So far this morning, the most valuable order has come from an injection molding factory that’s back to purchase high-toughness LG mold steel.
Although he’s a frequent repeat customer, I still get a little excited every time I see an order from him.
I’m impressed by how often he places orders, the large order amounts, and how smoothly and promptly he pays—without any fuss. Anyone would be happy to have a client like this.
But you know what? This client’s molds really do require high-toughness LG mold steel. His operating conditions are quite harsh. He’d already tried three or four different types of mold steel before—either they cracked or wore out—and nothing seemed to work right. It wasn’t until he came to me and started using LG mold steel that his molds started running smoothly.
He’s injection molding PPS+65% GF, PPS, PBT, and PA—all high-temperature materials rated for 120°C. With high glass fiber content, they’re prone to wear and tear, and the parts are relatively thin. Currently, the inserts are prone to breaking and wear. 440C, Fushun S136, and S139 all cracked, and he’s tried both imported and domestic S136.
Given the high glass fiber content in his molds, which require high wear resistance, combined with the thin-walled inserts and the current breakage issues, the mold steel must prioritize toughness. Considering the mold’s need for both high hardness and high toughness, as well as past successful case studies, I recommended that he use high-toughness LG mold steel.
Since LG is a proprietary high-toughness mold steel developed by Yuhui Company, its toughness is 8 to 9 times that of DC53, with a hardness of HRC 54–58. It is so tough that it won’t break even if you bend it.
Just as Mr. Yu said, LG mold steel combines hardness with toughness. Even 60-meter-long heat-treated hard steel scraps left over from wire cutting won’t break when bent 180 degrees; they even spring back after the force is released. LG offers both toughness and rigidity, and it’s been snapped up by a group of friends in the plastic mold industry—it works exceptionally well for wire-cutting slender cores.
Now that customers are placing large, high-frequency orders, it’s clear that LG mold steel has solved their problems with mold wear and breakage. Using LG mold steel to prevent mold cracking is like stepping into a liberated zone—seeing these big orders from good customers makes me very happy.
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Wu Dejian’s tool steel, the chief of staff of the user, bought everything he had used.