Incoloy 925, also known as Alloy 925, N09925, and W.Nr. 2.4375, is a precipitation hardenable nickel-iron-chromium alloy with additions of molybdenum, copper, titanium, and aluminum. This alloy offers excellent resistance to a wide range of corrosive environments, including those containing sulfuric and phosphoric acids, as well as seawater and other chloride-containing environments. Incoloy 925 is highly resistant to both reducing and oxidizing acids, stress-corrosion cracking, and pitting and crevice corrosion. It is commonly used in applications such as chemical processing, pollution control, oil and gas recovery, pickling operations, and marine engineering due to its exceptional corrosion resistance. Additionally, it is suitable for use in sulfuric acid and phosphoric acid processing equipment.
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sales@cocessalloys.comChemical Composition
|
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 |
Physical Properties
|
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 |
Mechanical Properties
|
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 |
Incoloy 925 is commonly utilized in various demanding applications due to its exceptional corrosion resistance, including:
1. Oil and Gas Production: The alloy is used in oil and gas production equipment, particularly in environments containing hydrogen sulfide (H2S) and carbon dioxide (CO2), where resistance to corrosion and stress cracking is crucial.
2. Downhole Equipment: Incoloy 925 finds application in downhole equipment such as control lines and safety valves in oil and gas wells, where it provides excellent resistance to corrosion in aggressive downhole environments.
3. Subsea Equipment: The alloy is employed in subsea equipment, including components exposed to seawater and chloride-containing environments, where its corrosion resistance is essential for long-term performance.
4. Marine Components: Incoloy 925 is utilized in marine components such as seawater-cooled heat exchangers, piping systems, and other equipment requiring resistance to chloride-containing environments.
5. Chemical Processing: The alloy is suitable for use in chemical processing equipment, including vessels, tanks, and piping systems, where resistance to corrosive environments containing sulfuric and phosphoric acids is essential.
Specifications for Incoloy 925 include the following:
|
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 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 sales@cocessalloys.com for full information.
