Standard Specification for High-Strength Low-Alloy Structural Steel with 50 ksi (345 MPa) Minimum Yield Point to 4 in. (100 mm) Thick
|Publication Date:||10 September 1997|
|ICS Code (Heat-treatable steels):||77.140.10|
This specification covers high-strength low-alloy structural steel shapes, plates, and bars for welded, riveted, or bolted construction but intended primarily for use in welded bridges and buildings where savings in weight or added durability are important. The atmospheric corrosion resistance of this steel in most environments is substantially better than that of carbon structural steels with or without copper addition (see Note 1). When properly exposed to the atmosphere, this steel is suitable for many applications in the bare (unpainted) condition. This specification is limited to material up to 8 in. [200 mm] inclusive in thickness.
NOTE 1-For methods of estimating the atmospheric corrosion resistance of low-alloy steels, see Guide G 101.
When the steel is to be welded, a welding procedure suitable for the grade of steel and intended use or service is to be utilized. See Appendix X3 of Specification A 6/A 6M for information on weldability.
Supplementary requirements are provided for use where additional testing or additional restrictions are desired by the purchaser. Such requirements apply only when specified in the purchase order.
For Group 4 and Group 5 wide-flange shapes for use in tension, it is recommended that the purchaser consider specifying supplemenatary requirements, such as fine austenitic grain size and Charpy V-notch impact testing.
The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other, without combining values in any way.
The text of this specification contains notes, footnotes, or both, that provide explanatory material. Such notes and footnotes, excluding those in tables and figures, do not contain any mandatory requirements.