Tedrail supply the various kinds of friction wedges for the freight wagon bogies, material could be:
Casting Alloy Steel: AISI 1340, heat treated as QT
Grey Casting Iron:HT250,GG-25
Austempered Ductile Iron(ADI)
Main Wedge Type:
Iron wedge | LifeGuard wedge | TwinGuard wedge | Iron Split wedge |