... vaired cutters and cold work mole with wearproof. M2 high speed steel round bar (1.3343 )1.Chemical composition: ... ≤0.030, S≤0.030, Cr:4.10, W:6.00, Mo:4.80, V:1.852.Annealed Hardness:255, Hardening ... ≤0.030, S≤0.030, Cr:4.10, W:6.00, Mo:4.80, V:1.852.Annealed Hardness:255, ... per your concrete requirement.4.Milling Test Certification and UT test is workable for you. M2 high speed steel round bar