Template:Steels

Iron-carbon alloy phases
Ferrite Allotropes of ferrite include: α-iron (Alpha ferrite) δ-iron {Delta ferrite) β-iron (Beta ferrite) ε-iron (Hexaferrum) γ-iron (Gamma ferrite) Austenite (γ-iron + carbon in solid solution) Cementite (iron carbide, Fe3C) Graphite
Microstructures
Spheroidite Pearlite (88% ferrite, 12% cementite) Bainite Martensite Ledeburite (austenite-cementite eutectic, 4.3% carbon)
Steel classes
Crucible steel Carbon steel (≤2.1% carbon; low alloy) Spring steel (low or no alloy) Alloy steel (contains non-carbon elements) Maraging steel (contains nickel) Stainless steel (contains ≥10.5% chromium) Weathering steel Tool steel (alloy steel for tools)
Other iron-based materials
Cast iron (>2.1% carbon) Ductile iron Gray iron Malleable iron White iron Wrought iron (contains slag)