Extrusion Screw & Barrel 

Extrusion screw & barrel

Specification:  
Dia. 15-300 mm   Length 300-9000 mm   L/D ratio: 15-50

Grade available:

1. Standard grade: 38CrMoAlA + nitriding 96 hours
2. Bimetallic grade: 38CrMoAlA + bimetallic alloy
3. TC-A grade: Tungsten Carbide 40%
4. TC-B grade: Tungsten carbide 25%
5. TC-C grade: Tungsten carbide 9.5%

Techinical information :
Depth of Nitrated Layer: 0.5-0.8mm
Heat treatment: Nitriding 96 hours
Fragility of nitration: Less than grade 2
Hardness of nitration:HV900-1060 (HRc56°-65°)
Roughness of the surface:Ra 0.4μm
Screw straightness: 0.015mm/m
Chrome plating thickness: 0.01-0.1mm
Alloy Hardness:HRC58-62
Alloy Depth:>2mm
Common Nitrided:1-2years;Bimetallic: much longer lifetime.