ASTM A1008 - A 1008M - 24 高强度低合金和改性高强度低合金冷轧结构碳钢板材规范

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Designation: A1008/A1008M −24
Standard Speciﬁcation for
Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength
Low-Alloy, High-Strength Low-Alloy with Improved
Formability, Required Hardness, Solution Hardened, and
Bake Hardenable
1
This standard is issued under the ﬁxed designation A1008/A1008M; 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 U.S. Department of Defense.
1. Scope*
1.1 This speciﬁcation covers cold-rolled, carbon, structural,
high-strength low-alloy, high-strength low-alloy with im-
proved formability, required hardness, full hard, 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 A109/A109M.
1.4 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
with the standard.
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
2
A109/A109M Speciﬁcation for Steel, Strip, Carbon (0.25
Maximum Percent), Cold-Rolled
A370 Test Methods and Deﬁnitions for Mechanical Testing
of Steel Products
A568/A568M Speciﬁcation for Steel, Sheet, Carbon,
Structural, and High-Strength, Low-Alloy, Hot-Rolled and
Cold-Rolled, General Requirements for
A941 Terminology Relating to Steel, Stainless Steel, Related
Alloys, and Ferroalloys
A1092 Speciﬁcation for Steel Sheet, as Cold-Reduced, for
Conversion to Annealed Cold-Rolled Steel Sheet, and Hot
Dip Metallic-Coated Steel Sheet
E18 Test Methods for Rockwell Hardness of Metallic Ma-
terials
E517 Test Method for Plastic Strain Ratio rfor Sheet Metal
E646 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 A941.
3.2 Deﬁnitions of Terms Speciﬁc to This Standard:
3.2.1 aging, n—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.
3.2.2 Bake Hardenable Steel (BHS), n—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 Full Hard Steel (FHS), n—steel that is cold reduced
and exhibits a microstructure consisting of non-recrystallized
grains.
3.2.3.1 Discussion—Chemical composition shall be deter-
mined by the producer unless there is prior agreement between
producer and user, or seller and buyer.
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
A01.19 on Steel Sheet and Strip.
Current edition approved May 1, 2024. Published May 2024. Originally
approved in 2000. Last previous edition approved in 2023 as A1008/
A1008M – 23
ɛ1
. DOI: 10.1520/A1008_A1008M-24.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM 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.
*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
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
1

