ASTM A709/A709M-17e1
(Specification)Standard Specification for Structural Steel for Bridges
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. A tension test shall be used to determine the required tensile properties such as tensile strength, yield strength, and elongation. Materials shall undergo: (1) an impact test for non-fracture critical and fracture critical members; and (2) a 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, quenched and tempered alloy steel, and stainless steel for structural plates intended for use in bridges. Eight 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]
50CR [345CR]
50 [345]
HPS 70W [HPS 485W]
70 [485]
HPS 100W [HPS 690W]
100 [690]
1.1.1 Grades 36 [250], 50 [345], 50S [345S], 50W [345W], and 50CR [345CR] are also included in Specifications A36/A36M, A572/A572M, A992/A992M, A588/A588M, and A1010/A1010M (UNS S41003), respectively. When the requirements of Table 10 or Table 11 or the supplementary requirements of this specification are specified, they exceed the requirements of Specifications A36/A36M, A572/A572M, A992/A992M, A588/A588M, and A1010/A1010M (UNS S41003). Product availability is shown in Table 1. (A) See specimen orientation and preparation subsection in the Tension Tests section of Specification A6/A6M.(B) Measured at 0.2 % offset or 0.5 % extension under load as described in Section 13 of Test Methods A370.(C) Elongation and reduction of area not required to be determined for floor plates.(D) For plates wider than 24 in. [600 mm], the reduction of area requirement, where applicable, is reduced by five percentage points.(E) For plates wider than 24 in. [600 mm], the elongation requirement is reduced by two percentage points. See elongation requirement adjustments in the Tension Tests section of Specification A6/A6M.(F) Elongation in 2 in. or 50 mm: 19 % for shapes with flange thickness over 3 in. [75 mm].(G) Not applicable.(H) The yield to tensile ratio shall be 0.87 or less for shapes that are tested from the web location; for all other shapes, the requirement is 0.85.(I) A maximum yield strength of 70 ksi [480 MPa] is permitted for structural shapes that are required to be tested from the web location.(J) For wide flange shapes with flange thickness over 3 in. [75 mm], elongation in 2 in. or 50 mm of 18 % minimum applies.(K) If measured on the Fig. 3 (Test Methods A370) 11/2-in. [40–mm] wide specimen, the elongation is determined in a 2-in. or 50-mm gage length that includes the fracture and shows the greatest elongation.(L) 40 % minimum applies if measured on the Fig 3 (Test Methods A370) 11/2-in. [40-mm] wide specimen; 50 % minimum applies if measured on the Fig. 4 (Test Methods A370) 1/2-in. [12.5-mm] round specimen.(M) Not applicable to Fracture Critical Tension Components (see Table 11).
1.1.2 Grades 50W [345W], 50CR [345CR], 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. (A) Manganese content of 0.85 to 1.35 % and silicon content of 0.15 to 0.40 % is required for shapes with flange thickness over 3 in. [75 mm].(B) For 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 a maximum of 1.35 %. (A) Copper when spec...
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´1
Designation:A709/A709M −17
Standard Specification for
1
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 (´) indicates an editorial change since the last revision or reapproval.
1
ε NOTE—Table 3 was corrected editorially in June 2018.
1. Scope* use or service will be utilized. See Appendix X3 of Specifica-
tion A6/A6M for information on weldability.
1.1 This specification covers carbon and high-strength low-
alloy steel structural shapes, plates, and bars, quenched and 1.4 Forstructuralproductstobeusedastensioncomponents
tempered alloy steel, and stainless steel for structural plates requiring notch toughness testing, standardized requirements
intended for use in bridges. Eight grades are available in four are provided in this standard, and they are based upon
yield strength levels as follows: American Association of State Highway and Transportation
Officials(AASHTO)requirementsforbothfracturecriticaland
Grade U.S. [SI] Yield Strength, ksi [MPa]
36 [250] 36 [250]
non-fracture critical members.
50 [345] 50 [345]
1.5 Supplementary requirements are available but shall
50S [345S] 50 [345]
50W [345W] 50 [345]
apply only if specified in the purchase order.
