{"id":28110,"date":"2026-01-02T12:15:44","date_gmt":"2026-01-02T12:15:44","guid":{"rendered":"https:\/\/leweiprecision.com\/?p=28110"},"modified":"2026-02-04T12:15:31","modified_gmt":"2026-02-04T12:15:31","slug":"4340-%e9%92%a2%e6%80%a7%e8%83%bd%e5%ba%94%e7%94%a8%e5%92%8c%e6%9c%ba%e5%8a%a0%e5%b7%a5%e5%ae%8c%e6%95%b4%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/leweiprecision.com\/zh\/4340-%e9%92%a2%e6%80%a7%e8%83%bd%e5%ba%94%e7%94%a8%e5%92%8c%e6%9c%ba%e5%8a%a0%e5%b7%a5%e5%ae%8c%e6%95%b4%e6%8c%87%e5%8d%97\/","title":{"rendered":"4340 \u94a2\uff1a\u7279\u6027\u3001\u5e94\u7528\u548c\u52a0\u5de5\u5b8c\u5168\u6307\u5357"},"content":{"rendered":"<h2 class=\"wp-block-heading\"><strong>\u5bfc\u8a00<\/strong><\/h2>\n\n\n\n<p>\u60a8\u662f\u5426\u5728\u5236\u9020\u5fc5\u987b\u627f\u53d7\u6781\u5927\u5e94\u529b\u800c\u4e0d\u4f1a\u65ad\u88c2\u7684\u90e8\u4ef6\uff1f <strong><a href=\"https:\/\/leweiprecision.com\/zh\/%e6%9c%8d%e5%8a%a1\/%e7%b2%be%e5%af%86%e6%9c%ba%e6%a2%b0%e5%8a%a0%e5%b7%a5\/\">4340 \u94a2<\/a><\/strong> \u53ef\u80fd\u5c31\u662f\u4f60\u7684\u7b54\u6848\u3002\u8fd9\u79cd\u9ad8\u5f3a\u5ea6\u5408\u91d1\u53ef\u4ee5\u80dc\u4efb\u98de\u673a\u3001\u6c7d\u8f66\u548c\u673a\u5668\u4e2d\u7684\u8270\u82e6\u5de5\u4f5c\u3002\u5728\u672c\u6307\u5357\u4e2d\uff0c\u60a8\u5c06\u4e86\u89e3\u5230\u5b83\u7684\u6784\u6210\u3001\u4e3b\u8981\u7279\u6027\u4ee5\u53ca\u5982\u4f55\u6b63\u786e\u4f7f\u7528\u3002<\/p>\n\n\n\n<p>\u60a8\u5c06\u4e86\u89e3\u4e3a\u4ec0\u4e48\u5b83\u662f\u5f3a\u5ea6\u548c\u97e7\u6027\u7684\u9996\u9009\u3002\u6211\u4eec\u5c06\u4ecb\u7ecd\u52a0\u5de5\u6280\u5de7\uff0c\u5c24\u5176\u662f\u9488\u5bf9\u4ee5\u4e0b\u65b9\u9762\u7684\u6280\u5de7 <strong><a href=\"https:\/\/leweiprecision.com\/zh\/%e6%9c%8d%e5%8a%a1\/%e6%95%b0%e6%8e%a7%e5%8a%a0%e5%b7%a5\/\">\u6570\u63a7\u52a0\u5de5\u670d\u52a1 <\/a><\/strong>4340 \u94a2\uff0c\u5e2e\u52a9\u60a8\u907f\u514d\u5e38\u89c1\u9677\u9631\u3002\u6b64\u5916\uff0c\u60a8\u8fd8\u53ef\u4ee5\u83b7\u5f97\u6709\u5173\u6210\u672c\u548c\u9879\u76ee\u9009\u62e9\u7684\u5efa\u8bae\u3002\u6700\u540e\uff0c\u60a8\u5c06\u77e5\u9053 4340 \u662f\u5426\u9002\u5408\u60a8\u7684\u9700\u6c42\u3002\u8fd9\u5f88\u91cd\u8981\uff0c\u56e0\u4e3a\u9009\u62e9\u6b63\u786e\u7684\u94a2\u6750\u53ef\u4ee5\u8282\u7701\u65f6\u95f4\u548c\u91d1\u94b1\uff0c\u540c\u65f6\u63d0\u9ad8\u5b89\u5168\u6027\u3002\u4f8b\u5982\uff0c\u5728\u822a\u7a7a\u822a\u5929\u9886\u57df\uff0c\u4f7f\u7528 4340 \u94a2\u7684 CNC \u52a0\u5de5\u670d\u52a1\u53ef\u786e\u4fdd\u96f6\u4ef6\u5728\u9ad8\u8d1f\u8377\u4e0b\u7684\u4f7f\u7528\u5bff\u547d\u66f4\u957f\u3002\u8ba9\u6211\u4eec\u6df1\u5165\u4e86\u89e3\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4ec0\u4e48\u662f 4340 \u94a2\uff1f<\/strong><\/h2>\n\n\n\n<p>4340 \u94a2\u662f\u4e00\u79cd\u4f4e\u5408\u91d1\u94a2\uff0c\u4ee5\u9ad8\u5f3a\u5ea6\u548c\u9ad8\u97e7\u6027\u8457\u79f0\u3002\u5b83\u542b\u6709\u954d\u3001\u94ec\u548c\u94bc\uff0c\u8fd9\u4f7f\u5176\u5728\u666e\u901a\u78b3\u94a2\u4e2d\u8131\u9896\u800c\u51fa\u3002\u5b83\u7ecf\u5e38\u7528\u4e8e\u9700\u8981\u6297\u75b2\u52b3\u548c\u6297\u51b2\u51fb\u7684\u96f6\u4ef6\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u4e3a\u4ec0\u4e48\u9009\u62e9 4340 \u800c\u4e0d\u662f\u5176\u4ed6\u94a2\u6750\uff1f<\/strong><\/h3>\n\n\n\n<p>\u5b83\u5177\u6709\u66f4\u597d\u7684\u6dec\u900f\u6027\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u5728\u8f83\u539a\u7684\u90e8\u5206\u4e5f\u80fd\u83b7\u5f97\u5747\u5300\u7684\u5f3a\u5ea6\u3002\u8fd9\u5bf9\u4e8e\u9700\u8981\u5747\u5300\u5f3a\u5ea6\u7684\u5927\u578b\u9879\u76ee\u5f88\u6709\u5e2e\u52a9\u3002\u4e0e\u4f4e\u78b3\u94a2\u4e0d\u540c\uff0c4340 \u53ef\u4ee5\u5f88\u597d\u5730\u8fdb\u884c\u70ed\u5904\u7406\uff0c\u4ee5\u83b7\u5f97\u5b9a\u5236\u7279\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u7b80\u53f2\u548c\u6807\u51c6<\/strong><\/h3>\n\n\n\n<p>4340 \u5f00\u53d1\u4e8e 20 \u4e16\u7eaa\u521d\uff0c\u7b26\u5408 AISI \u6807\u51c6\u3002\u5b83\u4e5f\u88ab\u79f0\u4e3a UNS G43400\u30022024 \u5e74\uff0c\u5168\u7403\u94a2\u4ea7\u91cf\u5c06\u8fbe\u5230 18.3 \u4ebf\u5428\uff0c\u5176\u4e2d 4340 \u7b49\u5408\u91d1\u7684\u9ad8\u7ea7\u7528\u9014\u9700\u6c42\u5c06\u4e0d\u65ad\u589e\u957f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>4340 \u94a2\u7684\u5316\u5b66\u6210\u5206<\/strong><\/h2>\n\n\n\n<p>4340 \u94a2\u7684\u7ed3\u6784\u8d4b\u4e88\u4e86\u5b83\u5f3a\u5927\u7684\u529b\u91cf\u3002\u94c1\u5360 95-96%\u3002\u5176\u4ed6\u5143\u7d20\u589e\u52a0\u4e86\u5f3a\u5ea6\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u5173\u952e\u8981\u7d20\u53ca\u5176\u4f5c\u7528<\/strong><\/h3>\n\n\n\n<p>\u78b3\uff080.38-0.43%\uff09\u53ef\u63d0\u9ad8\u786c\u5ea6\u3002\u954d\uff081.65-2.00%\uff09\u53ef\u63d0\u9ad8\u97e7\u6027\u3002\u94ec\uff080.70-0.90%\uff09\u53ef\u63d0\u9ad8\u8010\u8150\u8680\u6027\u3002\u94bc\uff080.20-0.30%\uff09\u53ef\u6297\u78e8\u635f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u6784\u6210\u8868<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>\u8981\u7d20<\/strong><\/td><td><strong>\u767e\u5206\u6bd4 (%)<\/strong><\/td><\/tr><tr><td>\u78b3 (C)<\/td><td>0.38-0.43<\/td><\/tr><tr><td>\u9530 (Mn)<\/td><td>0.60-0.80<\/td><\/tr><tr><td>\u954d (Ni)<\/td><td>1.65-2.00<\/td><\/tr><tr><td>\u94ec (Cr)<\/td><td>0.70-0.90<\/td><\/tr><tr><td>\u94bc\uff08Mo\uff09<\/td><td>0.20-0.30<\/td><\/tr><tr><td>\u7845 (Si)<\/td><td>0.15-0.30<\/td><\/tr><tr><td>\u94c1\uff08Fe\uff09<\/td><td>\u5e73\u8861<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u8fd9\u79cd\u6df7\u5408\u7269\u53ef\u786e\u4fdd\u8f83\u9ad8\u7684\u62c9\u4f38\u5f3a\u5ea6\uff0c\u5904\u7406\u540e\u7ea6\u4e3a 125,000 psi\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>4340 \u94a2\u7684\u4e3b\u8981\u7279\u6027<\/strong><\/h2>\n\n\n\n<p>4340 \u5728\u673a\u68b0\u6d4b\u8bd5\u4e2d\u5927\u653e\u5f02\u5f69\u3002\u5b83\u5728\u5e94\u529b\u4f5c\u7528\u4e0b\u4e0d\u6613\u65ad\u88c2\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u7269\u7406\u7279\u6027<\/strong><\/h3>\n\n\n\n<p>\u5bc6\u5ea6\u4e3a 0.284 \u78c5\/\u82f1\u5bf8\u00b3\u3002\u7194\u70b9\u9ad8\u8fbe 2,600 \u534e\u6c0f\u5ea6\u3002\u5b83\u5177\u6709\u94c1\u78c1\u6027\uff0c\u56e0\u6b64\u78c1\u94c1\u80fd\u7c98\u4f4f\u5b83\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u673a\u68b0\u6027\u80fd<\/strong><\/h3>\n\n\n\n<p>\u5c48\u670d\u5f3a\u5ea6\u8fbe\u5230 125,000 psi\u3002\u9000\u706b\u72b6\u6001\u4e0b\u7684\u786c\u5ea6\u4e3a\u6d1b\u6c0f\u786c\u5ea6 B 100\u3002\u5b83\u5177\u6709\u826f\u597d\u7684\u6297\u75b2\u52b3\u6027\uff0c\u9002\u5408\u5236\u9020\u957f\u5bff\u547d\u96f6\u4ef6\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u5c5e\u6027\u8868<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>\u7269\u4e1a<\/strong><\/td><td><strong>\u4ef7\u503c<\/strong><\/td><\/tr><tr><td>\u5bc6\u5ea6<\/td><td>0.284 \u78c5\/\u82f1\u5bf8<\/td><\/tr><tr><td>\u5c48\u670d\u5f3a\u5ea6<\/td><td>125,000 psi<\/td><\/tr><tr><td>\u62c9\u4f38\u5f3a\u5ea6<\/td><td>150,000-280,000 