3.2.4 inclusion control, n—the process of reducing the
volume fraction of inclusions or modifying the shape of
inclusions to improve formability, weldability, and machinabil-
ity.
3.2.4.1 Discussion—Inclusions, especially those elongated
during the rolling process, create the conditions for initiating or
propagating cracks, or both, when the material is stretched or
bent during the manufacture of a part. The adverse effects of
inclusions are minimized by reducing the content of inclusions
in the steel or by altering the shape of inclusions, or both,
through the use of additions during the steelmaking process
that change the elongated shape of the inclusions to less
harmful small, well dispersed globular inclusions.
3.2.5 Required Hardness Steel (RHS), n—steel that adheres
to a speciﬁed hardness range, at the time of shipment; may also
be referenced as Speciﬁed Hardness Steel.
3.2.5.1 Discussion—Chemical composition shall be deter-
mined by the producer unless there is prior agreement between
producer and user, or seller and buyer.
3.2.6 Solid-solution Hardened Steel or Solution Hardened
Steel (SHS), n—steel strengthened through additions of
elements, such as Mn, P, or Si, that can be dissolved within the
crystalline structure of steels.
3.2.6.1 Discussion—Alloying elements that form a solid-
solution with iron provide strengthening as a result of local
distortions in atomic arrangements, which arise as a result of
the mismatch between the atomic sizes of such elements and
that of iron.
3.2.7 Special Forming Steel (SFS), n—steel ordered to 1010
chemistry or greater levels of carbon, manganese or both,
which exhibits enhanced formability or mechanical properties.
3.2.7.1 Discussion—Steel grades such as CS – 1010 or CS –
1020 for example, adhere to chemistry requirements only,
whereas SFS – 1010 or SFS – 1020, also provide enhanced
formability. Due to greater carbon content, SFS – 1020 is not
as formable as SFS – 1010.
3.2.8 stabilization, n—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.
3.2.8.1 Discussion—Stabilizing improves formability and
increases resistance to aging.
3.2.9 vacuum degassing, n—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.
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 Commercial Steel (CS Types A and B combined with
chemistry grade in accordance with Speciﬁcation A568/
A568M Table X2.3.
4.1.3 Drawing Steel (DS Types A and B, as speciﬁed in
Table 1).
4.1.4 Drawing Steel (DS Type A and B combined with
chemistry grade in accordance with Speciﬁcation A568/
A568M Table X2.3.
4.1.5 Commercial Steel Chemistry grade in accordance with
Speciﬁcation A568/A568M Table X2.1, with no type speciﬁed
(CS – 1005, CS – 1008, CS – 1020, and so forth).
4.1.6 Special Forming Steel (SFS), chemistry as speciﬁed in
Table 1 with carbon and manganese limits in accordance with
Speciﬁcation A568/A568M Tables X2.1 or X2.2 (examples:
SFS – 1010, SFS – 1020, SFS – C 0.12 % to 0.18 % and Mn
0.50 % to 0.80 %).
4.1.7 Deep Drawing Steel (DDS).
4.1.8 Extra Deep Drawing Steel (EDDS).
4.1.9 Structural Steel (SS Grades 25 [170], 30 [205], 33
[230] Types 1 and 2, 40 [275] Types 1 and 2, 45 [310], 50
[340], 60 [410], 70 [480], and 80 [550]).
TABLE 1 Chemical Composition for Cold Rolled Steel Sheet Designations CS, DS, DDS, EDDS, and SFS
% Heat Analysis, Element Maximum Unless Otherwise Shown
Designation C Mn P S Al Si Cu Ni Cr
A
Mo V Cb/Nb
B
Ti N B
CS Type A
C,D,E,F
0.10 0.60 0.025 0.035
G G
0.20
H
0.20 0.15 0.06 0.008 0.008 0.025
G G
CS Type B
C
0.02–0.15 0.60 0.025 0.035
G G
0.20
H
0.20 0.15 0.06 0.008 0.008 0.025
G G
CS Type C
C,D,E,F
0.08 0.60 0.10 0.035
G G
0.20
H
0.20 0.15 0.06 0.008 0.008 0.025
G G
DS Type A
D,I
0.08 0.50 0.020 0.020 0.01 min
G
0.20 0.20 0.15 0.06 0.008 0.008 0.025
G G
DS Type B 0.02–0.08 0.50 0.020 0.020 0.02 min
G
0.20 0.20 0.15 0.06 0.008 0.008 0.025
G G
DDS
E,F
0.06 0.50 0.020 0.020 0.01 min
G
0.20 0.20 0.15 0.06 0.008 0.008 0.025
G G
EDDS
J
0.02 0.40 0.020 0.020 0.01 min
G
0.10 0.10 0.15 0.03 0.10 0.10 0.15
G G
SFS
K K
0.020 0.020 0.01 min
G
0.20 0.20 0.15 0.06 0.008 0.008 0.025
G G
A
Chromium is permitted, at the producer’s option, to 0.25 % maximum when the carbon content is less than or equal to 0.05 %.
B
Columbium (Cb) and niobium (Nb) are considered interchangeable names for Element 41 in the periodic table and both names are acceptable for use.
C
When an aluminum deoxidized steel is required for the application, it is permissible to order Commercial Steel (CS) to a minimum of 0.01 % total aluminum.
D
Specify Type B to avoid carbon levels below 0.02 %.
E
It is permissible to furnish as a vacuum degassed or chemically stabilized steel, or both, at the producer’s option.
F
For carbon levels less than or equal to 0.02 %, it is permissible to use vanadium, columbium or titanium, or a combination thereof, as stabilizing elements at the producer’s
option. In such cases, the applicable limit for vanadium or columbium shall be 0.10 % max. and the limit on titanium shall be 0.15 % max.
G
There is no speciﬁed limit, but the analysis shall be reported.
H
When copper steel is speciﬁed, the copper limit is a minimum requirement. When copper steel is not speciﬁed, the copper limit is a maximum requirement.
I
If produced utilizing a continuous anneal process, stabilized steel is permissible at the producer’s option, and Footnotes E and F apply.
J
Shall be furnished as a vacuum degassed and stabilized steel.
K
Carbon and manganese chemistry limits shall be speciﬁed in accordance with Speciﬁcation A568/A568M Tables X2.1 or X2.2.
A1008/A1008M − 24
2

