Heat Treating Cast Iron

Cast iron has plenty of carbon available and is easy to heat treat.

Both gray and ductile cast iron does not have to be carburized prior to heat treating because it is made up of at least 2.5% carbon.

Iron and steel grow when heat treated because of the volume change in the atomic structure.

Ferritizing (for the most ductile microstructure) is done by austenitizing at 900°C, followed by holding at 700°C to completely transform austenite to ferrite and graphite.

See also: Cast Iron, Heat Treatment.

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Subjects: Materials