... -0.4, Cr: 0.25MAX.Speciality:High hardness,low breakage,good wear resistance,even wearing.Applied field:Mines,cement ... Cr: 0.4-0.6.Speciality:High hardness,no breakage,good wear resistance,even wearing. Place of OriginShandong, China ... Numberzw7-zw12MaterialSteelquality system authentication:ISO9001:2008material:High /Medium /Low Crdiameter:20mm-150mmcharacter:high hardness,high combined efficiency of ...