6027\u306b\u512a\u308c\u3066\u3044\u307e\u3059\u3002<\/td><td>\u713c\u5272\u308c\u306e\u5371\u967a\u304c\u3042\u308a\u307e\u3059\u3002<\/td><\/tr><tr><td>\u8010\u6469\u8017\u6027\u3001\u8010\u6469\u64e6\u6027\u306b\u512a\u308c\u3066\u3044\u307e\u3059\u3002<\/td><td>\u7cbe\u5bc6\u3067\u7279\u6b8a\u306a\u51e6\u7406\u304c\u5fc5\u8981\u3067\u3059\u3002<\/td><\/tr><tr><td>\u9ad8\u3044\u5f37\u5ea6\u3068\u976d\u6027\u3002<\/td><td>\u8150\u98df\u3057\u3084\u3059\u3044\u3002<\/td><\/tr><tr><td>\u512a\u308c\u305f\u8010\u75b2\u52b4\u6027\u3002<\/td><td><\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">4340\u5408\u91d1\u92fc\u306f\u3069\u306e\u3088\u3046\u306b\u4f5c\u3089\u308c\u308b\u306e\u3067\u3059\u304b\uff1f<\/h2><ol class=\"wp-block-list\"><li>\u6eb6\u89e3\u3068\u7cbe\u88fd<\/li><\/ol><p>\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u96fb\u6c17\u30a2\u30fc\u30af\u7089\u3067\u9244\u3001\u70ad\u7d20\u3001\u5408\u91d1\u5143\u7d20\u3092\u6eb6\u304b\u3059\u3053\u3068\u304b\u3089\u59cb\u307e\u308b\u3002 <strong>1,400\u2103<\/strong> (<strong>2,550\u00b0F<\/strong>\u3053\u306e\u30b9\u30c6\u30c3\u30d7\u3067\u306f\u5747\u8cea\u306a\u6eb6\u878d\u5408\u91d1\u304c\u4f5c\u3089\u308c\u307e\u3059\u3002\u52b9\u679c\u7684\u306a\u786c\u5316\u306b\u306f\u3001\u771f\u7a7a\u8131\u30ac\u30b9\u306a\u3069\u306e\u7cbe\u88fd\u65b9\u6cd5\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p><ol start=\"2\" class=\"wp-block-list\"><li>\u92f3\u9020\u3068\u6210\u5f62<\/li><\/ol><p>\u92fc\u304c\u30d3\u30ec\u30c3\u30c8\u307e\u305f\u306f\u30a4\u30f3\u30b4\u30c3\u30c8\u306b\u92f3\u9020\u3055\u308c\u305f\u5f8c\u3001 <strong>427\uff5e1,233\u2103<\/strong> (<strong>800\uff5e2,250\u00b0F<\/strong>\u935b\u9020\u306b\u3088\u308a\u92fc\u304c\u6210\u5f62\u3055\u308c\u3001\u5185\u90e8\u306e\u7d50\u6676\u69cb\u9020\u304c\u6539\u826f\u3055\u308c\u3001\u5f37\u5ea6\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002&nbsp;<\/p><p>\u3053\u306e\u6bb5\u968e\u3067\u306f\u3001\u3072\u3073\u5272\u308c\u3092\u9632\u3050\u305f\u3081\u306b\u51b7\u5374\u3092\u5236\u5fa1\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u7802\u307e\u305f\u306f\u4e7e\u71e5\u77f3\u7070\u3067\u3086\u3063\u304f\u308a\u51b7\u5374\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p><ol start=\"3\" class=\"wp-block-list\"><li>\u71b1\u51e6\u7406 \u2013 \u713c\u5165\u308c\u3068\u713c\u623b\u3057<\/li><\/ol><p>\u307e\u305a\u3001\u92fc\u3092\u52a0\u71b1\u3057\u3066 <strong>830\uff5e860\u2103<\/strong> (<strong>1,525\uff5e1,580\u00b0F<\/strong>\uff09\u3092\u6cb9\u3067\u6025\u51b7\u3057\u3001\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u7d44\u7e54\u3092\u5f62\u6210\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u92fc\u306f <strong>400\uff5e600\u2103<\/strong> (<strong>750\uff5e1,100\u00b0F<\/strong>\uff09\u3092\u63a1\u7528\u3057\u3001\u5f37\u5ea6\u3092\u4fdd\u3061\u306a\u304c\u3089\u976d\u6027\u3092\u5411\u4e0a\u3055\u305b\u307e\u3057\u305f\u3002&nbsp;<\/p><ol start=\"4\" class=\"wp-block-list\"><li>\u30a2\u30cb\u30fc\u30ea\u30f3\u30b0\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\uff09<\/li><\/ol><p>4340\u92fc\u306f\u52a0\u71b1\u3055\u308c\u3066 <strong>844\u2103<\/strong> (<strong>1,550\u00b0F<\/strong>\uff09\u3092\u7089\u3067\u3086\u3063\u304f\u308a\u51b7\u5374\u3057\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u3088\u308a\u92fc\u306e\u69cb\u9020\u304c\u6d17\u7df4\u3055\u308c\u3001\u5f8c\u306e\u6bb5\u968e\u3067\u306e\u6a5f\u68b0\u52a0\u5de5\u3084\u6210\u5f62\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/p><ol start=\"5\" class=\"wp-block-list\"><li>\u6700\u7d42\u52a0\u5de5\u3068\u8868\u9762\u4ed5\u4e0a\u3052<\/li><\/ol><p>\u92fc\u6750\u306b\u71b1\u51e6\u7406\u3068\u5fc5\u8981\u306a\u8868\u9762\u786c\u5316\u51e6\u7406\u304c\u65bd\u3055\u308c\u308b\u3068\u3001\u6700\u7d42\u52a0\u5de5\u306e\u6e96\u5099\u304c\u6574\u3044\u307e\u3059\u3002\u65cb\u524a\u3001\u30d5\u30e9\u30a4\u30b9\u52a0\u5de5\u3001\u7814\u524a\u306a\u3069\u306e\u7cbe\u5bc6\u52a0\u5de5\u306b\u3088\u308a\u3001\u5fc5\u8981\u306a\u5bf8\u6cd5\u3068\u8868\u9762\u4ed5\u4e0a\u3052\u304c\u9054\u6210\u3055\u308c\u3001\u92fc\u6750\u304c\u7528\u9014\u306e\u7279\u5b9a\u306e\u8981\u6c42\u3092\u6e80\u305f\u3059\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002<\/p><p>SteelPro Group \u3067\u306f\u3001\u6700\u9ad8\u54c1\u8cea\u306e 4340 \u92fc\u68d2\u3001\u92fc\u677f\u3001\u92fc\u68d2\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u306b\u6ce8\u529b\u3057\u3066\u3044\u307e\u3059\u3002\u5f53\u793e\u306e\u5c02\u9580\u5bb6\u306f\u3001\u5404\u30d0\u30c3\u30c1\u304c\u53b3\u683c\u306a\u57fa\u6e96\u306b\u6e96\u62e0\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002&nbsp;<\/p><h2 class=\"wp-block-heading\">4340 \u30b9\u30c1\u30fc\u30eb\u88fd\u54c1\u4ed5\u69d8<\/h2><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u88fd\u54c1\u30bf\u30a4\u30d7<\/strong><\/td><td><strong>\u76f4\u5f84\/\u539a\u3055<\/strong><\/td><td><strong>\u9577\u3055\/\u5e45<\/strong><\/td><\/tr><tr><td>\u30d0\u30fc<\/td><td>\u76f4\u5f840.5\u30a4\u30f3\u30c1\uff5e12\u30a4\u30f3\u30c1\uff0812.7 mm\uff5e304.8 mm\uff09<\/td><td>\u9577\u3055\u6700\u592720\u30d5\u30a3\u30fc\u30c8\uff086.1\u30e1\u30fc\u30c8\u30eb\uff09<\/td><\/tr><tr><td>\u30e9\u30a6\u30f3\u30c9<\/td><td>\u76f4\u5f840.5\u30a4\u30f3\u30c1\uff5e12\u30a4\u30f3\u30c1\uff0812.7 mm\uff5e304.8 mm\uff09<\/td><td>\u9577\u3055\u6700\u592720\u30d5\u30a3\u30fc\u30c8\uff086.1\u30e1\u30fc\u30c8\u30eb\uff09<\/td><\/tr><tr><td>\u30d7\u30ec\u30fc\u30c8<\/td><td>\u539a\u30550.5\u30a4\u30f3\u30c1\uff5e6\u30a4\u30f3\u30c1\uff0812.7 