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See Chinese contents: GB/T 223.58-1987 GB/T 223.58-1987: Methods for chemical analysis of iron, steel and alloy - The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content
This standard applies to the determination of the amount of manganese in pig iron, carbon steel, alloy steel, and iron powder. Measuring range is 0. 10% ~ 2. 50%. This standard follows the requirements GB 1467-78 Method for chemical analysis of metallurgy product - General rules and regulations.
