SSAB Weathering355 steel sheets are high-strength structural steels specifically developed to provide outstanding atmospheric corrosion resistance. Their specially engineered alloy composition allows the material to form a stable protective patina over time, significantly reducing corrosion and limiting the need for additional surface treatments. As a result, SSAB Weathering355 steel sheets are an excellent choice for structures exposed to demanding outdoor environments where durability and low maintenance are essential.
Sidastico supplies cut-to-size SSAB Weathering355 steel sheets in a wide range of thicknesses and dimensions. Precision cutting ensures excellent dimensional accuracy, minimises material waste and simplifies subsequent fabrication processes. Every order is supplied with EN 10204 3.1 certification, guaranteeing full material traceability and compliance with European quality standards.
The material combines high mechanical strength with excellent weldability and outstanding fabrication properties. It is suitable for laser cutting, plasma cutting, bending and conventional manufacturing processes. Furthermore, the naturally formed protective patina helps reduce corrosion throughout the service life of the structure. Consequently, maintenance requirements can be significantly reduced while ensuring reliable long-term performance in demanding environments.
Typical applications include bridges, architectural façades, railway infrastructure, industrial plants, steel structures, outdoor constructions and civil engineering projects. In addition, this weathering steel is widely selected for projects where long service life, reduced maintenance costs and a distinctive natural appearance are important design requirements. The combination of mechanical strength and atmospheric corrosion resistance makes it a dependable solution for modern structural applications.
With extensive stock availability and advanced steel processing capabilities, Sidastico delivers cut-to-size SSAB Weathering355 steel sheets with short lead times, consistent quality and reliable service. Every solution is tailored to meet the requirements of demanding industrial applications while ensuring precision, efficiency and long-term performance.
Standard
EN 10025-5
Identification Number
1.8959
Classification
Special structural steel
Type
Micro-alloyed atmospheric corrosion resistant steel
Rolling State
AR – Rolling blank
Brief Description
High-strength structural steel resistant to atmospheric corrosion. Thanks to its alloying elements, it develops a natural protective surface layer that slows down the oxidation process, ensuring high durability without the need for additional protective treatments.
Applications
Bridges, metal structures, architectural facades, heavy steel constructions, containers, industrial vehicles, machinery and applications exposed to atmospheric conditions.
Standard Coil Stock Range
| SSABWeathering355® | 1250 | 1500 |
|---|---|---|
| 0,6 | ● | |
| 0,8 | ● | ● |
| 1 | ● | ● |
| 1,2 | ● | ● |
| 1,5 | ● | ● |
Chemical Composition
Regulatory standard
| Element | Value |
| C (%) | ≤ 0,16 |
| Si (%) | ≤ 0,50 |
| Mn (%) | ≤ 1,50 |
| P (%) | ≤ 0,035 |
| S (%) | ≤ 0,030 |
| AI (%) | |
| Nb (%) | |
| Ti (%) | |
| V (%) | |
| Mo (%) | |
| Cu (%) | 0,25-0,55 |
| Element | Value |
| Cr (%) | 0,40-0,80 |
| Ni (%) | ≤ 0,65 |
| N (%) | |
| B (%) | |
| Nb+Ti+V (%) | |
| Cr+Mo+Ni (%) | |
| Ni+Cr+Cu+Mo (%) | |
| C.E.V. (%) |
C.E.V. (%) = C+(Mn/6)+[(Cr+Mo+V)/5]+[(Ni+Cu)/15]
Mechanical Properties
According to UNI EN 10025-5
| Mechanical characteristics | Direction | Thicknesses | Values |
| Re (MPa) | T | < 3 | ≥ 355 |
| Rm(MPa) | T | ≤ 3 | 470-630 |
| A80 (%) | |||
| A5 (%) | T | < 3 | ≥ 20 |
| Bend Test 180° | |||
| KV 20°C (J) | |||
| KV 0°C (J) | |||
| KV -20°C (J) | |||
| 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
Dimensions and shape: EN 10051
Surface quality: EN 10163-2
Certifications
EN 10204 – 3.1
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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36030 Fara Vic.no (VI) – IT
Tel. +39 0445/869500
info@sidastico.com
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