Inconel™ 702

General Characteristics of Inconel™ 702

Inconel™ 702 provides exceptional oxidation resistance from 2000° to 2400°F (1093° to 1316°C), though high-heat sulfur atmospheres should be avoided. This nickel-chromium alloy offers moderate strength ideal for combustion applications.

Chemical Composition of Inconel™ 702

  • Carbon 0.1 max
  • Manganese 1.0 max
  • Iron 2.0 max
  • Titanium 0.25-1.0
  • Aluminum 2.75-3.75
  • Chromium 14.0-17.0
  • Nickel remainder

Heat Treatment of Inconel™ 702

  • Anneal by holding from 1900° to 1950°F (1038° to 1066°C) for 15 to 30 minutes, then air cooling rapidly
  • Harden by holding at 1400°F (760°C) for 5 hours; air cool

Applications of Inconel™ 702

  • Jet engine combustion liners and transition pieces that move hot gas

Machinability of Inconel™ 702

  • Best when not age hardened
  • For production machining, hot roll, as roll, or hot roll and anneal
  • Hot-rolled and as-rolled material cuts cleaner than annealed metal
  • Use high-speed steel, cast non-ferrous and cemented carbide cutting tools
  • Lubricate with rich emulsions of plain soluble oil and water, chemically active water-soluble oil, or chlorinated, sulfurized fatty mineral or sperm oil for cutting
  • Remove all lubricants and residue after machining

Workability of Inconel™ 702

  • 2200°F (1204°C) for hot working
  • Form by hot and cold bending, rolling and cold drawing
  • 65% reduction between anneals

Corrosion Resistance of Inconel™ 702

  • Resists oxidation to 2400°F (1316°C)
  • May corrode in sulfur atmospheres and other corrosive atmospheres at 1700°F (927°C)
  • Avoid high-heat sulfur atmospheres
  • Avoid reducing atmospheres

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