What is a nitride barrel, the main material composition is

Nitriding barrel is the most common barrel, the material composition: SACM645 alloy steel; 38CrMoAla alloy structural steel, Jinyang nitride barrel by quenching, molding, ion nitriding, stereotypes, soft nitriding (secondary nitriding) . The barrel bore surface hardness and wear resistance, Jinyang screw - nitrogen barrel for processing ordinary plastic, PP, ABS, PS, PE, EVA, PVC, PO, PU and other general plastic