A seamless rolled ring for a marine propulsion shaft coupling — 4140 alloy, rolled to a heavier section than the tower-flange example above, sized for the torsional load a main propulsion shaft coupling carries in continuous service.

A large seamless rolled ring for a wind turbine tower section flange — 3.4m OD in 1045 carbon steel, pierced and expanded on a ring mill to give the continuous circumferential grain flow a bolted tower flange under cyclic wind loading benefits from.