ASTM A1008/A1008M-05
(Specification)Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, Solution Hardened, and Bake Hardenable
Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, Solution Hardened, and Bake Hardenable
SCOPE
1.1 This specification covers cold-rolled, carbon, structural, high-strength low-alloy, high-strength low-alloy with improved formability, solution hardened, and bake hardenable steel sheet, in coils and cut lengths.
1.2 Cold rolled steel sheet is available in the designations as listed in .
1.3 This specification does not apply to steel strip as described in Specification A 109/A 109M.
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 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.
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Designation: A 1008/A 1008M – 05
Standard Specification for
Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength
Low-Alloy, High-Strength Low-Alloy with Improved
1
Formability, Solution Hardened, and Bake Hardenable
This standard is issued under the fixed designation A 1008/A 1008M; 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.
3
1. Scope* Sheet, Carbon, Cold-Rolled
A 941 Terminology Relating to Steel, Stainless Steel, Re-
1.1 This specification covers cold-rolled, carbon, structural,
lated Alloys, and Ferroalloys
high-strength low-alloy, high-strength low-alloy with im-
E18 Test Methods for Rockwell Hardness and Rockwell
proved formability, solution hardened, and bake hardenable
Superficial Hardness of Metallic Materials
steel sheet, in coils and cut lengths.
E 517 TestMethodforPlasticStrainRatiorforSheetMetal
1.2 Cold rolled steel sheet is available in the designations as
E 646 Test Method for Tensile Strain-Hardening Exponents
listed in 4.1.
(n-Values) of Metallic Sheet Materials
1.3 This specification does not apply to steel strip as
described in Specification A 109/A 109M.
3. Terminology
1.4 The values stated in either inch-pound units or SI units
3.1 Definitions:
are to be regarded separately as standard. Within the text, the
3.1.1 For definitions of other terms used in this specifica-
SI units are shown in brackets. The values stated in each
tion, refer to Terminology A 941.
system are not exact equivalents; therefore, each system must
3.1.2 stabilization—addition of one or more nitride- or
be used independently of the other.
carbide-forming elements, or both, such as titanium and
2. Referenced Documents columbium, to control the level of the interstitial elements of
2
carbon and nitrogen in the steel.
2.1 ASTM Standards:
3.1.2.1 Discussion—Stabilizing improves formability and
A 109/A 109M Specification for Steel, Strip, Carbon (0.25
increases resistance to aging.
Maximum Percent), Cold Rolled
3.1.3 vacuum degassing—process of refining liquid steel in
A 366/A 366M Specification for Commercial Steel (CS),
3
which the liquid is exposed to a vacuum as part of a special
Sheet, Carbon (0.15 Maximum Percentage), Cold-Rolled
technique for removing impurities or for decarburizing the
A 370 Test Methods and Definitions for MechanicalTesting
steel.
of Steel Products
3.2 Definitions of Terms Specific to This Standard:
A 568/A 568M Specification for Steel, Sheet, Carbon, and
3.2.1 aging—loss of ductility with an increase in hardness,
High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled,
yield strength, and tensile strength that occurs when steel that
General Requirements for
has been slightly cold worked (such as by temper rolling) is
A 620/A 620M Specification for Drawing Steel (DS),
stored for some time.
3.2.1.1 Discussion—Aging increases the tendency of a steel
1
to exhibit stretcher strains and fluting.
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
3.2.2 bake hardenable steel—steel in which significant
A01.19 on Steel Sheet and Strip.
aging is realized when moderate heat treatment, such as that
Current edition approved May 1, 2005. Published May 2005. Originally
used for paint baking, follows straining or cold working.
approved in 2000. Last previous edition approved in 2004 as A 1008/
3.2.3 solid-solution hardened steel or solution hardened
A 1008M – 04b.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
steel—steel strengthened through additions of elements, such
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
as Mn, P, or Si, that can be dissolved within the crystalline
Standards volume information, refer to the standard’s Document Summary page on
structure of steels.
the ASTM website.
