Product

38CrMoAIA screw and barrel for extruder machine

Material

38 CrMoAlA(JIS SACM645); 42CrMo(JIS SCM440)

Hardness of nitrogen treatment

HV900°~1100°

Tempering hardeness

HV240 ° ~280°

Depth of nitrogen layer:

0.6~0.8mm

Nitrided Brittleness

above 1 stage

Surface Roughness

Ra0.4 um

Screw straightness

0.015mm

Hardess of surface chromium-plating after Nitriding

HV≥950HV

Chromium plating Depth

0.025-0.085mm

Alloy Depth

2.5mm-4mm

Alloy hardness

HRC62°~72°

Heating-treatment

nitrogen ,electroplated hard -chrome finish,high frequency quenching