Incoloy 925 Nickel Alloy Bar (UNS N09925)
Incoloy 925 is a precipitation-hardenable nickel-iron-chromium alloy engineered for applications requiring an optimal balance of high strength, corrosion resistance, and stress cracking resistance. The alloy is enhanced with aluminum and titanium for age-hardening, while copper and molybdenum significantly improve its resistance to corrosive environments, including sour gas and chloride-rich conditions.
Key Properties & Metallurgical Advantages
Precipitation Hardening – Achieves high strength through heat treatment (aging) due to titanium and aluminum additions.
Superior Corrosion Resistance –
- Molybdenum & Copper – Resist reducing acids, pitting, and crevice corrosion.
- Chromium – Provides excellent resistance to oxidizing environments.
- Nickel Content – Prevents chloride-ion stress-corrosion cracking (SCC).
High Mechanical Strength – Maintains structural integrity in extreme conditions.
Sulfide Stress Cracking (SSC) Resistance – Performs reliably in sour gas and oilfield environments.
Why Choose Incoloy 925 Alloy Bar?
- Exceptional Strength-to-Corrosion Ratio – Ideal for sour service and harsh chemical exposure.
- Heat-Treatable for Enhanced Hardness – Can be age-hardened for demanding mechanical applications.
- Proven Performance in Sour Gas Wells – Resists sulfide stress cracking (SSC) and stress-corrosion cracking (SCC).
Chemical Composition
|
Elements |
Content (%) |
|
Nickel, Ni |
44 |
|
Iron, Fe |
28 |
|
Chromium, Cr |
21 |
|
Molybdenum, Mo |
3 |
|
Titanium, Ti |
2.1 |
|
Copper, Cu |
1.8 |
|
Aluminum, Al |
0.3 |
|
Carbon, C |
0.01 |
Physical Properties
|
Properties |
Metric |
Imperial |
|
Density |
8.05 g/cm³ |
0.291 lb/in³ |
|
Melting point |
1343°C |
2450°F |
Mechanical Properties
|
Properties |
Metric |
Imperial |
|
Tensile strength (precipitation hardened, value at room temperature) |
1210 MPa |
175000 psi |
|
Tensile strength (@ 550°C/1020°F, precipitation hardened prior to test) |
970 MPa |
141000 psi |
|
Yield strength (@ strain 0.200%, precipitation hardened. value at room temperature) |
810 MPa |
117000 psi |
|
Yield strength (@ strain 0.200%, temperature 550°C/1020°F, precipitation hardened prior to test) |
700 MPa |
102000 psi |
|
Poisson's ratio |
0.281 |
0.281 |
|
Elongation at break (precipitation hardened) |
24% |
24% |
Thermal Properties
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@ 20-100°C/68-212°F) |
13.2 µm/m°C |
7.33 µin/in°F |
Industrial Applications of Incoloy 925 Alloy Bar
Incoloy 925 is widely used in industries where corrosion resistance and high strength are critical, including:
Oil & Gas Industry
- Downhole Equipment – Valves, hangers, packers, and tool joints for sour (H₂S-containing) wells.
- Surface Gas Well Components – High-stress fittings and fasteners exposed to corrosive media.
Chemical & Process Industry
- Pump Shafts & High-Strength Fasteners – Resistant to acidic and chloride-rich environments.
- Pressure Vessels & Piping Systems – Suitable for aggressive chemical processing.
Marine & Offshore Applications
- Subsea Components – Shafts, connectors, and bolts resistant to seawater corrosion.
- Desalination & Offshore Platforms – High-strength parts in chloride-exposed settings.
Incoloy 925 alloy bar is a premium choice for industries requiring high tensile strength combined with superior corrosion resistance, particularly in oil & gas, chemical processing, and marine engineering. Its unique composition ensures long-term reliability in extreme environments.
Contact us today for material specifications, availability, and pricing!
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