Advanced Barrel Technology Chromium Cobalt Alloy
U.S. Ordnance Chromium Cobalt Alloy Lined Barrels
Our goal is to find solutions that increase product reliability, accuracy and longevity, specifically for demanding situations when our customers need it most. Along with using the highest quality materials and advanced barrel technology to accomplish this goal, we have built a chromium cobalt alloy line to enhance our barrels. Barrels with chromium cobalt alloy have shown an extended barrel life by reducing the effects of wear. The effects of wear result in inaccurate or inconsistent bullets on target, or failure, thus creating an unreliable barrel.
Hardness and Toughness of Chromium Cobalt Alloy is astonishing. It is also very resistant to corrosion and is completely non-magnetic. Chromium Cobalt Alloy also tend to have extremely high melting points due to the cobalt and chromium content. Chromium Cobalt Alloyy is designed for wear resistance, and that's why we use it. A Chromium Cobalt Alloy 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). Chromium Cobalt Alloy consists of a range of cobalt-chromium alloys, it may also contain tungsten or molybdenum and a small but important amount of carbon.
Chromium Cobalt Alloy alloys are so hard that they are very difficult to machine. Typically, a Chromium Cobalt Alloy part is precisely cast so that only minimal machining is necessary. Chromium Cobalt Alloy 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