Inconel 625* Specification
*Trade name of Special Metals Group of Companies
- W.NR 2.4856
- UNS N06625
- AWS 012
Applicable Standards:
- BS 3076 NA 21
- ASTM B446
- AMS 5666
- NACE MR0175 / ISO 15156-3
A Nickel-Chromium-Molybdenum alloy with excellent corrosion resistance in a wide range of corrosive media, being especially resistant to pitting and crevice corrosion. It is a favourable choice for sea water applications.
| Good Mechanical Properties at Elevated Temperatures | No |
| Corrosion Resistant at Ambient Temperatures | Yes |
| Corrosion Resistant & Good Mechanical Properties at Elevated Temperatures | No |
| Oxidation Resistant | Yes |
| Precipitation Hardenable | No |
Applications include:
- Marine Industries
- Aerospace Industries
- Chemical Processing
- Nuclear Reactors
- Pollution Control
| Approximate Chemical Composition | |
| Ni | 58% min |
| Cr | 20 - 23% |
| Mo | 8 - 10% |
| Nb + Ta | 3.15 - 4.15% |
| Fe | 5% max |
| Properties | ||
| DENSITY | 8.44 g/cm3 | 0.305 lb/in3 |
| MELTING POINT | 1350°C | 2460°F |
| COEFFICIENT OF EXPANSION | 12.8 µm/m °C (20 - 100°C) |
7.1 x 10-6 in/in
°F (70 - 212°F) |
| MODULUS OF RIGIDITY | 79 kN/mm2 | 11458 ksi |
| MODULUS OF ELASTICITY | 205.8 kN/mm2 | 29849 ksi |
| CONDITION OF SUPPLY | HEAT TREATMENT (AFTER FORMING) |
| Annealed/Spring Temper | Stress relieve at 260 - 370°C (500 - 700°F) for 30 - 60 minutes and air cool. |
| CONDITION | APPROX TENSILE STRENGTH | APPROX SERVICE TEMPERATURE | ||
| Annealed | 800 - 1000 N/mm2 | 116 - 145 ksi | -200 to +340°C | -330 to +645°F |
| Spring Temper | 1300 - 1600 N/mm2 | 189 - 232 ksi | up to +200°C | up to +395°F |
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