Home / Standards / GB/T 34889-2017 GB/T 34889-2017 Active Carburizing or carbonitriding,quenching and tempering of steel parts 钢件的渗碳与碳氮共渗淬火回火 Standard Type GBT ICS 25.200 CCS J36 Status 现行 Issue Date 2017-11-01 Implementation 2018-05-01 Responsible Dept 国家标准委 Drafting Unit N/A