{"id":820,"date":"2026-06-05T09:20:51","date_gmt":"2026-06-05T09:20:51","guid":{"rendered":"https:\/\/www.wudejiansteel.com\/?p=820"},"modified":"2026-06-05T09:20:52","modified_gmt":"2026-06-05T09:20:52","slug":"we-tested-seven-types-of-die-steel-for-stainless-steel-cold-heading-punches-but-all-of-them-chipped-yuhui-8566-die-steel-increased-the-punch-life-by-10-times-blog-153","status":"publish","type":"post","link":"https:\/\/www.wudejiansteel.com\/?p=820","title":{"rendered":"We tested seven types of die steel\u00a0for stainless steel cold heading punches, but all of them chipped. Yuhui 8566 die steel\u00a0increased the punch life by 10 times.blog\u00a0153"},"content":{"rendered":"\n

We tested seven types of die steel<\/a><\/strong>\u00a0for stainless steel cold heading punches, but all were prone to chipping. Now that we\u2019re using Yuhui 8566 anti-chipping die stee<\/strong>l, the service life has increased tenfold.<\/p>\n\n\n\n

 Mr. Xiong\u2019s die is used for stamping 316L stainless steel, approximately 1 mm thick, primarily for thinning operations. The parts were prone to chipping. We\u2019ve tried ASP60, ASP23, SKH-9, SKH51\u2014but even the best of these failed after just 3,000 strokes. We also tested LD, DC53, and SKD11.<\/p>\n\n\n\n

 Mr. Xiong contacted me in April. Given that his narrow-edge punches were constantly chipping\u2014and considering he was working with the hard 316L stainless steel\u2014I recommended switching to 8566 anti-chipping steel for his punches.<\/p>\n\n\n\n

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8566 die steel<\/a><\/strong>\u00a0offers four times the crack resistance of SKH-9 high-speed steel<\/a><\/strong>\u00a0and twice that of D2, with a hardness of 58\u201360 HRC. It effectively addresses cracking issues that high-hardness die steels such as D2, DC53, and SKH-9 cannot resolve; This is particularly true in harsh conditions such as stainless steel stamping, sharp-corner stamping, narrow-flange stamping with minimal overlap, and even situations where the punch diameter is smaller than the sheet thickness or the stamping ratio is less than 1:1. Chipping issues that standard die steels cannot resolve are all addressed using 8566 anti-chipping steel. Solving punch chipping is 8566\u2019s specialty.<\/p>\n\n\n\n

 When Mr. Xiong came back today to purchase more 8566 die steel<\/strong>, I asked him, \u201cJust to check in with you\u2014has the punch chipping issue improved since your last purchase of 8566 die steel<\/strong>? How many products can you punch with the current batch of 8566?\u201d<\/p>\n\n\n\n

 Mr. Xiong replied, \u201cWe\u2019ve stamped over 30,000 parts and had only one failure\u2014it\u2019s much better than before.\u201d<\/p>\n\n\n\n

 It seems the results are indeed much better. Compared to the seven types of die steel<\/strong> we tested previously, the best we achieved was 3,000 stampings. Now we can stamp 30,000 times, which means the service life has increased tenfold.<\/p>\n\n\n\n

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 This 10-fold increase in service life offers three major benefits.<\/p>\n\n\n\n

 Benefit 1: With a 10-fold increase in service life, there\u2019s no need to machine as many punches. This not only saves a significant amount on machining costs but also reduces the workload for mold technicians, freeing up their time for other tasks. The savings from reduced punch machining costs alone are enough to purchase many 8566 punches, effectively making the 8566 punches free to use.<\/p>\n\n\n\n

 Benefit 2: A 10-fold increase in service life means 10 fewer punch replacements and 10 fewer machine downtime events. The time saved translates directly into improved efficiency.<\/p>\n\n\n\n

 Benefit 3: While the service life of the punches has increased tenfold, the price of 8566 has not risen tenfold\u2014in fact, it is even cheaper than the original material. With a 10-fold increase in service life and a decrease in costs rather than an increase, this cost-performance ratio is unmatched by other die steels. This also demonstrates once again that as long as the mold steel performs well, even the most expensive option is actually cost-effective.<\/p>\n\n\n\n

 When cold heading 1.0mm-thick 316L stainless steel to reduce thickness, seven different mold steels were tested. All the punches were prone to chipping, with the longest-lasting one lasting only 3,000 strokes. Now, using 8566 <\/strong>die<\/strong>l steel<\/strong>, we can produce 30,000 parts\u2014a tenfold increase in service life. Yet the cost of the tool steel hasn\u2019t risen; in fact, it\u2019s even cheaper. It also offers three additional benefits. To say that using 8566 <\/strong>die <\/strong>steel<\/strong> for punch chipping is like moving from the old to the new world is no exaggeration.<\/p>\n\n\n\n

 Once again, 8566 die steel<\/strong> has helped our customers achieve low-cost, high-efficiency, and long-lasting performance. I\u2019m in a great mood.<\/p>\n\n\n\n

 If your stainless steel punches are cracking, you should definitely try 8566 crack-resistant steel. The material cost for a small punch is low, but machining costs are high, and the cost of lost time is significant. With a 10-fold increase in service life, you won\u2019t just save money\u2014you\u2019ll actually make money.<\/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 tested seven types of die steel\u00a0for stainless steel cold heading punches, but all were prone to chipping. Now that we\u2019re using Yuhui 8566 anti-chipping die steel, the service life has increased tenfold.  Mr. Xiong\u2019s die is used for stamping 316L stainless steel, approximately 1 mm thick, primarily for thinning operations. The parts were prone […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-820","post","type-post","status-publish","format-standard","hentry","category-cases"],"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