ASTM A242/A242M-03a
(Specification)Standard Specification for High-Strength Low-Alloy Structural Steel
Standard Specification for High-Strength Low-Alloy Structural Steel
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 1). This specification is limited to material up to 4 in. [100 mm], inclusive, in thickness.
Note 1—For 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation: A 242/A 242M – 03a 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 designation A 242/A 242M; 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* G 101 Guide for Estimating the Atmospheric Corrosion
3
Resistance of Low-Alloy Steels
1.1 This specification covers high-strength low-alloy struc-
tural steel shapes, plates, and bars for welded, riveted, or bolted
3. General Requirements for Delivery
construction intended primarily for use as structural members
3.1 Structural products furnished under this specification
where savings in weight [mass] or added durability are
shall conform to the requirements of the current edition of
important. The atmospheric corrosion resistance of the steel in
Specification A 6/A 6M, for the specific structural product
most environments is substantially better than that of carbon
ordered, unless a conflict exists, in which case this specification
structural steels with or without copper addition. When prop-
shall prevail.
erly exposed to the atmosphere, this steel can be used bare
3.2 Coils are excluded from qualification to this specifica-
(unpainted) for many applications (see Note 1). This specifi-
tion until they are processed into a finished structural product.
cation is limited to material up to 4 in. [100 mm], inclusive, in
Structural products produced from coil means structural prod-
thickness.
ucts that have been cut to individual lengths from a coil. The
NOTE 1—For methods of estimating the atmospheric corrosion resis-
processor directly controls, or is responsible for, the operations
tance of low-alloy steels, see Guide G 101.
involved in the processing of a coil into a finished structural
1.2 When the steel is to be welded, it is presupposed that a
product. Such operations include decoiling, leveling or
welding procedure suitable for the grade of steel and intended
straightening, hot-forming or cold-forming (if applicable),
use or service will be utilized. See Appendix X3 of Specifica-
cutting to length, testing, inspection, conditioning, heat treat-
tion A 6/A 6M for information on weldability.
ment (if applicable), packaging, marking, loading for shipment,
1.3 The values stated in either inch-pound units or SI units
and certification.
are to be regarded as standard. Within the text, the SI units are
NOTE 2—For structural products produced from coil and furnished
shown in brackets. The values stated in each system are not
without heat treatment or with stress relieving only, two test results are to
exact equivalents; therefore, each system must be used inde-
be reported for each qualifying coil. Additional requirements regarding
pendently of the other. Combining values from the two systems
structural products produced from coil are described in Specification
may result in nonconformance with the specification. A 6/A 6M.
1.4 For structural products produced from coil and fur-
4. Materials and Manufacture
nished without heat treatment or with stress relieving only, the
4.1 The steel shall be semi-killed or killed.
additional requirements, including additional testing require-
ments and the reporting of additional test results, of Specifi-
5. Chemical Composition
cation A 6/A 6M apply.
5.1 The heat analysis shall conform to the requirements
2. Referenced Documents
prescribed in Table 1.
5.2 The steel shall conform on product analysis to the
2.1 ASTM Standards:
requirements prescribed in Table 1, subject to the product
A 6/A 6M Specification for General Requirements for
analysis tolerances in Specification A 6/A 6M.
Rolled Structural Steel Bars, Plates, Shapes, and Sheet
2
5.3 Choice and use of alloying elements, combined with
Piling
carbon, manganese, phosphorus, sulfur, and copper within the
limits prescribed in 5.1 to give the mechanical properties
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
prescribed in Section 6 and to provide the atmospheric corro-
Stainless Steel, and Related Alloys, and is the direct responsibility of Subcommittee
sion resistance of 1.1, shall be made by the manufacturer and
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock, and Ships.
Current edition approved May 10, 2003. Published July 2003. Originally
approved in 1941. Last previous edition approved in 2003 as A 242/A 242M – 03.
2 3
Annual Book of ASTM Standards, Vol 01.04. Annual Book of ASTM Standards,
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.