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.
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
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