For PE
Material:38CrMoALA  40Cr 

Technology:PAT spraying ,Thermal spraying ,Screw fully hardening

Hardness:55HRC-72HRC

Alloy thickness: 2.5cm-4cm
Nitrition Layer Depth:0.5-0.8mm
Nitrition Fragility:Less than Grade Two
Various types of feed screws and barrels for rubber machine