ASTM A709 specification covers carbon and high-strength low-alloy steel structural shapes, plates, and bars and quenched and tempered alloy steel for structural plates intended for use in bridges. Seven 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]
HPS 70W [HPS 485W] 70 [485]
HPS 100W [HPS 690W] 100 [690]
A709 Grade 50W specification covers carbon and high-strength low alloy steel structural shapes, plates and bars, and quenched and tempered alloy steel for structural plates intended for use in bridges. Heat analysis shall be used to determine the percentage of carbon, manganese, phosphorus, sulfur, silicon, and copper for the required chemical composition. A tension test shall be used to determine the required tensile properties such as tensile strength, yield strength, and elongation. Materials shall undergo: (1) an impact test for non-fracture critical and fracture critical members; and (2) a Brinell hardness test for Grades 100 and 100W. Atmospheric corrosion resistance shall also be determined.
For each A709 Grade 50W reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.50 %.
A709 Grade 50W Chemical composition:
|
C |
Si |
Mn |
P |
S |
V |
Cu |
Ni |
Cr |
|
≤0.20 |
0.15-0.50 |
0.75-1.35 |
≤0.04 |
≤0.05 |
0.02-0.10 |
0.25-0.40 |
≤0.40 |
0.40-0.65 |
A709 Grade 50W Mechanical properties:
|
Yield Strength Mpa |
Tensile Strength Mpa |
Elongation in 2 in. % |
|
≧345 |
≧485 |
≧21 |
Shanghai Katalor can supply Steel plate A709 Grade 50W specification with stock or directly from the mill. We also offer an in house profiling service where the Steel plate A709 Grade 50W specification can be cut to the size or shape you require.If you need Steel plate A709 Grade 50W specification,please feel free contact with us.
