This specification specifies the classification and classification, technical requirements, quality assurance regulations and delivery preparation of cylindrical spiral compression and tension springs. This specification applies to cylindrical helical compression and tension springs made of Group 70E carbon steel wire, 50CrVA and 65Si2MnWA alloy steel wire.
HB 3-56-2008 Referenced Document
GB/T 1804-2000 General tolerances Tolerances for linear and angular dimensions without individual tolerance indications
GB/T 4358-1995 Corbon spring steel wire for significant use