stellite
U.S. Ordnance Stellite Lined Barrels
Using the highest quality materials for reliability and longevity, we have included the capability to Stellite line our barrels. Our goal is to find solutions to increase reliability for our customers when they need it most and the Stellite alloy brings that extra reliability. The Stellite liner extends the life of the barrel by reducing the effects of wear. The effects of wear result in inaccurate or inconsistent bullets on target, or failure, thus resulting in an unreliable barrel.
Properties
Machining
Lined Barrels
Hardness and Toughness of Stellite alloys is astonishing. It is also very resistant to corrosion and is completely non-magnetic. Stellite alloys also tend to have extremely high melting points due to the cobalt and chromium content. Stellite Alloy is designed for wear resistance, and that's why we use it. A stellite-lined barrel has a service life of 18,000 rounds whereas a chromed-plated barrel has a service life of 10,000. (Source FNH USA Website). Stellite alloy consists of a range of cobalt-chromium alloys, it may also contain tungsten or molybdenum and a small but important amount of carbon.
Stellite alloys are so hard that they are very difficult to machine. Typically, a Stellite part is precisely cast so that only minimal machining is necessary. Stellite is more often machined by grinding off material, rather than by cutting.
U.S. Ordnance has the capability to line the barrels for the following weapon systems:
  • M2 Systems
  • M60/Mk43 systems
  • M240 Systems