A514 is a particular type of high strength steel, which is quenched and tempered alloy steel, with a yield strength of 100,000 psi (100 ksi or approximately 700 MPa). The ArcelorMittal trademarked name is T-1.[1] A514 is primarily used as a structural steel for building construction. A517 is a closely related alloy that is used for the production of high-strength pressure vessels.
This is a standard set by the standards organization ASTM International, a voluntary standards development organization that sets technical standards for materials, products, systems, and services.
The tensile yield strength of A514 alloys is specified as at least 100ksi for thicknesses up to 2.5inches thick plate, and at least 110sigfig=3NaNsigfig=3 ultimate tensile strength, with a specified ultimate range of 110-. Plates from 2.5to thick have specified strength of 90sigfig=3NaNsigfig=3 (yield) and 100- (ultimate).[2]
A517 steel has equal tensile yield strength, but slightly higher specified ultimate strength of 115- for thicknesses up to 2.5inches and 105- for thicknesses 2.5to.
A514 steels are used where a weldable, machinable, very high strength steel is required to save weight or meet ultimate strength requirements. It is normally used as a structural steel in building construction, cranes, or other large machines supporting high loads.
In addition, A514 steels are specified by military standards (ETL 18-11) for use as small-arms firing range baffles and deflector plates.[3]