A 709-50 has good strength to weight ratios and is conducive to bridge and support applications. The enhanced strength allows for thinner sections and yield the same support over heavier uses of mild steel.
*Elements represented in percentage
Where “-” appears in this table, there is no requirement.
| Grade | Plate Thickness, in. [mm] | Yield Point or Yield Strength, Bksi [MPa] | Tensile Strength, ksi [MPa] | Min. Elongation, % |
|---|---|---|---|---|
| Plates and BarsC,E | ||||
| 8 in. or 200 mm | ||||
| 36 [250] | to 4 [100], incl | 36 [250] min | 58-80 [400-550] | 20 |
| 36 [250] min | 58 [400] min | – | ||
| 50 [345] | to 4 [100], incl | 50 [345] min | 65 [450] min | 18 |
| 50S [345S] | G | 50-65 [345-450]H,I | 65 [450]Hmin | – |
| 50W [345W] and HPS 50W [HPS 345W] | to 4[100], incl | 50 [345] min | 70 [485] | 18 |
| HPS 70W [HPS 485 W] | to 4[100], incl | 70 [485] minB | 85-110 [585-760] | – |
| HPS 100W [HPS 690 W] | to 2½[65], incl | 100 [690] minB | 110-130 [760-895] | – |
| over 2½ to 4 [65 to 100], inclM | 90 [620] minB | 100-130 [690-895] | – |
