Category: cases

The final results showed that the impurity levels in Yuhui’s high-toughness LG mold steel were half those of the national standard and on par with imported steel. With that, my worries were finally put to rest, and I felt relieved.  Here’s what happened: Last week, I received a “complaint” from Mr. Lan stating that the surface…

  Mr. Jin said, “I was rough-blanking 3mm-thick pickled sheet metal. I bought the same piece of DC53 hard steel from Kunshan and used wire-cut dies to make the punches. The first one cracked after punching 20,000 pieces, and now this second one has cracked after only 2,000 pieces. What could be the cause?”  Indeed, when punching…

Over the past couple of days, I’ve received two inquiries regarding the punching of stainless steel over 2 mm thick, where the punches tend to chip. I’ve found that in both cases, the wrong tool steel was used. In one instance, the customer was punching 2.0 mm thick, hard 304 stainless steel; the SKH-9 punch…

We tested seven types of die steel for stainless steel cold heading punches, but all were prone to chipping. Now that we’re using Yuhui 8566 anti-chipping die steel, the service life has increased tenfold.  Mr. Xiong’s die is used for stamping 316L stainless steel, approximately 1 mm thick, primarily for thinning operations. The parts were prone…

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…

Mr. Wan said that 8503 can withstand 1 million cycles when molding nylon reinforced with 30% glass fiber.  This news really excited me.  As far as I know from my clients, 8503 mold steel—which resists material sticking—is currently the only option capable of achieving a service life of 1 million cycles when molding nylon reinforced…

Good customers are reasonable. Yuhui’s PM23 punch extended the service life by 1.5 times, which made Mr. Liang very happy. Mr. Liang was punching two 5.2mm holes and one 6.8mm hole in 3.7mm-thick stainless steel, all of which were pilot holes for tapping. The dimensional tolerances were strict. With standard PM23 punches plus coating, the…

Mold steel is a type of tool steel, which is divided into seven categories: carbon tool steel, low-alloy tool steel, high alloy tool steel (also known as cold work mold steel), high-speed tool steel, plastic mold steel, hot work mold steel, and special purpose steel. Different molds require different properties, and there are approximately 750…

Mr. Huang’s words, ‘Your family is reliable,’ have softened my heart. Mr. Huang’s blade is used to cut single and 0.15mm stainless steel wire. Originally, he used tungsten steel blades that kept breaking, but now he has switched to Yuhui PM60, which can cut for more than half a year. Last time, he bought another…

I advise everyone not to use Cr12MoV for stretching molds with coatings, as there are few successful ones. Although the price of Cr12MoV is very cheap, you will lose big for small gains. What you are losing is not only the tool steel, but also dozens of dollars per kilogram for coating costs, mold processing costs,…

A netizen asked in the 270th live broadcast room: What mold material should be used for stamping and bending 0.5mm thick stainless steel with fewer marks at the bending position? Scratches at the bending position are caused by adhesive wear of the adhesive material. When choosing mold steel, you need to choose tool steel that has…

A few days ago, a listed company visited and their aluminum die-casting molds were made of certain Shun 8407 and certain Bai 8407 mold steels. After die-casting 3000-4000 times, there were obvious cracks on the straight edges, and the products had many burrs and pits. They tried many ways, but couldn’t improve it. They asked…