STROLOY 5C is a high yield strength alloy steel that is furnished in the water quenched and tempered condition. It is used where good weldability, ductility and toughness are required. It can be welded readily by prescribed are welding procedures and is used in a variety of welded structures such as crane booms and portable drilling rigs. It is supplied as tubing and shapes; for details see Forms Available. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: SA-213. Producer or source: Babcock & Wilcox Company. Originally published July 1967, revised December 1976. See also Alloy Digest SA-410, July 1985.