Alloy Inconel 625
Principal Design Features: This nickel-chromium-molybdenum wrought alloy is an excellent general purpose material for elevated temperature use in high strength, oxidation problem applications. It also has excellent corrosion resistance to many acids and resists intergranular attack and stress-corrosion cracking.
Partial List of Applications: The alloy finds use in high temperature applications such as heat exchangers and gas turbine components. Because of its good corrosion resistance it is also used in wet scrubbers and some acid process equipment.
Machinability: May be machined by conventional means. However, the alloy tends to work harden ahead of cutting and rigid tooling is essential to avoid chatter and work hardening in front of the tool edge.
Forming: This alloy can be cold formed by conventional means and tooling. The alloy does work harden during cold working with an attendant increase in strength. This increase in strength may be of value for moderate temperature applications and, in these instances, the formed parts can be left in the cold work hardened condition.
Welding: Welding is readily accomplished using matching alloy filler metal for the conventional welding techniques.
Alloy Inconel 625 Chemistry
| Aluminum | 0.4 max |
| Carbon | 0.1 max |
| Chromium | 20 - 23 |
| Cobalt | 1 max |
| Iron | 5 max |
| Manganese | 0.5 max |
| Molybdenum | 8 - 10 |
| Nickel | Balance |
| Niobium | 3.15 - 4.15 |
| Phosphorus | 0.015 max |
| Silicon | 0.5 max |
| Sulphur | 0.015 max |
| Titanium | 0.4 max |
Alloy Inconel 625 Physical Data
| Density (lb / cu. in.) | 0.305 |
| Specific Heat (Btu/lb/Deg F - [32-212 Deg F]) | 0.107 |
| Melting Point (Deg F) | 2425 |
| Poissons Ratio | 0.312 |
| Thermal Conductivity | 74 |
| Mean Coeff Thermal Expansion | 7.3 |
| Modulus of Elasticity Tension | 29.2 |
| Reduction of Area | 70 |
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