A709-50F-2 and A709-50T-2 steel are both American standard bridge structural steels, which are used to make highway bridges and railway bridges (including sea-crossing bridges) of riveted and bolted structures.
A709 Steel Plate Overview
Common steel plate grade used primarily for the manufacture of bridges.
Heavy thicknesses (3-inches or thicker) available at most Leeco Steel distribution centers.
Available in standard grades: 36, 50 and 50W.
Available in high-performance grades: HPS 50W and HPS 70W.
Dual ASTM and AASHTO spec certifications are available.
Customers can specify A709 grades to meet Charpy test requirement for specific zones and climate.
Mechanical properties of grade A709 Grade 50
| Grade 50 (max 4" thick) | |
| Carbon max | 0.23% |
| Manganese max | 1.35% |
| Phosphorus max | 0.030% |
| Sulfur max | 0.030% |
| Silicon | 0.15-0.40% |
| Columbium | 0.005-0.05% |
| Vanadium |
0.01-0.15% |
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