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 with 30% glass fiber.
8503 is a proprietary non-stick mold steel from Wu Dejian Mold Steel. It offers twice the toughness of DC53 and a hardness of 55–61 HRC. Compared to DC53, it delivers double the performance at the same price, while also providing the added benefit of non-stick properties.
In particular, this non-stick property, combined with its high hardness, provides a fundamental and effective solution for molds used with high glass fiber content—molds that are prone to wear, leading to flash on products and surface roughness on the mold.
Mr. Yu from Ningbo said: “Using 8503 mold steel for glass fiber-reinforced molds is really great; it keeps molding without any flash! Now I can add that 8503 can withstand 1 million molding cycles.”
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Wu Dejian’s tool steel, the chief of staff of the user, bought everything he had used.