JIS G3106 standard SM400C Hot Rolled structural Steel Plate

SM400C steel plate is a high-toughness structural steel under the JIS G3106 standard, designed for use in welded steel structures that require superior impact resistance, especially in low-temperature environments. It has a minimum yield strength of 245 MPa and a tensile strength of 400–510 MPa, providing reliable performance for critical load-bearing applications.

One of the key features of SM400C is its guaranteed impact toughness at -20°C, making it suitable for cold climate construction, heavy-duty infrastructure, bridges, and offshore or industrial projects where materials may face extreme temperature or shock loads.

The steel also offers excellent weldability and formability, enabling efficient cutting, bending, drilling, and machining during fabrication. Its stable mechanical properties, combined with cost-effectiveness, make SM400C an ideal choice for large-scale structural components, machinery frameworks, and safety-critical infrastructure.

Applications

Bridges, trusses, and structural frameworks in cold climates
Used in structural members that require minimum yield strength of 245 MPa, tensile strength 400–510 MPa, and impact toughness guaranteed at -20°C to ensure reliability in low-temperature environments.

Industrial machinery bases and support structures
Suitable for heavy-load industrial components where elongation ≥23% and good formability allow cutting, bending, and welding without compromising strength.

Offshore platforms and heavy-load constructions
With thickness range of 6–300 mm and stable mechanical properties, SM400C can withstand dynamic loads, shock, and low temperatures typical of offshore or coastal projects.

Storage tanks, steel platforms, and civil infrastructure components
Ensures durable performance under environmental exposure, combining corrosion resistance, stable strength, and low-temperature toughness for long-term service in infrastructure and large-scale construction projects.