Incoloy 825, also known as Alloy 825, N08825, and W.Nr. 2.4858, is a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. 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 825 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.
Whatsapp:
+8615900526263E-mail:
sales@cocessalloys.comChemical Composition
|
Nickel (Ni) |
38.0-46.0 % |
|
Iron (Fe) |
22.0 % min. |
|
Chromium (Cr) |
19.5-23.5 % |
|
Molybdenum (Mo) |
2.5-3.5 % |
|
Copper (Cu) |
1.5-3.0 % |
|
Titanium (Ti) |
0.6-1.2 % |
|
Carbon (C) |
0.05 % max. |
|
Manganese (Mn) |
1.0 % max. |
|
Sulfur (S) |
0.03 % max. |
|
Silicon (Si) |
0.5 % max. |
|
Aluminum (Al) |
0.2 % max. |
Physical Properties
|
Density, |
lb/in3 |
0.294 |
|
|
Mg/m3 |
8.14 |
|
Melting Range |
°F |
2500-2550 |
|
|
°C |
1370-1400 |
|
Specific Heat |
Btu/lb•°F |
0.105 |
|
|
J/kg•°C |
440 |
|
Curie Temperature |
°F |
<-320 |
|
|
°C |
<-196 |
|
Permeability at 200 oersted (15.9 kA/m) |
|
1.005 |
Mechanical Properties
|
Temperature |
Yield strength |
Tensile strength |
Elongation |
|||
|
Rp 0.2 |
Rm |
A |
||||
|
°C |
°F |
MPa |
Ksi |
MPa |
ksi |
% |
|
20 |
68 |
240 |
34.8 |
585 |
84.8 |
30 |
Incoloy 825 is utilized in a variety of applications due to its exceptional corrosion resistance, including:
1. Chemical Processing: The alloy is commonly used in chemical processing equipment, including vessels, tanks, heat exchangers, and piping systems, where resistance to corrosive environments containing sulfuric and phosphoric acids is crucial.
2. Pollution Control: Incoloy 825 finds application in pollution control equipment, such as scrubbers and stack liners, where it provides excellent resistance to corrosive gases and acidic environments.
3. Oil and Gas Recovery: The alloy is employed in oil and gas recovery applications, including components exposed to corrosive environments such as sour gas wells, where resistance to chloride-containing environments is essential.
4. Pickling Operations: Incoloy 825 is suitable for use in pickling operations in industries such as steel and metal processing, where it provides resistance to corrosive pickling acids.
5. Marine Engineering: The alloy is utilized in marine engineering applications, including seawater-cooled heat exchangers, piping systems, and other components exposed to chloride-containing environments.
Specifications for Incoloy 825 include the following:
|
Bar and Rod |
Forgings |
Seamless Pipe and Tube |
Welded Pipe and Tube |
Plate, Sheet, and Strip |
Fittings |
|
ASTM B 425 & ASME SB 425 |
ASTM B 564 & ASME SB 564 |
ASTM B 163/B 407 & ASME SB 163/ SB 407 |
ASTM B 704/B 705 & ASME SB 704/ SB 705 |
ASTM B 424 & ASME SB 424 |
ASTM B 366/ASME SB 366 |
Standard product forms of Incoloy 825 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.
