Home / Standards / GB/T 4702.2-2025 GB/T 4702.2-2025 Active Chromium metal—Determination of silicon content—Perchloric acid gravimetric method and molybdenum blue spectrophotometric method 金属铬 硅含量的测定 高氯酸脱水重量法和钼蓝分光光度法 Standard Type GBT ICS 77.100 CCS H 11 Status 现行 Issue Date 2025-10-31 Implementation 2026-05-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A