Product Specification and technical data

• Diameter：Φ35/77～Φ92/188
• Quenching and tempering hardness: HB240-280°
• Nitration hardness: HV900-1,050°
• Depth of Nitrated Layer: 0.5-0.8mm
• Thickness of Cr-coated Layer: 0.03-0.08mm
• Nitration fragility: ≤grade 1
• Surface roughness: Ra 0.4um 
• Straightness: 0.015mm
• Cr-coating layer hardness: HV≥950HV
• Depth of Bimetallic Layer: 3-5mm
• Bimetallic hardness: HRC52-64°

Material :quality alloy steels

• ① 41CrAlMo7
• ② EN41-B
• ③ AISI4140
• ④ 1.85
• ⑤ SKD61，SKD11
• ⑥ 38CrMoAlA
• ⑦ W6Mo5Cr4V2

Heat-treatment:

• Nitriding treatment
• Electroplated hard-chrome finish  
• Vacuum，High-frequency quenching
• Baking，Spray welding Bimetallic-alloy