What is Gray Iron?
Gray Iron is by far the oldest and most common form of cast iron. As a result, it is assumed by many to be the only form of cast iron and the terms "cast iron" and "gray iron" are used interchangeably. Gray Iron, named because its fracture has a gray appearance, consists of flake graphite in a matrix consisting of ferrite, pearlite or a mixture of the two.
The fluidity of liquid gray iron, and its expansion during solidification due to the formation of graphite, have made this metal ideal for the economical production of castings in a variety of industries. Many engineers design castings using Gray Iron due to its excellent machinability,dampening characteristics and self-lubricating properties.
MTI Gray Iron Production
Metal Technologies currently has the capacity to produce 293,840 tons of gray iron castings per year. Casting sizes range from 1 lb to 80 lbs. MTI foundries produce several gray iron classes, including G1800, G2500, G3000, G3500, G4000 and other similar grades.
|
 |
Information on Gray Iron provided in part by the Ductile Iron Society Website. Further information is available on the Iron Casting Research Institute website.
Gray Iron Capacity:
293,840 tons
Casting Sizes:
1 to 80 Lbs
Gray Iron Classes:
SAE J431 G1800, G2500, G3000, G3500, G4000 and other similar grades
Microstructure of Gray Iron, unetched: 100X
Microstructure of Gray Iron, nital etched: 100X
|