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Alloy L605, also called HAYNES® 25 and Cobalt L-605, is a solid solution, cobalt-nickel-chromium-tungsten alloy that is useful for continuous service to 1800°F (980°C). L605 is the strongest of the fabricable cobalt alloys and has been the subject of many investigations to determine its properties over a wide of conditions because of its long and widespread use. Alloy L605 exhibits a loss of room temperature ductility in much the same way as other superalloys, such as alloy X or alloy 625, when exposed for prolonged temperatures at intermediate temperatures.

L605 Features

  • Excellent resistance to sulfidation
  • High temperature strength
  • Resistance to wear and galling
  • Great ductility, forming & welding characteristics

Alloy L605 Aerospace Applications

L605 has given good service in many jet engine parts and gas turbine engine components such as combustion chambers and afterburners. Other aerospace applications include:

  • Turbine blades & rings
  • High temperature ball bearings and bearing races
  • Springs
  • Heart valves

L605 Welding

Haynes 25 can be welded in the following methods:

  • Shielded metal-arc
  • Gas tungsten-arc (TIG)
  • Gas metal-arc (MIG) methods
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