Home / Standards / GB/T 1429-2025 GB/T 1429-2025 Active Proximate analysis of carbon materials 炭素材料工业分析方法 Standard Type GBT ICS 29.050 CCS Q50 Status 现行 Issue Date 2025-08-29 Implementation 2026-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A