MIL-S-81591, MILITARY SPECIFICATION: STEEL, INVESTMENT CASTINGS, CARBON AND CORROSION RESISTING (09 SEP 1968) [S/S BY VARIOUS NON-GOVERNMENT STANDARDS - REFER TO NOTICE 1]

MIL-S-81591, MILITARY SPECIFICATION: STEEL, INVESTMENT CASTINGS, CARBON AND CORROSION RESISTING (09 SEP 1968) [S/S BY VARIOUS NON-GOVERNMENT STANDARDS - REFER TO NOTICE 1]., This specification prescribes the requirements for carbon steel castings and corrosion-resistant steel castings made by the investment casting process.