Cobalt alloy 6, also known as Cobalt 6B, is used in many industries and applications, including:
  • Aerospace and oil/gas: Cobalt 6 is commonly used in the aerospace and oil/gas industries for castings such as pumps, valves, and nozzles. 
  • Food processing: Cobalt 6B is used in food processing for industrial scraper blades and knives. 
  • Wastewater treatment: Cobalt 6B is used in wastewater treatment for industrial scraper blades and knives. 
  • Military: Cobalt 6B is used in the military. 
  • Power industry: Cobalt 6B is used in the power industry for turbine blade components and bearing assemblies in heat treat furnaces. 
  • Chemical processing: Cobalt 6B is used in chemical processing for valves. 
Cobalt alloy 6 is a cobalt-chromium and tungsten alloy with a Rockwell Hardness Value of 42 HRC. It has excellent wear and oxidation resistance, a low coefficient of friction, and can withstand high heat temperatures of over 1000°F (540°C).
Typical applications  include chain saw guide blades, furnace fan blades, high temperature bearings, valve stems, food processing equipment and steel mill equipment.
Cobalt 6 alloys are used in a variety of parts, including:
  • Valves: Cobalt 6 alloys are used in valves for steam engines, chemical processing, and power plants 
  • Bearings: Cobalt 6 alloys are used in bearings for heat treat furnaces 
  • Knives: Cobalt 6 alloys are used in industrial knives and scraper blades for food processing, waste water treatment, and textiles 
  • Nozzles: Cobalt 6 alloys are used in nozzles for erosion protection 
  • Pumps: Cobalt 6 alloys are used in pump plungers and pump shafts 
  • Chain saw bars: Cobalt 6 alloys are used in chainsaw bars 
  • Extruder screws: Cobalt 6 alloys are used in extruder screws 
  • Hot oil pump parts: Cobalt 6 alloys are used in hot oil pump parts 
  • Hot trimming dies: Cobalt 6 alloys are used in hot trimming dies 
  • Hot punches: Cobalt 6 alloys are used in hot punches 
Few Key Features
  • Protection from mechanical and chemical degradation over a wide temperature range
  • Saw teeth and acid resistant machine tools.
  • Poppet valves, valve seats and gate valves
  • Pump shafts, impellers, bearings and rolling couples.

Exceptional Wear Resistance

Cobalt Alloy 6 offers superior performance against wear, galling, and corrosion at high temperatures.

Cobalt Alloy 6 Round Bar

Explore our wear-resistant cobalt alloy 6 round bar collection.

Cobalt alloy 6, also known as Stellite 6, has the following chemical composition:

Chemical Composition

  • Cobalt: The balance of the alloy
  • Chromium: 27–32%
  • Tungsten: 4–6%
  • Carbon: 1–2%
  • Nickel: 3–4%
  • Silicon: 1–2%
  • Iron: 3–4% 
Here are some mechanical properties of cobalt alloys:
  • Cobalt Alloy 6B
    Has a tensile strength of 1000 MPa, a yield strength of 621 MPa, an elongation at break of 12%, and a Brinell hardness of 346 

  • Stellite 6
    Has a hardness of 36–45 HRC, a density of 8.44 g/cm, a melting range of 1250–1360°C, and a temperature range where it retains hardness up to 500°C
Cobalt alloy 6, also known as Stellite 6, can be manufactured using a variety of processes, including:
  • Direct laser metal deposition: This additive manufacturing process involves the use of laser power and the focal plane position in the powder stream. 
  • LENS processing: This process can be used to create cobalt-based alloy coatings. 
  • Forging: This process can be used to create cobalt alloy 6 forgings that are customized to meet specific requirements. 
Other processes used to manufacture cobalt alloys include:
  • Melting and processing: This process involves melting wrought cobalt alloys in arc furnaces, refining them, and then hot forging and hot rolling them. 
  • Cold rolling and cold drawing: This process requires many intermediate solution anneals due to the high work hardening rates of cobalt alloys. 
  • Casting: This is one of the methods used to produce cobalt alloys. 
  • Powder metal: This is one of the methods used to produce cobalt alloys. 
  • Hard-faced deposit: This is one of the methods used to produce cobalt alloys. 
Cobalt alloys are a group of super-alloys that are made of cobalt and other elements, such as chromium, molybdenum, and nickel. They are known for their high wear resistance and corrosion performance.