ASTM A709/A709M-08

Standard Specification for Structural Steel for Bridges

ABSTRACT
This specification covers carbon and high-strength low alloy steel structural shapes, plates and bars and quenched and tempered alloy steel for structural plates intended for use in bridges. Heat analysis shall be used to determine the percentage of carbon, manganese, phosphorus, sulfur, silicon, and copper for the required chemical composition. Tension test shall be used to determine the required tensile properties such as tensile strength, yield strength, and elongation. Materials shall undergo: (1) impact test for non-fracture critical and fracture critical members; and (2) Brinell hardness test for Grades 100 and 100W. Atmospheric corrosion resistance shall also be determined.
SCOPE
1.1 This specification covers carbon and high-strength low-alloy steel structural shapes, plates, and bars and quenched and tempered alloy steel for structural plates intended for use in bridges. Nine grades are available in four yield strength levels as follows:
  Grade U.S. [SI]  Yield Strength, ksi [MPa]   36 [250]  36 [250]   50 [345]  50 [345]   50S [345S] 50 [345]   50W [345W]  50 [345]   HPS 50W [HPS 345W] 50 [345]   HPS 70W [HPS 485W] 70 [485]   100 [690] 100 [690]   100W [690W] 100 [690]   HPS 100W [HPS 690W] 100 [690]  
1.1.1 Grades 36 [250], 50 [345], 50S [345S], 50W [345W], 100 [690], and 100W [690W] are also included in Specifications A 36/A 36M, A 572/A 572M, A 992/A 992M, A 588/A 588M, A 514/A 514M, and A 514/A 514M, respectively. When the supplementary requirements of this specification are specified, they exceed the requirements of Specifications A 36/A 36M, A 572/A 572M, A 992/A 992M, A 588/A 588M, and A 514/A 514M.  
1.1.2 Grades 50W [345W], HPS 50W [HPS 345W], HPS 70W [HPS 485W], 100W [690W], and HPS 100W [HPS 690W] have enhanced atmospheric corrosion resistance (see 14.1.2). Product availability is shown in Table 1.  
1.2 Grade HPS 70W [HPS 485W], 100 [690], 100W [690W], or HPS 100W [HPS 690W] shall not be substituted for Grades 36 [250], 50 [345], 50S [345S], 50W [345W], or HPS 50W [HPS 345W]. Grade 50W [345W], or HPS 50W [HPS 345W] shall not be substituted for Grades 36 [250], 50 [345] or 50S [345S] without agreement between the purchaser and the supplier.  
1.3 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 A 6/A 6M for information on weldability.  
1.4 For structural products to be used as tension components requiring notch toughness testing, standardized requirements are provided in this standard, and they are based upon American Association of State Highway and Transportation Officials (AASHTO) requirements for both fracture critical and non-fracture critical members.
1.5 Supplementary requirements are available but shall apply only if specified in the purchase order.  
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 is to be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.7 For structural products 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 A 6/A 6M apply.
TABLE 1 Tensile and Hardness RequirementsA  
Note—Where “. . .” appears in this table, there is no requirement.   Grade
Plate Thickness,
in. [mm]
  Structural Shape Flange
or Leg
Thickness, in. [mm]
Yield Point
or Yield
Strength,B
ksi
[MPa]
Tensile
Strength,
ksi [MPa]
Minimum Elongation, %
Reduc-
tion of
AreaC,D
min, %
Brinell
Hard-
ness
Number
  Plates and BarsC,E
ShapesE
  8 in.
or 200
mm
  2 in.
...

General Information

• Status: Historical
• Publication Date: 30-Sep-2008
• ICS: 77.140.10 - Heat-treatable steels
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.02 - Structural Steel for Bridges, Buildings, Rolling Stock and Ships

