SPA-H Corten Steel Plate

SPA-H is a high-strength weathering steel specified under JIS G3125 – the Japanese Industrial Standard for structural atmospheric corrosion-resistant steels. Known for forming a protective rust layer on its surface, SPA-H eliminates the need for painting in most outdoor applications.

With a minimum yield strength of 355 MPa, SPA-H is suitable for bridges, building structures, industrial chimneys, steel towers, and urban infrastructure projects. It is often considered equivalent to Corten B or ASTM A588 Grade B in performance.

✅ Key Features

• Superior Corrosion Resistance in industrial and marine atmospheres

• High Structural Strength (Yield ≥ 355 MPa)

• Natural Rust Appearance – Ideal for aesthetic steel architecture

• Good Weldability & Fabrication Performance

• Long-Term Durability with minimal maintenance

📌 Applications

• Steel bridges and road barriers

• Architectural facades and screens

• Weathering steel planter boxes and edging

• Industrial towers and chimneys

• Cargo containers and railcar bodies

⚙️ Mechanical Properties

Chemical Composition (Typical):

• C ≤ 0.12

• Mn: 0.20–1.60

• Si: 0.30–0.65

• P: 0.07–0.15

• S ≤ 0.030

• Cu: 0.25–0.55

• Cr: 0.40–0.65

• Ni: 0.20–0.50

📦 Supply Options

• Standard and customized plates/sheets

• Surface treatment: Pre-weathered or mill finish

• Services: Laser cutting, bending, oiling, painting

• Certification: JIS G3125, EN10204 3.1, SGS/BV on request