diameter: 100mm---5000mm weight:50kg---7000kg c45,c15 ,c60,c65,40Cr ,40CrNiMo,4Cr13,20CrMnTi,16Mn,42/35/20CrM You ... forging products 1) Outside Diameter:100mm--5000mm2)Material c45,c15 ,c60,c65,40Cr ,40CrNiMo,4Cr13,20CrMnTi,16Mn,42/35/20CrMo...etc3 ...