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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