Depth of Nitration Layer: 0.5-0.8mm
Hardness of Nitration: 950-1020Hv
Fragility of Nitration: Less than grade 1
Surface Roughness: Ra 0.4 um
Streightness of Screw: 0.015mm
Surface Hardness of Nitrated Cr coating Layer: >=950Hv
The Thickness of Cr Coating Layer: HRC55-62
Hardness of Alloy Plating: 0.03-0.08mm
Depth of Alloys Layer: >2mm

Introduction: Used for add color additives, better looking and plasticity.

We can all types of screws and barrels according to clients' requirement.