Stainless Steel Sheet EN 1.4462/4835

Tibnor stocks hot- and cold-finished stainless sheet in grade EN 1.4462 which is a so-called duplex stainless steel and as such is characterised by a roughly 50-50 mixture of austenite and ferrite. The content of chromium is higher and that of nickel is lower than for traditional austenitic stainless types such as EN 1.4404, 1.4432 or 1.4436 but in common with these grades 1.4462 is alloyed with molybdenum. The steel is also alloyed with nitrogen. The yield strength of 1.4462 is about double that of the austenitic steels mentioned.  

Flat formats of 1.4462 are standardised in EN 10088-2. This standard covers hot-finished sheet with thicknesses up to and including 13.5 mm and cold-finished sheet up to and including 8 mm. 

Thanks to the high content of chromium in combination with molybdenum and nitrogen, 1.4462 is characterised by excellent corrosion resistance even in aggressive environments, especially those with high chloride content (sea water). Furthermore, its duplex character renders the steel much more resistant than austenitic types to stress-corrosion cracking in chloride-laden environments. Its good corrosion resistance along with high strength makes the material an attractive alternative for load-bearing constructions, with chemical plant and the marine and offshore segments meriting special mention. 

1.4462 is relatively easy to weld using the same procedures as for austenitic steels. Its cold formability is good but the higher strength means that the forces needed will be higher and springback more pronounced than for an austenitic grade with the same dimension. 

The cold-finished sheet that is stocked has surface finish 2E (annealed with scale removed mechanically) whereas the finish of hot-rolled sheet is 1D (annealed and pickled).