QQ-M-56B, FEDERAL SPECIFICATION: MAGNESIUM ALLOY, SAND CASTINGS (24 OCT 1960) [S/S BY ASTM-B80]

QQ-M-56B, FEDERAL SPECIFICATION: MAGNESIUM ALLOY, SAND CASTINGS (24 OCT 1960) [S/S BY ASTM-B80]., This specification presents the requirements for magnesium alloy casting.