Inconel 625
UNS N06625
Overview
The workhorse nickel-chromium-molybdenum alloy. Outstanding resistance to a wide range of corrosive environments combined with high strength up to 980°C. The addition of niobium provides excellent fatigue and thermal-fatigue strength. Widely used in aerospace, marine, nuclear, and chemical processing — wherever both strength and corrosion resistance are critical.
Chemical Composition (wt%)
| Element | Min | Max |
|---|---|---|
| Ni (Nickel) | 58 | — |
| Cr (Chromium) | 20 | 23 |
| Mo (Molybdenum) | 8 | 10 |
| Nb (Niobium) | 3.15 | 4.15 |
| Fe (Iron) | — | 5 |
| C (Carbon) | — | 0.1 |
| Mn (Manganese) | — | 0.5 |
| Si (Silicon) | — | 0.5 |
Mechanical Properties
| Property | Value | Condition |
|---|---|---|
| Tensile Strength | ≥ 827 MPa (120 ksi) | — |
| Yield Strength (0.2%) | ≥ 414 MPa (60 ksi) | — |
| Elongation | ≥ 30% | — |
| Hardness | ≤ 25 HRC | annealed |
| Density | 8.44 g/cm³ | — |
Physical Properties
| Property | Value |
|---|---|
| Melting Range | 1290 – 1350 °C |
| Thermal Conductivity | 9.8 W/m·K (at 23°C) |
| Max Service Temp | 980°C |
Corrosion Resistance
Exceptional resistance to pitting and crevice corrosion in chloride environments (PREN > 45). Resistant to a wide range of organic and inorganic acids including sulfuric, hydrochloric, phosphoric, and nitric. Excellent performance in seawater at all temperatures and velocities. Resistant to caustic alkalis and stress corrosion cracking.
Typical Applications
Related Standards
Available Products in This Material
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