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H.C. Starck’s Advancements in Alloy Development
With the innovation of new alloys, H.C. Starck has surpassed market demands for higher performance products, especially in the plastic injection molding industry. H.C. Starck’s TZM alloy, composed of titanium (0.50 wt. %), zirconium (0.08 wt. %) and the balance in molybdenum, has mechanical and thermal properties that exceed pure molybdenum. The small alloying additions of titanium and zirconium form carbides that significantly increase the toughness, hardness and wear resistance of pure molybdenum while maintaining good thermal properties of high thermal conductivity and low thermal expansion. TZM alloy has high strength and elastic modulus at elevated temperatures along with good abrasion and corrosion resistance that make it useful for hot runner nozzle applications.
In some plastic injection molding applications, tungsten high density alloys are the preferred material. H.C. Starck’s tungsten high density alloys consist of molybdenum (4 wt. %), nickel (4 wt. %), iron (2 wt. %) and the balance in tungsten. Tungsten alloys exhibits high strength and elastic modulus at high temperatures along with high thermal conductivity and low thermal expansion along with the benefit of being easy to machine.