For various kinds of railway bogie Fatigue life can reach 3 million time Excellent material characteristics DIN/ASTM standard Technical ... : 60Si2Mn, 60Si2MnA, 60Si2CrVA, and 60Si2CrVAT3.Usage:bogie of K2,K4,K8,Y25 with axle load of 21t,22.5t, 25t etc.4.Certifications ... wheels&wheelset,which reduce cost for buyers.4.Multiple choice of export: we have business connection with manufacturer all over China ...