MIL-T-6737C, MILITARY SPECIFICATION: TUBING, STEEL, CORROSION AND HEAT RESISTING (18-8 STABILIZED), WELDED (01 DEC 1982) [S/S BY SAE-AMS5575 AND SAE-AMS5576]., This specification prescribes the requirements for welded tubing of stabilized corrosion-resisting and heat-resisting steel in the annealed condition.