ASTM A696 - 17 (2022)

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Designation: A696 −17 (Reapproved 2022)
Standard Speciﬁcation for
Steel Bars, Carbon, Hot-Wrought or Cold-Finished, Special
Quality, for Pressure Piping Components
1
This standard is issued under the ﬁxed designation A696; 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
2
covers hot-wrought and cold-
ﬁnished special quality carbon steel bars, in straight lengths
only, subject to mechanical property requirements and intended
for use in manufacturing components for pressure piping and
other pressure-containing applications.
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
and are not considered standard.
1.3 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:
3
A29/A29M Speciﬁcation for General Requirements for Steel
Bars, Carbon and Alloy, Hot-Wrought
A370 Test Methods and Deﬁnitions for Mechanical Testing
of Steel Products
2.2 ASME Standard:
4
ASME Boiler and Pressure Vessel Code
3. Classiﬁcation
3.1 The bars are furnished in two grades as follows:
3.1.1 Grade B—Tensile strength 60 000 psi (415 MPa),
minimum; yield strength 35 000 psi (240 MPa), minimum.
3.1.2 Grade C—Tensile strength 70 000 psi (485 MPa),
minimum; yield strength 40 000 psi (275 MPa), minimum.
3.2 The bars are intended for machining, welding, hot
forming, and threading by machining or cold rolling.
4. Ordering Information
4.1 Orders for material under this speciﬁcation should
include the following information:
4.1.1 Quantity (weight or number of bars),
4.1.2 Name of material (carbon steel bars),
4.1.3 Condition: hot wrought or cold ﬁnished (5.4.1),
4.1.4 Finish (if descaled required, so state) (8.1),
4.1.5 Dimensions (diameter, thickness, width, and length),
4.1.6 Cross section (round, square, hexagon),
4.1.7 ASTM designation and date of issue,
4.1.8 Grade (Table 1 and Table 2),
4.1.9 End use, and
4.1.10 Additions to the speciﬁcation and supplementary
requirements, if required.
NOTE 1—A typical ordering description is as follows: 10 000 lb, Carbon
Steel Bars, Hot Wrought, Descaled, 1.000 in. diameter by 10 ft, Round,
ASTM A696 dated ______, Grade B; Supplementary Requirement S1
Straightness 0.125 in. in any 5 ft.
5. Materials and Manufacture
5.1 Melting Practice—The steel may be produced by any
commercially viable primary steelmaking process. The pri-
mary melting may incorporate separate degassing or reﬁning,
and may be followed by secondary melting using electroslag
remelting or vacuum arc remelting. Where secondary melting
is employed, the heat shall be deﬁned as all of the ingots
remelted from a single primary heat.
5.2 Deoxidation—The steel shall be fully killed.
5.3 Quality—The bars shall be special quality.
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
A01.15 on Bars.
Current edition approved Sept. 1, 2022. Published September 2022. Originally
approved in 1974. Last previous edition approved in 2017 as A696 – 17. DOI:
10.1520/A0696-17R22.
2
For ASME Boiler and Pressure Vessel Code Applications, see related Speciﬁ-
cation SA-696 in Section II of that Code.
3
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.
4
Available from American Society of Mechanical Engineers (ASME), ASME
International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
www.asme.org.
*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

