1.38 CrMoALA Material 2.Nitriding Depth:0.6~0.8mm 3.High Quliaty Base Material 4.bimetallic extrusion screw barrel

bimetallic screw and barrel for extruder screw extruder screw and barrel for plastic extrusion machinery

size: screw diameter:Φ20-Φ500mm

Maximum screw length:10000mm

Barrel inner bore diameter:Φ500mm

Material: 38CrMoAlA

40CrMo

42CrMo

high quality alloy steel

Technology: nitriding treatment,

alloy coating spraying,

heating treatment,

screw fully hardening,

Depth of nitrition layer: 0.5-0.8mm

Nitriding treatment, surface hardness: HV≥900-1000

Fragility of nitrition: less than grade 1

Surface roughness: Ra 0.4um

Streightness of screw: 0.015mm

Surface of hardness of nitrated Cr coating layer: ≥950HV

Hardness of Cr coating layer: HRC55-62

Thickness of alloy plating: 0.03-0.08mm

Depth of alloy layer:2mm

Used for granulation,PP, PE, PA, PC, ABS,AS etc

We can manufacture various kinds of screw barrels according to the customers requirement

bimetallic extrusion screw barrel