psi<\/td><\/tr><tr><td>\u786c\u5ea6\uff08\u6d1b\u6c0f\u786c\u5ea6\uff09<\/td><td>B 100\uff08\u9000\u706b\uff09<\/td><\/tr><tr><td>\u5bfc\u70ed\u6027<\/td><td>309 Btu-in\/hr-ft\u00b2-\u00b0F<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u8fd9\u4e9b\u7279\u6027\u4f7f\u5176\u6210\u4e3a\u9ad8\u8d1f\u8377\u5de5\u4f5c\u7684\u7406\u60f3\u9009\u62e9\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/leweiprecision.com\/wp-content\/uploads\/2026\/01\/AISI-4340-bright-steel-bar.jpg\" alt=\"4340 \u94a2\u7684\u4e3b\u8981\u7279\u6027\" class=\"wp-image-28114\" style=\"width:800px;height:auto\" srcset=\"https:\/\/leweiprecision.com\/wp-content\/uploads\/2026\/01\/AISI-4340-bright-steel-bar.jpg 600w, https:\/\/leweiprecision.com\/wp-content\/uploads\/2026\/01\/AISI-4340-bright-steel-bar-300x200.jpg 300w, https:\/\/leweiprecision.com\/wp-content\/uploads\/2026\/01\/AISI-4340-bright-steel-bar-18x12.jpg 18w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>4340 \u94a2\u662f\u5982\u4f55\u5236\u9020\u7684\uff1f<\/strong><\/h2>\n\n\n\n<p>\u5236\u9020 4340 \u9996\u5148\u8981\u7194\u5316\u539f\u6750\u6599 <strong><a href=\"https:\/\/leweiprecision.com\/zh\/%e6%9d%90%e6%96%99\/\">\u6750\u6599<\/a><\/strong>.\u8be5\u5de5\u827a\u53ef\u786e\u4fdd\u7eaf\u5ea6\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u9010\u6b65\u5236\u9020\u6d41\u7a0b<\/strong><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5728\u7535\u7089\u4e2d\u7194\u5316\u94c1\u548c\u5408\u91d1\u957f\u8fbe 12 \u5c0f\u65f6\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528\u771f\u7a7a\u6c27\u6c14\u8131\u78b3\u6765\u63a7\u5236\u78b3\u3002<\/li>\n\n\n\n<li>\u6405\u62cc\u5e76\u51b7\u5374\u6210\u576f\u3002<\/li>\n\n\n\n<li>\u70ed\u8f67\u6216\u51b7\u8f67\u6210\u578b\u3002<\/li>\n\n\n\n<li>\u70ed\u5904\u7406\u4ee5\u83b7\u5f97\u6700\u7ec8\u6027\u80fd\u3002<\/li>\n\n\n\n<li>\u5207\u5272\u548c\u629b\u5149\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u8fd9\u6837\u5c31\u80fd\u751f\u4ea7\u51fa\u575a\u56fa\u3001\u5747\u5300\u7684\u94a2\u6750\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u5e38\u89c1\u5f62\u5f0f\u548c\u70ed\u5904\u7406<\/strong><\/h2>\n\n\n\n<p>4340 \u6709\u5404\u79cd\u5f62\u72b6\u3002\u5904\u7406\u65b9\u6cd5\u4f1a\u6539\u53d8\u5176\u7279\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u53ef\u7528\u8868\u683c<\/strong><\/h3>\n\n\n\n<p>\u60a8\u53ef\u4ee5\u83b7\u5f97\u677f\u6750\uff080.018-0.25 \u82f1\u5bf8\u539a\uff09\u3001\u68d2\u6750\u6216\u677f\u6750\u3002\u70ed\u8f67\u5177\u6709\u97e7\u6027\uff0c\u51b7\u62d4\u5177\u6709\u5f3a\u5ea6\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u70ed\u5904\u7406\u7684\u91cd\u8981\u6027<\/strong><\/h3>\n\n\n\n<p>\u5b83\u80fd\u63d0\u9ad8\u786c\u5ea6\u3002\u9000\u706b\u540e\u6613\u4e8e\u52a0\u5de5\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4f7f\u7528 4340 \u94a2\u7684\u5e94\u7528\u548c\u884c\u4e1a<\/strong><\/h2>\n\n\n\n<p>4340 \u9002\u7528\u4e8e\u5f3a\u5ea6\u8981\u6c42\u9ad8\u7684\u573a\u5408\u3002\u5b83\u5728\u6076\u52a3\u73af\u5883\u4e2d\u5f88\u5e38\u89c1\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u9876\u7ea7\u884c\u4e1a<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u822a\u7a7a\u822a\u5929\u5de5\u4e1a\uff1a\u6ce2\u97f3\u55b7\u6c14\u673a\u7b49\u98de\u673a\u7684\u8d77\u843d\u67b6\u548c\u8f74\u3002<\/li>\n\n\n\n<li>\u6c7d\u8f66\u5de5\u4e1a\uff1a\u5361\u8f66\u66f2\u8f74\u548c\u8f66\u8f74\u3002<\/li>\n\n\n\n<li>\u77f3\u6cb9\u548c\u5929\u7136\u6c14\u5de5\u4e1a\uff1a\u94bb\u94e4\u548c\u6cf5<\/li>\n\n\n\n<li>\u56fd\u9632\uff1a\u67aa\u7ba1\u548c\u8f66\u8f86\u90e8\u4ef6<\/li>\n\n\n\n<li>\u5236\u9020\uff1a\u9f7f\u8f6e\u548c\u7d27\u56fa\u4ef6<\/li>\n<\/ul>\n\n\n\n<p>2025 \u5e74\uff0c\u8fd9\u4e9b\u884c\u4e1a\u7684\u94a2\u6750\u9700\u6c42\u6bcf\u5e74\u589e\u957f 5.9%\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u771f\u5b9e\u6848\u4f8b<\/strong><\/h3>\n\n\n\n<p>\u6ce2\u97f3\u516c\u53f8\u5c06\u5176\u7528\u4e8e\u98de\u673a\u96f6\u90e8\u4ef6\u3002\u798f\u7279\u5c06\u5176\u5e94\u7528\u4e8e\u9ad8\u6027\u80fd\u53d1\u52a8\u673a\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>4340 \u94a2\u7684\u4f18\u7f3a\u70b9<\/strong><\/h2>\n\n\n\n<p>\u9009\u62e9\u524d\u6743\u8861\u5229\u5f0a\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u4f18\u70b9<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9ad8\u6297\u75b2\u52b3\u6027\uff0c\u53ef\u627f\u53d7\u53cd\u590d\u5e94\u529b\u3002<\/li>\n\n\n\n<li>\u4f18\u5f02\u7684\u6297\u51b2\u51fb\u548c\u6297\u9707\u5f3a\u5ea6\u3002<\/li>\n\n\n\n<li>\u826f\u597d\u7684\u8010\u78e8\u6027\u3002<\/li>\n\n\n\n<li>\u70ed\u5904\u7406\u7528\u9014\u5e7f\u6cdb\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u7f3a\u70b9<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65e0\u6d82\u5c42\u65f6\u8010\u8150\u8680\u6027\u5dee\u3002<\/li>\n\n\n\n<li>\u6bd4\u4f4e\u78b3\u94a2\u66f4\u96be\u52a0\u5de5\u3002<\/li>\n\n\n\n<li>\u6bd4\u67d0\u4e9b\u5408\u91d1\u91cd\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u6dec\u706b\u9519\u8bef\uff0c\u4f1a\u6709\u5f00\u88c2\u7684\u98ce\u9669\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u52a0\u5de5 4340 \u94a2\uff1a\u6210\u529f\u52a0\u5de5 CNC \u7684\u6280\u5de7<\/strong><\/h2>\n\n\n\n<p>\u52a0\u5de5 4340 \u9700\u8981\u5c0f\u5fc3\u8c28\u614e\u3002\u5b83\u7684\u786c\u5ea6\u4f1a\u78e8\u635f\u5de5\u5177\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u6700\u4f73 CNC \u5b9e\u8df5<\/strong><\/h3>\n\n\n\n<p>\u4f7f\u7528\u786c\u8d28\u5408\u91d1\u5de5\u5177\u4ee5\u5ef6\u957f\u4f7f\u7528\u5bff\u547d\u3002\u5c06\u901f\u5ea6\u4fdd\u6301\u5728 710-950 SFM\uff0c\u4ee5\u4fbf <strong><a href=\"https:\/\/leweiprecision.com\/zh\/%e6%9c%8d%e5%8a%a1\/%e6%95%b0%e6%8e%a7%e8%bd%a6%e5%89%8a\/\">\u8f6c\u5f2f<\/a><\/strong>.\u6d82\u62b9\u51b7\u5374\u5242\u4ee5\u907f\u514d\u52a0\u5de5\u786c\u5316\u3002<\/p>\n\n\n\n<p><strong>\u4e13\u4e1a\u63d0\u793a<\/strong> \u5148\u7c97\u5207\u5272\uff0c\u540e\u7cbe\u52a0\u5de5\uff0c\u4ee5\u9632\u53d8\u5f62\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u5e94\u907f\u514d\u7684\u5e38\u89c1\u9519\u8bef<\/strong><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6f0f\u52a0\u51b7\u5374\u6db2 - \u5bfc\u81f4\u5de5\u5177\u78e8\u635f\u3002<\/li>\n\n\n\n<li>\u9ad8\u901f - \u5bfc\u81f4\u8868\u9762\u786c\u5316\u3002<\/li>\n\n\n\n<li>\u949d\u5316\u5de5\u5177 - \u9020\u6210\u7c97\u7cd9\u7684\u8868\u9762\u6548\u679c\u3002<\/li>\n\n\n\n<li>\u5ffd\u89c6\u538b\u529b\u7f13\u89e3--\u96f6\u4ef6\u626d\u66f2\u3002<\/li>\n\n\n\n<li>\u4e24\u6b21\u4f20\u7403\u4e4b\u95f4\u6ca1\u6709\u91cd\u65b0\u786e\u8ba4--\u51c6\u786e\u7387\u4e0b\u964d\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u6309\u7167\u8fd9\u4e9b\u65b9\u6cd5\u8fdb\u884c\u64cd\u4f5c\uff0c\u6548\u679c\u4f1a\u5f88\u597d\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u5982\u4f55\u9010\u6b65\u70ed\u5904\u7406 4340 \u94a2<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u8fc7\u7a0b\u8bf4\u660e<\/strong><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u9884\u70ed\u81f3 