Stainless steel is the name given to steel grades which have a particularly low fraction of harmful elements such as phosphorous, sulphur, arsenic or tin. Pyrite or fool’s gold is a prime example of an iron ore that contains an element harmful to steel. Pyrite is mainly made of iron, but each iron atom is bonded with two sulphur atoms.
This combination is so unfavourable, that this ore is very rarely smelted to form steel. However, pyrite is ideally suited to the production of sulphuric acid. If harmful elements are to be removed from steel, this must be done during smelting. At high heat the contaminated elements form oxides and slags, which drop to the bottom in the melt or float to the surface, where they can be removed. If all these constituents have been reduced to a minimum level, the result is an unalloyed stainless steel.
However, despite its purity it is still susceptible to rust. Unalloyed stainless steels are frequently used in building reinforcement, as the concrete layer surrounding the steel protects against the effect of water and air. If rust-proof steels are required, the steel grades must be enriched with alloying elements such as titanium, niobium or chrome. These alloyed or high-alloyed steels then resist wind and weather, even without protective concrete layers or coatings.
Stainless steel at Rime
Metal sheets and plates made of stainless steel are also part of the scope of supply and machining of our company. We are able to purchase stainless steel from our steel suppliers in different formats, qualities and degrees of alloying and work them for you. Thanks to the high efficiency of our machines, the bandwidth of our services is virtually never insufficient. It is only punching and roll bending where, in comparison to normal steel sheets and plates, we are only able to work slightly thinner material thicknesses.