Relations

• Replaces: ASTM A709/A709M-07 - Standard Specification for Structural Steel for Bridges
• Effective Date: 01-Oct-2008
• Referred By: ASTM A786/A786M-15(2021) - Standard Specification for Hot-Rolled Carbon, Low-Alloy, High-Strength Low-Alloy, and Alloy Steel Floor Plates
• Effective Date: 01-Oct-2008
• Referred By: ASTM D8507-23 - Standard Specification for High Load Multi-Rotational Disc Bearings for Bridges and Structures
• Effective Date: 01-Oct-2008
• Referred By: ASTM G101-04(2020) - Standard Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels
• Effective Date: 01-Oct-2008
• Referred By: ASTM D5977-23 - Standard Specification for High Load Rotational Spherical Bearings for Bridges and Structures
• Effective Date: 01-Oct-2008
• Referred By: ASTM A1065/A1065M-18 - Standard Specification for Cold-Formed Electric-Fusion (Arc) Welded High-Strength Low–Alloy Structural Tubing in Shapes, with 50 ksi [345 MPa] Minimum Yield Point
• Effective Date: 01-Oct-2008

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: A 709/A 709M – 08
Standard Specification for
1
Structural Steel for Bridges
This standard is issued under the fixed designationA 709/A 709M; 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* 1.4 Forstructuralproductstobeusedastensioncomponents
requiring notch toughness testing, standardized requirements
1.1 This specification covers carbon and high-strength low-
are provided in this standard, and they are based upon
alloy steel structural shapes, plates, and bars and quenched and
American Association of State Highway and Transportation
tempered alloy steel for structural plates intended for use in
Officials(AASHTO)requirementsforbothfracturecriticaland
bridges. Nine grades are available in four yield strength levels
non-fracture critical members.
as follows:
1.5 Supplementary requirements are available but shall
Grade U.S. [SI] Yield Strength, ksi [MPa]
apply only if specified in the purchase order.
36 [250] 36 [250]
1.6 The values stated in either inch-pound units or SI units
50 [345] 50 [345]
50S [345S] 50 [345] are to be regarded separately as standard. Within the text, the
50W [345W] 50 [345]
SI units are shown in brackets. The values stated in each
HPS 50W [HPS 345W] 50 [345]
system are not exact equivalents; therefore, each system is to
HPS 70W [HPS 485W] 70 [485]
100 [690] 100 [690]
be used independently of the other. Combining values from the
100W [690W] 100 [690]
two systems may result in non-conformance with the standard.
HPS 100W [HPS 690W] 100 [690]
1.7 For structural products produced from coil and fur-
1.1.1 Grades 36 [250], 50 [345], 50S [345S], 50W [345W],
nished without heat treatment or with stress relieving only, the
100 [690], and 100W [690W] are also included in Specifica-
additional requirements, including additional testing require-
tions A 36/A 36M, A 572/A 572M, A 992/A 992M, A 588/
ments and the reporting of additional test results, of Specifi-
A 588M, A 514/A 514M, and A 514/A 514M, respectively.
cation A 6/A 6M apply.
When the supplementary requirements of this specification are
2. Referenced Documents
specified, they exceed the requirements of SpecificationsA 36/
2
A 36M, A 572/A 572M, A 992/A 992M, A 588/A 588M, and
2.1 ASTM Standards:
A 514/A 514M.
A 6/A 6M Specification for General Requirements for
1.1.2 Grades 50W [345W], HPS 50W [HPS 345W], HPS
Rolled Structural Steel Bars, Plates, Shapes, and Sheet
70W [HPS 485W], 100W [690W], and HPS 100W [HPS
Piling
690W] have enhanced atmospheric corrosion resistance (see
A 36/A 36M Specification for Carbon Structural Steel
14.1.2). Product availability is shown in Table 1.
A 370 Test Methods and Definitions for MechanicalTesting
1.2 Grade HPS 70W [HPS 485W], 100 [690], 100W
of Steel Products
[690W], or HPS 100W [HPS 690W] shall not be substituted
A 514/A 514M Specification for High-Yield-Strength,
for Grades 36 [250], 50 [345], 50S [345S], 50W [345W], or
Quenched and Tempered Alloy Steel Plate, Suitable for
HPS 50W [HPS 345W]. Grade 50W [345W], or HPS 50W
Welding
[HPS 345W] shall not be substituted for Grades 36 [250], 50
A 572/A 572M Specification for High-Strength Low-Alloy
[345] or 50S [345S] without agreement between the purchaser
Columbium-Vanadium Structural Steel
and the supplier.
A 588/A 588M Specification for High-Strength Low-Alloy
1.3 When the steel is to be welded, it is presupposed that a
Structural Steel, up to 50 ksi [345 MPa] Minimum Yield
welding procedure suitable for the grade of steel and intended
Point, with Atmospheric Corrosion Resistance
use or service will be utilized. See Appendix X3 of Specifica-
A 673/A 673M Specification for Sampling Procedure for
tion A 6/A 6M for information on weldability.
Impact Testing of Structural Steel
A 992/A 992M Specification for Structural Steel Shapes
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
2
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee For referenced ASTM standards, visit the ASTM website, www.astm.org, or
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Current edition approved Oct. 1, 2008. Published October 2008. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1974. Last previous edition approved in 2007 as A 709/A 709M – 07. the ASTM website.
*ASummary 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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...

