MIL-S-16216 is a specification calling for “MILITARY SPECIFICATION: STEEL PLATE, ALLOY, STRUCTURAL, HIGH YIELD STRENGTH” for HY-80 and HY-100
This specification covers HY-80 and HY-100, sheared or gas cut, alloy steel plate, Intended primarily for use in the hulls of combatant ships and for other critical structural applications where a notch tough high strength material is required. The requirements for HY-80 plate apply up to 8 inches thick, and for HY-100 plate, apply to 5 inches thick.
HY-80 & HY-100 are high-tensile, high yield strength, low alloy steel. They were developed for use in naval applications, specifically the development of pressure hulls for the US nuclear submarine program and is still currently used in many naval applications. It is valued for its strength to weight ratio
HY-80 & HY-100 Steel Plate per MIL-S-16216 Thickness ranges from 0.1875″ to 8.00″ Thick for HY-80 and 5.00″ Thick for HY-100.