Over 29 years experience in Screw Barrel Line . More info pls feel free to find kaylee(at)tizatech.com .
High Speed Screw
 High Quality Alloy Steel
 1) 38CrMoAIA(JIS SACM645)
 2) 9Cr18MoV
 3) 4Cr5MoSiVI(JIS SKD-61)
 4) 42CrMo(AISI 4140)
 Nitriding Treatment
 Vacuum Quenching
 High-Frequency Quenching
 Electroplated Hard-Chrome Finish
 Spray Coating Bimetallic Alloy
Best regards .