Abstract
This specification covers high-strength carbon-manganese steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of buildings and for general structural purposes. Materials considered here are available in Grades 50 [345] and 55 [380]. Steel specimens shall be killed, and as such, be affirmed in the corresponding test report. Heat and product analysis shall be performed wherein steel materials shall conform to the required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, copper, columbium, chromium, nickel, molybdenum, and vanadium. Steel specimens shall also undergo tensile tests and shall conform to required values of tensile strength, yield strength, and elongation.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1. Scope
1.1 This specification covers carbon-manganese steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of buildings and for general structural purposes.
1.2 Material under this specification is available in two grades:
| Grade | Yield Strength,
ksi [MPa] | Thickness |
| 50 [345] | 50 [345] | Plates to 1 in. [25 mm] thick
to 15 in. [380 mm] wide |
| | Bars to 3½ in. [90 mm] |
| | Shapes with flange or leg thickness to
1½ in. [40 mm] inclusive |
| 55 [380] | 55 [380] | Plates to 1 in. [25 mm] thick
to 15 in. [380 mm] wide |
| | Bars to 3 in. [75 mm] |
| | Shapes with flange or leg thickness to
1½ in. [40 mm] inclusive |
1.3 When the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized. See Appendix X3 of Specification A6/A6M for information on weldability.
1.4 The values stated in either inch-pound units or SI units are to be regarded 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.
2. Referenced Documents (purchase separately) 
The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
Keywords
bars; bolted construction; carbon; frames; metal building systems; plates; riveted construction; shapes; steel; structural steel; trusses; welded construction; Carbon steel bars/shapes--specifications; Carbon steel plate--specifications; Framework; High-strength structural steel--specifications; Metal buildings; Open-hearth steel--specifications; Riveted construction--specifications; Steel bars and shapes--specifications; Structural steel (SS)--specifications; Bolted construction materials/applications--specifications; Carbon-manganese steel--specifications; Structural steel (SS) bars--specifications; Structural steel (SS) plate--specifications; Structural steel (SS) shapes--specifications; Trusses; Welded steel materials/applications--specifications;
ICS Code
ICS Number Code 77.140.10 (Heat-treatable steels)
DOI: 10.1520/A0529_A0529M-05R09
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