Stainless steel
Stainless (rustless) steel is, as the name suggests, steel that cannot rust. This, however, is a fact that requires qualifying, as stainless steel can rust even though its resistance to corrosion is good. Perhaps, instead, it should be called rust-resistant steel.
In order to retain the rust protection of steel, acid must be allowed to come into contact with the surface. This makes it important to keep the surface of the sheet properly cleaned.
The steel gains its properties through various alloys, including chrome, nickel and molybdenum. Depending on its composition, it is possible to have magnetic steel that can be hardened or non-magnetic steel that cannot be hardened. Its non-rusting qualities are very well suited for use in springs and Fagerhult also makes casings and brackets in stainless steel where suitable.