parallel twin screw and barrel 1.all kinds of twin parralel screws and barrels 2.Nitriding treatment; 3.Heat-treatment;

parallel twin screw and barrel Size:screw diameter 20-500mm Maximum screw length :10000mm Material:38CrMoAla

parallel twin screw and barrel 

Technical parameter:

Material	38CrMoAIA,42CrMo,9Cr18MoV
Nitride depth	0.7mm
Surface hardness	HV950 - HV1,020
Fragility of nitrition	less than grade 1
Screw straight tolerance	0.015 mm/m
Surface roughness	Ra 0.4μm
Linearity of the screw	0.015mm
Depth of double alloys	> 2ram
Bimetallic layer depth	3mm

Specifications:

Product name: Twin parallel screws and barrels

Screw Diameter: Φ35mm-Φ200mm

Material: 38CrMoAlA;   SKD61;  SKD11;  40Cr;  42CrMo;  high quality alloy steel

Technology:  nitriding treatment, alloy coating spraying, heat-treatment

Appliance: PP, PE, PA, PC, ABS, AS etc

High quality twin parallel screw and barrel