Midway Corporation

CAST IRON

Gray Cast Iron

Gray iron is a hard brittle material with excellent damping characteristics and good machinability. This is due to graphite flakes which precipitate into the iron during solidification. Gray iron is a great thermal conductor with great wear resistance that absorbs vibration. Common applications are bushings, gears, pulleys and rollers.

Easy-To-Machine Gray
Cast Iron

  • Hardness: Rockwell C22 but can be hardened up to C50
  • Thickness & width tolerances: +0.250"
  • Meets ASTM: A247

Shapes Available

  • Rectangular Bars - oversized unpolished
  • Rods - oversized unpolished & tight-tolerance unpolished
  • Tubes - oversized unpolished

Ductile Cast Iron

Ductile Iron is a unique alloy that is similar to gray iron except that it is not brittle and is able to flex with more fatigue resistance than gray iron. These properties are a result of creating graphite nodules instead of graphite flakes during solidification. Ductile iron is light and absorbs vibration.

Impact-Resistant Ductile
Cast Iron

  • Yield strength: 55,000 psi
  • Hardness: Rockwell C20 but can be hardened up to C60
  • Meets ASTM:A536

Shapes Available

  • Rectangular Bars - oversized unpolished
  • Rods - oversized unpolished