There are provided a method for producing a steel seamless steel pipe including: a billet molding step; a first heating step; a hot isostatic extrusion step; a second heating step; an extension step; a third heating step; and a pickling step.
申请公布号
EP2703097(A1)
申请公布日期
2014.03.05
申请号
EP20130191278
申请日期
2007.03.14
申请人
SHINKO METAL PRODUCTS CO., LTD.;NHK SPRING CO., LTD.