4.1.10 High-strength Low-alloy Steel (HSLAS, in Classes 1
and 2, in Grades 45 [310], 50 [340], 55 [380], 60 [410], 65
[450], and 70 [480] in Classes 1 and 2).
4.1.11 High-strength Low-alloy Steel with Improved Form-
ability (HSLAS-F Grades 50 [340], 60 [410], 70 [480], and 80
[550]).
4.1.11.1 HSLAS-F steel has improved formability when
compared to HSLAS. The steel is fully deoxidized, made to
ﬁne grain practice and includes microalloying elements such as
columbium, vanadium, zirconium, and so forth. The steel shall
be treated to achieve inclusion control.
4.1.12 Solution Hardened Steel (SHS).
4.1.13 Bake Hardenable Steel (BHS).
4.1.14 Required Hardness Steel (RHS).
4.1.15 Full Hard Steel (FHS).
4.2 When required for HSLAS and HSLAS-F steels, limi-
tations on the use of one or more of the microalloy elements
shall be speciﬁed on the order.
4.3 Cold-rolled steel sheet is supplied for either exposed or
unexposed applications. Within the latter category, cold-rolled
sheet is speciﬁed either “temper rolled” or “annealed last” or
“full hard.” For details on processing, attributes and
limitations, and inspection standards, refer to Speciﬁcation
A568/A568M.
5. Ordering Information
5.1 It is the purchaser’s responsibility to specify in the
purchase order all ordering information necessary to describe
the required material. Examples of such information include,
but are not limited to, the following:
5.1.1 ASTM speciﬁcation number and year of issue.
5.1.2 Name of material and designation (cold-rolled steel
sheet) (include grade, type, and class, as appropriate, for CS,
DS, DDS, EDDS, SFS, SS, HSLAS, HSLAS-F, RHS, FHS,
SHS, or BHS) (see 4.1).
5.1.2.1 When a Chemistry grade is speciﬁed in accordance
with Speciﬁcation A568/A568M Table X2.3, the grade shall be
furnished as CS Type B – 1008, DS Type A – 1005, and so
forth.
5.1.2.2 When a Chemistry grade is speciﬁed in accordance
with Speciﬁcation A568/A568M Table X2.1, with no reference
to CS Type A, CS Type B, DS Type A, DS Type B, or SFS, the
grade shall be furnished as CS – 1005, CS – 1008, CS – 1020,
and so forth, and meet chemistry speciﬁed in accordance with
Speciﬁcation A568/A568M Table X2.1.
5.1.2.3 When a type is not speciﬁed for CS or DS and there
is no reference to a chemistry grade such as 1005, 1006, and so
forth, Type B will be furnished (see 4.1).
5.1.2.4 When SFS is speciﬁed, a chemistry grade designa-
tion shall also be speciﬁed in accordance with Speciﬁcation
A568/A568M Table X2.1 (that is, 1010, 1020, and so forth), or
carbon and manganese in accordance with Speciﬁcation A568/
A568M Table X2.2 (that is, C 0.12 % to 0.18 %, Mn 0.50 % to
0.80 %, and so forth). The characteristics identifying the
enhanced formability or mechanical properties shall be speci-
ﬁed by the user or purchaser, on the purchase order. If
requested, the producer or seller shall provide veriﬁcation of
special practices or mechanical properties supporting enhanced
formability.
5.1.2.5 When a class is not speciﬁed for HSLAS, Class 1
will be furnished (see 4.1).
5.1.2.6 When a type is not speciﬁed for SS 33 [230] and SS
40 [275], Type 1 will be furnished (see 4.1).
5.1.3 Classiﬁcation (either exposed, unexposed, temper
rolled, or annealed last) (see 4.3).
5.1.4 Finish (see 9.1).
5.1.5 Oiled or not oiled, as required (see 9.2).
5.1.6 Dimensions (thickness, width, and whether cut lengths
or coils).
NOTE 1—Not all producers are capable of meeting all the limitations of
the thickness tolerance tables in Speciﬁcation A568/A568M. The pur-
chaser should contact the producer regarding possible limitations prior to
placing an order.
5.1.7 Coil size (must include inside diameter, outside
diameter, and maximum weight).
5.1.8 Copper bearing steel (if required).
5.1.9 Quantity.
5.1.10 Application (part identiﬁcation and description).
5.1.11 A report of heat analysis will be supplied, if
requested, for CS, DS, DDS, EDDS, SFS, RHS, and FHS. For
materials with required mechanical properties, SS, HSLAS,
HSLAS-F, SHS, and BHS, a report is required of heat analysis
and mechanical properties as determined by the tension test.
5.1.12 Special requirements (if any).
5.1.12.1 When the purchaser requires thickness tolerances
for
3
⁄
8
in. [10 mm] minimum edge distance (see Supplementary
Requirement in Speciﬁcation A568/A568M), this requirement
shall be speciﬁed in the purchase order or contract.
5.1.12.2 Tighter requirements can be speciﬁed based on
agreement between seller and purchaser.
NOTE 2—A typical ordering description is as follows:
ASTM A1008-XX, cold rolled steel sheet, CS Type A, exposed, matte
ﬁnish, oiled, 0.035 in. by 30 in. by coil, ID 24 in., OD 48 in., max weight
15 000 lbs, 100 000 lb, for part No. 4560, Door Panel; or
ASTM A 1008M-XX, cold-rolled steel sheet, SS Grade 275,
unexposed, matte ﬁnish, oiled, 0.88 mm by 760 mm by 2440 mm,
10 000 kg, for shelf bracket.
6. General Requirements for Delivery
6.1 Material furnished under this speciﬁcation shall con-
form to the applicable requirements of the current edition of
Speciﬁcation A568/A568M unless otherwise provided herein.
7. Chemical Composition
7.1 The heat analysis of the steel shall conform to the
chemical composition requirements of the appropriate desig-
nation shown in Table 1 for CS, DS, DDS, EDDS, and SFS,
and in Table 2 for SS, HSLAS, HSLAS-F, SHS, and BHS.
7.2 Each of the elements listed in Tables 1 and 2, and
Speciﬁcation A568/A568M Table X2.3 shall be included in the
report of the heat analysis. When the amount of copper, nickel,
chromium, or molybdenum is less than 0.02 %, report the
analysis as <0.02 % or the actual determined value. When the
amount of vanadium, columbium, or titanium is less than
A1008/A1008M − 24
3

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标签： #低合金 #冷轧结构 #碳钢板

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ASTM A1008/A1008M-2024 Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, tructural, High-Strength Low-Alloy and High-Strength Low-Alloy with Improved Formability 高强度低合金和改性高强度低合金冷轧结构碳钢板材规范

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