MIL-S-21952D, MILITARY SPECIFICATION: STEEL (HY-80 AND HY-100) BARS, ALLOY (10-JAN-1990) [SEE NOTICE 1 FOR REPLACEMENT INFORMATION]

MIL-S-21952D, MILITARY SPECIFICATION: STEEL (HY-80 AND HY-100) BARS, ALLOY (10-JAN-1990) [SEE NOTICE 1 FOR REPLACEMENT INFORMATION]., This specification covers HY-80 and HY-100 alloy steel bars intended primarily for use in the hulls of combat ships and for other critical structural applications where a notch-tough high-strength material is required.