Iron Alloys

Iron Alloys

Typical uses of iron castings include:

  • Certain impellers and volutes
  • Shell liners and lifter bars in grinding mills
  • Gearboxes
  • Pipes
  • Balls and rings 

Types of Iron Castings

Cast Iron alloys contain a carbon content more than 2%. These alloys have a relatively low melting point, generally giving them:

  • Good castability
  • Excellent machinability
  • Good wear resistance
  • Resistance to oxidation

White Cast Iron alloys contain lower levels of carbon. This family of alloys offers:

  • Improved tensile strength
  • High compressive strength and
  • excellent wear resistance
  • good hardness
  • abrasion resistance
  • relatively low cost

Wear-resistant cast iron offers:

  • Resistance to oxidation
  • Resistance to the impacts of high-sulfur flue gas

Wear-resistant cast iron is best used in low stress applications that do not require impact strength.

Alloys for Comparison

High Alloy/Stainless Steels

Stainless steel alloys are high-value alloys that are suitable for many applications

Copper Base/Non-Ferrous Alloys

Copper Base/Non-ferrous Alloys provide good corrosion resistance and high strength

Carbon/Low Alloy Steels

Carbon/low alloy steels are favored for their lower cost, hardenability through heat treatment and alloying elements, and good weldability

Iron Alloys

Iron Alloys

Iron alloys offer good castability and machinability.