Incoloy 925 (Alloy 925), designated as UNS N09925 and W.Nr. 2.4375, is a nickel-iron-chromium alloy with added molybdenum, copper, and titanium. It provides excellent resistance to sulfide stress cracking, pitting, and general corrosion in harsh environments, especially those found in sour gas and offshore oil fields.
Alloy 925 is commonly used in oil & gas components such as downhole tools, valves, hangers, and tubing. Its combination of corrosion resistance and high strength makes it ideal for aggressive environments containing hydrogen sulfide (H₂S), chloride ions, and CO₂.
| Nickel (Ni) | 42.0–46.0 % |
| Chromium (Cr) | 19.5–22.5 % |
| Iron (Fe) | 22.0 % max |
| Molybdenum (Mo) | 2.5–3.5 % |
| Titanium (Ti) | 1.9–2.40 % |
| Aluminum (Al) | 0.1–0.5 % |
| Copper (Cu) | 1.5–3.0 % |
| Carbon (C) | 0.03 % max |
| SNiobium (Nb) | 0.5 % max |
| Manganese (Mn) | 1.0 % max |
| Silicon (Si) | 0.5 % max |
| Phosphorus (P) | 0.03 % max |
| Sulfur (S) | 0.03 % max |
| Density | lb/in3 | 0.292 |
| g/cm3 | 8.08 | |
| Melting Range | °F | 2392-2490 |
| °C | 1311-1366 | |
| Electrical Resistivity | ohm cmil/ft | 701 |
| µΩ m | 1.17 | |
| Permeability at 200 oersteds (15.9 kA/m) | 1.001 |
|
Form/Condition |
Tensile Strength |
Yield Strength |
Elongation |
Hardness |
||
|
ksi |
M P a |
ksi |
MPa |
% |
Rockwell |
|
|
Round/Solution-Annealed |
99.3 |
685 |
39.3 |
271 |
56 |
76 B |
|
Round/Solution-Annealed |
167.3 |
1154 |
120.6 |
832 |
27 |
32 C |
|
Cold Drawn Tubing/Solution- |
172.5 |
1189 |
120.4 |
830 |
27 |
35 C |
| Bar and Rod | Forgings | Wire |
| ASTM B 637 & ASME SB 637, B 805 & SB 805 | ASTM B 637 & ASME SB 637 | ASTM B 366805/ASME SB 805 |
Standard product forms of Incoloy 925/Alloy 925/UNS N09925/W.Nr. 2.4375 are pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon and wire. The products are available in a wide variety of sizes. Please contact us at [email protected] for full information.
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