Lamineries MATTHEY SA proposes a special version of the 1.4310: the 1.4310.4. Its chemical composition has been adapted in order to increase the reaction to work hardening (Ni content between 6.4 and 6.6%). 1.4310.4 is also specially cast in order to avoid unwanted inclusions. Its austenitic structure is unstable and a high mechanical strength can be reached, using a significantly weaker rate of cold deformation than is the case for the conventional 1.4310. The stainless 1.4310.4 also offers an improved fatigue strength limit as well as a higher increase of the tensile strength after tempering than with the conventional 1.4310. These properties make the 1.4310.4 highly suitable for demanding spring applications such as the manufacture of snap domes.

Typical uses
Often used for the manufacture of springs and other products requiring a good fatigue resistance such as switches, watch and clock components, snap domes, etc.