Stainless steel & nickel alloy plates
Industeel produces a complete range of stainless plate products, starting from 12 Cr ferritics to superaustenitic and superduplex materials containing up to 30%Cr, and where iron is no longer the majority constituent of the alloy. Industeel stainless plate comes in different sizes, minimum 5 mm thickness and up to 3.5 m width.
The main groups of stainless steels are based on their atomic structure: ferritic, austenitic and austeno-ferritic (duplex). Steels become stainless when their chromium content exceeds about 12%. This resistance to corrosion comes from an chromium enriched layer, about 10 atoms thick, that is called the passive film. This film reforms and adapts to changes in the environment. If the film is removed by mechanical wear, it reforms spontaneously and re-establishes the corrosion resistance within seconds.
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Download our alloy table for more information about our grades. |
Product / Ferritic and Martensitic Stainless Steels
Ferritic stainless steels contain at least iron and chromium. They are magnetic, have a high thermal conductivity and a good resistance to corrosion. Ferritic plates are readily weldable and Industeel offers weldable martensitic or precipitation hardening (PH) steels.
Applications
These steels are used for a wide range of applications such as oil refining and hydropower.
Product / Austenitic Stainless Steels
Austenitic stainless steels contain iron, chromium and nickel. They are non-magnetic and have a lower thermal conductivity compared to their ferritic counterparts. They are easy to weld and represent more than 50% of the stainless steel usage. You can find austenitic stainless steel plates in a vast range of applications: chemical industry, large reaction vessels, nuclear industry and cryogenic applications that require corrosion resistance as well as ductility at low temperatures.
The high molybdenum nitrogen alloyed superaustenitic steels compete with nickel base alloys in many demanding applications, for example sea water and flue gas cleaning.
Product / Duplex Stainless Steels
Duplex stainless steels have a microstructure which is a mix of austenite and ferrite. Most of their physical properties are found in-between the austenitic and ferritic grades. There is a wide range of duplex stainless steel for different operating conditions. Their yield strength is about twice that of a standard austenitic material.
Traditionally, the overall market share has been 1%, but it has shown a strong growth in recent years, specially in plates. For particular applications, e.g. digesters for the pulp and paper industry or thermal desalination plants, duplex plates have a market share close to 100%.
Figure: Duplex (austeno-ferritic) microstructure. Austenite appears as bright contrast, and the darker areas are ferrite. Optimum properties are found at about a 50/50 phase balance. The interspacing between the phases is about 20 µm.
Product / Nickel Base AlloysNickel base alloys have nickel as the balancing metal. They can be alloyed with iron, chromium and molybdenum and are used in the high end of the corrosion scale, e.g. in the most aggressive parts in flue gas desulfurization units and other demanding applications. If you are not sure which steel is best suited to your needs, why not give us a call. Visit the following pages for more information:
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