If you need immediate assistance, please contact us at+8617773160488sales@evernickel.com
If you need immediate assistance, please contact us at+8617773160488sales@evernickel.com
Nickel-based superalloys are widely used in industries that require high temperature strength, corrosion resistance, and structural reliability. Among them, Inconel 625 and Inconel 718 are two of the most commonly used materials in aerospace, oil & gas, and power generation.
Although both alloys belong to the Inconel family, they differ significantly in strengthening mechanism, mechanical properties, and application fields.
Inconel 625 is a solid-solution strengthened nickel-chromium alloy designed for excellent corrosion resistance and oxidation resistance.
| Element | Content |
|---|---|
| Nickel (Ni) | ≥58% |
| Chromium (Cr) | 20–23% |
| Molybdenum (Mo) | 8–10% |
| Niobium (Nb) | 3.15–4.15% |
Outstanding corrosion resistance
Excellent oxidation resistance
High fatigue strength
Excellent weldability
Marine engineering equipment
Chemical processing plants
Nuclear industry components
Aircraft exhaust systems
Inconel 718 is a precipitation-hardened nickel-based superalloy designed for extremely high strength at elevated temperatures.
| Element | Content |
|---|---|
| Nickel (Ni) | 50–55% |
| Chromium (Cr) | 17–21% |
| Niobium (Nb) | 4.75–5.5% |
| Molybdenum (Mo) | 2.8–3.3% |
Exceptional high-temperature strength
Excellent creep resistance
Superior fatigue resistance
Heat-treatable for improved mechanical properties
Aircraft turbine disks
Rocket engines
Oil drilling tools
Gas turbine components
| Property | Inconel 625 | Inconel 718 |
|---|---|---|
| Strengthening Mechanism | Solid solution | Precipitation hardening |
| High Temperature Strength | Moderate | Very high |
| Corrosion Resistance | Excellent | Good |
| Weldability | Excellent | Good |
| Maximum Service Temperature | ~980°C | ~700°C |
Choosing between Inconel 625 and Inconel 718 depends on application requirements.
Choose Inconel 625 if:
Corrosion resistance is the priority
Marine or chemical environments are involved
Excellent weldability is required
Choose Inconel 718 if:
High mechanical strength is required
The component operates under high stress
Aerospace or turbine applications are involved
Both Inconel 625 and Inconel 718 are high-performance nickel alloys, but their strengths differ.
Inconel 625: superior corrosion resistance
Inconel 718: superior high-temperature strength
Selecting the right alloy ensures better performance, longer service life, and improved reliability in demanding industrial environments.
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