Product description Quick detail Place of origin: china Brand name: guoyang Material: steel Surface hardness: over 58 hrc Product feature Characteristics: high hardness, good wear resistance, no breakage, no deformation, good quality, reasonable price Product specification/models Diameter:10, 12.7, 15, 20, 25, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 125, 130(mm) Chemical composition: Popuar grade Item:zqcr10 C(1.8-3.2), si(0.3-1.2), mn(0.2-1.0), cr(10-13), p(less than 0.1), s(less than 0.08) High chromium cast grinding balls Item:zqcr26, zqcr20, zqcr17 Chemical composition: C(2.0-3.2), si(less than 1), mn(0.2-1), cr(22-28)&(18-22)&(13-18), mo p s(trace) Propertis and microstructure: Hardness(over 58 hrc) Impact value(over 4j/cm²) Times of falling balls (over 18000) Application Application: cement, metallurgy, mine, construction material, water coal slurry Other information Packaging & delivery Dia 10