Ferrite (iron)



v • d • e
alloy phases

Austenite (γ-iron; hard)
Bainite
Martensite
Cementite (iron carbide; Fe3C)
Ledeburite (ferrite - cementite eutectic, 4.3% carbon)
Ferrite (α-iron, δ-iron; soft)
Pearlite (88% ferrite, 12% cementite)
Spheroidite

Types of Steel

Plain-carbon steel (up to 2.1% carbon)
Stainless steel (alloy with chromium)
HSLA steel (high strength low alloy)
Tool steel (very hard; heat-treated)

Other Iron-based materials

Cast iron (>2.1% carbon)
Wrought iron (almost no carbon)
Ductile iron

 

Ferrite or alpha iron (α-Fe) is a ferromagnetic material.

It can be considered as pure iron practically (strength = 280N/mm2). Ferrite can be strictly defined as a solid solution of iron in body-centered cubic (BCC) containing a maximum of 0.03% carbon at 723oC and 0.006% carbon at room temperature.

Most "mild" equilibrium at room temperature.

In pure iron, ferrite is stable below 910°C. Above this temperature the melting point at 1539°C, the body-centred cubic crystal structure is again the more stable form of delta-ferrite (δ-Fe).

Only a very small amount of cementite.

See also
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Ferrite_(iron)". A list of authors is available in Wikipedia.