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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 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.
TABLE 1 Tensile and Hardness RequirementsA
Note 1: 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, % | Reduction of AreaC,Dmin, % | |||
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] min | ... | ... | 20 | 19 | ... | |
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50 [345] | to 4 [100], incl | all | 50 [345] min | 65 [450] min | 18 | 21 | 18 | 21F | ... |
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50S [345S] | G | all | 50–65 | 65 [450]H min | ... | ... | 18 | 21 | ... |
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50W [345W] | to 4 [100], incl | all | 50 [345] min | 70 [485] min | 18 | 21 | 18 | 21J | ... |
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50CR [345CR] | to 2 [50], incl | G | 50 [345] min | 70 [485] min | 18 | 21 | ... | ... | ... |
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HPS 70W | to 4 [100], incl | G | 70 [485] minB | 85–110 [585–760] | ... | 19K | ... | ... | General InformationStatus : Historical Standard Type: Main Document No: ASTM A709/A709M : 17 Document Year: 2017 Pages: 8
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