ASTM A913/A913M-15

Standard Specification for High-Strength Low-Alloy Steel Shapes of Structural Quality, Produced by Quenching and Self-Tempering Process (QST)

ABSTRACT
This guide covers high-strength low-alloy steel shapes of structural quality, produced by quenching and self-tempering process (QST). The chemical analysis of the heat and of the steel product analysis shall conform to the chemical requirements prescribed by the reference materials. The Charpy V-notch test shall be performed to determine if the material conforms to the required tensile properties.
SCOPE
1.1 This specification covers high-strength low-alloy structural steel shapes in Grades 50 [345], 60 [415], 65 [450] and 70 [485], produced by the quenching and self-tempering process (QST). The shapes are intended for riveted, bolted or welded construction of bridges, buildings and other structures.  
1.2 The QST process consists of in line heat treatment and cooling rate controls which result in mechanical properties in the finished condition that are equivalent to those attained using heat treating processes which entail reheating after rolling. A description of the QST process is given in Appendix X1.  
1.3 Due to the inherent characteristics of the QST process, the shapes shall not be formed and post weld heat treated at temperatures exceeding 1100°F [600°C].  
1.4 When the 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 Specification A6/A6M for information on weldability.  
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 must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification.

General Information

• Status: Historical
• Publication Date: 30-Jun-2015
• ICS: 77.140.70 - Steel profiles
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.02 - Structural Steel for Bridges, Buildings, Rolling Stock and Ships

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A913/A913M −15
Standard Specification for
High-Strength Low-Alloy Steel Shapes of Structural Quality,
1
Produced by Quenching and Self-Tempering Process (QST)
This standard is issued under the fixed designationA913/A913M; 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* A673/A673M Specification for Sampling Procedure for Im-
pact Testing of Structural Steel
1.1 This specification covers high-strength low-alloy struc-
A898/A898M Specification for Straight Beam Ultrasonic
turalsteelshapesinGrades50[345],60[415],65[450]and70
Examination of Rolled Steel Structural Shapes
[485], produced by the quenching and self-tempering process
(QST). The shapes are intended for riveted, bolted or welded
3. General Requirements for Delivery
construction of bridges, buildings and other structures.
3.1 Material furnished under this specification shall con-
1.2 The QST process consists of in line heat treatment and
form to the applicable requirements of the current edition of
cooling rate controls which result in mechanical properties in
Specification A6/A6M.
the finished condition that are equivalent to those attained
using heat treating processes which entail reheating after
4. Materials and Manufacture
rolling.Adescription of the QST process is given in Appendix
4.1 The shapes shall be produced by the quenching and
X1.
self-tempering process (QST). Following rapid quenching to
1.3 Due to the inherent characteristics of the QST process,
achieve a surface temperature below the martensite start
the shapes shall not be formed and post weld heat treated at
temperature, Ms, the shapes shall be allowed to auto-temper to
temperatures exceeding 1100°F [600°C].
a self-tempering temperature (STT) that shall be 1100°F
1.4 When the steel is to be welded, it is presupposed that a
[595°C] minimum and 1300°F [705°C] maximum. The STT
welding procedure suitable for the grade of steel and intended shall be reported on the mill test report.
use or service will be utilized. See Appendix X3 of Specifica-
4.2 For grades 60 [415], 65 [450], and 70 [485], the
tion A6/A6M for information on weldability.
requirements for fine austenitic grain size in Specification
1.5 The values stated in either inch-pound units or SI units A6/A6M shall be met.
are to be regarded separately as standard. Within the text, the
5. Chemical Composition
SI units are shown in brackets. The values stated in each
system are not exact equivalents; therefore, each system must
5.1 The chemical analysis of the heat shall conform to the
be used independently of the other. Combining values from the
requirements prescribed in Table 1.
two systems may result in nonconformance with this specifi-
5.2 The steel shall conform on product analysis to the
cation.
requirements prescribed in Table 1 subject to the product
analysis tolerances in Specification A6/A6M.
2. Referenced Documents
2
2.1 ASTM Standards:
6. Mechanical Properties
A6/A6M Specification for General Requirements for Rolled
6.1 Tensile Properties—The material as represented by the
Structural Steel Bars, Plates, Shapes, and Sheet Piling
test specimens shall conform to the tensile properties given in
Table 2.
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
6.2 Charpy V-notch tests shall be made in accordance with
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
Specification A673/A673M, Frequency H:
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.
6.2.1 The test results of full-size specimens shall meet an
Current edition approved July 1, 2015. Published August 2015. Originally
average value of 40 ft-lbf [54 J] at 70°F [21°C].
approved in 1993. Last previous edition approved in 2014 as A913/A913M – 14a.
DOI: 10.1520/A0913_A0913M-15.
6.2.1.1 Test reports for every heat supplied are required.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.2.2 Charpy V-notch test requirements exceeding the value
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
specified in 6.2.1 or lower test temperatures are subject to
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. agreement between the purchaser and the producer.
*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
1