mm\uff5e152.4 mm\uff09<\/td><td>\u5e45\u6700\u5927120\u30a4\u30f3\u30c1\uff083.05\u30e1\u30fc\u30c8\u30eb\uff09<\/td><\/tr><tr><td>\u30b7\u30fc\u30c4<\/td><td>\u539a\u30550.5\u30a4\u30f3\u30c1\uff5e2\u30a4\u30f3\u30c1\uff0812.7 mm\uff5e50.8 mm\uff09<\/td><td>\u5e45\u6700\u5927120\u30a4\u30f3\u30c1\uff083.05\u30e1\u30fc\u30c8\u30eb\uff09<\/td><\/tr><tr><td>\u30ed\u30c3\u30c9<\/td><td>\u76f4\u5f840.5\u30a4\u30f3\u30c1\uff5e6\u30a4\u30f3\u30c1\uff0812.7 mm\uff5e152.4 mm\uff09<\/td><td>\u9577\u3055\u6700\u592720\u30d5\u30a3\u30fc\u30c8\uff086.1\u30e1\u30fc\u30c8\u30eb\uff09<\/td><\/tr><tr><td>\u30e9\u30a6\u30f3\u30c9\uff08\u6a5f\u68b0\u52a0\u5de5\uff09<\/td><td>\u76f4\u5f840.5\u30a4\u30f3\u30c1\uff5e10\u30a4\u30f3\u30c1\uff0812.7 mm\uff5e254 mm\uff09<\/td><td>\u9577\u3055\u6700\u592720\u30d5\u30a3\u30fc\u30c8\uff086.1\u30e1\u30fc\u30c8\u30eb\uff09<\/td><\/tr><tr><td>\u30d0\u30fc\uff08\u51b7\u9593\u5f15\u629c\uff09<\/td><td>\u76f4\u5f840.5\u30a4\u30f3\u30c1\uff5e6\u30a4\u30f3\u30c1\uff0812.7 mm\uff5e152.4 mm\uff09<\/td><td>\u9577\u3055\u6700\u592720\u30d5\u30a3\u30fc\u30c8\uff086.1\u30e1\u30fc\u30c8\u30eb\uff09<\/td><\/tr><\/tbody><\/table><\/figure><p>\u5f53\u793e\u3067\u306f\u3001\u304a\u5ba2\u69d8\u306e\u7279\u5b9a\u306e\u30cb\u30fc\u30ba\u3092\u6e80\u305f\u3059\u305f\u3081\u306b\u30014340 \u5408\u91d1\u92fc\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3055\u308c\u305f\u5bf8\u6cd5\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u71b1\u9593\u5727\u5ef6\u92fc\u3001\u713c\u304d\u306a\u307e\u3057\u92fc\u3001\u51b7\u9593\u5f15\u629c\u92fc\u306e\u3044\u305a\u308c\u304c\u5fc5\u8981\u3067\u3042\u3063\u3066\u3082\u3001\u304a\u5ba2\u69d8\u306e\u7528\u9014\u306b\u6700\u9069\u306a\u5f62\u72b6\u3092\u63d0\u4f9b\u3067\u304d\u307e\u3059\u3002<\/p><ul class=\"wp-block-list\"><li><strong>\u71b1\u9593\u5727\u5ef6<\/strong>: \u92fc\u306f\u9ad8\u6e29\u3067\u51e6\u7406\u3055\u308c\u3001\u976d\u6027\u3068\u5f37\u5ea6\u304c\u5411\u4e0a\u3057\u3001\u5927\u578b\u3067\u9ad8\u5fdc\u529b\u306e\u90e8\u54c1\u306b\u6700\u9069\u3067\u3059\u3002<\/li>\n\n<li><strong>\u30a2\u30cb\u30fc\u30eb<\/strong>\u92fc\u3092\u52a0\u71b1\u3057\u3001\u3086\u3063\u304f\u308a\u51b7\u5374\u3059\u308b\u3053\u3068\u3067\u7d44\u7e54\u3092\u7cbe\u88fd\u3057\u3001\u6a5f\u68b0\u52a0\u5de5\u3084\u6210\u5f62\u3092\u5bb9\u6613\u306b\u3057\u307e\u3059\u3002<\/li>\n\n<li><strong>\u51b7\u9593\u5f15\u629c<\/strong>: \u92fc\u306f\u5e38\u6e29\u3067\u91d1\u578b\u306b\u901a\u3055\u308c\u3001\u5f37\u5ea6\u3001\u7cbe\u5ea6\u3001\u8868\u9762\u54c1\u8cea\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/li><\/ul><h2 class=\"wp-block-heading\">4340\u5408\u91d1\u92fc\u306b\u95a2\u3059\u308b\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2><h3 class=\"wp-block-heading\">4340 \u30b9\u30c1\u30fc\u30eb\u306f\u30b9\u30c6\u30f3\u30ec\u30b9\u3067\u3059\u304b?