ASTM A 1008 A 1008M-04

ASTM A 1008 A 1008M-04 specifies requirements for for general applications.

Standard Specification for
Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength
Low-Alloy and High-Strength Low-Alloy with Improved
Formability 1
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.
1. Scope*
1.1 This specification covers cold-rolled structural, high-
strength low-alloy, and high-strength low-alloy with improved
formability 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.
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.
2. Referenced Documents
2.1 ASTM Standards:
2
A 109/A 109M Specification for Steel, Strip, Carbon (0.25
Maximum Percent), Cold Rolled
A 366/A 366M Specification for Commercial Steel (CS),
Sheet, Carbon (0.15 Maximum Percentage), Cold-Rolled 3
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
A 620/A 620M Specification for Drawing Steel (DS),
Sheet, Carbon, Cold-Rolled 3
A 941 Terminology Relating to Steel, Stainless Steel, Re-
lated Alloys, and Ferroalloys
E 18 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 specifica-
tion, refer to Terminology A 941.
3.1.2 stabilization—the 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—a 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.
3.2.1.1 Discussion—Aging increases the tendency of a steel
to exhibit stretcher strains and fluting.
4. Classification
4.1 Cold-rolled steel sheet is available in the following
designations:
4.1.1 Commercial Steel (CS Types A, B, and C),
4.1.2 Drawing Steel (DS Types A and B),
N OTE 1—CS Type B and DS Type B describe the most common
product previously included, respectively, in Specifications A 366/
A 366M and A 620/A 620M.
4.1.3 Deep Drawing Steel (DDS),
4.1.4 Extra Deep Drawing Steel (EDDS),
4.1.5 Structural Steel (SS grades 25[170], 30[205], 33[230]
Types 1 and 2, 40[275] Types 1 and 2, 50[340], 60[410],
70[480], and 80[550]).