... circular forging1,min OD around 400mm2,weight of single piece between 50kg and 5t3,plane vertical height(the ... forging 1,min OD around 150mm2,weight of single piece between 50kg and 5t3,height within 2000mmsteel bar forging1 ... "Classification Society".5,we usualy use material of steel type of 15#,20#,25#,30#.35#,40#,45 ... clear requirements we can render excellent heat treatment. steel-forged-shaft