5.4 Hot or Cold Working:
5.4.1 The bars shall be hot wrought or cold ﬁnished as
speciﬁed by the purchaser.
5.4.2 Cold-ﬁnished bars reduced in cross-sectional area
more than 10 % by cold drawing or rolling shall be heat treated
as speciﬁed in 5.5.2.
5.5 Heat Treatment:
5.5.1 Except as provided in 5.5.2, the bars shall be furnished
as-hot wrought or as-cold ﬁnished.
5.5.2 Cold-ﬁnished bars cold worked in excess of 10 % (see
5.4.2) shall be stress relief annealed at not less than 1200 °F
(649 °C), normalized, or fully annealed. The speciﬁc heat
treatment shall be at the option of the manufacturer.
6. Chemical Composition
6.1 The heat analysis shall conform to the requirements for
chemical composition speciﬁed in Table 1.
6.2 A product analysis of the steel may be made by the
purchaser and shall conform to the requirements of Table 1
subject to the product analysis tolerances speciﬁed in Speciﬁ-
cation A29/A29M.
7. Tensile Requirements
7.1 Requirements:
7.1.1 The material, as represented by the test specimens,
shall conform to the tensile requirements speciﬁed in Table 2.
7.1.2 A deduction from the percentage of elongation speci-
ﬁed in Table 2 of 1.0 % shall be made for each 1.0 in.
(25.4 mm) of speciﬁed diameter over 2.0 in. (51 mm) or
fraction thereof to a maximum of 3 %.
7.2 Specimens:
7.2.1 Tension test specimens shall be taken longitudinally
from a position midway between the center and the surface of
the bar or as close as practical to this location for small sizes.
7.2.2 When it is impractical to remove specimens in accor-
dance with 7.2.1, they shall be taken in accordance with Test
Methods and Deﬁnitions A370.
7.3 Number of Tests—One tension test shall be made from
each lot. A lot shall consist of all bars of one size from one heat
processed at one time and subjected to the same heat treatment
when heat treated.
7.4 Test Methods—Tension tests shall be made in accor-
dance with Test Methods and Deﬁnitions A370. The yield
strength shall be determined by the 0.2 % offset or 0.5 %
extension under load methods.
8. Workmanship, Finish, and Appearance
8.1 Descaling—When descaled bars are required, Supple-
mentary Requirement S7 must be speciﬁed.
8.2 The bars shall be free of visible pipe and conditioned as
necessary to remove injurious surface imperfections.
9. General Requirements
9.1 Material furnished under this speciﬁcation shall con-
form to the applicable requirements of the current edition of
Speciﬁcation A29/A29M unless otherwise provided herein.
10. Certiﬁcation and Test Reports
10.1 A manufacturer’s certiﬁcation that the material was
manufactured and tested in accordance with this speciﬁcation
together with a report of the heat analysis and tension test
results shall be furnished at the time of shipment. The report
shall include the name of the manufacturer, ASTM designation
number and grade, shape, size, and ﬁnish.
11. Packaging and Package Marking
11.1 Bars less than 2.0 in. (51 mm) in diameter or thickness
shall be tightly banded with a sufficient number of bands of
adequate strength to minimize bundle breakage during han-
dling and shipping. Larger sizes shall be packaged in accor-
dance with Speciﬁcation A29/A29M.
11.2 For bars less than 2.0 in. (51 mm) in diameter or
thickness, each bundle shall bear a weather-resistant tag
showing the purchase order number, ASTM designation num-
ber and grade, heat number, size, and name of manufacturer.
11.3 Bars 2.0 in. (51 mm) and larger in diameter or
thickness shall have the heat number steel stamped on one end.
12. Keywords
12.1 pressure piping components; special quality steel bars;
steel bars
TABLE 1 Chemical Requirements (Heat Analysis), %
Grades B and C
Carbon, max
A
0.32
Manganese, max 1.04
Phosphorus, max 0.035
B
Sulfur, max 0.045
B
Silicon 0.15 to 0.35
Lead
B
A
For each reduction of 0.01 % below the speciﬁed carbon maximum, an increase
of 0.06 % manganese above the speciﬁed maximum will be permitted up to a
maximum of 1.35 %.
B
Phosphorus, sulfur, or lead, or a combination thereof, shall not be added.
TABLE 2 Tensile Requirements
Grade B Grade C
Tensile strength, min, ksi (MPa) 60 (415) 70 (485)
Yield strength, min, ksi (MPa) 35 (240) 40 (275)
Elongation in 2.0 in. or 50 mm, min, % 20.0 18.0
Elongation in 8.0 in. or 200 mm,
min, %
A
17.0 15.0
A
Applicable to bars 1
1
⁄
2
in. (38 mm) in diameter tested full size.
A696 − 17 (2022)
2

SUPPLEMENTARY REQUIREMENTS

One or more of the following supplementary requirements shall be applied only when speciﬁed by

the purchaser in the inquiry, contract, or order. Details of these supplementary requirements shall be

agreed upon in writing by the manufacturer and purchaser. Supplementary requirements shall in no

way negate any requirement of the speciﬁcation itself.

S1. Special Straightness

S1.1 Bars shall be within the tolerances for special straight-

ness.

S2. Stress Relief Anneal

S2.1 Bars shall be stress relief annealed (may be speciﬁed

for bars that have been ordered to special straightness toler-

ance).

S3. Surface Quality

S3.1 Bars shall be produced to special surface quality

requirements which shall be negotiated between the purchaser

and the supplier.

S4. Special Internal Soundness

S4.1 Bars shall be produced with special internal soundness

to be veriﬁed by one or more macro-etch samples. Acceptance

limits shall be negotiated between the purchaser and the seller.

S5. Fine Grain Practice

S5.1 The steel shall conform to the ﬁne austenitic grain size

requirement of Speciﬁcation A29/A29M.

S6. Restricted Size Tolerances for Hot-Wrought Bars

S6.1 Bars shall be furnished with tolerances on dimensions

more restrictive than speciﬁed in Speciﬁcation A29/A29M.

Tolerance requirements to apply shall be negotiated between

the purchaser and the manufacturer.

S7. Descaling

S7.1 Bars shall be furnished descaled and oiled.

SUMMARY OF CHANGES

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

(A696–90a(2012)) that may impact the use of this standard. (Approved Nov. 1, 2017.)

(1) Revised ﬁrst sentence of 5.1.

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/

A696 − 17 (2022)

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摘要：

ASTM A696 - 17 (2022) 是 ASTM 国际标准组织发布的最新版本标准，主要针对适用于压力服务的碳钢和合金钢无缝钢管。该标准涵盖了包括锅炉、过热器、热交换器和冷凝器在内的多种高温高压应用场景，规定了钢管的化学成分、力学性能、尺寸公差、无损检测及试验要求。此版本在2017年原版基础上进行了确认更新，确保其技术内容与当前行业实践一致。标准适用于外径不超过 5 英寸（127 mm）的圆管，并对材料牌号如 A696 Grade A、B 和 C 提供了具体规范。遵守该标准有助于确保管道在

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