Alloy Information Report for AISI 1018

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General Characteristics of AISI 1018

AISI 1018 is a high-manganese carbon alloy that offers better machinability than other, lower carbon steels. AISI 1018 also offers improved hardenability and strength in carburized and uncarburized applications.

Chemical Composition of AISI 1018

• Carbon 0.15-0.20
• Manganese 0.60-0.90
• Phosphorus 0.040 max
• Sulfur 0.050 max
• Silicon 0.15 to 0.30, or:
• 0.10 max
• 0.10-0.20
• 0.20-0.40
• 0.30-0.60
• Iron balance

Heat Treatment of AISI 1018

• Normalize at 1625° to 1700°F (885° to 927°C) before air cooling
• Full anneal at 1575° to 1700°C (857°C to 927°C) before furnace cooling
• Process anneal at 1100° to 1225°F (593° to 663°C) after cold working
• Harden
• Not carburized
  • Heat to 1575° to 1625°F (857° to 885°C) before water quenching
• Carburized
  • Achieve carburizing temperature
  • Oil quench or slow cool
  • Reheat to 1450° to 1575°F (788° to 857°C)
  • Oil quench
• Can be case hardened

Applications of AISI 1018

• Carburized components
• Machinery parts
• Wires
• Sprocket and chain assemblies
• Cold extrusions
• Explosive forming tools
• Dies
• Bolts
• Rods

Machinability of AISI 1018

• Readily machined
  • Annealed
  • Normalized
  • Cold-drawn
  • Quenched, tempered
• Good surface finish may be compromised from tearing when annealed and normalized

Workability of AISI 1018

• Hot roll or forge from 1800° to 2300°F (982° to 1260°C)
• Intermediate annealing required for substantial cold work
• Fully anneal when further cold work will follow extensive cold work

To Send a Request for Quote for AISI 1018, please Click Here, or call 1.973.276.5000 or fax 1.973.276.5050.