QQ-M-56B (NOTICE 1), FEDERAL SPECIFICATION: MAGNESIUM ALLOY, SAND CASTINGS (01 MAR 1990) [S/S BY ASTM-B80]

QQ-M-56B (NOTICE 1), FEDERAL SPECIFICATION: MAGNESIUM ALLOY, SAND CASTINGS (01 MAR 1990) [S/S BY ASTM-B80]., Federal Specification QQ-M-56B, dated October 24, 1960, including QQ-M-56B, Amendment 1, dated December 19, 1963, has been superseded by ASTM B 80, Magnesium-Alloy Sand Castings, dated April 1987.