ball mill ball 20mm-150mm

　　Characteristics of Goldpro's grinding media steel balls as follows:　　1) Materials, alloy steel　　2) High hardness, 55HRC~65HRC　　3) Good wear resistance, no deformation　　4) Low breakage rate, less than 0.5%　　5) Keeping round, little out-of-round rate　　6) Low unit consumption, 40% reduction compared to unprocessed round steel　　7) Certificates, ISO 9001, SGS, TUV　　8) Good surface quality, no flaw　　9) Good impact resistance，> 12J/ cm2　　10) Strong toughness, anti-deformation　　11) Low breakage rate, more than 15000 times/3.5m　　12) Environmental, no pollution　　13) Dense microstructure , Bainite +Pearlite+Carbide