... custumers’ requirements.The main technical parameters of gear1.Standard of materials: GB/T3077-19992.The grade of materials: 45, 20Cr, 40Cr , ... 35Cr Mo , 42Cr Mo, 20CrMnMo, 20CrMnTi, 17CrNiMo6, 20CrNi2Mo3.Standard of pruduction: ISO1328-19954.Smelting method: electric arc furnace + refining furnace5 ... .Parking: wood package for shipping (see below)2.Flow chart of hard gear production Hardened gear