Alloy 925 is an age-hardenable nickel-iron-chromium alloy that combines good high strength properties and excellent corrosion resistance. The addition of molybdenum and copper gives the alloy resistance to reducing chemicals, and to pitting and crevice corrosion. The high chromium content provides resistance to oxidizing conditions, while the nickel protects the alloy from chloride ion stress corrosion cracking. The alloy is made age-hardenable by the addition of aluminum and titanium.
This alloy is often chosen for liquid and gaseous applications where a combination of high strength and corrosion resistance is required. Alloy 925 provides excellent resistance to corrosion cracking caused by hydrogen sulfide in sour gas applications. Applications include down-hole and above ground components.
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Nickel Alloy 925 Chemical Composition
Chemical Composition (wt%) limits *
| Carbon | 0.03 | Manganese | 1.0 |
| Chromium | 19.5-22.5 | Silicon | 0.5 |
| Nickel | 42.0-46.0 | Copper | 1.5-3.0 |
| Iron | 22.0 min | Niobium | 0.5 |
| Molybdenum | 2.5-3.5 | Aluminum | 0.1-0.5 |
| Titanium | 1.9-2.4 | Sulfur | 0.03 |
*Maximum, unless range is indicated
Nickel Alloy 925 Physical Properties
| Density, lb/in3 | 0.292 |
| Modulus of Elasticity, psi | 29.8 x 106 |
| Coefficient of Thermal Expansion, 68-212˚F, /˚F | 7.8 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 6.4 |
| Specific Heat, Btu/lb ˚F | 0.10 |
| Electrical Resistivity, Microhm-in | 46.1 |
Nickel Alloy 925 Mechanical Properties
Mechanical properties of solution annealed and aged Alloy 925. Solution anneal at 1,800-1,900°F for 1 hour. Age harden at 1,365-1,380°F.
| Yield Strength, min. (ksi) | 120 |
| Tensile Strength, min. (ksi) | 170 |
| Elongation, min. (%) | 25 |
| Hardness, HRc | 32 |
Nickel Alloy 925 Standards
| NACE MRO175 |
Your Source for Nickel Alloy 925
At Double Eagle Alloys, we supply Nickel Alloy 925 in long bar and header plugs engineered for these demanding services. Contact our team to learn how Nickel Alloy 925 can support long-term performance and reliability.
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Data shown are typical and provided for informational purposes only. Values should not be considered minimums or maximums for specification or final design. Actual product data may vary, and information may be revised without notice.