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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 use in bridges. Twelve grades are available in five 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] , , , |
| , , , , , ,QST 50 [QST 345] | ,50 [345] , , , |
| , , , , , ,QST 50S [QST 345S] | ,50 [345] , , , |
| , , , , , ,50W [345W] | ,50 [345] , , , |
| , , , , , ,HPS 50W [HPS 345W] | ,50 [345] , , , |
| , , , , , ,50CR [345CR] | ,50 [345] , , , |
| , , , , , ,QST 65 [QST450] | ,65 [450] , , , |
| , , , , , ,QST 70 [QST485] | ,70 [485] , , , |
| , , , , , ,HPS 70W [HPS 485W] | ,70 [485] , , , |
| , , , , , ,HPS 100W [HPS 690W] | 100 [690] , , , |