Home / Standards / GB/T 21931.2-2025 GB/T 21931.2-2025 Active Ferronickels—Determination of sulfur content—Infrared absorption method after induction furnace combustion 镍铁 硫含量的测定 感应炉燃烧红外线吸收法 Standard Type GBT ICS 77.100 CCS H11 Status 现行 Issue Date 2025-06-30 Implementation 2026-01-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A