ASTM A709/A709M-16a
(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 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 A36/A36M, A572/A572M, A992/A992M, and A588/A588M, respectively. When the requirements of Table 9 or Table 10 or the supplementary requirements of this specification are specified, they exceed the requirements of Specifications A36/A36M, A572/A572M, A992/A992M, and A588/A588M.
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. (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 10). (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 specified shall have a minimum content of 0.20 % by heat analysis (0.18 % by product analysis).(B) Manganese, minimum by heat analysis of 0.80 % (0.75 % by product analysis) shall ...
General Information
Relations
Buy Standard
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:A709/A709M −16a
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. Scope* American Association of State Highway and Transportation
Officials(AASHTO)requirementsforbothfracturecriticaland
1.1 This specification covers carbon and high-strength low-
non-fracture critical members.
alloy steel structural shapes, plates, and bars and quenched and
tempered alloy steel for structural plates intended for use in 1.5 Supplementary requirements are available but shall
bridges. Seven grades are available in four yield strength levels apply only if specified in the purchase order.
as follows:
1.6 The values stated in either SI units or inch-pound units
Grade U.S. [SI] Yield Strength, ksi [MPa]
are to be regarded separately as standard. The values stated in
36 [250] 36 [250]
each system may not be exact equivalents; therefore, each
50 [345] 50 [345]
system shall be used independently of the other. Combining
50S [345S] 50 [345]
50W [345W] 50 [345]
values from the two systems may result in non-conformance
HPS 50W [HPS 345W] 50 [345]
with the standard.
HPS 70W [HPS 485W] 70 [485]
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], and 50W
nished without heat treatment or with stress relieving only, the
[345W] are also included in Specifications A36/A36M, A572/
additional requirements, including additional testing require-
A572M, A992/A992M, and A588/A588M, respectively. When
ments and the reporting of additional test results, of Specifi-
the requirements of Table 9 or Table 10 or the supplementary
cation A6/A6M apply.
requirements of this specification are specified, they exceed the
requirements of Specifications A36/A36M, A572/A572M,
2. Referenced Documents
A992/A992M, and A588/A588M.
2
2.1 ASTM Standards:
1.1.2 Grades 50W [345W], HPS 50W [HPS 345W], HPS
A6/A6M Specification for General Requirements for Rolled
70W [HPS 485W], and HPS 100W [HPS 690W] have en-
Structural Steel Bars, Plates, Shapes, and Sheet Piling
hanced atmospheric corrosion resistance (see 13.1.2). Product
A36/A36M Specification for Carbon Structural Steel
availability is shown in Table 1.
A370 Test Methods and Definitions for Mechanical Testing
1.2 Grade HPS 70W [HPS 485W] or HPS 100W [HPS
of Steel Products
690W] shall not be substituted for Grades 36 [250], 50 [345],
A572/A572M Specification for High-Strength Low-Alloy
50S [345S], 50W [345W], or HPS 50W [HPS 345W]. Grade
Columbium-Vanadium Structural Steel
50W [345W], or HPS 50W [HPS 345W] shall not be substi-
A588/A588M Specification for High-Strength Low-Alloy
tuted for Grades 36 [250], 50 [345] or 50S [345S] without
Structural Steel, up to 50 ksi [345 MPa] Minimum Yield
agreement between the purchaser and the supplier.
Point, with Atmospheric Corrosion Resistance
A673/A673M Specification for Sampling Procedure for Im-
1.3 When the steel is to be welded, it is presupposed that a
pact Testing of Structural Steel
welding procedure suitable for the grade of steel and intended
A992/A992M Specification for Structural Steel Shapes
use or service will be utilized. See Appendix X3 of Specifica-
G101 Guide for Estimating the Atmospheric Corrosion Re-
tion A6/A6M for information on weldability.
sistance of Low-Alloy Steels
1.4 Forstructuralproductstobeusedastensioncomponents
requiring notch toughness testing, standardized requirements
3. Terminology
are provided in this standard, and they are based upon
3.1 Definitions of Terms Specific to This Standard:
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 May 1, 2016. Published May 2016. 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 – 16. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/A0709_A0709M-16A. 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 ----------------------
A709/A709M−16a
A
TABLE 1 Tensile and Hardness Requirements
NOTE 1—Where “.
...
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: A709/A709M − 16 A709/A709M − 16a
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. 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 A36/A36M, A572/A572M,
A992/A992M, and A588/A588M, respectively. When the requirements of Table 9 or Table 10 or the supplementary requirements
of this specification are specified, they exceed the requirements of Specifications A36/A36M, A572/A572M, A992/A992M, and
A588/A588M.
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 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.
2. Referenced Documents
2
2.1 ASTM Standards:
A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
A36/A36M Specification for Carbon Structural Steel
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 A01.02
on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.
Current edition approved Feb. 15, 2016May 1, 2016. Published March 2016May 2016. Originally approved in 1974. Last previous edition approved in 20152016 as
A709/A709M – 15.A709/A709M – 16. DOI: 10.1520/A0709_A0709M-16.10.1520/A0709_A0709M-16A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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 ----------------------
A709/A709M − 16a
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, ks
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.