ASME SA709 Gr 50 low alloy steel for bridges building

SA709 Gr 50 (ASME SA709 Grade 50) material is a high-strength low alloy structural steel for bridges building. SA709 Gr 50 has a minimum yield strength 345 MPa [50ksi]. As a professional low alloy steel exporter in China, we keep 5000 tons SA709 Gr 50 bridge steel plate in our stock. Our company will offer mill test certifications like raw material certificates, third party inspection report and radiography test reports if clients required.
 
SA709 Gr 50 steel equivalent

ASME SA709	ASTM A709
SA709 Gr 50	A709 Gr 50

 
Chemical composition (%)

Elements	Grade 50
Carbon, max	0.23
Manganese, max.	1.35
Phosphorous,max	0.03
Sulfur,max	0.030
Silicon	0.40 max.
Columbium	0.005-0.05

Mechanical properties

Grade	Thickness mm	Yield strength, min, kis [MPa]	Tensile strength Mpa min	Elongation in 8 in. [200 mm], min, %	Elongation in 2 in. [50 mm], min, %
Grade 50	≤100	50[345]	65[450]	18	21

 
SA709 Gr 50 alloy maintains excellent corrosion resistance, allowing it to maintain long lifespans, even during the most harsh atmospheric conditions. For application, ASME SA709 Gr 50 low alloy steel is specialized for the manufacture of bridges.