S500MC high strength hot rolled structural steel plate

S500MC steel plate is a high-strength, low-alloy hot-rolled steel plate with excellent mechanical properties and processing performance.

The "S" stands for structural steel, the "500" indicates that the yield strength is not less than 500MPa when the thickness is less than 16mm, and the "C" represents the quality grade of the steel plate.

Executive Standard：S500MC hot-rolled micro-alloyed steel plate usually complies with the European standard EN 10149-2.

The chemical composition of S500MC high strength hot rolled structural steel plate mainly includes elements such as carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), as well as possible microalloying elements like niobium, vanadium, titanium, etc.

The specific content ranges are as follows:

Carbon (C): 0.12% to 0.20%. Carbon can enhance the strength and hardness of steel, but excessively high carbon content reduces the steel's cold forming performance.

Silicon (Si): 0.50% to 1.60%. Silicon improves the strength and hardness of steel and is beneficial to cold forming processing.

Manganese (Mn): 1.30% to 1.80%. Manganese enhances the steel's strength and toughness and promotes grain refinement.

Phosphorus (P): ≤0.025%. High phosphorus content increases steel brittleness and affects its cold forming performance.

Sulfur (S): ≤0.015%. Sulfur makes steel brittle and reduces its strength and toughness.

S500MC alloy structural steel plate has high yield strength and tensile strength, while maintaining good elongation and impact toughness. The specific mechanical property indicators are as follows:

• Yield strength (Rp0.2/MPa): ≥500MPa.
• Tensile strength (Rm/MPa): 550 to 700MPa.
• Elongation after fracture (A80mm%): The specific value may vary depending on the steel plate thickness and delivery condition, but it usually does not exceed 12%.

Due to its excellent performance, S500MCspecial structural steel plate is widely used in multiple fields:

Automobile manufacturing: Used to produce automobile structural components such as frame rails, longitudinal beams, and cross beams, so as to improve the safety and load-bearing capacity of automobiles.

Engineering machinery and equipment: Applied in manufacturing engineering machinery key parts like excavators, loaders, and cranes to meet the requirements of high strength and high durability.

Building structures: Also used in building structures such as high-rise buildings and bridges as load-bearing members or supporting structures.

High strength and lightweight: With a yield strength of 500MPa, it can achieve a 15-20% reduction in component thickness. Compared with QSTE500TM, it further reduces weight by 8-10%, adapting to the "weight reduction and efficiency improvement" demand of heavy-duty vehicles.

Process economy: Thermomechanical rolling eliminates the need for subsequent quench and temper heat treatment. The cost per ton of steel is 15-20% lower than that of quenched and tempered steel with the same strength, and the whole-life cycle cost is reduced by 30%.

Welding compatibility: The low-carbon + low-alloy design allows welding without preheating, and the weld strength loss is ≤12%, making it suitable for mass assembly of large structural components.

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