Sandvik Springflex is Sandvik's trademark for a duplex stainless steel for use in spring applications. The grade is characterized by high tensile strength and very good relaxation resistance combined with high resistance to fatigue and corrosion.
There is also a version of Sandvik Springflex with even higher tensile strength called Sandvik Springflex SH.
Read more about Sandvik Springflex and Sandvik Springflex SH
Round spring wire and flat spring wire in an extensive program of stainless steels and nickel alloys.