1. Material: Typical materials include 60Si2MnA(SAE 9260), 50CrVA (SAE 6150)and various stainless steel 2. Surface treatment methods of wave spring include bluing, phosphatization, galvanization, electrophoresis, zinc, nickel, silver, golden, tin, copper, 3. Heat treatment: Quenching, and backfire. 4. The specification is available by contacting with us 5. Qualification: ISO9000 6. We can customize disc spring as per customer's requirements. 7. Usage: Widely used in many fields, includes industrial, furniture, automotive, medical devide, electronics, etc. 8. Annual out put: 40, 000, 000PC/year 9. Place of Origin: Yangzhou, China 10. Brand: Sunzo or OEM 11. Delivery time: 10 days. Standard wood box or carton + pallet.