500-550\u00b0C \u4ee5\u51cf\u5c11\u5e94\u529b\u3002<\/li>\n\n\n\n<li>\u5728 790-915\u00b0C \u4e0b\u5965\u6c0f\u4f53\u5316 1-2 \u5c0f\u65f6\u3002<\/li>\n\n\n\n<li>\u5728\u6cb9\u4e2d\u6216\u7a7a\u6c14\u4e2d\u6dec\u706b\u3002<\/li>\n\n\n\n<li>\u5728 450-650\u00b0C \u4e0b\u56de\u706b\uff0c\u4ee5\u83b7\u5f97\u97e7\u6027\u3002<\/li>\n\n\n\n<li>\u7a7a\u6c14\u51c9\u723d<\/li>\n<\/ol>\n\n\n\n<p>\u8fd9\u4f7f\u5f97\u5f3a\u5ea6\u548c\u5ef6\u5c55\u6027\u8fbe\u5230\u4e86\u5e73\u8861\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>4340 \u94a2\u4e0e\u5176\u4ed6\u5408\u91d1\u7684\u6bd4\u8f83<\/strong><\/h2>\n\n\n\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5bfb\u627e <strong><a href=\"https:\/\/leweiprecision.com\/zh\/%e6%9c%8d%e5%8a%a1\/%e7%b2%be%e5%af%86%e6%9c%ba%e6%a2%b0%e5%8a%a0%e5%b7%a5\/\">\u7cbe\u5bc6\u52a0\u5de5\u670d\u52a1<\/a><\/strong> \u4ee5\u5904\u7406\u5404\u79cd\u5408\u91d1\u3001 <strong>4340 \u94a2<\/strong> \u4e0e\u5176\u4ed6\u94a2\u6750\u76f8\u6bd4\uff0c\u5176\u97e7\u6027\u66f4\u4e3a\u7a81\u51fa\uff0c\u4f8b\u5982 <strong>4140<\/strong> \u6216 <strong>4330<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u4e0e4140 \u94a2<\/strong><\/h3>\n\n\n\n<p>4340 \u954d\u542b\u91cf\u66f4\u9ad8\uff0c\u97e7\u6027\u66f4\u597d\u30024140 \u66f4\u4fbf\u5b9c\uff0c\u4f46\u539a\u90e8\u4ef6\u7684\u5f3a\u5ea6\u8f83\u4f4e\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u4e0e4330 \u94a2<\/strong><\/h3>\n\n\n\n<p>4330 \u7684\u5f3a\u5ea6\u66f4\u9ad8\uff0c\u4f46\u6210\u672c\u66f4\u9ad8\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u5bf9\u7167\u8868<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>\u5408\u91d1<\/strong><\/td><td><strong>\u5f3a\u5ea6\uff08\u78c5\/\u5e73\u65b9\u82f1\u5bf8\uff09<\/strong><\/td><td><strong>\u97e7\u6027<\/strong><\/td><td><strong>\u8d39\u7528<\/strong><\/td><\/tr><tr><td>4340<\/td><td>125,000<\/td><td>\u9ad8<\/td><td>\u4e2d\u578b<\/td><\/tr><tr><td>4140<\/td><td>95,000<\/td><td>\u4e2d\u578b<\/td><td>\u4f4e<\/td><\/tr><tr><td>4330<\/td><td>140,000<\/td><td>\u9ad8<\/td><td>\u9ad8<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u6839\u636e\u9700\u6c42\u8fdb\u884c\u9009\u62e9\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u5982\u4f55\u4e3a\u60a8\u7684\u9879\u76ee\u9009\u62e9 4340 \u94a2<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"687\" src=\"https:\/\/leweiprecision.com\/wp-content\/uploads\/2026\/01\/69efdae9-e94c-4805-afda-3cbf3d2eb117-1024x687.jpg\" alt=\"\u5982\u4f55\u4e3a\u60a8\u7684\u9879\u76ee\u9009\u62e9 4340 \u94a2\" class=\"wp-image-28115\" srcset=\"https:\/\/leweiprecision.com\/wp-content\/uploads\/2026\/01\/69efdae9-e94c-4805-afda-3cbf3d2eb117-1024x687.jpg 1024w, https:\/\/leweiprecision.com\/wp-content\/uploads\/2026\/01\/69efdae9-e94c-4805-afda-3cbf3d2eb117-300x201.jpg 300w, https:\/\/leweiprecision.com\/wp-content\/uploads\/2026\/01\/69efdae9-e94c-4805-afda-3cbf3d2eb117-768x516.jpg 768w, https:\/\/leweiprecision.com\/wp-content\/uploads\/2026\/01\/69efdae9-e94c-4805-afda-3cbf3d2eb117-18x12.jpg 18w, https:\/\/leweiprecision.com\/wp-content\/uploads\/2026\/01\/69efdae9-e94c-4805-afda-3cbf3d2eb117.jpg 1168w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u9700\u8981\u8003\u8651\u7684\u56e0\u7d20<\/strong><\/h3>\n\n\n\n<p>\u68c0\u67e5\u8d1f\u8f7d\u8981\u6c42\u3002\u9700\u8981\u9ad8\u75b2\u52b3\u5ea6\uff1f\u9009\u62e9 