Parallel twin screw & barrel
Product Description
Product Specification and technical data
- Diameter：Φ35mm～Φ220mm
- Ratio of length to diameter：L/D = 16-36
- 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°
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