SSAB Weathering 355
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With its corrosion resistant properties, SSAB Weathering 355 minimizes the need for maintenance and corrosion-prevention treatment, contributing significantly to low maintenance costs throughout the product life cycle.
SSAB Weathering 355 allows for good paint adhesion. The intervals for repainting can be greatly extended compared to plain carbon steel since, if a damage to the paint layer occurs, SSAB Weathering steels has the ability to form a patina layer that minimize corrosion creepage under the paint and inhibits the formation of porous expanding rust.
In addition to low maintenance costs, the reduced need for corrosion prevention means less use of paint and solvents, making SSAB Weathering 355 an environmentally friendly choice of steel.
In manufacturing, the steel contributes to excellent productivity thanks to its good formability, toughness and weldability.
The high-strength of the steel in combination with these properties makes it easier to build lighter and stronger products with increased payload for lower fuel consumption. Typical applications are containers, railway wagons and many others.
SSAB Weathering 355 hot rolled strip meets or exceeds the requirements in EN 10025-5. Upon agreement, it can be delivered dual certified and CE marked.
SSAB Weathering 355 is available in thickness 0.50-12.00 mm and width up to 1860 mm as coil, slit coil and cut to length. Length up to 16 meters as cut to length.
Test direction T = Transverse direction.
Bending properties for both longitudinal and transversal direction.
1) For Cold rolled the yield strength ReL 355-500 MPa.
The steel is grain refined.
Additional micro alloying elements Nb, V and Ti can be used.
Corrosion resistance index according to ASTM G101-04.
SSAB Weathering is delivered with SSAB Weathering tolerances. Narrower tolerances are available upon request.
Cold rolled: Thickness tolerances in accordance to EN 10131.
Hot rolled Strip: Thickness tolerances correspond to ⅔ of EN 10051 as default value.
Cold rolled: Width and length tolerances in accordance to EN 10131.
Hot rolled Strip: Width and length tolerances according to SSAB standard which offer narrower tolerances compared to EN 10051.
For coil and sheet with mill edge, the width tolerances are corresponding to -0/+20 mm.
For coil and sheet with cut edge, the width tolerances are corresponding to -0/+2 mm.
Length tolerances only apply for cut to length sheets.
Hot rolled Strip: According to EN 10051.
Hot rolled Strip:
Flatness tolerances guarantee a maximum flatness deviation of 3 mm/m in addition to the EN 10051 flatness requirements.
Flatness guarantees only apply to cut to length sheets.
Hot rolled strip products: According to EN 10163-2 Class A, Subclass 3.
Cold rolled: Annealed.
Hot rolled Strip: Thermomechanically rolled.
Surface condition
Hot rolled Strip: SSAB Weathering 355 is available with as rolled or pickled surface with mill or cut edge.
SSAB Weathering 355 is not suited for applications requiring hot working or heat treatments at temperatures above 580°C, since the material then may lose its guaranteed properties.
The scaling temperature of SSAB Weathering 355 is around 560°C.
The weldability of SSAB Weathering 355 is good. All the conventional fusion welding methods can be used when welding hot rolled SSAB Weathering 355.
To obtain the same corrosion resistance in the weld as in the base metal, special filler metals should be used.
Painting of SSAB weather resistant steel is easy and will result in good paint adhesion. This can further increase the maintenance interval of the component. In order to ensure the uniform colour of the patina, all impurities must be cleaned from the steel surface. Organic impurities such as oil or protective greases must be removed by washing with suitable solvent. Surface oxidation, oxides or rust can be removed by either shot-blasting or pickling. This will also accelerate the patina formation process. Shot-blasting is not recommended for thicknesses below 4 mm. The cleaned surface of the weathering steel can be pre-patinated by allowing the surface to get wet and dry in repeated intervals.
For information concerning fabrication, see SSAB´s brochures on www.ssab.com or consult Tech Support.
Appropriate health and safety precautions must be taken when bending, welding, cutting, grinding or otherwise working on the products.