SPA-H
Data verifiedSPA-H is the JIS G3125 hot-rolled weathering steel — Japan’s Corten A equivalent, mass-produced for containers, vehicles and architecture. Its Cu-Cr-Ni-P analysis mirrors the original US Steel weathering composition.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.12 |
| Si | 0.25–0.75 |
| Mn | ≤0.60 |
| P | 0.070–0.150 |
| S | ≤0.035 |
| Cr | 0.30–1.25 |
| Ni | ≤0.65 |
| Cu | 0.25–0.55 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Yield strength | ≥355 MPa |
| Tensile strength | ≥490 MPa |
| Density | 7.85 g/cm³ |
Heat treatment
Supplied hot rolled (plate, sheet and strip to JIS G3125).
Equivalent grades
| Standard | Designation |
|---|---|
| din | S355J0WP type (near) |
| aisi | A242 type (near) |
| jis | SPA-H (JIS G3125) |
| gb | 09CuPCrNi-A (near) |
Compare side by side: SPA-H vs Corten A · SPA-H vs 09CuPCrNi-A
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Shipping containers, railway vehicles, facades, bridges, towers.
Processing: Excellent formability for a 355 MPa grade; weld with weathering filler for exposed joints.
FAQ
- SPA-H vs Corten A?
- Effectively the same weathering system and overlapping chemistry; SPA-H is the JIS product standard, Corten A the trade/EN-side designation. Tensile floors differ slightly (490 vs 470 MPa).
Need SPA-H from stock?
Steel.Wiki is sponsored by Shenzhen NewAsia Special Steel (Nasteel), a special-steel stockholder in Shenzhen stocking mold, tool and alloy steels with EN 10204 3.1 certification.
Ask for a quotationVisit NasteelSource: JIS G3125 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.