QQ-C-521D, FEDERAL SPECIFICATION: COPPER INGOT (20-MAR-1991) [S/S BY ASTM-B5, ASTM-B216, OR ASTM-B442]

QQ-C-521D, FEDERAL SPECIFICATION: COPPER INGOT (20-MAR-1991) [S/S BY ASTM-B5, ASTM-B216, OR ASTM-B442]., This specification covers copper ingots for remelting.