4340\u3002\u9884\u7b97\u7d27\u5f20\uff1f\u5bfb\u627e\u66ff\u4ee3\u54c1\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u5feb\u901f\u53c2\u8003\u6e05\u5355<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u60a8\u7684\u90e8\u95e8\u9762\u4e34\u7684\u538b\u529b\u5927\u5417\uff1f<\/li>\n\n\n\n<li>\u9700\u8981\u6df1\u5ea6\u786c\u5316\uff1f<\/li>\n\n\n\n<li>\u52a0\u5de5\u9884\u7b97\uff1f<\/li>\n\n\n\n<li>\u62c5\u5fc3\u8150\u8680\uff1f\u6dfb\u52a0\u6d82\u5c42\u3002<\/li>\n\n\n\n<li>\u9879\u76ee\u5c3a\u5bf8\uff1a\u539a\u7684\u90e8\u5206\u6548\u679c\u5f88\u597d\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u6709\u52a9\u4e8e\u60a8\u505a\u51fa\u660e\u667a\u7684\u51b3\u5b9a\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>4340 \u94a2\u7684\u6210\u672c\u8003\u8651\u56e0\u7d20<\/strong><\/h2>\n\n\n\n<p>\u8d39\u7528\u56e0\u5f62\u5f0f\u548c\u6570\u91cf\u800c\u5f02\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u5f00\u652f\u7ec6\u76ee<\/strong><\/h3>\n\n\n\n<p>\u539f\u6750\u6599\uff1a2025 \u5e74\u6bcf\u78c5 $1-2\u3002\u673a\u52a0\u5de5\u6bcf\u78c5\u589e\u52a0 $0.50-1\u3002\u70ed\u5904\u7406\uff1a$0.20-0.50\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u5f71\u54cd\u4ef7\u683c\u7684\u56e0\u7d20<\/strong><\/h3>\n\n\n\n<p>\u6279\u91cf\u6298\u6263\u964d\u4f4e\u4e86\u6210\u672c\u3002\u51b7\u62d4\u6bd4\u70ed\u8f67\u4ef7\u683c\u9ad8\u30022025 \u5e74\uff0c\u5408\u91d1\u9644\u52a0\u8d39\u5e73\u5747\u4e3a\u6bcf\u78c5 $0.46-0.54\u3002<\/p>\n\n\n\n<p>[\u5efa\u8bae\u4fe1\u606f\u56fe\u8868\uff1a4340 \u8868\u683c\u6210\u672c\u6bd4\u8f83\u56fe\uff3d<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e3b\u8981\u6536\u83b7<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>4340 \u94a2\u5177\u6709\u9ad8\u5f3a\u5ea6\u548c\u9ad8\u97e7\u6027\uff0c\u53ef\u6ee1\u8db3\u82db\u523b\u7684\u4f7f\u7528\u8981\u6c42\u3002<\/li>\n\n\n\n<li>\u4e3b\u8981\u6210\u52060.38-0.43% \u78b3\uff0c1.65-2% \u954d\u3002<\/li>\n\n\n\n<li>\u6700\u9002\u7528\u4e8e\u822a\u7a7a\u822a\u5929\u3001\u6c7d\u8f66\u3001\u77f3\u6cb9\u548c\u5929\u7136\u6c14\u884c\u4e1a\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528\u786c\u8d28\u5408\u91d1\u5de5\u5177\u548c\u51b7\u5374\u6db2\u8fdb\u884c\u52a0\u5de5\uff0c\u4ee5\u907f\u514d\u51fa\u73b0\u95ee\u9898\u3002<\/li>\n\n\n\n<li>\u8fdb\u884c\u9002\u5f53\u7684\u70ed\u5904\u7406\uff0c\u4ee5\u83b7\u5f97\u6700\u4f73\u6027\u80fd\u3002<\/li>\n\n\n\n<li>\u6bcf\u78c5\u6210\u672c $1-2\uff1b\u52a0\u5de5\u56e0\u7d20\u3002<\/li>\n\n\n\n<li>\u9700\u8981\u6297\u75b2\u52b3\u7684\u9879\u76ee\u53ef\u4ee5\u9009\u62e9\u5b83\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u7ed3\u8bba<\/strong><\/h2>\n\n\n\n<p>4340 \u94a2\u53ef\u4e3a\u5173\u952e\u96f6\u4ef6\u63d0\u4f9b\u9876\u7ea7\u5f3a\u5ea6\u3002\u60a8\u5df2\u7ecf\u4e86\u89e3\u4e86\u5b83\u7684\u7279\u6027\u3001\u7528\u9014\u548c\u52a0\u5de5\u6280\u5de7\u3002\u5b83\u5728\u822a\u7a7a\u822a\u5929\u548c\u6c7d\u8f66\u7b49\u82db\u523b\u9886\u57df\u8868\u73b0\u51fa\u8272\u3002\u8bf7\u8bb0\u4f4f\uff0c\u8981\u83b7\u5f97\u6700\u4f73\u6548\u679c\uff0c\u5fc5\u987b\u4ed4\u7ec6\u8fdb\u884c\u70ed\u5904\u7406\u548c\u52a0\u5de5\u3002\u5982\u679c\u60a8\u9700\u8981 4340 \u94a2\u6570\u63a7\u52a0\u5de5\u670d\u52a1\u65b9\u9762\u7684\u4e13\u5bb6\u5e2e\u52a9\uff0c\u8bf7\u8054\u7cfb\u6211\u4eec\u7684\u56e2\u961f\u5bfb\u6c42\u6307\u5bfc\u3002\u6211\u4eec\u5c06\u4e3a\u60a8\u7684\u9879\u76ee\u63d0\u4f9b\u652f\u6301\u3002<strong><br><\/strong><strong><br><\/strong><strong><br><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5e38\u89c1\u95ee\u9898<br><\/h2>\n\n\n\n<div