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<\/figure>\n\n\n\nMr. Lan is cold heading 20-diameter hex bolts with 70 teeth on the back of the bolt. He is currently using tungsten carbide as the die insert material. The die is secured with a clamping sleeve, but the teeth are prone to chipping. Sometimes the die lasts for over 20,000 cycles, and other times only 10,000\u2014either the R-corner of the teeth flips up, or a large chunk breaks off; A tungsten carbide die costs 6,000 yuan, so the loss from die chipping is significant. He has also tried using DC53<\/a><\/strong>, but the dies were prone to cracking.<\/p>\n\n\n\n Since his die has teeth\u2014similar to the structure of a lock washer with many serrations\u2014and features sharp corners and fine teeth, he needs to prioritize chip resistance over wear resistance. I recommended that he use 8566 chip-resistant steel.<\/p>\n\n\n\n 8566 offers four times the crack resistance of SKH-9 high-speed steel and twice that of D2, with a hardness of 58\u201360 HRC. It is specifically designed to address the cracking issues that high-hardness die steels such as D2, DC53, SKH-9\u2014particularly in applications such as stainless steel stamping, sharp-corner stamping, narrow-flange stamping, thick-plate stamping, and cold heading dies. Cracking issues that standard die steels cannot resolve are all addressed by 8566.<\/p>\n\n\n\n When Mr. Lan first tried 8566, he remarked that its service life was 20 times that of DC53. Today, he returned to tell me that 8566\u2019s service life ranges from 6,000+ to 17,000 cycles\u2014comparable to that of tungsten carbide dies\u2014but at only one-fifth the cost. In comparison, 8566\u2019s cost-effectiveness is clearly superior.<\/p>\n\n\n\n So-called value for money isn\u2019t just about being cheap; you must first have quality and performance. Only on this foundation can we truly talk about value for money. The fact that 8566 molds have a service life comparable to tungsten carbide while reducing costs by 80%\u2014that\u2019s what we call value for money.<\/p>\n\n\n\n Mr. Lan is very pleased; he has shared this information with his friends, hoping they\u2019ll also start using 8566 anti-chipping steel, which offers excellent resistance to chipping.<\/p>\n\n\n\n To be honest, I\u2019m also very pleased that 8566 performs so well in toothed molds. It has the same service life as tungsten steel, costs only one-fifth as much, and doesn\u2019t chip\u2014the value-for-money advantage is clear.<\/p>\n\n\n\n If you also manufacture stop bolts and have previously struggled with tungsten steel molds that crack easily\u2014if you haven\u2019t been able to solve the problem and aren\u2019t sure which material to use\u2014then you should give 8566 crack-resistant steel a try.<\/p>\n\n\n\n![\"\"](\"https:\/\/www.wudejiansteel.com\/wp-content\/uploads\/2026\/08\/K\u5170\u6da4\u534e-8566\u5706\u51b7\u9566\u78b3\u94a2\u7d27\u56fa\u4ef6\uff0c\u5728\u87ba\u6813\u4e0a\u625367\u4e2a\u9f7f\uff0c8566\u5bff\u547d\u662fDC53\u768420\u500d\uff0c\u628a\u6a21\u5177\u8d39\u964d\u4f4e\u4e8680.png\")
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