This standard specifies the terminology, symbols, calculation formulas and technical requirements for Class II cylindrical compression springs made of cold-drawn steel wire with circular cross-section. This standard applies to cylindrical spiral compression springs made of carbon steel 70E or alloy steel 50CrVA and 65Si2MnWA circular cross-section cold drawn steel wire.
HB 3-53-2008 Referenced Document
GB/T 4358-1995 Corbon spring steel wire for significant use