JIS G 3125 SPA-H Corten Steel Plates
SPA-H is a high-phosphorus structural weathering steel specified under the Japanese standard JIS G3125. It is globally recognized as the primary equivalent to Corten A and is predominantly used in the manufacturing of shipping containers, railway rolling stock, and architectural facades due to its minimum yield strength of 345 MPa and superior atmospheric corrosion resistance.
Weathering steel plate SPA-H has very good atmospheric corrosion resistance, but also has high temperature, abrasion, molding, fatigue, toughness, plastic extension and other characteristics; can be used naked, thinning use or simplify the use of painting. SPA-H rust resistance, can make the components thinning and reduction, resistance to atmospheric corrosion, life extension, with labor-saving and energy-saving properties, so that the components of the manufacturer, the user benefits.
APPLICATIONS
Railway rolling stock and storage hoppers /bins.
Shipping Containers
Architectural features, cladding
Sculpture Art
Appliances
Heaters
Engine components
Specific types of transport applications
Mining
Non-residential applications.
DIMENSION CAPABILITIES
THICKNESS (mm): 2.5mm~25mm
WIDTH (mm) : 50mm~2500mm
AVAILABLE PROCESS: Dry, pickled and oiled
AVAILABLE FORM: Coil, Strap, Plate, Sheet, Circle, Laser/plasma cut and more.
SPA-H corten steel material chemical composition
| Grade | C ≤ | Si | Mn | P | S ≤ | Cu | Cr | Ni ≤ |
| SPA-H | 0.12 | 0.25~0.75 | 0.20~0.50 | 0.070~0.150 | 0.04 | 0.25~0.60 | 0.30~1.25 | 0.65 |
SPA-H corten steel sheet metal mechanical property
| Grade | Plate Thickness | Yield strength | Tensile strength | elongation |
| SPA-H | 6.0mm max | min 345 MPa | min 480 MPa | min22 |
| 6.0mm min | min 335 MPa | min 490 MPa | min 15 |
Global Standard Cross-Reference for SPA-H Weathering Steel
| Country / Region | Standard | Equivalent Grade |
|---|---|---|
| Japan (JIS) | JIS G3125 | SPA-H / SPA-C |
| Europe (EN) | EN 10025-5 | S355J0WP / S355J2WP |
| USA (ASTM) | ASTM A242 / A606 | Corten A |
| China (GB) | GB/T 4171 | Q355GNH / 09CuPCrNi-A |
800TONS SPA-H HOT ROLLED CORTEN STEEL TO ALBARNIA
SPA-H steel equivalent
Key Equivalent Grades to SPA-H (JIS G3125)
USA (ASTM): A242 (Corten A), A588 Grade A (Corten B), A606 Type 4 (thinner sheets)
Europe (EN): S355J0WP, S355J2WP, S355J2W, 1.8945/1.8946
China (GB): 09CuPCrNi-A, Q355NH, Q355GNH
International/Others: ISO Fe355W-1A, SAILCOR, IRSM41-97
What is the thickness tolerance of JIS g3125 spa-h plate?
The standard outlines the specific thickness tolerance of JIS g3125 spa-h plate. The tolerance varies with the exact plate thickness and must be within the specified range. You can go through the standard specification of JIS g3125 spa h plate for thickness tolerance or consult your suppliers.
Quickly receive a variety of JIS g3125 plates for use in railway rolling stock, ranging in width from 50 to 2500 mm and thickness from 2.5 to 25 mm.
Q1: Is SPA-H the exact same as Corten A?
A: SPA-H (JIS G3125) is widely accepted as the Japanese equivalent to Corten A. Both are high-phosphorus weathering steels with excellent atmospheric corrosion resistance. SPA-H is highly preferred in Asia for manufacturing shipping containers and railway wagons due to its outstanding cost-effectiveness and formability.
Q2: What are the typical thicknesses for SPA-H in shipping container manufacturing?
A: For ISO shipping containers, SPA-H is typically supplied in hot-rolled coils or cut-to-length sheets. Popular thicknesses include 1.6mm and 2.0mm (for corrugated side/roof panels), and 3.0mm, 4.0mm, 4.5mm (for structural rails and bottom profiles). We strictly control the negative tolerance to ensure precise container weight.
Q3: Can SPA-H be used as an equivalent to S355J0WP or Q355GNH?
A: Yes. SPA-H shares very similar chemical compositions and a minimum yield strength of 345 MPa, making it an excellent, cost-saving alternative to EN standard S355J0WP and Chinese standard Q355GNH for architectural and structural applications.
Q4: How do you pack SPA-H to prevent rust during sea transit?
A: Although SPA-H is a weathering steel, premature red rust during sea freight can cause issues for laser cutting. We provide seaworthy export packing, wrapping the steel sheets/coils in waterproof kraft paper and plastic film, securing them with steel strips on iron or wooden pallets.
Q5: What welding wire should be used for SPA-H steel?
A: To ensure the weld joint matches the weather resistance and eventual rust color of the SPA-H plate, we recommend using Corten-specific welding consumables (such as ER80S-G or AWS A5.28 wires containing Copper and Nickel).
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