From aluminum to rare earth magnetic materials! From low carbon steel to high-speed tool steel.
Asakawa Heat Treatment Co., Ltd. is a heat treatment manufacturer boasting a domestic market share of approximately 35% for engine valve seats and a global market share of about 17%. We have obtained qualifications for JIS B6913 steel hardening and tempering processing and JIS B6914 steel carburizing and carburizing nitriding hardening and tempering processing as a factory authorized for Japanese Industrial Standards. Additionally, we have acquired certification for the quality management system of organizations dealing with automotive production and related service parts under ISO/TS16949. As a certified factory for various automobile manufacturers, we strive for high quality and low cost, working to improve technology and quality while enhancing our environmental practices to meet customer demands. 【Products】 ■ Continuous oil hardening and tempering without oxidation ■ Continuous water hardening and tempering without oxidation ■ Continuous gas carburizing hardening and tempering ■ Vacuum hardening and tempering ■ Brazing in a vacuum furnace *For more details, please feel free to contact us.
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Main Heat Treatment Parts ■ Wheel Bolt ■ Wheel Nut ■ Engine Valve Cotter ■ Spring Seat ■ Door Lock Clutch ■ Auto Clutch Sleeve ■ Fastener Parts *For more details, please feel free to contact us.*
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Asakawa Heat Treatment Co., Ltd. has a comprehensive range of heat treatment equipment, including seven mesh belt type continuous furnaces, and has built a wide track record as a designated factory for various automobile manufacturers, performing over 20,000 tons of heat treatment annually. We carry out heat treatment for various components such as fastener parts, valves, cotters, and retainers. Notably, we perform carburizing, quenching, and tempering treatment on approximately 35% of domestic engine valve cotters and about 17% globally, while heat treating around 80% of domestically produced inner nuts and wheel pins for trucks. Please feel free to contact us if you have any requests.
