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A588 Grade B

ASTM A588 Grade B is a high-strength, low-alloy weathering steel designed for structural applications, offering excellent strength, durability, weldability, and resistance to atmospheric corrosion.
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ASTM A588 Grade B steel is a high-strength, low-alloy structural steel commonly used in construction and other applications requiring durability and resistance to atmospheric corrosion. It is known for its excellent mechanical properties, including a minimum yield strength of 50 ksi (345 MPa) and a minimum tensile strength of 70 ksi (485 MPa). This steel grade is primarily utilized in bridges, buildings, and other structures exposed to harsh weather conditions, as it exhibits superior corrosion resistance compared to standard carbon steel. The addition of copper, chromium, and nickel elements contributes to its enhanced weathering properties, allowing it to withstand the effects of rain, snow, humidity, and other environmental factors. Overall, ASTM A588 Grade B steel is a reliable and versatile material that offers excellent strength and corrosion resistance for various construction projects.
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Typical specification data

Technical reference

Final chemical, mechanical properties, dimensions and tolerances are confirmed against the governing specification and purchase order.

Chemical Properties
% Carbon Silicon Manganese Phosphorus Sulfur Nickel Chromium Copper Vanadium
min. - 0.15 0.75 - - - 0.40 0.20 0.01
max. 0.20 0.50 1.35 0.03 0.03 0.50 0.70 0.40 0.10
Mechanical Properties
- Tensile Strength Yield Point Elongation
min. 70 ksi [483 MPa] 50 ksi [345 MPa] 21%

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