Steel Grade steel Standard AISI, ASTM, DIN, GB, JIS Dimensions Dia: 20-400mm It is widely used for vaired cutters and cold work mole with wearproof. M2 high speed steel round bar (1.3343 )1.Chemical composition: C:0.85, Si:0.38, Mn:0.35, P≤0.030, S≤0.030, Cr:4.10, W:6.00, Mo:4.80, V:1.852.Annealed Hardness:255, Hardening:1210~1230 , Tempering 550, HRC Secondary hardness 63-35.3.Size: For round ...