HPS 50W [HPS 345W] 50 [345]
50CR [345CR] 50 [345]
1.6 The values stated in either SI units or inch-pound units
HPS 70W [HPS 485W] 70 [485]
are to be regarded separately as standard. The values stated in
HPS 100W [HPS 690W] 100 [690]
each system may not be exact equivalents; therefore, each
1.1.1 Grades 36 [250], 50 [345], 50S [345S], 50W [345W],
system shall be used independently of the other. Combining
and 50CR [345CR] are also included in Specifications A36/
values from the two systems may result in non-conformance
A36M, A572/A572M, A992/A992M, A588/A588M, and
with the standard.
A1010/A1010M (UNS S41003), respectively. When the re-
1.7 For structural products produced from coil and fur-
quirements of Table 10 or Table 11 or the supplementary
nished without heat treatment or with stress relieving only, the
requirements of this specification are specified, they exceed the
additional requirements, including additional testing require-
requirements of Specifications A36/A36M, A572/A572M,
ments and the reporting of additional test results, of Specifi-
A992/A992M, A588/A588M, and A1010/A1010M (UNS
cation A6/A6M apply.
S41003). Product availability is shown in Table 1.
1.1.2 Grades50W[345W],50CR[345CR],HPS50W[HPS 1.8 This international standard was developed in accor-
dance with internationally recognized principles on standard-
345W], HPS 70W [HPS 485W], and HPS 100W [HPS 690W]
have enhanced atmospheric corrosion resistance (see 13.1.2). ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
Product availability is shown in Table 1.
mendations issued by the World Trade Organization Technical
1.2 Grade HPS 70W [HPS 485W] or HPS 100W [HPS
Barriers to Trade (TBT) Committee.
690W] shall not be substituted for Grades 36 [250], 50 [345],
50S [345S], 50W [345W], or HPS 50W [HPS 345W]. Grade
2. Referenced Documents
50W [345W], or HPS 50W [HPS 345W] shall not be substi-
2
tuted for Grades 36 [250], 50 [345] or 50S [345S] without 2.1 ASTM Standards:
A6/A6M Specification for General Requirements for Rolled
agreement between the purchaser and the supplier.
Structural Steel Bars, Plates, Shapes, and Sheet Piling
1.3 When the steel is to be welded, it is presupposed that a
A36/A36M Specification for Carbon Structural Steel
welding procedure suitable for the grade of steel and intended
A370 Test Methods and Definitions for Mechanical Testing
of Steel Products
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
2
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 Sept. 1, 2017. Published September 2017. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1974. Last previous edition approved in 2016 as A709/A709M – 16a. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/A0709_A0709M-17E01. 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
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A709/A709M−17
A
TABLE 1 Tensile and Hardness
...
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.
´1
Designation: A709/A709M − 17 A709/A709M − 17
Standard Specification for
1
Structural Steel for Bridges
This standard is issued under the fixed designation A709/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 (´) indicates an editorial change since the last revision or reapproval.
1
ε NOTE—Table 3 was corrected editorially in June 2018.
1. Scope*
1.1 This specification covers carbon and high-strength low-alloy steel structural shapes, plates, and bars, quenched and
tempered alloy steel, and stainless steel for structural plates intended for use in bridges. Eight 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]
50CR [345CR] 50 [345]
HPS 70W [HPS 485W] 70 [485]
HPS 100W [HPS 690W] 100 [690]
1.1.1 Grades 36 [250], 50 [345], 50S [345S], 50W [345W], and 50CR [345CR] are also included in Specifications A36/A36M,
A572/A572M, A992/A992M, A588/A588M, and A1010/A1010M (UNS S41003), respectively. When the requirements of Table
10 or Table 11 or the supplementary requirements of this specification are specified, they exceed the requirements of Specifications
A36/A36M, A572/A572M, A992/A992M, A588/A588M, and A1010/A1010M (UNS S41003). Product availability is shown in
Table 1.
1.1.2 Grades 50W [345W], 50CR [345CR], 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 A6/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 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 A6/A6M apply.
1.8 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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 Sept. 1, 2017. Published September 2017. Originally approved in 1974. Last previous edition approved in 2016 as A709/A709M – 16a. DOI:
10.1520/A0709_A0709M-17.10.1520/A0709_A0709M-17E01.
*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 ----------------------
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A709/A709M − 17
A
TABLE 1 Tensile and Hardness Requirements
NOTE 1—Where “. . .” appears in this table, there is no requirement.
Minimum Elongation, %
Structural Shape
Yield Point or Reduction
C, E E
Plate Thickness, Tensile Strength, ksi Plates an
...
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