Material:Quality 38 CrMoALA
Hardness After Hardness:HB240～280
Nitrided Hardness:HV850～1000
Nitrided Case Depth:0.45～0.7mm
Nitrided Brittleness:≤ First grade
Surface Roughness:Ra0.4
Screw Straightness:0.015mm
Surface Chromium-Plating's Hardness After Nitriding:≥900HB
Chromium-Plating Depth:0.05～0.10mm
Alloy Hardness:HRC56～65
Alloy Depth :0.8～2.0mm