What is S550MC steel equivalent to?

S550MC alloy structural steel plate is a high yield steel under the EN10149: Part2 specification. It is a structural hot rolled steel material with high yield strength and excellent cold forming characteristics.
S550MC can be used in numerous applications including steel framed structures, structural pipes and cold rolled sections. As the material is designed to be used in load bearing applications, care should be taken when ordering to ensure that the steel has qualities required for the job in hand.
Heat treatment of S550MC is not advisable as this will reduce the yield strength of the material.

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.

Automobile Manufacturing

Heavy-duty truck frame longitudinal/cross beams (thickness 4.0-12mm): Replacing 10mm-thick QSTE550TM with 8mm-thick S550MC achieves a weight reduction of 180kg per vehicle.

New energy commercial vehicle battery pack frames (thickness 3.0-6.0mm): Combined with a pre-coated oxide layer (OX), it can reduce laser welding porosity, with a welding speed of up to 6m/min and a yield rate increased to 95%.

Engineering Machinery

Crane jibs (thickness 8.0-14mm): After a 50-ton crane adopts S550MC, the jib length is increased by 10% and the lifting capacity is improved by 15%.

Excavator dipper sticks (thickness 10.0-16mm): In mining operations, the service life of the dipper stick is 20% longer than that of QSTE550TM, reducing downtime for maintenance.

Building Structures

High-rise building frame beams/columns (thickness 6.0-16mm), bridge load-bearing trusses (thickness 8.0-14mm): Utilizes its high yield strength to reduce steel consumption.

Modular building wall keels (thickness 3.0-6.0mm): Adapts to the cold forming process, increasing installation efficiency by 20%.

EN 10149-2 Automobile structure steel plate, S550MC Automobile structure steel plate, EN 10149-2 S550MC steel plate

UT(Ultrasonic examination), AR(As Hot Rolled only), TMCP(Thermal Mechanical Control Processing), N(Normalized), Q+T(Quenched and Tempered),Z Direction Test(Z15,Z25,Z35), Charpy V-Notch Impact Test, The Third Party Test (such as SGS Test), Coated or Shot Blasting and Painting.

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