Standard Specification for Normalized High-Strength Low-Alloy Structural Steel
|Publication Date:||31 August 1979|
This specification covers normalized high-strength low-alloy structural steel plates, shapes, and bars for welded, riveted, or bolted construction.
This material is particularly suited for service at low ambient temperatures of -50degrees F (-45 degrees C) and higher where notch toughness better than that expected in as-rolled material of a comparable strength level is desired.
Four grades, designated Grades A, C, D, and E (essentially former Specification A 633 without a grade designation) are covered by this specification. Grade A provides a minimum yield point of 42 ksi (290 MPa) in thicknesses through 4 in. (102 mm), inclusive. Grades C and D provide a minimum yield point of 50 ksi (345 MPa) in thicknesses up to 2.50 in. (64 mm), inclusive and 46.0 ksi (315 MPa) in thicknesses over 2.50 in. to 4.0 in., inclusive. Grade E provides a minimum yield point of 60 ksi (415 MPa) in thicknesses up to 4.0 in., inclusive and 55 ksi (380 MPa) in thicknesses over 4 in. to 6 in. (152 mm), inclusive.
Current practice normally limits plates furnished under this specification to the maximum thicknesses. This individual manufacturer should be consulted on size limitions for other product forms.
NOTE - The values stated in inch-pound units are to be regarded as the standard.