SSAB Weathering steel with superb corrosion resistance

SSAB Weathering steel is a corrosion-resistant steel that will minimize total life cycle costs, thanks to its low maintenance needs.

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With SSAB Weathering you can design uniqueness into every project

Benefits of using SSAB Weathering steel

High strength structural steel

SSAB Weathering steel is available in yield strength levels from 355–960 MPa, which makes it the perfect corrosion resistant base material for stronger, lighter and more sustainable solutions.

Designing uniqueness into every project

The unique natural look, which changes over time as the surface ages, is created by the oxidation process. SSAB Weathering blends into the environment and combines well with other building materials.

Environmentally friendly

Painted or unpainted, SSAB Weathering steels ensure longer service life at minimum or even no maintenance work. When painted, it can double intervals between maintenance painting compared to other steels, halving maintenance costs.

SSAB Weathering steel can reduce your carbon footprint

Galvanizing or painting steel for construction projects increases C02 emissions and costs. SSAB Weathering steel has a natural patina that makes it a more sustainable solution.

New weathering steel grades for superior weldability and higher strength

SSAB is now introducing high-strength weathering steel grades 420 ML and 460 ML. When you specify these high-strength grades in bridge construction or to build rolling stock or other structures, you can use less steel yet maintain high strength. Upgrading to these higher-strength steels gives you superior weldability, lower life cycle costs and improved sustainability.

SSAB tech support is here to help you

SSAB Tech Support has a high local presence worldwide and can visit customers at short notice to solve acute problems or to initiate longer term co-development projects.

SSAB Tech Support can help you with all questions you have about SSAB Weathering

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Calculate to make the right decision

How much corrosion can weathering steel resist? All steels oxidize after some time, but some more than others. When choosing the thickness of the steel, you should take corrosion levels into account.

If you choose to use weathering steel without painting it, you will save dioxide emissions. If painting, you still have reduced CO2 emissions because you would not have to repaint the steel as often as with a regular carbon steel.

SSAB Weathering steel for your industry

SSAB Weathering for structures and bridges

Structures and bridges

SSAB Weathering is the ideal choice for steel constructions that are difficult to reach and expensive to maintain.
SSAB Weathering for heavy transport

Heavy transport

Heavy transports in SSAB Weathering steel are strong, hardwearing, take higher payloads and are relatively light compared to vehicles made from conventional steel.
SSAB Weathering steel for process industries

Process Industries

SSAB Weathering steels is resistant to high temperatures and a sulfur-rich atmosphere, common in petrochemical plants.

SSAB Weathering sections

If you’re looking for low-maintenance, corrosion-resistant steel sections with a high sustainability profile, you can rely on SSAB Weathering open sections. A great choice for minimizing total life cycle costs in long-lasting bridges, transport equipment, outdoor art and other structures.

SSAB Weathering sections

The patina formation process

At first, the steel begins to rust in the same fashion as non-weathering steel once it’s exposed to wet and dry conditions. However, as time passes, the rust layer transforms into a patina layer, and the color changes from a fresh, newly developed orange-brown, to a light or dark brown.

The speed of change and the final color of the steel are dependent on the atmospheric conditions of a site and the level of pollution – sulfur dense atmospheres will speed up the oxidation process and result in a darker patina. Frequent cycles of wet and dry conditions will also speed up oxidation. The entire oxidation process for this corrosion-resistant steel usually takes between 2–6 years.

Rust – the perfect protection

SSAB Weathering steel is extremely strong and protected by a patina layer of rust that is formed during the oxidation process, when exposed to alternating wet and dry conditions. Thanks to this, not only does the unpainted weathering steel require minimum maintenance, but also will slow any further oxidation of the steel.

COR-TEN® for buildings and art

COR-TEN® is a well-known weathering steel brand for buildings and structures, and a favorite facade material among architects and designers. The combination of high-strength, aesthetic appearance, low maintenance and flexibility, make it an ideal choice for projects of all shapes and sizes.