Material
1 38CrMoAIA(JIS SACM645)
2 9Cr18MoV
3 42CrMoV(AISI 4140)
4 41CrA1Mo7
Heat treatment
· Nitriding treatment
· Electroplated hard chromium coating
· Spray coating anticorrosion
· Wear resistant bimetallic coating
Screw Diameter: Φ15mm-Φ350mm
Depth of Nitrated Layer: 0.5-0.8mm
Hardness of nitration: 900-1020Hv
Fragility of nitration: Less than grade 1
Surface Hardness of Nitrated Cr coating layer: ≥950Hv
Hardness of Bimetallic Layer:HRC55°-72°
Thickness of Cr-coating Layer: 0.03-0.08mm
Depth of Bimetallic Layer: >2mm