Home / Standards / GB/T 38812.4-2022 GB/T 38812.4-2022 Active Direct reduced iron—Determination of metallic iron—Bromine-methanol titrimetric method 直接还原铁 金属铁含量的测定 溴-甲醇滴定法 Standard Type GBT ICS 73.060.10 CCS D31 Status 现行 Issue Date 2022-12-30 Implementation 2023-04-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A