Depth of nitrated Layer: 0.5-0.8mm Hardness of nitration: 950-1020Hv Fragility of nitration: Less than grade 1 Surface roughness: Ra 0.4um 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-4mm Specifications of screw: Φ 20-φ 250 L/D 15-50 We offer various types of extruder screws and adjust to different compression ratio, which can fulfill customer's requirement perfectly.
