Full Description

1.1 This specification covers quenched-and-tempered alloy steel and high-strength low-alloy steel plates for piping components and welded pressure vessels.

1.2 Two types are covered, which provide two different chemical compositions with the same tensile requirements. Both types are quenched-and-tempered to enhance mechanical properties.

1.2.1 Type A is an alloy steel intended for use at low ambient temperatures of -80 therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.