JIS G3125 Corten Steel Coil

JIS G3125 Corten Steel Coil covers two iconic grades: SPA-H and SPA-C, recognized for their excellent weather resistance and structural integrity. Designed for general structural applications in outdoor environments, this standard is one of Japan’s most widely used for weathering steel in architecture and construction.

These steel coils form a self-protective oxide layer that prevents further rusting and offers a natural finish. They are ideal for infrastructure projects, outdoor installations, and urban architecture.

🔹 Available Grades

SPA-H is used for structural applications, while SPA-C is more suitable for cold forming and non-structural use.

🔹 Key Features

• Natural anti-corrosion properties, ideal for exposed applications

• Superior weather resistance even in polluted urban environments

• Easy to weld, cut, and shape

• Strong, durable, and low-maintenance

• Widely accepted in architectural and engineering designs

🔹 Typical Mechanical Properties (SPA-H as reference)

🔹 Surface Finish

• Mill finish suitable for natural weathering

• Pickled and oiled surfaces optional

• Pre-rusted surfaces available for aesthetic use

🔹 Coil Specifications

🔹 Applications

• Decorative outdoor panels and facade cladding

• Railway and road infrastructure

• Equipment enclosures and transport containers

• Street furniture, signage, and landscaping

• Outdoor bridges and towers

🔹 Why Choose JIS G3125 Corten Steel Coil

• SPA-H and SPA-C are trusted, globally recognized grades

• Long-term rust resistance with aesthetic appeal

• Flexible for both structural and non-structural use

• Full technical support with inspection reports

• Readily available for international markets