Home / Standards / GB/T 31303-2014 GB/T 31303-2014 Active Austenitic-Ferritic duplex stainless steel bars 奥氏体-铁素体型双相不锈钢棒 Standard Type GBT ICS 77.140.20 CCS H44 Status 现行 Issue Date 2014-12-05 Implementation 2015-09-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A