extruder screw and barrel for plastic injeciton molding machine 

Material:   38CrMoAlA   

                  high quality alloy steel

Technology: nitriding treatment,

                   alloy coating spraying,

                   heating treatment,

                   screw fully hardening,

specifications:

30g-25000g screw

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

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

Thickness of Cr coationg layer: 0.03-0.08mm

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