Corten A belongs to the American Cu-P series steel. The weathering steel grade conforms to ASTM standards, with a yield strength of 355 MPa and a tensile strength between 470 and 630 MPa. As a representative of low-alloy high-strength atmospheric corrosion-resistant structural steel, it usually corresponds to Q355NH steel in China. It is made of copper, chromium and nickel alloys. Besides, phosphorus is added, making it most suitable for flue applications and beautiful panels.
However, due to its characteristics, it is not recommended for heavy-load applications. In such cases, Corten B or S355J2W should be considered. The top layer of the material reacts with atmospheric elements to form a rust-colored protective layer. This not only makes the steel almost maintenance-free but also provides a pleasant and consistent surface effect.
Corten A Steel Size Range
| Steel Grade | Standard | Size | ||
| Coil | Plate | |||
| Corten A | ≤3.0 | ASTM | 0.6-14*1000-2000 | 6-100*2000-4000 |
| ≥3.0 | ASTM | 0.6-14*1000-2000 | 6-100*2000-4000 | |
Corten A Steel Equivalent Material
| Corten | EN 10025-5:2004 |
| Corten A | S355 J0WP |
Corten A Chemical Composition(%)
| Element | % by mass | Element | % by mass |
| C | 0.12 | Al | 0.015/0.06 |
| Si | 0.25/0.75 | V | – |
| Mn | 0.20/0.50 | Cu | 0.25/0.55 |
| P | 0.07/0.15 | Cr | 0.50/1.25 |
| S | 0.030 | Ni | 0.65 |
Corten A Grade Steel Plate Mechanical Property
| Grade | Thickness (mm)Strip Products | Plate Products | Yield Strength Rel N/mm² Minimum |
Tensile Strength Rm N/mm² Minimum |
Elongation A50 % Minimum |
| Corten A | 2 – 12 | 6 – 12 | 345 | 485 | 20 |
