ASTM A36: Standard Specification for Carbon Structural Steel

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By Authority Of
Legally Binding Document
By the Authority Vested By Part 5 of the United States Code § 552(a) and Part 1 of the Code of Regulations § 51 the attached document has been duly INCORPORATED BY REFERENCE and shall be considered legally binding upon all citizens and residents of the United States of America. HEED THIS NOTICE: Criminal penalties may apply for noncompliance.

Document Name:

ASTM A36: Standard Specification for Carbon Structural Steel

CFR Section(s): 46 CFR 160.035-3(b)(2)

Standards Body: American Society for Testing and Materials

Official Incorporator:

~~l~ Designation: A 36/A 36M - 97aE1

Standard Specification for Carbon Structural Steel1
This .st~ndard is ~ssued ~nder the fixed designation A 36/A 36M; the number immediately following the designation indicates the year of orIgInal.adopt1?n or, In. th~ 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 This standard has been approved for use by agencies of the Department of Defense.
el NOTE-Table 2 was editorially corrected in September 1999.

1. Scope

1.1 This specification2 covers carbon steel shapes, plates,

and bars of structural quality for use in riveted, bolted, or

welded construction of bridges and buildings, and for general

structural purposes.

1.2 Supplementary requirements are provided for use where

additional testing or additional restrictions are required by the

purchaser. Such requirements apply only when specified in the

purchase order.


1.3 When the steel is to be welded, a welding procedure

suitable for the grade of steel and intended use or service is to

be utilized. See Appendix X3 of Specification A 6/A 6M for

information on weldability.

1.4 For Group 4 and 5 wide flange shapes for use in tension,

it is recommended that the purchaser consider specifying supplementary requirements, such as fine austenitic grain size

and Charpy V-Notch Impact testing.

1.5 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 is to

be used independently of the other, without combining values

in any way.

1.6 The text of this specification contains notes orfootnotes,

or both, that provide explanatory material. Such notes and

footnotes, excluding those in tables and figures, do not contain

any mandatory requirements.

1.7 For plates cut from coiled product, the additional

requirements, including additional testing requirements and the

reporting of additional test results, of A 6/A 6M apply.

2. Referenced Documents
2.1 ASTM Standards: A 6/A 6M Specification for General Requirements for

Rolled Structural Steel Bars, Plates, Shapes, and Sheet



A 27/A 27M Specification for Steel Castings, Carbon, for General Application4

A 307 Specification for Carbon Steel Bolts and' Studs, 60 000 psi Tensile Strength5

A 325 Specification for Structural Bolts, Steel, Heat Treated, 1201105 ksi Minimum Tensile Strength5

A 325M Specification for High-Strength Bolts for Struc-

tural Steel Joints [Metric]5

A 500 Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes6

A 501 Specification for Hot-Formed Welded and Seamless

Carbon Steel Structural Tubing6



A 502 Specification for Steel Structural Rivets5 A 563 Specification for Carbon and Alloy Steel Nuts5

A 563M Specification for Carbon and Alloy Steel Nuts

[Metric] 5


A 570/A 570M Specification for Steel, Sheet and Strip,

Carbon, Hot-Rolled, Structural Quality7.

A 668 Specification for Steel Forgings, Carbon and Alloy,

for General Industrial Uses

F 568M Specification for Carbon and Alloy Steel Externally Threaded Metric Fasteners5

3. Appurtenant Materials
3.1 When components of a steel structure are identified with this ASTM designation but the product form is not listed in the scope of this specification, the material shall conform to one of the s,tandards listed in Table 1 unless otherwise specified by the purchaser.

4. General Requirements for Delivery
A.l Material furnished under this specification shall conform to the requirements of the cunent edition of Specification A 6/A 6M, for the ordered material, unless a conflict exists in

I This specification is under the jurisdiction of ASTM Connnittee A-Ion 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 Nov. 10, 1997. Published April 1998. Originally published as A 36 - 60 T. Last previous edition A 36/A 36M - 97.
2 For ASME Boiler and Pressure Vessel Code Applications, see related Specifications SA-36 in Section II of that Code.

3 Annual Book of ASTM Standards, Vol 01.04. 4 Annual Book of ASTM Standards, Vol 01.02. 5 Annual Book of ASTM Standards, Vol 15.08. 6 Annual Book of ASTM Standards, Vol 01.01. 7 Annual Book of ASTM Standards, Vol 01.03. 8 Annual Book of ASTM Standards, Vol 01.05.

Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428·2959, United States.

~~f~ A 361A 36M

TABLE 1 Appurtenant Material Specifications
NOTE I-The specifier should be satisfied of the suitability of these materials for the intended application. Composition and/or mechanical properties may be different than specified in A 36/A 36M.

Steel rivets Bolts High-strength bolts Steel nuts Cast steel Forgings (carbon steel) Hot-rolled sheets and strip Cold-formed tubing Hot-formed tubing Anchor bolts

ASTM Designation
A 502, Grade 1 A 307, Grade A or F 568M, Class 4.6 A 325 or A 325M A 563 or A 563M A 27/A 27M, Grade 65-35 [450-240] A 668, Class D A 570/A 570M, Grade 36 A 500, Grade B A501 F 1554

which case this specification shall prevail.

4.1.1 Coiled product is excluded from qualification to this

specification until levelled and cut to length. Plates produced

from coil means plates that have been cut to individual lengths

from a coiled product and are furnished without heat treatment.

The processor decoils, levels, cuts to length and marks the

product. The processor is responsible for performing and

certifying all tests, examinations, repairs, inspections or opera-

tions not intended to affect the properties of the material. For

plates produced from coils, two test results shall be reported for

each qualifying coil. See Note 1.


