... WN)socket welding flange(SW)threaded flangelap joint flange(LJF)blind flange(BL)ring joint flange(RJF)long welding neck flange ... neck flange,socket welding flange,threaded flanged,lap joint flange,blind flange,ring joint flange,long welding neck flangefree forgingsbody,body adapter ... composition (C,Mn,P,S,Si,Cu,Ni,Cr,Mo,V,CE)2 Mechanical properties(yeild strength,tensile strength,elongation,reduction ...