Inconel 617 (Ni-22Cr-12Co-9Mo) annealed vs Inconel 625
Property comparison of Inconel 617 (Ni-22Cr-12Co-9Mo) annealed and Inconel 625, both nickel alloy.
| Property | Inconel 617 (Ni-22Cr-12Co-9Mo) annealed | Inconel 625 | Difference |
|---|---|---|---|
| Yield strength | 330 MPa | 448 MPa | +36% |
| Tensile strength | 740 MPa | 862 MPa | +16% |
| Elongation | 55 % | 50 % | -9% |
| Elastic modulus | 211,000 MPa | 207,500 MPa | -2% |
| Density | 8,360 kg/m³ | 8,440 kg/m³ | +1% |
| Brinell hardness | 170 HB | 200 HB | +18% |
| Thermal conductivity | 13.4 W/m·K | 10.8 W/m·K | -19% |
| Specific heat | 419 J/kg·K | 427 J/kg·K | +2% |
| Coefficient of thermal expansion | 0.000013 1/K | 0.000013 1/K | 0% |
| Melting point | 1,380 °C | 1,350 °C | -2% |
Difference is Inconel 625 relative to Inconel 617 (Ni-22Cr-12Co-9Mo) annealed. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- grade
- N06617
- standard
- Special Metals Corp. tech bulletin INCONEL alloy 617 (SMC-029)
- heat treatment
- solution-annealed
- grade
- N06625
- standard
- Special Metals Corp. tech bulletin INCONEL alloy 625 (SMC-063)
- heat treatment
- annealed
About Inconel nickel-chromium superalloys
Inconel is a family of nickel-chromium-iron superalloys. They keep strength at temperatures where steels and most stainless grades have failed and resist oxidation and hot corrosion. Inconel 718 is the most widely used grade for aerospace turbine disks and high-temperature fasteners; Inconel 625 is the choice when chloride and reducing-acid corrosion both matter.
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