Material:38CrMoALA,SKD61,SKD11,D2
Diameter:D12-D300 mm
L/D Ratio:L/ D=10-50
Surface Roughness:Ra0.4μm
Screw Straightness:0.015mm
Nitriding Layer Depth:0.4-0.8mm
Nitriding Fragility:Less Than Grade Two
Nitriding Layer Hardness:950-1020HV
Cr-Plating Layer Depth:0.03-0.10mm
Cr-Plating Layer Hardness:850 HV
Cr-Plated Surface Hardness after Nitriding:≥900HB
Hardness after hot-treatment:HB240-280
Nitriding Treatment Time:≥96 hours
Bimetallic Layer Hardness:58-65 HRC
Bimetallic Layer Depth:0.8-2.0mm