ASTM A709/A709M-09

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. Seven 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]   HPS 100W [HPS 690W] 100 [690]  
1.1.1 Grades 36 [250], 50 [345], 50S [345S], and 50W [345W] are also included in Specifications A 36/A 36M, A 572/A 572M, A 992/A 992M, and A 588/A 588M, 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, and A 588/A 588M.  
1.1.2 Grades 50W [345W], HPS 50W [HPS 345W], HPS 70W [HPS 485W], and HPS 100W [HPS 690W] have enhanced atmospheric corrosion resistance (see 13.1.2). Product availability is shown in Table 1.  
1.2 Grade HPS 70W [HPS 485W] 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 SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall 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, %
  Plates and BarsC,E
ShapesE
  8 in.
or 200
mm
  2 in.
or 50
mm
8 in.
or 200
mm
2 in.
or 50
mm
   36 [250]
  to 4 [100], incl
  to 3 in. [75 mm], incl
  36 [250] min
  58–80 [400–550]
  20
  23
  20
  21
  ...
   over 3 in. [75 mm]
  36 [250] min
  58 [400...

General Information

• Status: Historical
• Publication Date: 31-Mar-2009
• 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

• Replaced By: ASTM A709/A709M-09a - Standard Specification for Structural Steel for Bridges
• Effective Date: 01-Oct-2009

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation: A709/A709M – 09
Standard Specification for
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Structural Steel for Bridges
This standard is issued under the fixed designationA709/A709M; 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 (ϵ) indicates an editorial change since the last revision or reapproval.
1. Scope* Officials(AASHTO)requirementsforbothfracturecriticaland
non-fracture critical members.
1.1 This specification covers carbon and high-strength low-
1.5 Supplementary requirements are available but shall
alloy steel structural shapes, plates, and bars and quenched and
apply only if specified in the purchase order.
tempered alloy steel for structural plates intended for use in
1.6 The values stated in either SI units or inch-pound units
bridges. Seven grades are available in four yield strength levels
are to be regarded separately as standard. The values stated in
as follows:
each system may not be exact equivalents; therefore, each
Grade U.S. [SI] Yield Strength, ksi [MPa]
system shall be used independently of the other. Combining
36 [250] 36 [250]
values from the two systems may result in non-conformance
50 [345] 50 [345]
50S [345S] 50 [345] with the standard.
50W [345W] 50 [345]
1.7 For structural products produced from coil and fur-
HPS 50W [HPS 345W] 50 [345]
nished without heat treatment or with stress relieving only, the
HPS 70W [HPS 485W] 70 [485]
HPS 100W [HPS 690W] 100 [690]
additional requirements, including additional testing require-
ments and the reporting of additional test results, of Specifi-
1.1.1 Grades 36 [250], 50 [345], 50S [345S], and 50W
cation A6/A6M apply.
[345W] are also included in Specifications A36/A36M, A572/
A572M,A992/A992M, andA588/A588M, respectively. When
2. Referenced Documents
the supplementary requirements of this specification are speci-
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2.1 ASTM Standards:
fied, they exceed the requirements of Specifications A36/
A6/A6M SpecificationforGeneralRequirementsforRolled
A36M, A572/A572M, A992/A992M, and A588/A588M.
Structural Steel Bars, Plates, Shapes, and Sheet Piling
1.1.2 Grades 50W [345W], HPS 50W [HPS 345W], HPS
A36/A36M Specification for Carbon Structural Steel
70W [HPS 485W], and HPS 100W [HPS 690W] have en-
A370 Test Methods and Definitions for Mechanical Testing
hanced atmospheric corrosion resistance (see 13.1.2). Product
of Steel Products
availability is shown in Table 1.
A572/A572M Specification for High-Strength Low-Alloy
1.2 Grade HPS 70W [HPS 485W] or HPS 100W [HPS
Columbium-Vanadium Structural Steel
690W] shall not be substituted for Grades 36 [250], 50 [345],
A588/A588M Specification for High-Strength Low-Alloy
50S [345S], 50W [345W], or HPS 50W [HPS 345W]. Grade
Structural Steel, up to 50 ksi [345 MPa] Minimum Yield
50W [345W], or HPS 50W [HPS 345W] shall not be substi-
Point, with Atmospheric Corrosion Resistance
tuted for Grades 36 [250], 50 [345] or 50S [345S] without
A673/A673M Specification for Sampling Procedure for
agreement between the purchaser and the supplier.
Impact Testing of Structural Steel
1.3 When the steel is to be welded, it is presupposed that a
A992/A992M Specification for Structural Steel Shapes
welding procedure suitable for the grade of steel and intended
G101 Guide for Estimating the Atmospheric Corrosion
use or service will be utilized. See Appendix X3 of Specifica-
Resistance of Low-Alloy Steels
tion A6/A6M for information on weldability.
1.4 Forstructuralproductstobeusedastensioncomponents
3. Terminology
requiring notch toughness testing, standardized requirements
3.1 Definitions of Terms Specific to This Standard:
are provided in this standard, and they are based upon
3.1.1 fracture critical member—a main load-carrying ten-
American Association of State Highway and Transportation
sion member or tension component of a bending member
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
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A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2009. Published April 2009. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1974. Last previous edition approved in 2008 as A709/A709M – 08. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/A0709_A0709M-09. 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.
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