Steel grades
S355W - Indaten® structural weathering steel grades
These grades are fine grain, high strength structural steels offering high yield strength and improved corrosion resistance in specific aggressive environments. These grades have excellent weldability with all the usual welding processes because of their low carbon content and fine grained structure.
When used uncoated and exposed to bad weather, an oxide layer develops on the steel surface, forming a purplish-brown, finely grained patina that bonds very strongly to the steel and protects it. With their characteristic colour, steels with improved atmospheric corrosion resistance are used in architectural projects like bridges either to harmonise with the environment or to optimise maintenance costs all along the construction life cycle.
Technical information
Indaten® 355H meets the requirements of the reference standard and has been further optimised to give extremely high processing and in-service performance.
Since 1 July 2013, the Construction Products Regulation (Regulation (EU) No. 305/2011 – CPR) has required that CE marking be affixed to all products delivered in accordance with a harmonised standard. This CE marking guarantees, for the uses defined in the standard, the properties described in the declaration of performance submitted by the manufacturer. All of the steels in this data description comply with this regulation.
Mechanical properties:
| EN Standard | Designation | Direction | Thickness | Re | Rm | A 5.65√So | KV 20°C | KV 0°C | KV -10°C | KV -20°C | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| EN 10027-1 | EN 10027-2 | (mm) | (MPa) | (MPa) | (%) | (J) | (J) | (J) | (J) | ||
| EN 10025-5 | S355W | L | 5 - 100 |
J0 | J2 | ||||||
| ≥ 27 | ≥ 27 | ||||||||||
| K2 | |||||||||||
| ≥ 40 | |||||||||||
| T | 5 - 16 | ≥ 355 | 470 - 630 | 20 | |||||||
| 16 - 40 | ≥ 345 | ||||||||||
| 40 - 63 | ≥ 335 | ≥ 19 | |||||||||
| 63 - 80 | ≥ 325 | ≥ 18 | |||||||||
| 80 - 100 | ≥ 315 | ||||||||||
| EN 10025-5 | Indaten® 355HD | L | 5 - 16 | ≥ 355 | 470 - 630 | ≥ 20 | |||||
| 16 - 40 | ≥ 345 | ||||||||||
| 40 - 63 | ≥ 335 | ||||||||||
| 63 - 80 | ≥ 325 | ||||||||||
| T | 5 - 80 | - | - | ≥ 22 | K2 | ||||||
| ≥ 40 | |||||||||||
Chemical properties:
| EN Standard | Designation | Thickness | C | Mn | P | S | Si | Al | Cu | Cr | Ni | N | V | Nb | Mo | Zr | Ceq | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| EN 10027-1 | EN 10027-2 | (mm) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | |
| EN 10025-5 | S355J0W | 1.8959 | 5 - 100 | ≤0.16 | 0.5-1.5 | ≤0.035 | ≤0.035 | ≤0.50 | 0.25-0.55 | 0.40-0.80 | ≤0.65 | ≤0.009 | ≤0.30 | ≤0.15 | ≤0.52 | |||
| S355J2W | 1.8965 | 5 - 100 | ≤0.16 | 0.5-1.5 | ≤0.030 | ≤0.030 | ≤0.50 | 0.25-0.55 | 0.40-0.80 | ≤0.65 | ≤0.30 | ≤0.15 | ≤0.52 | |||||
| S355K2W | 1.8967 | 5 - 100 | ≤0.16 | 0.5-1.5 | ≤0.030 | ≤0.030 | ≤0.50 | 0.25-0.55 | 0.40-0.80 | ≤0.65 | - | ≤0.30 | ≤0.15 | ≤0.52 | ||||
| Indaten® 355HD | 5 - 80 | ≤0.16 | 0.5-1.5 | ≤0.025 | ≤0.025 | ≤0.50 | ≤0.020 | 0.25-0.55 | 0.40-0.80 | ≤0.65 | - | 0.02-0.25 | 0.015-0.060 | ≤0.30 | ≤0.15 | ≤0.52 | ||