I replied in surprise, \u201cYou\u2019re already here at Yuhui Die Steel<\/strong>? It\u2019s the weekend, so the workshop isn\u2019t open, but I\u2019m at the factory.\u201d<\/p>\n\n\n\n After hanging up, I immediately went to pick him up. I was a bit puzzled\u2014he hadn\u2019t contacted me beforehand, so how did he find the factory so precisely?<\/p>\n\n\n\n \u00a0After picking him up and seeing the product, I learned that he runs a hardware factory in Liaobu. He used to do stamping, but now he\u2019s received an order for a cold-extruded product in a fairly large quantity. Although he\u2019s never made cold-extruded products before, he wanted to give it a try. The cold extrusion involves small 12-diameter 6-series aluminum rods. The product doesn\u2019t look complicated, but after making two sets of dies using SKD11<\/a><\/strong> with a hardness of HRC 50, they could only produce a few pieces. When they increased the hardness, the dies cracked immediately, and production stalled. He reached out to many people, but no one could solve the problem. He visited friends in Chang\u2019an and Dongkeng and consulted numerous others, but none seemed reliable. After countless revisions to the dies, he was at a loss as to what to do. He was even willing to hand the dies over to someone else if anyone would take them on. Finally, someone told him, \u201cThere\u2019s a supplier in Liaobu who specializes in materials for cold extrusion dies\u2014go straight to him; he should have a solution.\u201d So he went straight to their shop.<\/p>\n\n\n\n SKD11 die steel<\/strong> used for cold-extruded aluminum profiles\u2014even if the die doesn\u2019t crack\u2014is prone to aluminum shavings sticking to it and causing stringing, which makes production difficult. If you use the wrong material, it becomes very hard to fix later on; by the end, you\u2019ll even feel like giving up.<\/p>\n\n\n\n \u00a0I showed the two of them many samples, explained numerous case studies and phenomena related to cold extrusion of aluminum, and introduced the high-toughness\u00a0LG die steel<\/a><\/strong>\u00a0they were interested in.<\/p>\n\n\n\n They were particularly amazed and convinced after watching a video showing LG bending without breaking, and ultimately purchased the high-toughness LG die steel<\/strong>.<\/p>\n\n\n\n LG is a proprietary high-toughness die steel developed by Yuhui Company. Its toughness is 8 to 9 times that of DC53, with a hardness of HRC 54\u201358. It\u2019s so tough that it won\u2019t break even when bent by hand. For cold extrusion dies for aluminum, this die steel is the ultimate choice.<\/p>\n\n\n\n *************<\/p>\n\n\n\n![\"\"](\"https:\/\/www.wudejiansteel.com\/wp-content\/uploads\/2026\/07\/\u51b7\u6324\u538b\u94dd\u7528H13\uff0cDC53\uff0cSKH-9\u90fd\u662f\u4e0d\u8010\u7528\uff0c\u5f88\u5feb\u5f00\u88c2.jpg\")
<\/figure>\n\n\n\n