MIL-S-23009C
MIL-S-23009C, MILITARY SPECIFICATION, STEEL FORGINGS, ALLOY, HIGH YIELD STRENGTH (HY-80 AND HY-100) (10 DEC 1987) ., This specification covers grade HY-80 and grade HY-100 alloy steel forgings intended for critical structural applications where a weldable, high-strength, high-toughness material is required.
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