Specification parameters: Screw diameter:Φ15-Φ300 Draw ratio::15-53 Base material:: 1)38CrMoAlA(JIS SACM645) Material composition analysis: C: 0.35~0.42 Si: 0.20~0.45 Mn: 0.30~0.60 S: ≤0.035 P: ≤0.035 Cr:1.35~1.65 Al: 0.70~1.10 Ni: ≤0.030 Cu: ≤0.030 ...
High Quality Alloy Steel 1) 38CrMoAIA(JIS SACM645) 2) 42CrMo(AISI 4140) Nitriding Treatment Vacuum Quenching High-Frequency Quenching Electroplated Hard-Chrome Finish Spray Coating Bimetallic Alloy Ningbo Tianze Machinery Technology Company , over 29 years in Screw and Barrel ...