Material
Alloy-steel of high-quality
38CrMoAIA(JIS SACM645)
42CrMo(JIS SACM440)
9Cr18Mov
CW6Mo5Cr4V2
SKD61
Heat-treatment
Nitriding treatment
Electroplated hard-chrome finish
High-frequency quenching
Spray coating bimetallic-alloy
Vacuum quenching
Technical data
Depth of nitration layer: 0.50-0.80mm
Hardness of nitration: 900-1000HV
Fragility of nitration: less than grade 1
Roughness of the surface: Ra0.4
Linearity of the screw: 0.015mm
The surface hard chromium plating hardness after nitrogenation: above 900Hv
Chrome-plating layer thickness: 0.025-0.085
Screw barrel for injection molding machine