... Round bar H13, M2, W4. Annealed or Ground high speed steel Hot-rolled Round barSpecification: Diameter 8mm---32mm Length 2000----4500mmApplication: ... Composition: C 0.74, Si 1.10, Mn 0.45, P≤0.030, S≤0.030, Cr 7.10, W ≤ ... : C 0.39, Si 1.10, Mn 0.30, P≤0.028, S≤0.020, Cr 5.10, W ≤ ... C 0.85, Si 0.38, Mn 0.35, P≤0.030, S≤0.030, Cr 4.10, W 6 ... C 0.83, Si 0.35, Mn 0.35, P≤0.030, S≤0.030, Cr 4.05, W 8 ...