What is the ASTM equivalent of S550mc steel?

The ASTM equivalent of S550MC steel, a high-strength low-alloy (HSLA) steel specified under the European standard EN 10149-2, would be ASTM A656 Grade 80. Both grades are designed for structural applications requiring high strength and excellent formability.

ASTM A656 Grade 80 is a high-strength, low-alloy steel known for its high tensile strength, good weldability, and formability. It is commonly used in structural applications such as heavy construction equipment, crane booms, truck frames, and general fabrication where high strength-to-weight ratios are crucial.

When seeking equivalents between different international standards, it's important to consider the specific requirements of the application to ensure the selected material meets the necessary mechanical properties, chemical composition, and performance characteristics. Consulting detailed material specifications and referring to cross-reference tables can help in identifying suitable equivalents across different standards.