M2 is a molybdenum high speed steel,as a standard, it is most widely used industrial HSS.It has small and evenly distributed carbides giving high wear resistance, though its decarburization sensitivity is a little bit high.M2  has superior properties in toughness, wear resistance ,hardness and good machinability. Compared with T1, it is more economic ,its hardness is same as T1 after heat treatment,but its bending strength can reach 4700 MPa, and its toughness and thermo-plasticity are higher than T1 by 50%.