Product Specification and technical data
Inner Diameter: Ø 20-Ø 300
Effective length: 12000mm
Hardness of quenching and tempering: HB240° ~280°
Hardness of nitration: HV850° ~1000°
Depth of Nitrated Layer: 0.45~0.7mm
Fragility of nitration: ≤ Grade 2
Surface roughness: Ra0.4
Straightness: 0.015mm

Hardness of Cr-coating Layer: HV≥ 900HV
Nitrided layer thickness: 0.05~0.10mm
Thickness of Cr-coated Layer: 0.8~2.0mm:
Hardness of bimetallic alloy: HRC56° ~65° (Ni-based alloy)
Material: Quality alloy steels
Heat-treatment: Nitriding treatment
Electroplated hard-chrome finish
High-frequency quenching
Spray coating Bimetallic-alloy
Vacuum quenching