{"id":1494,"date":"2026-09-01T09:22:55","date_gmt":"2026-09-01T09:22:55","guid":{"rendered":"https:\/\/www.wudejiansteel.com\/?p=1494"},"modified":"2026-09-01T09:22:56","modified_gmt":"2026-09-01T09:22:56","slug":"cold-forging-dies-for-igbt-copper-heat-sinks-yuhui-has-once-again-purchased-32-pieces-of-high-toughness-lg-die-steel-blog-299","status":"publish","type":"post","link":"https:\/\/www.wudejiansteel.com\/?p=1494","title":{"rendered":"Cold-forging dies for IGBT copper heat sinks\u2014Yuhui has once again purchased 32 pieces of high-toughness\u00a0LG die steel.blog\u00a0299"},"content":{"rendered":"\n

We\u2019ve shipped 32 pieces of high-toughness LG hard tool steel<\/a><\/strong>. This is used for the ejector pins in cold-forging dies for copper heat sinks. These dies operate on 3,000- to 5,000-metric-ton hydraulic presses, where the ejector pins at the bottom are subjected to immense stress. When using H13 die steel, the four corners tend to collapse, and the ejector pins are prone to tearing; Using the high-hardness DC53, on the other hand, often leads to mold cracking. We had long been unable to find a suitable mold steel, but since switching to high-toughness\u00a0LG die\u00a0steel<\/a><\/strong>, the service life of the punch has increased exponentially\u2014in optimal conditions, it can produce tens of thousands of products. Because LG has proven to be so effective, the customer has decided to place a bulk order.<\/p>\n\n\n\n

 LG\u2019s toughness is 8\u20139 times that of DC53, with a hardness of 54\u201358 HRC. It\u2019s so tough that you can bend it with a hammer without it breaking. LG not only offers high hardness but also high toughness\u2014qualities that low-hardness H13 cannot match and that high-hardness DC53 cannot achieve simultaneously.<\/p>\n\n\n\n

 If you\u2019re using H13 or DC53 for your punch cores or cold-extrusion dies for red copper, you\u2019re likely to experience die cracking, copper powder adhesion, or entire sections being torn off and fractured. You should try the highly tough LG steel instead.<\/p>\n\n\n\n

 As a viewer in my 299th livestream said, LG steel is the nemesis of red copper. He manufactures cold-extruded copper rods and used to use LD die steel; after 5,000 to 10,000 cycles, the die would become clogged with copper shavings and snap in half. However, by switching to high-toughness LG die steel, the die life jumped to 50,000 cycles. Compared to the previous 5,000\u201310,000 cycles before it snapped in half, the lifespan increased by at least five times. That\u2019s why he said LG dies are virtually indestructible\u2014it\u2019s so hassle-free. LG is the nemesis of red copper.<\/p>\n\n\n\n

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If you\u2019re making cold extrusion or cold forging dies for red copper heat sinks, and your current dies are prone to cracking or sticking with copper powder\u2014problems you\u2019ve been unable to solve\u2014then you should try the high-toughness LG steel. Its toughness is 8\u20139 times that of DC53, with a hardness of 54\u201358 HRC. It\u2019s so tough that it won\u2019t break even if you bend it with a hammer. Use LG die steel<\/strong> for mold cracking\u2014it\u2019s like stepping into a liberated zone.<\/p>\n\n\n\n

 I\u2019m Wu Dejian, the \u201cKing of Die Steel,\u201d from Dongguan Yuhui Die Steel. Yuhui Die Steel is used by three Fortune 500 companies, and Kyocera has been sourcing it for seven consecutive years. If you\u2019re unsure about which die steel to choose, or if the die steel you\u2019re currently using results in short mold lifespans and you don\u2019t know which one to switch to, come talk to me.<\/p>\n\n\n\n

 I\u2019ve already helped over 4,000 companies solve complex problems related to mold material selection, manufacturing, and usage. I\u2019m confident that when it comes to selecting and applying mold steel, I can serve as your chief advisor and help you avoid costly trial-and-error.<\/p>\n\n\n\n

*************<\/p>\n\n\n\n

Wu Dejian’s <\/strong>tool<\/strong> steel<\/strong>, the chief of staff of the user, bought everything he had used.<\/p>\n","protected":false},"excerpt":{"rendered":"

We\u2019ve shipped 32 pieces of high-toughness LG hard tool steel. This is used for the ejector pins in cold-forging dies for copper heat sinks. These dies operate on 3,000- to 5,000-metric-ton hydraulic presses, where the ejector pins at the bottom are subjected to immense stress. When using H13 die steel, the four corners tend to […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1494","post","type-post","status-publish","format-standard","hentry","category-blog"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t