General Introduction: Spring steel wires can be oil hardened and tampered spring steel wire, bright spring steel wire and carbon spring steel wires. Wire Materials: Steel 65MN, 60Si2MnA, 55CrSi, 50CrV, T2B. Wire Diameter: 4.0 - 17.0mm. Application: For car suspending spring, motorcycle vibration reducing spring, engine door spring and high strength, high flexibility and high weary life spring. Production Standard: Our spring steel wires meet the following standards: ASTM A401,ASTM A401M,EN 10270-2, or according to the user's technical qualification. Packing: In coils of certain weight according to customers' requirements