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SPA-H SPA-C Japanese Weathering Steel Plate | JIS G3125
- Japanese standard weathering steel complying with JIS G3125
- Good atmospheric corrosion resistance for outdoor and transportation applications
- High strength and excellent formability for container and structural fabrication
- Suitable for shipping containers, railway vehicles and outdoor equipment
- Full MTC available, custom cutting and size processing supported
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Product Overview
SPA-H and SPA-C are Japanese standard weathering steel grades manufactured according to JIS G3125. They are widely used in shipping containers, transportation equipment, railway vehicles and outdoor structural parts where atmospheric corrosion resistance and good formability are required.
SPA-H is the most common grade for shipping containers. It contains copper and chromium, which improve atmospheric corrosion resistance by promoting a stable protective rust layer. SPA-H has good strength, ductility and bending performance, making it suitable for container corner posts, frame members and other structural parts that require forming and welding.
SPA-C is a higher-strength Japanese weathering steel with better mechanical properties than SPA-H. It is suitable for more demanding structural applications, including railway vehicles, heavy transportation equipment and outdoor industrial structures where higher strength and corrosion resistance are needed.
Both grades are designed for use in uncoated or lightly coated conditions. Under normal atmospheric exposure, they form a dense and stable rust patina that reduces further corrosion. We can supply SPA-H and SPA-C plates in various thicknesses and support cutting, bending, welding and fabrication according to customer drawings.
Chemical & Mechanical Property Snapshot
Detailed Technical Specifications
Product Comparison Table
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Reliable Steel Coil Solutions For Diverse Industrial Applications
Outdoor Sculpture
Curtain Wall & Planter
Shipping Container
Railway Wagon
Bridge Structure
Power Plant Chimney
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FAQs
SPA-H is a general-grade Japanese weathering steel for shipping containers and transport equipment, while SPA-C has higher yield strength and tensile strength for more demanding structural applications.
Yes, SPA-H is one of the most widely used Japanese weathering steel grades for shipping containers due to its good corrosion resistance, strength and formability.
Yes, SPA-C can be used for outdoor industrial structures, railway vehicles and heavy transportation equipment where higher strength and atmospheric corrosion resistance are required.
Yes, we provide EN 10204 3.1 or 3.2 mill test certificates for each batch, including chemical composition and mechanical properties.
MOQ is 5 tons. In-stock goods can be delivered within 3–7 days, while customized production usually takes 10–25 days.
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