Mr. Liu said that using your 8566 die steel to punch HV400 304 stainless steel works very well too!
After receiving this positive feedback, I immediately asked, “How thick is your 400 HV 304 stainless steel, and how many cycles can the 8566 handle?”
The reply was that it was 0.4 mm thick 400 HV 304 stainless steel. The product was quite complex, with narrow edges, but after 150,000 stamping cycles with the 8566, it still looked great—no burrs or defects.
When stamping 400HV hard stainless steel, the 8566 tool withstood 150,000 stamping cycles without wear. The finished product showed no burrs and looked great. This level of wear resistance amazed me and further proves the excellent durability of the 8566.
What surprised me even more is that the product features narrow edges and is made of 0.4mm-thick hard stainless steel. Case studies indicate that such harsh conditions typically lead to corner chipping, yet the 8566 did not chip, demonstrating its excellent resistance to chipping.
Taken together—the narrow flange and the hard material—this is a harsh operating condition where chipping is common. Yet, after 150,000 stamping cycles, the 8566 remains in pristine condition, showing neither chipping nor wear. With so many unexpected benefits, it’s understandable that the customer is delighted.
This once again proves that when it comes to preventing punch chipping, using 8566 die steel makes all the difference—it’s like night and day!
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Wu Dejian’s tool steel, the chief of staff of the user, bought everything he had used.