Specifications: S780/SS2.5 S660/SS2.0 S550/SS1.7 S460/SS1.4 S390/SS1.2 S330/SS1.0 S280/SS0.8 S230/SS0.6 S170/SS0.5 S110/SS0.3 S70/SS0.2

Chemical Composition: C 0.70%~1.20% Mn 0.35%~1.20% Si ≥ 0.40% S ≤ 0.05% P ≤ 0.05%

Hardness: conventional 40~50HRC specific 42~56HRC specific 56~60HRC

Hardness Deviation: Max Deviation ± 3.0HRC

Durability: 2000~2800 Times

Microstructure: Tempered Martensite or Sorbite

Density: 7.4g/cm³

Bulk Density: 4.4g/cm³