Type stainless steel strip is particularly well suited for the manufacture of high strength room temperature springs. When stainless steel strip is tempered to high strength levels it maintains its ductility with or without stress relieving. Traditional UNS stainless is used for most applications while Si UNS , with an increased Silicon content, is used for "super" high strength spring applications. Standard has a silicon content of 1. The extra silicon allows for good ductility at higher tensile strength.
European standards now cover both strip and wire products for springs. Both standards use the European steel grade number system, most of which are also shown in BSEN It contains 10 grades, one ferritic, three martensitics, one precipitation hardening and five austenitic. With the exception of austenitic grade 1. The composition of grade 1. BSEN grade 1. Grades 1.
Hardened and tempered steel strip with different microstructures
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