Springsare the main part of the bogie suspension,also used for draft gear absorb and other functional product.Spring types contain Helical Coil Spring ,Compression Spring,Volute Spring and Leaf Spring.
Spring material standard:
》DIN 17221
> Silico – Manganese Steel 38Si7 ,54SiCr6 ,60SiCr7
> Chrome - Vanadium Steel 55Cr3, 50CrV4 ,51CrMoV4
》BS EN 10089
> Silico - Manganese Steel: 46Si7 , 56Si7 , 54SiCr6, 61SiCr7
> Chrome - Vanadium Steel: 51CrV4 , 52CrMoV4, 60CrMo3-1
》JIS G4801
> Silico - Manganese Steel: SUP 6, SUP 7, SUP 9, SUP 9A
> Chrome - Vanadium Steel: SUP 10, SUP 11 A, SUP 12, SUP 13
》ASTM A689