Extruder screw barrel

Depth of nitrated Layer: 0.5-0.8mm
Hardness of nitration: 900-1020Hv
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

Specifications of screw:

Φ20-φ250 L/D 15-50 We offer various types of extruder screws and adjust to different compression ratio, which can fulfill customer's requirement perfectly.