class=\"wp-block-wpseopress-faq-block-v2 is-layout-flow wp-block-faq-block-v2-is-layout-flow\">\n<details id=\"what-makes-4340-steel-different-from-4140\" class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>4340 \u94a2\u4e0e 4140 \u94a2\u6709\u4f55\u4e0d\u540c\uff1f<\/strong><\/summary>\n<p>4340 \u542b\u6709\u66f4\u591a\u7684\u954d\u548c\u78b3\uff0c\u5728\u5927\u578b\u96f6\u4ef6\u4e2d\u5177\u6709\u66f4\u597d\u7684\u97e7\u6027\u548c\u5f3a\u5ea6\u3002\u5b83\u662f\u9ad8\u5e94\u529b\u5de5\u4f5c\u7684\u7406\u60f3\u6750\u6599\uff0c\u800c 4140 \u5219\u9002\u5408\u8f83\u6e29\u548c\u7684\u7528\u9014\uff0c\u6210\u672c\u8f83\u4f4e\u3002<\/p>\n<\/details>\n\n\n\n<details id=\"is-4340-steel-corrosion-resistant\" class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>4340 \u94a2\u662f\u5426\u8010\u8150\u8680\uff1f<\/strong><\/summary>\n<p>\u4e0d\uff0c\u6ca1\u6709\u4fdd\u62a4\u63aa\u65bd\u5f88\u5bb9\u6613\u751f\u9508\u3002\u5728\u6f6e\u6e7f\u7684\u73af\u5883\u4e2d\uff0c\u53ef\u6dfb\u52a0\u6cb9\u6f06\u6216\u9540\u94ec\u7b49\u6d82\u5c42\u3002\u8fd9\u6837\u53ef\u4ee5\u5ef6\u957f\u6237\u5916\u5e94\u7528\u7684\u4f7f\u7528\u5bff\u547d\u3002<\/p>\n<\/details>\n\n\n\n<details id=\"can-i-weld-4340-steel\" class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>\u53ef\u4ee5\u710a\u63a5 4340 \u94a2\u5417\uff1f<\/strong><\/summary>\n<p>\u53ef\u4ee5\uff0c\u4f46\u8981\u9884\u70ed\u5230 500\u00b0F\uff0c\u5e76\u4f7f\u7528\u4f4e\u6c22\u68d2\u3002\u710a\u540e\u70ed\u5904\u7406\u53ef\u9632\u6b62\u88c2\u7eb9\u3002\u4e00\u5b9a\u8981\u5148\u6d4b\u8bd5\u5c0f\u4ef6\u3002<\/p>\n<\/details>\n\n\n\n<details id=\"what-hardness-can-4340-reach\" class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>4340 \u53ef\u4ee5\u8fbe\u5230\u4ec0\u4e48\u786c\u5ea6\uff1f<\/strong><\/summary>\n<p>\u6dec\u706b\u548c\u56de\u706b\u540e\u53ef\u8fbe\u5230\u6d1b\u6c0f\u786c\u5ea6 C 50\u3002\u9000\u706b\u540e\u7ea6\u4e3a B 100\uff0c\u6613\u4e8e\u52a0\u5de5\u3002<\/p>\n<\/details>\n\n\n\n<details id=\"how-does-heat-treatment-affect-4340\" class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>\u70ed\u5904\u7406\u5bf9 4340 \u6709\u4ec0\u4e48\u5f71\u54cd\uff1f<\/strong><\/summary>\n<p>\u5b83\u80fd\u63d0\u9ad8\u5f3a\u5ea6\u548c\u97e7\u6027\u3002\u6b63\u786e\u7684\u6b65\u9aa4\u53ef\u907f\u514d\u8106\u6027\u3002\u8bf7\u9075\u5faa\u6307\u5bfc\u539f\u5219\uff0c\u4ee5\u83b7\u5f97\u96f6\u4ef6\u7684\u6700\u4f73\u6548\u679c\u3002<\/p>\n<\/details>\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"url\":\"https:\/\/leweiprecision.com\/4340-steel-your-complete-guide-to-properties-applications-and-machining\/\",\"@id\":\"https:\/\/leweiprecision.com\/4340-steel-your-complete-guide-to-properties-applications-and-machining\/\",\"mainEntity\":[{\"@type\":\"Question\",\"url\":\"https:\/\/leweiprecision.com\/4340-steel-your-complete-guide-to-properties-applications-and-machining\/#what-makes-4340-steel-different-from-4140\",\"name\":\"What makes 4340 steel different from 4140?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"&lt;p>4340 has more nickel and carbon for better toughness and strength in large parts. It's ideal for high-stress jobs, while 4140 suits milder uses at lower cost.&lt;\/p>\"}},{\"@type\":\"Question\",\"url\":\"https:\/\/leweiprecision.com\/4340-steel-your-complete-guide-to-properties-applications-and-machining\/#is-4340-steel-corrosion-resistant\",\"name\":\"Is 4340 steel corrosion-resistant?