Product name:Screw and barrel
Material:38CrMoAlA, SKD11, SKD61, high quality alloy steel, etc
Technology:Nitriding treatment, alloy coating sparying, heat-treatment, etc
Appliance:PE, PVC, PP, etc

Technical index:
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
Hardness of Cr-coating Layer:≥950Hv
Thickness of Cr-coated Layer:0.03-0.08mm
Hardness of Bimetallic Layer:HRC55-72
Depth of Bimetallic Layer:>2mm