Category: blog

Problem Description: PA66+GF30 injection molding cores keep breaking; the mold manufacturer replaced 8 sets of cores for free but still couldn’t fix the problem. A user asked: What type of mold steel should be used for mold cores to prevent breakage? His operating conditions are: — Injection molding of PA66 reinforced with 30% glass fiber;…

Case Study: After a Six-Month Trial Period, the Customer Placed a Bulk Order for 23 Pieces of 8503 Mold Steel This morning’s most significant order: Mr. Zhang, who injection molds PA66+GF30, placed a single order for 23 pieces of 8503 mold steel in four different specifications, moving from a trial period to bulk purchasing. Mr. Zhang…

Problem Description: For 316L stainless steel liquid-cooled plate hot forging dies, H13 has a short service life and suffers from rapid die collapse. What die steel should be used? Frequently Asked Questions: What die steel should be used for liquid-cooled plate hot forging dies? The liquid-cooled plates are made of 316L stainless steel, and the hot forging…

The most significant order this morning came from Mr. Zhang, who works with PA66+GF30 injection molding. He has started purchasing 8503 mold steel—which resists sticking—in bulk, placing an order for 23 pieces today. Mr. Zhang added me as a friend on September 9, 2020, and contacted me again on March 6 of this year: “Boss,…

The market is very competitive right now, but I’ve noticed that everyone is competing to improve quality and performance, rather than competing on low prices. This morning, I received an inquiry regarding a high-strength shaft used for tightening bolts. The current material is 45CrMo1Ni, but the shaft breaks under extreme loads, so they’re looking for…

Twenty days later, we received good news about 8566. Mr. Zhang said that using 8566 for punches has doubled their service life, and the results are satisfactory. On April 18, 2026, Mr. Zhang asked: “Hello, are there any good materials for making punches that are wear-resistant and won’t break?” After further discussion, we learned that…

Getting a target customer to place an order isn’t easy. Today, a customer who added me on WeChat back on January 30, 2021, finally placed an order—it took a year and eight months. Although it took a while, the outcome was great. Many of my clients come to me this way: they might add me…

Mr. Lu asked: A die for cold heading with a small intermediate step and a sleeve cracked after being used for over 10,000 cycles. The material of the part is 10B21. We’ve tried tungsten steel and white steel—are there any die steels with better toughness?  Cold heading die plates are the parts that are struck,…

Mr. Yang came by again today to purchase 8566 anti-chipping steel. While this may seem like a routine task over the past two-plus years, it was actually hard-won. I recall Mr. Yang once mentioning that when precision-stamping gears from 5mm-thick S420MC pickled sheet, he initially used DC53 steel with a hardness of 60–62. However, the teeth…

I. Introduction to the Issue: Why Does It Take 3–4 Hours to Saw a Large Die Steel Plate? We have just completed a major project: sawing a thick die steel plate measuring 700 mm wide by 430 mm high, with each cut taking 3–4 hours. Why go to such great lengths to cut it? There is only…

I. Problem Description: When punching a 4.0mm hole in a 9mm iron bar, an SKH51 punch breaks after just over 100 punches. What material should be used? Question from a live stream viewer: When punching 4.0mm holes in a 9mm-diameter iron bar (round bar), I’m currently using SKH51 high-speed steel punches, but they don’t last long—the…

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…