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ASTM International - ASTM A709/A709M-09

Standard Specification for Structural Steel for Bridges

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Organization: ASTM International
Publication Date: 1 April 2009
Status: inactive
Page Count: 7
ICS Code (Heat-treatable steels): 77.140.10
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.

GradePlate 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
Area

C,D
min, %

Plates and Bars

C,E

Shapes

E

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] min ... .. 20 19 ...
50 [345] to 4 [100], incl all 50 [345] min 65 [450] min 18 21 18 21

F

...
50S [345S]

G

all 50-65
[345-450]

HI

65 [450]

H min

...... 18 21 ...
50W [345W] and
HPS 50W
[HPS 345W]
to 4 [100], incl all 50 [345] min 70 [485] min 18 21 18 21

J

...
HPS 70W
[HPS 485 W]
to 4 [100], incl

G

70 [485] min

B

85-110 [585-760] ... 19

K

... ... ...
HPS 100W
[HPS 690W]
to 2½ [65], incl

G

100 [690] min

B

110-130 [760-895] ... 18

K

... ...

L

A See specimen orientation and preparation subsection in the Tension Tests section of Specification A 6/A 6M.

B Measured at 0.2 % offset or 0.5 % extension under load as described in Section 13 of Test Methods A 370.

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 A 6/A 6M.

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 A 370) 1½-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 A 370) 1 ½-in. [40-mm] wide specimen; 50 % minimum applies if measured on the Fig. 4 (Test Methods A 370) ½-in. [12.5-mm] round specimen.

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... View More

Document History

November 1, 2021
Standard Specification for Structural Steel for Bridges
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...
November 15, 2018
Standard Specification for Structural Steel for Bridges
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September 1, 2017
Standard Specification for Structural Steel for Bridges
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September 1, 2017
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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...
May 1, 2016
Standard Specification for Structural Steel for Bridges
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....
February 15, 2016
Standard Specification for Structural Steel for Bridges
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....
September 1, 2015
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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....
October 1, 2013
Standard Specification for Structural Steel for Bridges
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....
May 1, 2013
Standard Specification for Structural Steel for Bridges
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....
May 1, 2011
Standard Specification for Structural Steel for Bridges
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...
September 1, 2010
Standard Specification for Structural Steel for Bridges
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...
October 1, 2009
Standard Specification for Structural Steel for Bridges
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....
ASTM A709/A709M-09
April 1, 2009
Standard Specification for Structural Steel for Bridges
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....
October 1, 2008
Standard Specification for Structural Steel for Bridges
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....
March 1, 2007
Standard Specification for Structural Steel for Bridges
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....
September 1, 2006
Standard Specification for Structural Steel for Bridges
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....
March 15, 2006
Standard Specification for Structural Steel for Bridges
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....
April 1, 2005
Standard Specification for Structural Steel for Bridges
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....
September 1, 2004
Standard Specification for Carbon and High-Strength Low-Alloy Structural Steel Shapes, Plates, and Bars and Quenched-and-Tempered Alloy Structural Steel Plates for Bridges
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April 1, 2004
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May 10, 2003
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