Products Description
SMA400BP Hot Rolled Corten Steel Plate is a low-alloy atmospheric corrosion-resistant structural steel that complies with the Japanese standard JIS G3114. Compared with ordinary steel, it does not require frequent painting in natural environments, as it can form a protective oxide layer on its own.

This significantly enhances corrosion resistance, reduces maintenance costs, and extends the service life of the steel. Whether used in bridges, building facades, or landscape designs, SMA400BP Hot Rolled Steel Plate maintains excellent weathering strength while adding aesthetic appeal, achieving seamless integration with the surrounding environment.
Specifications
Thickness: 3mm – 150mm
Width: 30mm – 4000mm
Length: 1000mm – 12000mm
Standards: ASTM, EN10025, JIS, GB
Chemical Composition
| Element | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Cu (%) | Thickness (mm) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Value | ≤0.18 | ≤0.55 | ≤1.25 | ≤0.035 | ≤0.035 | 0.45–0.75 | 0.30–0.90 | ≤16 | ≥245 | 400–540 | ≥23 |
Mechanical Properties
| Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Thickness (mm) |
|---|---|---|---|---|
| SMA400BP | ≥245 | 400–540 | ≥23 | ≤16 |
Features
Excellent weather resistance:
The self-protective rust layer reduces corrosion rates by 6–8 times compared to ordinary carbon steel, extending service life in atmospheric environments to 20–40 years (without additional anti-corrosion coatings).
Excellent mechanical properties:
SMA400BP Rusty Metal Steel Plate has a yield strength of ≥245 MPa, tensile strength of 400–540 MPa, and elongation of ≥23%, offering high strength and good toughness for structural applications.
Excellent Weldability:
Good weldability Compatible with conventional welding processes (such as manual arc welding and gas shielded welding), no special welding materials are required, and the strength of the welded joint can reach over 95% of the base material.
Economical & Eco-friendly:
Economic and environmentally friendly Since it can form a stable rust-red protective layer in natural environments, maintenance cycles are extended, and coating and maintenance costs can be reduced by 30–50%, balancing functionality and decorative effects.
Common Uses

Railway Engineering and Bridge Construction: SMA400BP Corten plate is widely used in railway bridges, including main girders, bridge decks, and track-related structural components. Its high strength and weather resistance ensure long-term load-bearing capacity and durability, while reducing maintenance needs.
Container Manufacturing: SMA400BP weathering plate is suitable for standard shipping containers and specialized transport enclosures. With excellent corrosion resistance and strength, it effectively extends the service life of containers in harsh transportation environments.
Landscaping, Sculpture, and Architectural Facades: SMA400BP Corten plate is commonly applied to outdoor sculptures, landscape installations, building exteriors, and curtain walls. It not only withstands environmental erosion but also develops a natural patina, enhancing aesthetic appeal and blending with the surroundings.
Docks, Ports, and Marine Engineering: SMA400BP weathering Steel plate is good for breakwaters, dock platforms, and port protective structures. Its superior weather resistance enables it to withstand salt spray, humidity, and marine environments for long-term building structural safety.
Structural Components for Machinery and Vehicles: SMA400BP Corten plate can be used in construction machinery, vehicle chassis, and other load-bearing components. It provides high strength, toughness, and reliability, ensuring operational safety in demanding applications.
About Us
With years of export experience, Gnee understands international standards and buyer needs. We offer complete overseas supply solutions – from design to delivery – and support various trade terms including FOB, CIF, and DDP.
You will benefit from:
Fast sampling and competitive quotations
Professional export packaging and container loading plans
Third-party inspection and mill certificates available
Full English service and real-time order tracking
Custom labeling and neutral/personalized branding support
Contact now to get SMA400BP Quote



















