S355J2W+N weathering steel sheets are structural steels manufactured according to EN 10025-5. The “W” designation identifies a weather-resistant steel that naturally develops a protective oxide layer when exposed to the atmosphere. This stable patina slows corrosion and significantly reduces maintenance requirements. The “+N” delivery condition indicates normalized or normalizing rolled material, ensuring consistent mechanical properties and reliable structural performance. These characteristics make this grade an excellent choice for demanding outdoor applications.
Sidastico supplies cut-to-size steel sheets processed from hot-rolled coil in a wide range of thicknesses and dimensions. Every sheet is cut according to the customer’s specifications, helping reduce material waste and simplify production. Furthermore, each delivery includes the EN 10204 3.1 inspection certificate, guaranteeing full traceability and compliance with the declared mechanical and chemical properties. Customers therefore receive certified material ready for immediate processing.
S355J2W+N weathering steel sheets are suitable for laser cutting, plasma cutting, oxy-fuel cutting, bending, drilling and welding. They are widely used for bridges, architectural façades, railway wagons, industrial plants, infrastructure projects and exposed steel structures. Over time, the protective patina enhances corrosion resistance while preserving the material’s distinctive appearance. This combination of durability and aesthetics makes the grade suitable for both engineering and architectural applications.
Compared with conventional structural steels, this material offers a longer service life in outdoor environments while reducing maintenance and corrosion protection costs. It also provides excellent mechanical strength and dependable long-term performance under demanding operating conditions.
Sidastico combines extensive stock availability with precision cut-to-size processing, certified quality and reliable deliveries. Thanks to its experience in steel sheet processing, the company supplies solutions tailored to the requirements of modern industry, ensuring consistent quality, fast lead times and dependable service for every project.
Standard
EN10025-5
Identification Number
1.8965
Classification
–
Type
Unalloyed Steel
Rolling State
Normalised
Brief Description
Structural steel with improved resistance to atmospheric corrosion.
Corrosion resistant steels slow down the deterioration of chimneys and flues.
Applications
Architectural and decor elements, bridges, chimneys, guard rails, water ducts, and containers.
Standard Coil Stock Range
| S355J2W+N | 1000 | 1250 |
|---|---|---|
| 3 | ● | |
| 4 | ● | ● |
| 5 | ● | ● |
| 6 | ● | ● |
| 8 | ● | |
| 10 | ● |
Chemical Composition
Regulatory standard
| Element | Value |
| C (%) | ≤ 0,16 |
| Si (%) | ≤ 0,50 |
| Mn (%) | 0,50-1,50 |
| P (%) | ≤ 0,30 |
| S (%) | ≤ 0,030 |
| AI (%) | |
| Nb (%) | |
| Ti (%) | |
| V (%) | |
| Mo (%) | |
| Cu (%) | 0,25-0,55 |
| Element | Value |
| Cr (%) | 0,40-0,80 |
| Ni (%) | |
| N (%) | |
| B (%) | |
| Nb+Ti+V (%) | |
| Cr+Mo+Ni (%) | |
| Ni+Cr+Cu+Mo (%) | |
| C.E.V. (%) | ≤ 0,52 |
C.E.V. (%) = C+(Mn/6)+[(Cr+Mo+V)/5]+[(Ni+Cu)/15]
Mechanical Properties
According to UNI EN 10025
| Mechanical characteristics | Direction | Thicknesses | Values |
| Re (MPa) | T | ≤ 16 | ≥ 355 |
| > 16 ≤ 40 | ≥ 345 | ||
| Rm(MPa) | T | < 3 | 510-680 |
| > 16 ≤ 100 | 470-630 | ||
| A80 (%) | T | > 1,5 ≤ 2 | 14 |
| > 2 ≤ 2,5 | 15 | ||
| > 2,5 < 3 | 16 | ||
| L | > 1,5 ≤ 2 | 16 | |
| > 2 ≤ 2,5 | 17 | ||
| > 2,5 < 3 | 18 | ||
| A5 (%) | T | ≥ 3 ≤ 40 | 20 |
| L | ≥ 3 ≤ 40 | 22 | |
| Bend Test 180° | |||
| KV 20°C (J) | |||
| KV 0°C (J) | |||
| KV -20°C (J) | L | ≥ 27 | |
| KV -40°C (J) | |||
| KV -50°C (J) |
* = Standard option
t = thickness in mm of the test piece for the bend test
L = Tensile testing carried out on longitudinal test pieces
T = Bend tests carried out on cross-cut test pieces
| Direction | Thicknesses | Values |
| T | > 1,5 ≤ 2,5 | 4 |
| > 2,5 ≤ 3 | 5 | |
| > 3 ≤ 4 | 6 | |
| > 4 ≤ 5 | 8 | |
| > 5 ≤ 6 | 10 | |
| > 5 ≤ 6 | 10 | |
| > 6 ≤ 7 | 12 | |
| > 7 ≤ 8 | 16 | |
| > 8 ≤ 10 | 20 | |
| > 10 ≤ 12 | 25 | |
| > 12 ≤ 14 | 32 | |
| > 14 ≤ 16 | 26 | |
| > 16 ≤ 18 | 45 | |
| > 18 ≤ 20 | 50 |
| Direction | Thicknesses | Values |
| L | > 1,5 ≤ 2,5 | 4 |
| > 2,5 ≤ 3 | 5 | |
| > 3 ≤ 4 | 8 | |
| > 4 ≤ 5 | 10 | |
| > 5 ≤ 6 | 12 | |
| > 6 ≤ 7 | 16 | |
| > 7 ≤ 8 | 20 | |
| > 8 ≤ 10 | 25 | |
| > 8 ≤ 10 | 25 | |
| > 10 ≤ 12 | 32 | |
| > 12 ≤ 14 | 36 | |
| > 14 ≤ 16 | 40 | |
| > 16 ≤ 18 | 50 | |
| > 18 ≤ 20 | 63 |
Tolerances
Tolerances on the dimensions and on the shape UNI EN 10051
Surface condition UNI EN 10163-2
Certifications
EN10204-3.1 CE / Declaration of Performance
DISCLAIMER: SIDASTICO S.p.A. declines any and all liability for the accuracy and precision of the information herein and reserves the right to modify any part without advanced notice.
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Via Astico, 44
36030 Fara Vic.no (VI) – IT
Tel. +39 0445/869500
info@sidastico.com
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