Template:Steels

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Iron 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

Carbon steel (≤2.1% carbon; low alloy)
Stainless steel (steel with chromium)
HSLA steel (high strength low alloy)
Tool steel (very hard)
Other iron-based materials

Cast iron (>2.1% carbon)
Wrought iron (contains slag)
Ductile iron