... Our company has the ability to forge, quench and temper, process, surfuce quench and carbonize high precision soft/ hard-surfaced ... 20Cr, 40Cr , 35Cr Mo , 42Cr Mo, 20CrMnMo, 20CrMnTi, 17CrNiMo6, 20CrNi2Mo3.Standard of pruduction: ISO1328-19954.Smelting method: electric arc furnace + refining furnace5 ... .1.Parking: wood package for shipping (see below)2.Flow chart of hard gear production Hardened gear