MIL-S-13281E, MILITARY SPECIFICATION: STEEL, CARBON, ALLOY, AND HIGH STRENGTH LOW ALLOY FOR WELDED STRUCTURES (STRESS RELIEVED) (20 SEP 1985)., This specification covers hot rolled and cold finished carbon, alloy, and high strength low alloy steels in the form of bar, shapes, plate, sheet, and strip intended primarily for use in welded structure which are to be stress relieved after welding.