<\/h3><p>\u3044\u3044\u3048\u30014340 \u92fc\u306f\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc\u306e\u3088\u3046\u306b\u8010\u8150\u98df\u6027\u3092\u9ad8\u3081\u308b\u9ad8\u30ec\u30d9\u30eb\u306e\u30af\u30ed\u30e0\u3084\u305d\u306e\u4ed6\u306e\u5143\u7d20\u306f\u542b\u307e\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/p><h3 class=\"wp-block-heading\">4340 \u92fc\u3068 4140 \u92fc\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b?<\/h3><p>4340\u92fc\u306b\u306f\u30cb\u30c3\u30b1\u30eb\u3001\u30af\u30ed\u30e0\u3001\u30e2\u30ea\u30d6\u30c7\u30f3\u304c\u591a\u304f\u542b\u307e\u308c\u3066\u304a\u308a\u3001 <a href=\"https:\/\/steelprogroup.com\/ja\/steel-bar\/4140\/\">4140\u30b9\u30c1\u30fc\u30eb<\/a>.<\/p><p>4340 \u92fc\u306f\u3001\u822a\u7a7a\u5b87\u5b99\u3001\u81ea\u52d5\u8eca\u3001\u8ecd\u4e8b\u90e8\u54c1\u306a\u3069\u306e\u9ad8\u5fdc\u529b\u3001\u9ad8\u8010\u4e45\u6027\u306e\u7528\u9014\u306b\u6700\u9069\u3067\u3059\u3002\u5bfe\u7167\u7684\u306b\u3001\u5408\u91d1\u542b\u6709\u91cf\u306e\u5c11\u306a\u3044 4140 \u92fc\u306f\u3001\u30b7\u30e3\u30d5\u30c8\u3001\u30ae\u30a2\u3001\u30dc\u30eb\u30c8\u306a\u3069\u3001\u4e2d\u7a0b\u5ea6\u306e\u5f37\u5ea6\u304c\u6c42\u3081\u3089\u308c\u308b\u90e8\u54c1\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p><h2 class=\"wp-block-heading\">\u6b21\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b4340\u5408\u91d1\u92fc\u306e\u5f37\u5ea6\u3092\u6d3b\u7528<\/h2><p>SteelPro Group \u306f\u3001\u304a\u5ba2\u69d8\u306e\u696d\u754c\u7279\u6709\u306e\u30cb\u30fc\u30ba\u3092\u6e80\u305f\u3059\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3055\u308c\u305f 4340 \u92fc\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306e\u63d0\u4f9b\u3092\u5c02\u9580\u3068\u3057\u3066\u3044\u307e\u3059\u3002\u5c02\u9580\u5bb6\u306e\u30a2\u30c9\u30d0\u30a4\u30b9\u3001\u6b63\u78ba\u306a\u88fd\u54c1\u63a8\u5968\u3001\u30b7\u30fc\u30e0\u30ec\u30b9\u306a\u6ce8\u6587\u30d7\u30ed\u30bb\u30b9\u306a\u3069\u3001\u304a\u63a2\u3057\u306e\u3082\u306e\u304c\u4f55\u3067\u3042\u308c\u3001\u5f53\u793e\u306e\u30c1\u30fc\u30e0\u304c\u304a\u624b\u4f1d\u3044\u3057\u307e\u3059\u3002\u4eca\u3059\u3050\u304a\u554f\u3044\u5408\u308f\u305b\u3044\u305f\u3060\u304d\u30014340 \u5408\u91d1\u92fc\u304c\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u3001\u6210\u529f\u306b\u5c0e\u304f\u65b9\u6cd5\u3092\u3054\u78ba\u8a8d\u304f\u3060\u3055\u3044\u3002<\/p><p><\/p>","protected":false},"excerpt":{"rendered":"<p>4340 alloy steel is known for its versatility and strength, making it an ideal choice for high-performance components like gears 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