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:A 709/A 709M–07 Designation: A 709/A 709M – 08
Standard Specification for
1
Structural Steel for Bridges
This standard is issued under the fixed designationA 709/A 709M; 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 carbon and high-strength low-alloy steel structural shapes, plates, and bars and quenched and
tempered alloy steel for structural plates intended for use in bridges. Nine grades are available in four yield strength levels as
follows:
Grade U.S. [SI] Yield Strength, ksi [MPa]
36 [250] 36 [250]
50 [345] 50 [345]
50S [345S] 50 [345]
50W [345W] 50 [345]
HPS 50W [HPS 345W] 50 [345]
HPS 70W [HPS 485W] 70 [485]
100 [690] 100 [690]
100W [690W] 100 [690]
HPS 100W [HPS 690W] 100 [690]
1.1.1Grades 36 [250], 50 [345], 50S [345S], 50W [345W], 100 [690], and 100W [690W] are also included in Specifications
A36/A 36M, A 572/A 572M, A992/A 992M, A 588/A 588M, and A514/A 514M, respectively. When the supplementary
requirementsofthisspecificationarespecified,theyexceedtherequirementsofSpecificationsA36/A36M,A572/A572M,A992/A
992M, A588/A 588M, and A 514/A 514M
1.1.1 Grades 36 [250], 50 [345], 50S [345S], 50W [345W], 100 [690], and 100W [690W] are also included in Specifications
A 36/A 36M, A 572/A 572M, A 992/A 992M, A 588/A 588M, A 514/A 514M, and A 514/A 514M, respectively. When the
supplementary requirements of this specification are specified, they exceed the requirements of Specifications A 36/A 36M,
A 572/A 572M, A 992/A 992M, A 588/A 588M, and A 514/A 514M.
1.1.2 Grades 50W[345W], HPS 50W[HPS 345W], HPS 70W[HPS 485W], 100W[690W], and HPS 100W[HPS 690W] have
enhanced atmospheric corrosion resistance (see 14.1.2). Product availability is shown in Table 1.
1.2 Grade HPS 70W [HPS 485W], 100 [690], 100W [690W], or HPS 100W [HPS 690W] shall not be substituted for Grades
36 [250], 50 [345], 50S [345S], 50W [345W], or HPS 50W [HPS 345W]. Grade 50W [345W], or HPS 50W [HPS 345W] shall
not be substituted for Grades 36 [250], 50 [345] or 50S [345S] without agreement between the purchaser and the supplier.
1.3 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 A 6/A 6M/A6M for information on weldability.
1.4 For structural products to be used as tension components requiring notch toughness testing, standardized requirements are
provided in this standard, and they are based upon American Association of State Highway and Transportation Officials
(AASHTO) requirements for both fracture critical and non-fracture critical members.
1.5 Supplementary requirements are available but shall apply only if specified in the purchase order.
1.6 Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunits
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 other. Combining values from the two systems may result in any way.
non-conformance with the standard.
1.7 For structural products produced from coil and furnished without heat treatment or with stress relieving only, the additional
requirements,includingadditionaltestingrequirementsandthereportingofadditionaltestresults,ofSpecificationA 6/A 6M/A6M
apply.
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.02
on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.
Current edition approved MarchOct. 1, 2007.2008. Published March 2007.October 2008. Originally approved in 1974. Last previous edition approved in 20062007 as
A709/A709M–06a. A 709/A 709M – 07.
*ASummary 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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A 709/A 709M – 08
2. Referenced Documents
2
2.1 ASTM Standards:
A 6/A 6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
A 36/A 36M Specification for Carbon Structural Steel
A 370 Test Methods and Definitions
...