Japanese Nitto Seiko Develops

The Japanese automotive industry is accelerating towards CO2 reduction and the development of seld-driving cars. Currently the top priority is lightweighting of the car body, and Japanese screw makers are also seeking lightweighting of bolts. In light of this, Nitto Seiko developed "Tough Alum." high strength aluminum bolts that has the same tensile strength (over 420MPa) as steel bolts.

 

"Tough Alum." uses 6000 series aluminum that is high-strength and less prone to stress corrosion crack, and after heat treatment it can attain the same level of tensile strength as steel bolts.  Therefore, the weight can decrease to two thirds of a steel bolt to support customers' demand for product lightweighting. Furthermore, the oxide film on the aluminum surface can achieve excellent cossosion resistance, and prevent galvanic corrosion in conjunction with aluminum parts. Applying Nitto Seiko's original "Flix" coefficienct of friction stabilizer onto "Tough Alum." will alleviate seizing that is unique to aluminum products, achieving axial force fastening merely by low torque. "Tough Alum." has launched sales since November with a target of producing 1 million pieces per month.

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