Y Ball Valve For Graphite Mine Professional

Forged steel grinding ball has high hardness surface hardness to 5865hrc, volume hardness of 5764hrc impact toughness high impact toughness more than 12j cm2roken rate is low the actual broken rate is not higher than 0oss of forged grinding ball round rate is lowropping test in 8m high tester for more than 20,000 times.