ASTM A913/A913M-00a

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

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 1100oF [600oC].
1.4 This specification covers structural shapes Groups 1 to 5 shown in Table A of specification A6/A6M.
1.5 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.
1.6 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: 09-Sep-2001
• 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

Relations

• Replaced By: ASTM A913/A913M-01 - Standard Specification for High-Strength Low-Alloy Steel Shapes of Structural Quality, Produced by Quenching and Self-Tempering Process (QST)
• Effective Date: 10-Sep-2001
• Referred By: ASTM C1802-23 - Standard Specification for Design, Testing, Manufacture, Selection, and Installation of Horizontal Fabricated Metal Access Hatches for Utility, Water, and Wastewater Structures
• Effective Date: 10-Sep-2001
• Referred By: ASTM A709/A709M-21 - Standard Specification for Structural Steel for Bridges
• Effective Date: 10-Sep-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A 913/A913M – 00a
Standard Specification for
High-Strength Low-Alloy Steel Shapes of Structural Quality,
Produced by Quenching and Self-Tempering Process (QST)
This standard is issued under the fixed designation A 913/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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope A 6/A6M Specification for General Requirements for
Rolled Structural Steel Bars, Plates, Shapes, and Sheet
1.1 This specification covers high-strength low-alloy struc-
Piling
tural steel shapes in Grades 50 [345], 60 [415], 65 [450] and 70
A 673/A673M Specification for Sampling Procedure for
[485], produced by the quenching and self-tempering process
Impact Testing of Structural Steel
(QST). The shapes are intended for riveted, bolted or welded
A 898/A898M Specification for Straight Beam Ultrasonic
construction of bridges, buildings and other structures.
Examination of Rolled Steel Structural Shapes
1.2 The QST process consists of in line heat treatment and
cooling rate controls which result in mechanical properties in
3. General Requirements for Delivery—
the finished condition that are equivalent to those attained
3.1 Material furnished under this specification shall con-
using heat treating processes which entail reheating after
form to the applicable requirements of the current edition of
rolling. A description of the QST process is given in Appendix
Specification A 6/A 6M.
X1.
1.3 Due to the inherent characteristics of the QST process,
4. Materials and Manufacture
the shapes shall not be formed and post weld heat treated at
4.1 The shapes shall be produced by the quenching and
temperatures exceeding 1100°F [600°C].
self-tempering process (QST). Self-tempering temperature
1.4 This specification covers structural shapes Groups 1 to 5
shall be a minimum of 1100°F [600°C] and the self-tempering
shown in Table A of specification A 6/A 6M.
temperature for the material represented shall be reported on
1.5 When the steel is to be welded, it is presupposed that a
the mill test report. See appendix for Process Description.
welding procedure suitable for the grade of steel and intended
4.2 For grades 60 [415], 65 [450], and 70 [485], the
use or service will be utilized. See Appendix X3 of Specifica-
requirements for fine austenitic grain size in Specification A
tion A 6/A 6M for information on weldability.
6/A 6M shall be met.
1.6 The values stated in either inch-pound units or SI units
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
5.1 The chemical analysis of the heat shall conform to the
system are not exact equivalents; therefore, each system must
requirements prescribed in Table 1.
be used independently of the other. Combining values from the
5.2 The steel shall conform on product analysis to the
two systems may result in nonconformance with this specifi-
requirements prescribed in Table 1 subject to the product
cation.
analysis tolerances in Specification A 6/A 6M.
2. Referenced Documents
6. Mechanical Properties
2.1 ASTM Standards:
6.1 Tensile Properties—The material as represented by the
test specimens shall conform to the tensile properties given in
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Table 2.
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
6.2 Charpy V-notch tests shall be made in accordance with
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock, and Ships.
Current edition approved Sept. 10, 2000. Published October 2000. Originally
Specification A 673/A 673M, Frequency H:
published as A 913/A 913M – 93. Last previous edition A 913/A 913M – 00.
6.2.1 The test results of full-size specimens shall meet an
The quenching and self-tempering process (QST) and the used apparatus are
average value of 40 ft-lbf [54 J] at 70°F [21°C].
covered by patents held by the Centre de Recherches Métallurgiques (CRM)—Rue
Ernest Solvay, 11, B 4000, Liège (Belgium). Interested parties are invited to submit 6.2.2 Charpy V-notch test requirements exceeding the value
information regarding the identification of acceptable alternatives to these patented
specified in 6.2.1 or lower test temperatures are subject to
items to the Committee on Standards, ASTM Headquarters, 100 Barr Harbor Drive,
West Conshohocken, PA 19428–2959. Comments will receive careful consideration
at the meeting of the responsible technical committee, which any interested party
may attend. Annual Book of ASTM Standards, Vol 01.04.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
A 913/A913M
TABLE 1 Chemical Requirements (Heat Analysis)
7. Maximum Carbon Equivalent Requirement
7.1 The carbon equivalent on heat analysis shall not exceed
Maximum content in %
the limits listed in this section. The chemical analysis (heat
Element
Grade 50 Grade 60 Grade 65 Grade 70
analysis) of the elements that appear in the carbon equivalent
[345] [415] [450] [485]
formula and the actual carbon equivalent shall be reported.
Carbon 0.12 0.14 0.16 0.16
Manganese 1.60 1.60 1.60 1.60
Phosphorus 0.040 0.030 0.030 0.040
Carbon equivalent limits
Sulfur 0.030 0.030 0.030 0.030
Grade 50 [345]: 0.38 %
Silicon 0.40 0.40 0.40 0.40
Grade 60 [415]: 0.40 %
Copper 0.45 0.35 0.35 0.45
Grade 65 [450]: 0.43 %
Nickel 0.25 0.25 0.25 0.25
Grade 70 [485]: 0.45 %
Chromium 0.25 0.25 0.25 0.25
Molybdenum 0.07 0.07 0.07 0.07
Columbium 0.05 0.04 0.05 0.05
7.2 Calculate the carbon equivalent using the following
Vanadium 0.06 0.06 0.06 0.09
equation:
CE = C + Mn/6 + (Cr + Mo + V)/5 + (Cu + Ni)/15
TABLE 2 Tensile Requirements
8. Keywords
Yield Point, Tensile
Elongation, min
min. Strength, min.
8.1 high-strength low-alloy steel; QST; quenching and self-
Grade
8 in. 2 in. tempering process; steel shapes; structural shapes; structural
ksi [MPa] ksi [MPa]
[200 mm], % [50 mm], %
steel
50 [345] 50 [345] 65 [
...