Cincinnati extruder screw and barre/CM65 PVC twin conical screw and barrel

Hardness After Hardening&Tempering

HB280-320

Nitride Haedness

HV850-1000

Nitride Brittleness

>=Grade Two

Surface Roughtness

Ra 0.4

Screw Straightness

0.015mm

Alloy hardness

HRC50-65

Alloy depth

0.8-2.0mm

Surface Chromium-Plating’s Hardness

After Nitriding

>= 900HV

Chromium-Plating Depth

0.025-0.10mm