Mechanical Property density:7.80-7.85g/cm³ surface hardness HRC:≥60 centre Hardness HRC:≥57 Ak:≥12J ball test times:≥10000(10m) as per standard:YB/T 091-2019 and order requirements According to the analysis of service condition of steel balls for large and medium-sized grinding mills at home and abroad, by using grinding steel Jianlong Beiman, the expert team developed wear-resistant steel producing process for the production of large diameter forged steel balls.