NOTE I-Additional requirements regarding plate from coil are described in Specification A 6/A 6M.

5. Bearing Plates
5.1 Unless otherwise specified, plates used as bearing plates for bridges shall be subjected to mechanical tests and shall

conform to the tensile requirements of Section 8. 5.2 Unless otherwise specified, mechanical tests shall not be
required for plates over 11/2 in. [40 IIlI)1] in thickness used as bearing plates ill structures other than bridges, subject to the requirement that they shall co:n.tain 0.20 to 0.33 % carbon by heat analysis, that the chemical composition shall conform to the requirements of Table 2 in phosphorus and sulfur content, and· that a sufficient discard shall be made to secure sound plates.
6. Process
6.1 The steel shall be made by one or more of the following processes: open-hearth, basic-oxygen, or electric-furnace.
6.2 No rimmed or capped steel shall be used for plates and bars over V2 in. [12.5 mm] thick or for shapes other than Group 1.
7. Chemical Requirements
7.1 The heat analysis shall conform to the requirements prescribed in Table 2, except as specified in 5.2.
7.2 The' steel shall conform on product analysis to the requirements prescribed in Table 2, subject to the product analysis tol~rances in Specification A 6/A 6M.
8. Tensile Requirem:ents
8.1 The material as represented by the test specimen, except as specified in 5.2 and 8.2, shall conforinto the requirements as to the tensile properties prescribed in Table 3.
8.2 Shapes less than 1 in?[645 mm 2] in cross section and bars, other than fiats, less than V2 in. [12.5 mm] in thickness or diameter need not be subjected to tension tests by the manufacturer, provided that the chemical composition used is appropriate for obtaining the tensile properties in Table 3.

TABLE 2 Chemical Requirements

NOTE 1- Where "..." appears in this table there is no requirement. The heat analysis for manganese shall be determined and reported as described in the heat analysis section of Specification A 6/A 6M.





Thickness, in. [mm]

Over %

Over 1'12 Over 2'12

Over %

Over 1V2


to 1'12

to 2 '12

to 4

Over 4


to 1'12

to 4

Over 4


[20], [20 to 40], [40 to 65], [65 to 100], [100]


[20 to 40],



incl incl






Carbon, max, % Manganese, % Phosphorus, max, % Sulfur, max, % Silicon, % Copper, min, % when cop-
per steel is specified

0.04 0.05 0.40 max 0.20

0.04 0.05 0.40 ,max 0.20

0.25 0.80-1.20 0.04 0.05 0.40 max 0.20

0.26 0.80-1.20 0.04 0.05 0.15-0.40 0.20

0.27 0.85-1.20 0.04 0.05 0.15-0.40 0.20

0.29 0.85-1.20 0.04 0.05 0.15-0.40 0.20

.. .
0.04 0.05 0.40 max 0.20

0.27 0.60-0.90 0.04 0.05 0.40 max 0.20

0.28 0.60-0.90 0.04 0.05 0.40 max 0.20

0.29 0.60-0.90 0.04 0.05 0.40 max 0.20

A Mangahese content of 0.85-1.35 % and silicon content of 0.15-0.40 % is required for shapes over 426 Ib/tt [634 kg/m]. B F.or 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 the maximum of 1.35 %.


TABLE 3 Tensile RequirementsA

~~l~ A 36/A 36M

Plates, Shapes,B and Bars: Tensile strength, ksi [MPa] Yield point, min, ksi [MPa]
Plates and Bars o. E: Elongation in 8 in. [200 mm], min, %
Elongation in 2 in. [50 mm], min, % Shapes:
Elongation in 8 in. [200 mm]; min; % Elongation in 2 in. [50 mm], min, % '

58-80 [400-550] 36 [250]c
20 23

A See Specimen Orientation under the Tension Tests section of Specification, A6/A 6M.
B For wide flange shapes over 426 Ibltt [634 kgfm], the 80 ks! [550 MPa] maximum tensile strength does not apply and a minimum elongation in 2 in. [50 mm] of 19 %, applies.
c Yield point 32 ksi [220 MPa] for plates over 8 in. [200 mm] in thickness. o Elongation not required to be determined for floor plate. E For plates wider than 24 in. [600 mm], the elongation requirement is reduced two percentage points. See elongation requirement adjustments under the Tellsion Tests section of Specification A 6fA 6M.

9. Keywords
9.1 bars; bolted construction; bridges; buiidings; carbon; plates; riveted construction; shapes; steel; structural steel; welded construction

These requirements shall not apply unless specified in the order. Standardized supplementary requirements for use at the option of the purchaser' are listed in Specification A 6/A 6M. Those that are considered suitable for use with this specification are listed by title:
S5. Charpy V-Notch Impact Test.
S14. Bend Test.


tn addition, the following optional suppl~mentary requirements are also suitable for use with this



1_ !

S9~. Fine A1.).stenitic Grain Size

S97. Limitation on Rimmed or Capped Steel

, S91.1 Theste~l shall qekilled and have a fine austenitic: grain size.

S97.1 The steel shall be other than rimmed or capped.

The American Society for Testing and Materials 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 r~viewed evelJl 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 Headquarters. Your comments will receive careful consideration at a meeting of the responsible 'technical committee,which you may atlend. If youteel that your comments have not received a fair hearing you should make your' vieWs known to the ASTM Committee on Standards, 100 Barr Harbor Drive, West Conshohocken, PA 19428.
This standard is copyrighted by ASTM, 100 Barr Harbor Drive, 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 [email protected] (e-mail); or through the ASTM website (


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ASTM A36: Standard Specification for Carbon Structural Steel