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"&lt;p>No, it rusts easily without protection. Add coatings like paint or chrome for wet environments. This extends life in outdoor applications.&lt;\/p>\"}},{\"@type\":\"Question\",\"url\":\"https:\/\/leweiprecision.com\/4340-steel-your-complete-guide-to-properties-applications-and-machining\/#can-i-weld-4340-steel\",\"name\":\"Can I weld 4340 steel?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"&lt;p>Yes, but preheat to 500\u00b0F and use low-hydrogen rods. Post-weld heat treatment prevents cracks. Always test small pieces first.&lt;\/p>\"}},{\"@type\":\"Question\",\"url\":\"https:\/\/leweiprecision.com\/4340-steel-your-complete-guide-to-properties-applications-and-machining\/#what-hardness-can-4340-reach\",\"name\":\"What hardness can 4340 reach?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"&lt;p>Up to Rockwell C 50 after quenching and tempering. Annealed, it's around B 100 for easy machining.&lt;\/p>\"}},{\"@type\":\"Question\",\"url\":\"https:\/\/leweiprecision.com\/4340-steel-your-complete-guide-to-properties-applications-and-machining\/#how-does-heat-treatment-affect-4340\",\"name\":\"How does heat treatment affect 4340?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"&lt;p>It increases strength and toughness. Proper steps avoid brittleness. Follow guidelines for best results in your parts.&lt;\/p>\"}}]}<\/script><\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction Are you building parts that must handle extreme stress without breaking? 4340 steel might be your answer. This high-strength alloy stands up to tough jobs in planes, cars, and machines. In this guide, you&#8217;ll learn its makeup, key traits, and how to use it right. You&#8217;ll see why it&#8217;s a top pick for strength [&hellip;]<\/p>","protected":false},"author":1,"featured_media":28113,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"4340 Steel: Properties, Uses & Machining Guide","_seopress_titles_desc":"Explore 4340 steel\u2019s composition, strength, uses, and CNC machining tips. Ideal for engineers in aerospace or automotive needing tough materials.","_seopress_robots_index":"","footnotes":""},"categories":[162],"tags":[],"class_list":["post-28110","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-precision-machining"],"acf":[],"_links":{"self":[{"href":"https:\/\/leweiprecision.com\/zh\/wp-json\/wp\/v2\/posts\/28110","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/leweiprecision.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/leweiprecision.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/leweiprecision.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/leweiprecision.com\/zh\/wp-json\/wp\/v2\/comments?post=28110"}],"version-history":[{"count":2,"href":"https:\/\/leweiprecision.com\/zh\/wp-json\/wp\/v2\/posts\/28110\/revisions"}],"predecessor-version":[{"id":28763,"href":"https:\/\/leweiprecision.com\/zh\/wp-json\/wp\/v2\/posts\/28110\/revisions\/28763"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/leweiprecision.com\/zh\/wp-json\/wp\/v2\/media\/28113"}],"wp:attachment":[{"href":"https:\/\/leweiprecision.com\/zh\/wp-json\/wp\/v2\/media?parent=28110"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/leweiprecision.com\/zh\/wp-json\/wp\/v2\/categories?post=28110"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/leweiprecision.com\/zh\/wp-json\/wp\/v2\/tags?post=28110"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}