Steel grades
Arcorox® structural steels with improved atmospheric corrosion resistance
Arcorox® is a range of weathering steels which offer improved resistance to atmospheric corrosion.
Technical information
Weathering steels offer improved resistance to corrosion thanks to the addition of copper during manufacturing. Additional alloying elements can be added to increase the steel’s tensile strength or make forming processes easier.
The metallurgical composition of weathering steels includes less than 0.2% carbon. Alloying elements (mainly copper, chromium, nickel, phosphorus, silicon, and manganese) typically comprise less than 5% of the steel.
Arcorox® meets the requirements of the EN 10025-5:2019 and ASTM standards. Arcorox® weathering steels are only produced in sections and merchant bars. They are used in sustainable applications which require a long service life and low maintenance costs. Bridges, railway cars, smokestacks, buildings, and works of art have all utilised weathering steels.
Mechanical properties:
| EN Standard |
Grades | Minimum yield strength ReH, MPa |
Tensile strength Rm, MPa |
Minimum elongation A, % |
|||
|---|---|---|---|---|---|---|---|
| Nominal thickness (mm) | |||||||
| ≤16 |
>16 |
>40 ≤63 |
≥3 ≤63 |
≥3 ≤40 |
≥40 ≤63 |
||
| EN 10025-5: 2019 Arcorox® |
S235J0W | 235 | 225 | - | 360-510 | 26 | 25 |
| S235J2W | 235 | 225 | - | 360-510 | 26 | 25 | |
| S355J0W | 355 | 345 | 335 | 470-630 | 22 | 21 | |
| S355J2W | 355 | 345 | 335 | 470-630 | 22 | 21 | |
S355K2W |
355 | 345 | 335 | 470-630 | 22 | 21 | |
| S460J0W |
460 | 440 | 430 | 530-710 | 17 | 16 | |
| S460J2W |
460 | 440 | 430 | 530-710 | 17 | 16 | |
| S460K2W |
460 | 440 | 430 | 530-710 | 17 | 16 | |
Minimum tonnage and delivery conditions upon agreement.
Chemical properties:
| EN Standard | Grades | Ladle analysis | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C max. (%) |
Si max. (%) |
Mn (%) |
P (%) |
S max. (%) |
N max. (%) |
Addition of n.b.e. 1) |
Cr max. (%) |
Cu (%) |
Others | CEV max. (%) |
||
| EN 10025-5: 2019 Arcorox® |
S235J0W | 0.13 | 0.40 | 0.20-0.60 | max. 0.040 | 0.040 | 0.012 | - | 0.40-0.80 | 0.25-0.55 | 2), 3) | 0.44 |
| S235J2W 5) |
0.13 | 0.40 | 0.20-0.60 | max. 0.040 | 0.035 | - | yes | 0.40-0.80 | 0.25-0.55 | 2), 3) | ||
| S355J0W | 0.16 | 0.50 | 0.50-1.50 | max. 0.040 | 0.040 | 0.012 4) | - | 0.40-0.80 | 0.25-0.55 | 2), 3) | 0.52 | |
| S355J2W 5) |
0.16 | 0.50 | 0.50-1.50 | max. 0.035 | 0.035 | - | yes | 0.40-0.80 | 0.25-0.55 | 2), 3) | ||
| S355K2W 5) |
0.16 | 0.50 | 0.50-1.50 | max. 0.035 | 0.035 | - | yes | 0.40-0.80 | 0.25-0.55 | 2), 3) | ||
| S460J0W | 0.20 | 0.65 | max. 1.40 | max. 0.040 | 0.040 | 0.025 | yes | 0.40-0.80 | 0.25-0.55 | 2), 3) | 0.52 | |
| S460J2W 5) |
0.20 | 0.65 | max. 1.40 | max. 0.035 | 0.035 | 0.025 | yes | 0.40-0.80 | 0.25-0.55 | 2), 3) | ||
| S460K2W 5) |
0.20 | 0.65 | max. 1.40 | max. 0.035 | 0.035 | 0.025 | yes | 0.40-0.80 | 0.25-0.55 | 2), 3) | ||
1) Addition of nitrogen binding elements - the steels shall contain at least one of the following elements: AI total ≥ 0.020%, Nb: 0.015 - 0.060%, V: 0.02-0.12%, Ti: 0.02 - 0.10%.
If these elements are used in combination, at least one of them shall be present with the minimum content indicated.
2) The steels may show a Ni content of max. 0.65%.
3) The steels may contain max. 0.30% Mo and max. 0.15% Zr.
4) The max. value for nitrogen does not apply if the chemical composition shows a minimum total AI content of 0.020% or if sufficient other N binding elements are present.
The N binding elements shall be mentioned in the inspection document.
5) Fully killed steel containing nitrogen binding elements in amounts sufficient to bind available nitrogen (for example 0.02% Al).
If other elements are used, they shall be reported in the inspection document.