JIS SCM440 High-strength Steel Material
BONOSS Forged Grade 12.9 Wheel Bolts applied JIS SCM440 steel material. The SCM440 is a medium carbon chromium molybdenum alloy steel. The Chromium provides good hardness permeability and Molybdenum gives hardness uniformity and high strength. It also has good ductility and high-temperature stress resistance, structural stability, low harmful elements, a small decarburization layer, few surface defects, and more advantages. Wheel Bolts made of Forged SCM440 alloy steel features many desirable properties such as high strength, wear-resistance, excellent toughness, impact resistance, and high-temperature resistance.