ZY is a very experienced and professional ISO certificated manufacturer for screws and barrels, we have exported our products to 23 different countries with good quality products and serviced. 
Pls find the detailed info. For injection screw and barrel as below: 
Specification: 
Screw diameter: Φ 20mm-Φ 220mm 
Mould clamping force: 250T-3200T 
Shot weight: 30G-30000G 
Technical Information 
Base Materials: 
1)38CrMoAlA(JIS SACM645) 
2)42CrMo(AISI 4140) 
Bimetallic alloy materials: 
1)Fe-based alloy 
2)Ni-based alloy/Deloro alloy 
3)Tungsten carbide/Wolfram carbide 
Technics: 
Heat treatment 
High-frequency quenching 
Nitriding treatment 
Hard-chrome electroplating 
Bimetallic alloy welding 
Bimetallic alloy centrifugal casting 
Technical parameter: 
Nitrided layer depth: 0.5-0.8mm 
Nitrided hardness: 900-1000HV 
Nitrided brittleness: Less than grade 1 
Surface roughness: Ra0.4 
Linearity of screw: 0.015mm 
Hard-chrome plating hardness after nitr…