Features of spring:

1 Material used for spring:51CrV4,52CrMoV4, 60Si2MnA(9260 or SUP6), 60Si2CrA(9262 or SUP11A), 60Si2CrVA(SUP12), 60Si2CrVAT, 50CrV4(6150 or SUP10), 55CrSi (SAE9254) 
2 High stability for high speed train

3 Infinite life:  1x106  cycles fatigue test

4 Manufaturing standard: EN 13298, TB/T 2211, JIS B2704, UIC 822, DIN 2096, ASTM A125

5 Rolled and ground end

6 Wire diameter could be max.80mm

Features of manufacturer
1 Assigned manufacturer by the Chinese Ministry of Railways for 20 years

2 Certified by ISO 9001 since 2002
3 High automated manufacturing system

4 High capacity production

5 Supplying all kings of springs according to the customer's need