... by our customers. HF-A: diameter: 60-200MM, length :3-10M,hardness :45-65 chemical elements: C: 0.52-0.7 ... .035, Cr: <0.04HF-B: diameter: 60-200MM, length :3-10M,hardness :45-65 chemical elements: C: 0.72-0.82 ... , P: 0.035,MAX Cr: 0.28-0.60 3-10M CEMENT PLANT CAST IRON GEINDING MEDIA ROD