... NameMain ProductsMaterialPart of Technical RequirementJiangsu Pengfei Group Co.,Ltd.Support roller, kiln tyre, girth gearZG35CrMo, ... ZG42CrMoUltrasonic test Grade 3Jiangsu Haijian Stock Co.,Ltd.Support roller,kiln tyre,girth gearZG35CrMo,ZG42CrMoUltrasonic ... pressure test max 52.5MpaYancheng Sanyi Petrochemical Machinery Co.,Ltd.Bop shell,cylinder head,ZG25CrNiMo,ZG30CrMoUltrasonic ...