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A913/A913M−15
TABLE 1 Chemical Requirements (Heat Analysis) TABLE 2 Tensile Requirements
Y
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A913/A913M − 14a A913/A913M − 15
Standard Specification for
High-Strength Low-Alloy Steel Shapes of Structural Quality,
1
Produced by Quenching and Self-Tempering Process (QST)
This standard is issued under the fixed designation A913/A913M; 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 high-strength low-alloy structural steel shapes in Grades 50 [345], 60 [415], 65 [450] and 70 [485],
produced by the quenching and self-tempering process (QST). The shapes are intended for riveted, bolted or welded construction
of bridges, buildings and other structures.
1.2 The QST process consists of in line heat treatment and cooling rate controls which result in mechanical properties in the
finished condition that are equivalent to those attained using heat treating processes which entail reheating after rolling. A
description of the QST process is given in Appendix X1.
1.3 Due to the inherent characteristics of the QST process, the shapes shall not be formed and post weld heat treated at
temperatures exceeding 1100°F [600°C].
1.4 When the 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 Specification A6/A6M for information on weldability.
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 must be used
independently of the other. Combining values from the two systems may result in nonconformance with this specification.
2. Referenced Documents
2
2.1 ASTM Standards:
A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
A673/A673M Specification for Sampling Procedure for Impact Testing of Structural Steel
A898/A898M Specification for Straight Beam Ultrasonic Examination of Rolled Steel Structural Shapes
3. General Requirements for Delivery
3.1 Material furnished under this specification shall conform to the applicable requirements of the current edition of
Specification A6/A6M.
4. Materials and Manufacture
4.1 The shapes shall be produced by the quenching and self-tempering process (QST). Self-tempering temperature shall be a
minimum of 1100°F [600°C] and the self-tempering temperature for the material represented shall be Following rapid quenching
to achieve a surface temperature below the martensite start temperature, Ms, the shapes shall be allowed to auto-temper to a
self-tempering temperature (STT) that shall be 1100°F [595°C] minimum and 1300°F [705°C] maximum. The STT shall be
reported on the mill test report. See Appendix X1 for Process Description.
4.2 For grades 60 [415], 65 [450], and 70 [485], the requirements for fine austenitic grain size in Specification A6/A6M shall
be met.
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 May 15, 2014July 1, 2015. Published May 2014August 2015. Originally approved in 1993. Last previous edition approved in 2014 as
A913/A913M – 14.A913/A913M – 14a. DOI: 10.1520/A0913_A0913M-14A.10.1520/A0913_A0913M-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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
1

---------------------- Page: 1 ----------------------
A913/A913M − 15
5. Chemical Composition
5.1 The chemical analysis of the heat shall conform to the requirements prescribed in Table 1.
5.2 The steel shall conform on product analysis to the requirements prescribed in Table 1 subject to the product analysis
tolerances in Specification A6/A6M.
6. Mechanical Properties
6.1 Tensile Properties—The material as represented by the test specimens shall conform to the te
...