... T1,T2,T3,T4.Machine type:Excavator, Loader,Bulldozer,etc.For machines: Komatsu, ESCO,JCB,Hyundai,Daewoo,Hitach,etcHeat treatment: Quenching and ... condition: with excellent elongation and tensile strength, so very suitable for many different hard working conditions. Products pictures: Factory pictures: