This screw do counts, Profile, rectangular wire, tubing, and granulation.
Screw compression ratio can be based on different products and different formulas for design.
Product Description: Top quality alloy steel 1)38 CrMoA1A(JIS SACM645)2) 9 Cr18MoV
Surface treament: Tungsten Carbide
Paint anti wearing and corrosion double metal layer
Technical Parameter: Deepness of Nitriding Layer 0.50-0.80mm
Hardness of Nitriding: 900-1000HV
Nitriding Brittleness: ≤First Class
Surface Roughness: Ra0.4
Screw Alignment: 0.015mm
Hardness of Chrome Plating Coating after Nitrding ≥ 950Hv
Thickness of Chrome Plating Coating: 0.025-0.085mm |
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