ASTM A588 Grade A Weathering Steel Plate is a high-strength low-alloy steel that combines all the benefits of A572 Gr.50 with superior corrosion resistance.
The elevated copper content in ASTM A588 Grade A promotes a self-protecting rust patina, giving the steel its characteristic reddish oxide finish that naturally shields against atmospheric corrosion.
ASTM A588 Grade A Weathering Steel Plate Data Sheet
| Parameter | Value |
|---|---|
| Specification | Thickness ≤ 200 mm |
| Density | 7.85 g/cm³ |
| Fabrication/Processing | Cutting, Welding, Pre-rusting, Perforation |
| Third-Party Inspection | SGS, BV, Intertek, PMI, etc. |
| Delivery Condition | Hot Rolled (HR) |
Chemical Composition (Grade A)
| Grade | C max | Mn | P max | S max | Si | Ni max | Cr | Cu | V |
|---|---|---|---|---|---|---|---|---|---|
| A588 Grade A | 0.19 | 0.80–1.25 | 0.04 | 0.05 | 0.30–0.65 | 0.40 | 0.40–0.65 | 0.25–0.40 | 0.02–0.10 |
Mechanical Properties
| Thickness | Tensile Strength Min (MPa) | Yield Strength Min (MPa) | Elongation Min (%) |
|---|---|---|---|
| < 100 mm | 485 | 345 | 21 |
| 100–125 mm | 460 | 315 | 21 |
| 125–200 mm | 435 | 290 | 21 |
Equivalent Grades (Reference Only)
| China (GB) | USA (ASTM) | Japan (JIS) | EU (EN) | Germany (DIN/WNr) | France (AFNOR) | England (BS) | European Old (EN) | International (ISO) |
|---|---|---|---|---|---|---|---|---|
| 09CuPCrNi-A | Corten A | SPA-H | S355J0WP | 9CrNiCuP324 | E36WA3 | WR50A | Fe510C1KI | Fe355W-1A |
| - | Corten B | - | - | - | - | - | - | - |
Applications
ASTM A588 Grade A Weathering Steel Plate is commonly used in unpainted structural applications, offering long-term durability and lower maintenance costs. Typical applications include:
Bridges and pedestrian overpasses
Railcars and container structures
Cranes and transmission towers
Highway poles and utility structures
Chemical plants and industrial facilities
Shipbuilding and marine structures
Medical and factory construction
