Fuji Die Co.,Ltd. developed a tungsten-free alloy and aims to ensure stable supply by reducing the use of rare metals. With hardness equivalent to general-purpose cemented carbide and a specific gravity of approximately half, it plans to begin trial sales and target a full-scale launch in the latter half of 20.
Fuji Die Co.,Ltd. developed an alloy that does not use tungsten. By reducing the amount of rare metals used, it is expected to be less affected by geopolitical risk and enable stable supply. While maintaining hardness comparable to general-purpose cemented carbide, it weighs approximately half as much, which is expected to reduce the burden on workers and equipment. Trial sales will begin shortly, with a full-scale launch targeted for April 2027. Pricing is available by individual quotation.
The new alloy has an HRA89 hardness, equivalent to that of general-purpose cemented carbide, and a specific gravity of approximately 8.1, making it lightweight. It is reportedly less prone to chipping than STN30, launched in 2025, while improving transverse rupture strength and fracture toughness.
Its corrosion resistance has been improved, and it is explained that virtually no corrosion is observed even under conditions involving 10% sodium hydroxide and 3% sodium chloride. Electrical-discharge machining is expected to be comparable to that of conventional cemented carbide, while PVD coating is expected to improve wear resistance and reduce friction. The company is pursuing alloy development that is less susceptible to geopolitical risk and announced a business alliance with ダイジェット工業 in 26 aimed at reducing rare-metal use.