... ,40 Cr , etc 2.Technology:Heat-treatment applied,Nitriding treatment,Vacuum harde Quick Details Place of Origin: JIangsu China (Mainland)Brand ... ,42CrMo,40 Cr , etc2.Technology:Heat-treatment applied,Nitriding treatment,Vacuum hardening,High-frquency qunching3.Application:PA,PE,PVC(UPVC), PET,etc4 ...