3
Withdrawn.
*A Summary 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
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A 1008/A 1008M – 05
3.2.3.1 Discussion—Alloying elements that form a solid- 5.1.3 Classification (either exposed, unexposed, temper
solution with iron provide strengthening as a result of local rolled, or annealed last) (see 4.3);
distortions in atomic arrangements, which arise as a result of
5.1.4 Finish (see 9.1);
the mismatch between the atomic sizes of such elements and
5.1.5 Oiled or not oiled, as required (see 9.2);
that of iron.
5.1.6 Dimensions (thickness, thickness tolerance table (see
5.1.6.1), width
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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.
Designation:A1008/A1008M–04b Designation: A 1008/A 1008M – 05
Standard Specification for
Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength
Low-Alloy and High-Strength Low-Alloy with Improved
FormabilitySteel, Sheet, Cold-Rolled, Carbon, Structural,
High-Strength Low-Alloy, High-Strength Low-Alloy with
Improved Formability, Solution Hardened, and Bake
1
Hardenable
This standard is issued under the fixed designation A 1008/A 1008M; 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.
1. Scope*
1.1 Thisspecificationcoverscold-rolled,carbon,structural,high-strengthlow-alloy,andhigh-strengthlow-alloywithimproved
formability, solution hardened, and bake hardenable steel sheet, in coils and cut lengths.
1.2 Cold rolled steel sheet is available in the designations as listed in 4.1.
1.3 This specification does not apply to steel strip as described in Specification A 109/A 109M.
1.4 Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunits
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
2
2.1 ASTM Standards:
A 109/A 109M Specification for Steel, Strip, Carbon (0.25 Maximum Percent), Cold Rolled
3
A 366/A 366M Specification for Commercial Steel (CS), Sheet, Carbon (0.15 Maximum Percentage), Cold-Rolled
A 370 Test Methods and Definitions for Mechanical Testing of Steel Products
A 568/A 568M Specification for Steel, Sheet, Carbon, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, General
Requirements for
3
A 620/A 620M Specification for Drawing Steel (DS), Sheet, Carbon, Cold-Rolled
A 941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
E18 Test Methods for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials
E 517 Test Method for Plastic Strain Ratio r for Sheet Metal
E 646 Test Method for Tensile Strain-Hardening Exponents (n-Values) of Metallic Sheet Materials
3. Terminology
3.1 Definitions:
3.1.1 For definitions of other terms used in this specification, refer to Terminology A 941.
3.1.2 stabilization—addition of one or more nitride- or carbide-forming elements, or both, such as titanium and columbium, to
control the level of the interstitial elements of carbon and nitrogen in the steel.
3.1.2.1 Discussion—Stabilizing improves formability and increases resistance to aging.
3.1.3 vacuum degassing—process of refining liquid steel in which the liquid is exposed to a vacuum as part of a special
technique for removing impurities or for decarburizing the steel.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 aging—loss of ductility with an increase in hardness, yield strength, and tensile strength that occurs when steel that has
been slightly cold worked (such as by temper rolling) is stored for some time.
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.19
on Steel Sheet and Strip.
Current edition approved JulyMay 1, 2004.2005. Published July 2004.May 2005. Originally approved in 2000. Last previous edition approved in 2004 as
A 1008/A 1008M – 04ab.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Withdrawn.
*A Summary 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 ----------------------
A 1008/A 1008M – 05
3.2.1.1 Discussion—Aging increases the tendency of a steel to exhibit stretcher strains and fluting.
3.2.2 bake hardenable steel—steel in which significant aging is realized when moderate heat treatment, such as that used for
paint baking, follows straining or cold working.
3.2.3 solid-solution hardened steel or solution hardened steel—steel strengthened through additions of elements, such as Mn,
P, or Si, that can be dissolved within the crystalline structure of steels.
3.2.3.1 Discussion—Alloying elements that form a solid-solution with iron prov
...
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