ASTM A656 - A 656M - 24 具有改良可模锻性的高强度低合金热轧结构钢板

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Designation: A656/A656M −24
Standard Speciﬁcation for
Hot-Rolled Structural Steel, High-Strength Low-Alloy Plate
with Improved Formability
1
This standard is issued under the ﬁxed designation A656/A656M; 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 This speciﬁcation covers three types and ﬁve strength
grades of high-strength low-alloy, hot-rolled structural steel
plate for use in truck frames, brackets, crane booms, rail cars,
and similar applications. Steels that conform to this speciﬁca-
tion offer improved formability. These steels are normally
furnished in the as-rolled condition. The type and strength
grade furnished is as agreed upon between the manufacturer
and the purchaser. The types and strength grades are shown in
the tables.
1.2 The maximum thickness of plates shall be as follows:
Grade Plate Thickness, max,
in. [mm]
50 2 [50]
60 1
1
⁄
2
[40]
70 1 [25]
80 1 [25]
100
1
⁄
2
[13]
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 inde-
pendently of the other. Combining values from the two systems
may result in nonconformance with this speciﬁcation.
1.4 For plates 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 A6/A6M
apply.
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
A6/A6M Speciﬁcation for General Requirements for Rolled
Structural Steel Bars, Plates, Shapes, and Sheet Piling
3. General Requirements for Delivery
3.1 Plates furnished under this speciﬁcation shall conform
to the requirements of the current edition of Speciﬁcation
A6/A6M, for the speciﬁc plate ordered, unless a conﬂict exists,
in which case this speciﬁcation shall prevail.
3.2 Coils are excluded from qualiﬁcation to this speciﬁca-
tion until they are processed into ﬁnished plates. Plates
produced from coil means plates 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 ﬁnished plates. Such operations include decoiling,
leveling, cutting to length, testing, inspection, conditioning,
heat treatment (if applicable), packaging, marking, loading for
shipment, and certiﬁcation.
NOTE 1—For plates 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 plate produced
from coil are described in Speciﬁcation A6/A6M.
4. Materials and Manufacture
4.1 The steel shall be made to ﬁne grain practice.
5. Chemical Composition
5.1 Heat analyses shall conform to the chemical require-
ments given in Table 1. Dependent upon thickness, grade, and
intended application, variations in the chemical composition
are permitted within the limits given in Table 1 for the
applicable type. Where it is of particular importance, the
manufacturer should be consulted for speciﬁc chemical com-
position.
5.2 Product Analysis—When a purchaser speciﬁes a product
analysis in accordance with Supplementary Requirement S2, it
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
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.
Current edition approved March 1, 2024. Published March 2024. Originally
approved in 1972. Last previous edition approved in 2018 as A656/A656M – 18.
DOI: 10.1520/A0656_A0656M-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

shall conform to the requirements given in Table 1, subject to

the product analysis tolerances of Speciﬁcation A6/A6M.

5.3 Where 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 Speciﬁca-

tion A6/A6M for information on weldability.

5.4 Unless speciﬁcally ordered, the type is at the discretion

of the producer.

6. Mechanical Properties

6.1 Tensile Properties:

6.1.1 The plates as represented by the test specimens shall

conform to the requirements given in Table 2.

7. Keywords

7.1 high-strength low-alloy steel; steel plates; structural

applications

SUPPLEMENTARY REQUIREMENTS

Standardized supplementary requirements for use at the option of the purchaser are listed in

Speciﬁcation A6/A6M. Those that are considered suitable for use with this speciﬁcation are listed by

title:

S2. Product Analysis.

TABLE 1 Chemical Requirements

NOTE 1—An ellipsis (. . .) indicates that element is not deﬁned for that Type.

Elements Composition, %

Type 3 Type 7 Type 8

Carbon, max

0.18 0.18 0.18

Manganese, max

1.65 1.65 1.65

Phosphorus, max 0.025 0.025 0.025

Sulfur, max 0.030 0.030 0.030

Silicon, max 0.60 0.60 0.60

Vanadium, max 0.08 0.15

0.15

Nitrogen, max 0.030 0.030 0.030

Columbium (niobium)

0.008–0.10 0.10 max

0.10 max

Titanium, max . . . . . . 0.15

For each reduction of 0.01 percentage point below the speciﬁed maximum for carbon, an increase of 0.06 percentage points above the speciﬁed maximum for

manganese is permitted, up to a maximum of 1.75 % for Grades 50, 60, and 70 [345, 415, and 485 MPa]; up to a maximum of 1.90 % for Grade 80 [550]; and up to a

maximum of 2.10 % for Grade 100 [690].

The contents of columbium (niobium) and vanadium shall additionally be in accordance with one of the following:

Columbium (niobium) 0.008 % to 0.10 % with vanadium <0.008 %;

Columbium (niobium) <0.008 % with vanadium 0.008 % to 0.15 %; or

Columbium (niobium) 0.008 % to 0.10 % with vanadium 0.008 % to 0.15 % and columbium (niobium) plus vanadium not in excess of 0.20 %.

The sum of columbium (niobium), vanadium, and titanium shall be between 0.008 % and 0.20 %.

Columbium and niobium are interchangeable names for the same element.

TABLE 2 Tensile Requirements

Grade 50

[345]

Grade 60

[415]

Grade 70

[485]

Grade 80

[550]

Grade 100

[690]

Yield point, min, ksi [MPa] 50 [345] 60 [415] 70 [485] 80 [550] 100 [690]

Tensile strength, min, ksi [MPa] 60 [415] 70 [485] 80 [550] 90 [620] 110 [760]

Elongation in 8 in. [200 mm], min, % 20

Elongation in 2 in. [50 mm], min, % 23

See Specimen Orientation under the Tension Tests section of Speciﬁcation A6/A6M.

For plates wider than 24 in. [600 mm], the elongation requirement is reduced two percentage points for Grade 50 [345] and three percentage points for Grades 60, 70,

80, and 100 [415, 485, 550, and 690]. See Elongation Requirement Adjustments in the Tension Tests section of Speciﬁcation A6/A6M.

A656/A656M − 24

SUMMARY OF CHANGES

Committee A01 has identiﬁed the location of selected changes to this standard since the last issue

(A656/A656M – 18) that may impact the use of this standard. (Approved March 1, 2024.)

(1) Revised 5.2.(2) Added Supplementary Requirement S2.

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned

in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk

of infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ﬁve years and

if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards

and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the

responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should

make your views known to the ASTM Committee on Standards, at the address shown below.

This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,

United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above

address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website

(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222

Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http://www.copyright.com/

A656/A656M − 24

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标签： #钢板 #低合金 #热轧结构

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ASTM A656/A656M-2024 Standard Specification for Hot-Rolled Structural Steel, High-Strength Low-Alloy Plate with Improved Formability 具有改良可模锻性的高强度低合金热轧结构钢板

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ASTM A656 - A 656M - 24 具有改良可模锻性的高强度低合金热轧结构钢板

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