Designation: A 1026 – 03
An American National Standard
Standard Specification for
Alloy Steel Structural Shapes for Use in Building Framing
1
This standard is issued under the fixed designation A 1026; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 This specification covers Grades 50 [345] and 65 [450]
alloy steel “W” shapes (rolled wide flange shapes) intended for
use in building framing. This steel is a low carbon, copper-
containing, alloy steel with a bainitic microstructure that is
developed through the control of chemical composition and the
use of thermo-mechanical rolling followed by air cooling. The
copper is present to enhance precipitation strengthening.
1.2 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.
1.3 The shapes are not intended to be galvanized or to be
post-weld heat treated at temperatures exceeding 750 °F [400
°C].
1.4 The values stated in either inch-pound units or SI units
are to be regarded separately as standard. Within the text, the
SI values are shown in brackets. The values stated in each
system are not exact equivalents; therefore, each system is to
be used independently of the other, without combining values
in any way.
1.5 The text of this specification contains notes or footnotes,
or both, that provide explanatory material; such notes and
footnotes, excluding those in tables and figures, do not contain
any mandatory requirements.
2. Referenced Documents
2.1 ASTM Standards:
A 6/A 6M Specification for General Requirements for
Rolled Structural Steel Bars, Plates, Shapes, and Sheet
Piling
2
A 673/A 673M Specification for Sampling Procedure for
Impact Testing of Structural Steel
2
3. General Requirements
3.1 Product furnished under this specification shall conform
to the requirements of the current edition of Specification A
6/A 6M for the ordered product, unless a conflict exists, in
which case this specification shall prevail.
4. Materials and Manufacture
4.1 The steel shall be made to fine grain practice.
4.2 The shapes shall be produced by a controlled process
that incorporates thermo-mechanical rolling followed by air
cooling to result in a precipitation-strengthened bainitic micro-
structure.
5. Chemical Composition
5.1 The heat analysis shall conform to the requirements
given in Table 1.
5.2 The product analysis shall conform to the requirements
given in Table 1 subject to the variations in product analysis
that are permitted in Specification A 6/A 6M.
5.3 Where the amount of tin is less than 0.02 %, it shall be
permissible for the heat or product analysis, whichever is
applicable, to be reported as “< 0.02 %.”
6. Mechanical Properties
6.1 Tension Test—The product as represented by the test
specimens shall conform to the requirements for tensile prop-
erties given in Table 2.
6.2 Impact Test:
6.2.1 Charpy V-notch tests shall be made in accordance with
Specification A 673/A 673M, Frequency H.
6.2.2 Test results for full-size test specimens shall meet a
minimum average value of 40 ft·lbf [54 J] at 70 °F [21 °C] or
a lower test temperature as specified in the purchase order.
7. Keywords
7.1 alloy steel; bainitic steel; building framing; copper;
precipitation strengthening; shapes; structural shapes; welded
construction
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships .
Current edition approved April 10, 2003. Published June 2003.
2
Annual Book of ASTM Standards, Vol 01.04.
1
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
Copyright ASTM International
Provided by IHS under license with ASTM
Not for Resale
No reproduction or networking permitted without license from IHS
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