ASTM A242/A242M-04e1
(Specification)Standard Specification for High-Strength Low-Alloy Structural Steel
Standard Specification for High-Strength Low-Alloy Structural Steel
ABSTRACT
This specification covers high-strength low-alloy structural steel shapes, plates, and bars for welded, riveted, or bolted construction intended primarily for use as structural members where savings in weight (mass) or added durability are important. Steel specimens shall be semi-killed or killed. Heat analysis shall be performed wherein steel specimens shall conform to required chemical compositions of carbon, manganese, phosphorus, sulfur, and copper. Atmospheric corrosion resistance shall be estimated for steel specimens. Specimens shall also undergo tension tests and shall conform to specified values of tensile strength, yield point, and elongation.
SCOPE
1.1 This specification covers high-strength low-alloy structural steel shapes, plates, and bars for welded, riveted, or bolted construction intended primarily for use as structural members where savings in weight [mass] or added durability are important. The atmospheric corrosion resistance of the steel in most environments is substantially better than that of carbon structural steels with or without copper addition. When properly exposed to the atmosphere, this steel can be used bare (unpainted) for many applications (see Note 0). This specification is limited to material up to 4 in. [100 mm], inclusive, in thickness. Note 0For methods of estimating the atmospheric corrosion resistance of low-alloy steels, see Guide G 101.
1.2 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 A 6/A 6M for information on weldability.
1.3 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. Combining values from the two systems may result in nonconformance with the specification.
1.4 For structural products produced from coil and furnished without heat treatment or with stress relieving only, the additional requirements, including additional testing requirements and the reporting of additional test results, of Specification A 6/A 6M apply.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
American Association State
e1
Designation: A 242/A 242M – 04 Highway and Transportation Officials
Standard AASHTO No.: M 161
Standard Specification for
1
High-Strength Low-Alloy Structural Steel
This standard is issued under the fixed designationA242/A242M; 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
e NOTE—The numbering for Tables 1 and 2 was corrected editorially in October 2005.
1. Scope* 2. Referenced Documents
2
1.1 This specification covers high-strength low-alloy struc- 2.1 ASTM Standards:
turalsteelshapes,plates,andbarsforwelded,riveted,orbolted A 6/A 6M Specification for General Requirements for
construction intended primarily for use as structural members Rolled Structural Steel Bars, Plates, Shapes, and Sheet
where savings in weight [mass] or added durability are Piling
important. The atmospheric corrosion resistance of the steel in G 101 Guide for Estimating the Atmospheric Corrosion
most environments is substantially better than that of carbon Resistance of Low-Alloy Steels
structural steels with or without copper addition. When prop-
3. General Requirements for Delivery
erly exposed to the atmosphere, this steel can be used bare
(unpainted) for many applications (see Note 1). This specifi- 3.1 Structural products furnished under this specification
shall conform to the requirements of the current edition of
cation is limited to material up to 4 in. [100 mm], inclusive, in
thickness. Specification A 6/A 6M, for the specific structural product
ordered,unlessaconflictexists,inwhichcasethisspecification
NOTE 1—For methods of estimating the atmospheric corrosion resis-
shall prevail.
tance of low-alloy steels, see Guide G 101.
3.2 Coils are excluded from qualification to this specifica-
1.2 When the steel is to be welded, it is presupposed that a
tion until they are processed into a finished structural product.
welding procedure suitable for the grade of steel and intended
Structural products produced from coil means structural prod-
use or service will be utilized. See Appendix X3 of Specifica-
ucts that have been cut to individual lengths from a coil. The
tion A 6/A 6M for information on weldability.
processor directly controls, or is responsible for, the operations
1.3 The values stated in either inch-pound units or SI units
involved in the processing of a coil into a finished structural
are to be regarded as standard. Within the text, the SI units are
product. Such operations include decoiling, leveling or
shown in brackets. The values stated in each system are not
straightening, hot-forming or cold-forming (if applicable),
exact equivalents; therefore, each system must be used inde-
cutting to length, testing, inspection, conditioning, heat treat-
pendentlyoftheother.Combiningvaluesfromthetwosystems
ment(ifapplicable),packaging,marking,loadingforshipment,
may result in nonconformance with the specification.
and certification.
1.4 For structural products produced from coil and fur-
NOTE 2—For structural products produced from coil and furnished
nished without heat treatment or with stress relieving only, the
without heat treatment or with stress relieving only, two test results are to
additional requirements, including additional testing require-
be reported for each qualifying coil. Additional requirements regarding
ments and the reporting of additional test results, of Specifi-
structural products produced from coil are described in Specification
cation A 6/A 6M apply.
A 6/A 6M.
4. Materials and Manufacture
4.1 The steel shall be semi-killed or killed.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
2
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee For referenced ASTM standards, visit the ASTM website, www.astm.org, or
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved April 1, 2004. Published May 2004. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1941. Last previous edition approved in 2003 asA 242/A 242M – 03a. the ASTM website.
*ASummary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
e1
A 242/A 242M – 04
TABLE 1 Tensile Requirements
A
Plates and Bars Structural Shapes
For thick- For thic
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.