Inconel 718 Heat Treatment is critical for developing its exceptional strength and corrosion resistance. The alloy is precipitation hardenable, meaning its mechanical properties are greatly enhanced by controlled heat treatment processes.
🔥 Common Heat Treatment Procedures for Inconel 718
| Heat Treatment Type | Process Details |
|---|---|
| Solution Annealing | 925–980°C (1700–1800°F), hold for 1 hour, air cool or faster |
| Age Hardening (Precipitation) | After solution anneal: – 720°C (1328°F) for 8 hours → cool to 620°C (1148°F) and hold for 8 more hours → air cool |
| Double Aging (optional) | For additional strength: intermediate holding at ~650–700°C |
🔧 Purpose of Heat Treatment in Inconel 718
Solution Annealing: Dissolves carbides and intermetallic phases to restore a uniform structure.
Age Hardening: Precipitates gamma prime (γ') and gamma double prime (γ″) phases, significantly boosting strength, hardness, and creep resistance.
⚙️ Key Benefits After Proper Heat Treatment
Ultimate tensile strength > 1,300 MPa
Excellent fatigue resistance
Retains mechanical integrity up to 700°C
Ideal for aerospace, turbine, and nuclear applications
If you're sourcing heat-treated Inconel 718 bars, bolts, or components, SSM can supply them to your exact condition (annealed, aged, or solution-treated), complete with certification.
