Material�steel Surface Hardness�HRC58-65 Chemical elements�C Si Mn P S Cr Mo Ni Cu Breif Description: 1. Size: Φ20mm-150mm 2. Material: high/medium/low chrome alloyed Low Chrome: Cr=1-3%,Medium Chrome: Cr=3-9%High Chrome: 15-23% Super High Chrome: Cr=10-13% 3. Characteristics: high hardness, good wear resistant, low breakage, no deformation. 4. Hardness: 45-65HRC; Breakage rate �1%; Drop times�10,000.00 5. Application: cement, metallurgy, mining, electric power, chemical and magnets industries. Inspection: SGS/BV/TUV Origin: Shandong Province, China