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] |
| 8199;8199;8199;8199;8199;8199;36 [250] | 36 [250] 8199;8199;8199; |
| 8199;8199;8199;8199;8199;8199;50 [345] | 50 [345] 8199;8199;8199; |
| 8199;8199;8199;8199;8199;8199;50S [345S] | 50 [345] 8199;8199;8199; |
| 8199;8199;8199;8199;8199;8199;50W [345W] | 50 [345] 8199;8199;8199; |
| 8199;8199;8199;8199;8199;8199;HPS 50W [HPS 345W] | 50 [345] 8199;8199;8199; |
| 8199;8199;8199;8199;8199;8199;50CR [345CR] | 50 [345] 8199;8199;8199; |
| 8199;8199;8199;8199;8199;8199;HPS 70W [HPS 485W] | 70 [485] 8199;8199;8199; |
| 8199;8199;8199;8199;8199;8199;HPS 100W [HPS 690W] | 100 [690] 8199;8199;8199; |
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.