Today I took the blame again—twice, in fact. Both complaints were related to the 8566, but it wasn’t my 8566 that was being complained about; a punch manufacturer had counterfeited my 8566, and the customers filed complaints against me.
Both of these customers had used my 8566 as a punch and were very satisfied with it, but I don’t manufacture punches myself. To save trouble, they went to an outside supplier for 8566 punches. They both found that punch factory in Shenzhen that heavily advertises 8566 punches. Before placing their orders, they specifically asked, “Is this 8566 the same as the Yuhui 8566 from Wu Dejian in Dongguan?” The factory replied, “Yes, it’s Yuhui’s 8566.” But when they received the punches, the ones that were supposed to break did break, and the ones that were supposed to chip did chip, so they filed complaints with me.
The first customer used wire-cut punches made from sheet metal—the 8566 he bought from Wu Dejian worked fine. He wondered why the 8566 punching needles, made from the same material, were causing problems, so he confronted the factory, intending to have the 8566 needles coated. The factory told him that 8566 cannot be coated, which made him furious, so he came to ask me about it—that’s how I found out about this issue.
The second customer is also one of mine. He bought my 8566 and used it to punch 4mm-thick stainless steel with excellent results. However, finding it too much trouble to source the punches himself, he approached this punch manufacturer to have 8566 punches made. Before placing the order, the manufacturer confirmed with him, “Did you get the 8566 from Yuhui?” He swore up and down that it was Yuhui’s 8566. But after using them, the punches kept breaking.
Two customers came to me with complaints within a single day. I felt wronged and frustrated, so I’m recording this video to set the record straight: the 8566 supplied by that punch manufacturer in Shenzhen is not the 8566 supplied by Yuhui.
I just can’t wrap my head around it. When customers come knocking on your door, if you run your business well, conduct yourself with integrity, and do your work diligently, wouldn’t that customer naturally become a long-term client? Why would you resort to cheating and deceiving customers for such a small amount of business? Aren’t you just driving them away?
If you’re going to drive customers away, you might as well not take on this business at all. It won’t make you rich, and it’ll only cause trouble—what’s the point?
8566 is a proprietary anti-spalling steel developed by Yuhui, primarily designed to solve the problem of mold spalling. However, 8566 is not a nationally standardized grade; it is not in the public domain—it is our intellectual property. Currently, due to its high market visibility, 8566 is specifically requested by users and enjoys strong sales—which has attracted widespread copying by competitors across the internet. Not only are there direct copies of 8566, but also “shadow” versions of 8566, and many people have been deceived as a result.
8566 is a chipping-resistant steel designed primarily to solve mold chipping problems. It has accumulated over a thousand case studies across 5 stamping operating conditions, 6 major material types, and 7 major application areas. The chipping resistance of 8566 is 4 times that of SKH-9 high-speed steel and 2 times that of D2. It has a hardness of 58–60 HRC. It primarily addresses chipping issues that high-hardness die steels such as D2, DC53, and SKH-9 cannot resolve—particularly in applications like stainless steel stamping, sharp-corner stamping, narrow-flange stamping, and thick-sheet stamping, where standard die steels fail to prevent chipping. These challenges are all successfully resolved with 8566.
If a punch manufacturer tells you that the 8566 they use comes from Yuhui, you should ask them to provide the most recent delivery slip. We issue a delivery slip for every order, and our prices are standardized. If they cannot produce one, they are definitely trying to deceive you. Even if they show you a material certificate from several years ago, that’s still a scam—we no longer issue material certificates; we only provide delivery slips.
Let me remind you again: I have no affiliation with any stamping factory. If you want to verify whether they’re using 8566 die steel from me, ask them to provide a delivery slip. If they can’t produce one, they’re definitely trying to pull the wool over your eyes.
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Wu Dejian’s tool steel, the chief of staff of the user, bought everything he had used.