STELLITE ALLOY 21

Characteristics.

  • Alloys composed of different proportions of cobalt, nickel, iron, aluminum, boron, carbon, chromium, manganese, molybdenum, phosphorus, sulfur, silicon, and titanium. 
  •  There are different grades and most of the alloys get to have from 4 to 6 of these elements. 
  • It’s a hard coating alloy created to enhanced resistance to metal wearing.
  • Resistant to rust, abrasion, and corrosion.
  • Used in different applications: machinery parts resistant to acids, lathe tool fabrication, pump sleeves, rotary seal rings, saw blades, turbine blades, etc.

Shape or Presentation

  • Bar
  • Welding wire
  • Powder
  • Electrods
  • Cast parts, etc.

Chemical Composition %

  • Co
  • Ni
  • Fe
  • C
  • Cr
  • Mn
  • Si
  • Mo



  • Balance
  • 2.5
  • 3 max
  • 0.25
  • 27
  • 1
  • 1.5
  • 5.5

Stellite Alloy 21

  • Resistant to rust and reducing atmospheres up to 2100°F.
  • Excellent resistance at high temperatures.

  *Stellite is a registered brand from Deloro Stellite Company.