S355J0WP weathering steel plates are structural steels manufactured according to EN 10025-5. Their chemical composition allows the surface to develop a protective patina that significantly slows atmospheric corrosion. As a result, they are an excellent choice for outdoor structures requiring long service life, reduced maintenance and reliable mechanical performance.
Sidastico supplies cut-to-size plates in a wide range of thicknesses and dimensions. Precision cutting reduces material waste and simplifies production processes. Furthermore, every delivery includes the EN 10204 3.1 inspection certificate, ensuring full traceability and compliance with the declared mechanical and chemical properties.
S355J0WP weathering steel plates 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, steel structures and other outdoor applications exposed to changing weather conditions. Over time, the protective oxide layer improves corrosion resistance while preserving the material’s characteristic appearance.
Compared with conventional structural steels, this grade reduces maintenance requirements and extends the service life of steel structures. It also provides aesthetic advantages where the natural weathered finish is an important architectural feature.
Sidastico combines extensive stock availability with precision processing, fast deliveries and technical support, providing reliable solutions for demanding industrial and construction projects.
Standard
EN10025-5
Identification Number
1.8945
Classification
–
Type
Unalloyed Steel
Rolling State
AR – Rolling blank
Brief Description
Structural steel with improved resistance to atmospheric corrosion. Material with good workability.
Corrosion resistant steels slow down the deterioration of chimneys and flues.
Applications
Architectural façades, chimneys, bridges, containers, industrial tanks and filters.
Standard Coil Stock Range
| S355J0WP | 1000 | 1250 | 1500 | 2000 |
|---|---|---|---|---|
| 1,5 | ● | |||
| 2 | ● | ● | ● | |
| 2,5 | ● | ● | ||
| 3 | ● | ● | ● | ● |
| 4 | ● | ● | ● | ● |
| 5 | ● | ● | ● | ● |
| 6 | ● | ● | ● | ● |
| 8 | ● | ● | ● | |
| 10 | ● | ● | ||
| 12 | ● | ● | ||
| 15 | ● | ● | ||
| 20 | ● | ● |
Chemical Composition
Regulatory standard
| Element | Value |
| C (%) | ≤ 0,120 |
| Si (%) | ≤ 0,75 |
| Mn (%) | ≤ 1,00 |
| P (%) | 0,06-0,15 |
| S (%) | ≤ 0,035 |
| AI (%) | |
| Nb (%) | |
| Ti (%) | |
| V (%) | |
| Mo (%) | |
| Cu (%) | 0,25-0,55 |
| Element | Value |
| Cr (%) | 0,30-1,25 |
| Ni (%) | |
| N (%) | ≤ 0,012 |
| 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 | 17 |
| > 2 ≤ 2,5 | 18 | ||
| > 2,5 < 3 | 19 | ||
| L | > 1,5 ≤ 2 | 19 | |
| > 2 ≤ 2,5 | 20 | ||
| > 2,5 < 3 | 21 | ||
| A5 (%) | T | ≥ 3 ≤ 40 | 24 |
| L | ≥ 3 ≤ 40 | 26 | |
| 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
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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