ASTM A242/A242M-04(2009)
(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 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.
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Designation: A242/A242M −04(Reapproved 2009) American Association State
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 (´) 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 2. Referenced Documents
2
1.1 This specification covers high-strength low-alloy struc- 2.1 ASTM Standards:
turalsteelshapes,plates,andbarsforwelded,riveted,orbolted A6/A6M Specification for General Requirements for Rolled
construction intended primarily for use as structural members Structural Steel Bars, Plates, Shapes, and Sheet Piling
where savings in weight [mass] or added durability are G101 Guide for Estimating the Atmospheric Corrosion Re-
important. The atmospheric corrosion resistance of the steel in sistance of Low-Alloy Steels
most environments is substantially better than that of carbon
3. General Requirements for Delivery
structural steels with or without copper addition. When prop-
erly exposed to the atmosphere, this steel can be used bare 3.1 Structural products furnished under this specification
(unpainted) for many applications (see Note 1). This specifi- shall conform to the requirements of the current edition of
cation is limited to material up to 4 in. [100 mm], inclusive, in Specification A6/A6M, for the specific structural product
thickness. ordered,unlessaconflictexists,inwhichcasethisspecification
shall prevail.
NOTE 1—For methods of estimating the atmospheric corrosion resis-
tance of low-alloy steels, see Guide G101.
3.2 Coils are excluded from qualification to this specifica-
tion until they are processed into a finished structural product.
1.2 When the steel is to be welded, it is presupposed that a
Structural products produced from coil means structural prod-
welding procedure suitable for the grade of steel and intended
ucts that have been cut to individual lengths from a coil. The
use or service will be utilized. See Appendix X3 of Specifica-
processor directly controls, or is responsible for, the operations
tion A6/A6M for information on weldability.
involved in the processing of a coil into a finished structural
1.3 The values stated in either inch-pound units or SI units
product. Such operations include decoiling, leveling or
are to be regarded as standard. Within the text, the SI units are
straightening, hot-forming or cold-forming (if applicable),
shown in brackets. The values stated in each system are not
cutting to length, testing, inspection, conditioning, heat treat-
exact equivalents; therefore, each system must be used inde-
ment(ifapplicable),packaging,marking,loadingforshipment,
pendentlyoftheother.Combiningvaluesfromthetwosystems
and certification.
may result in nonconformance with the specification.
NOTE 2—For structural products produced from coil and furnished
1.4 For structural products produced from coil and fur-
without heat treatment or with stress relieving only, two test results are to
nished without heat treatment or with stress relieving only, the
be reported for each qualifying coil. Additional requirements regarding
additional requirements, including additional testing require-
structural products produced from coil are described in Specification
A6/A6M.
ments and the reporting of additional test results, of Specifi-
cation A6/A6M apply.
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,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
2
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2009. Published May 2009. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ϵ1
approved in 1941. Last previous edition approved in 2004 as A242/A242M–04 . Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/A0242_A0242M-04R09. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A242/A242M − 04 (2009)
TABLE 1 Tensile Requirements
A
Plates and Bars Structural Shapes
For thicknesses For thicknesses For thicknesses For flange or For flange For flange
3 3 1 1
⁄4 in.[20 mm], over ⁄4 to 1 ⁄2 in. over1 ⁄2to4i
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
American Association State
´1
Designation:A 242/A 242M–04 Designation: A242/A242M – 04 (ReapprovedHighway and Transportation2009) 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 (´) 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
´ NOTE—The numbering for Tables 1 and 2 was corrected editorially in October 2005.
1. 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 101G101.
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 6A6/A6M/A 6M for information on weldability.
1.3 Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedasstandard.Withinthetext,theSIunitsareshown
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
6MA6/A6M apply.
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.02
on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.
Current edition approved Sept. 27, 2005. Published May 2004. Originally approved in 1941. Last previous edition approved in 2003 as A 242/A 242M–03a.
´1
Current edition approved April 1, 2009. Published May 2009. Originally approved in 1941. Last previous edition approved in 2004 as A242/A242M–04 . DOI:
10.1520/A0242_A0242M-04R09.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
A242/A242M – 04 (2009)
2. Referenced Documents
2
2.1 ASTM Standards:
A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
G101 Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels
3. General Requirements for Delivery
3.1 Structural products furnished under this specification shall conform to the requirements of the current edition of
Specification A 6A6/A6M/A 6M,, for the specific structural product ordered, unless a conflict exists, in which case this
specification shall prevail.
3.2 Coils are excluded from qualification to this specification until they are processed into a finished structural product.
Structural products produced from coil means structural products that have been cut to individual lengths from a coil. The
processor directly controls, or is responsible for, the operations involved in the processing of a coil into a finished structural
product.Suchoperationsincludedecoiling,levelingorstraightening,hot-formingorcold-forming(ifapplicable),cuttingtolength,
testing, inspection, conditioning, heat treatment (if applicable), packaging, marking, loading for shipment, and certification.
NOTE 2—For structural products produced from coil and furnished without heat treatment or with stress relieving only, two test results are to be
reported for each qualifying coil. Additional requirements regarding structural products produced from coil are described i
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
American Association State
Designation:A 242/A 242M–03a Designation: A 242/A 242M – 04 (ReapprovedHighway and Transportation2009) Officials
Standard AASHTO No.: M 161
Standard Specification for
1
High-Strength Low-Alloy Structural Steel
This standard is issued under the fixed designationA 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 (´) 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 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/A6M for information on weldability.
1.3 Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedasstandard.Withinthetext,theSIunitsareshown
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.
2. Referenced Documents
2
2.1 ASTM Standards:
A 6/A 6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
G 101 Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels
3. General Requirements for Delivery
3.1 Structural products furnished under this specification shall conform to the requirements of the current edition of
SpecificationA 6/A 6M/A6M,, for the specific structural product ordered, unless a conflict exists, in which case this specification
shall prevail.
3.2 Coils are excluded from qualification to this specification until they are processed into a finished structural product.
Structural products produced from coil means structural products that have been cut to individual lengths from a coil. The
processor directly controls, or is responsible for, the operations involved in the processing of a coil into a finished structural
product.Suchoperationsincludedecoiling,levelingorstraightening,hot-formingorcold-forming(ifapplicable),cuttingtolength,
testing, inspection, conditioning, heat treatment (if applicable), packaging, marking, loading for shipment, and certification.
NOTE 2—For structural products produced from coil and furnished without heat treatment or with stress relieving only, two test results are to be
reported for each qualifying coil. Additional requirements regarding structural products produced from coil are described in Specification A 6/A 6M.
4. Materials and Manufacture
4.1 The steel shall be semi-killed or killed.
5. Chemical Composition
5.1 The heat analysis shall conform to the requirements prescribed in Table 1Table 2.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel,Steel and Related Alloys,Alloys and is the direct responsibility of
Subcommittee A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock,Stock and Ships.
Current edition approved May 10, 2003.April 1, 2009. Published July 2003.May 2009. Originally approved in 1941. Last previous edition approved in 20032004 as
´1
A242/A242M–03. A 242/A 242M–04 .
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM Standards
, Vol 01.04.volume information, refer to the s
...
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