Incoloy 825/UNS N08825

ncoloy 825 (Alloy 825 / UNS N08825 / W.Nr. 2.4858) is a nickel-iron-chromium alloy enhanced with molybdenum (2.5–3.5 %), copper (1.5–3.0 %), and titanium (0.6–1.2 %) — a chemistry deliberately engineered for sulfuric acid, phosphoric acid, and sour gas service. The Mo + Cu combination delivers outstanding resistance to reducing acids, while Cr maintains performance in oxidizing media, making 825 one of the most versatile corrosion alloys in the Fe-Ni-Cr family.

Incoloy 825 is the industry standard for sulfuric and phosphoric acid plants, and one of the most cost-effective NACE MR0175-compliant nickel alloys for sour oil & gas service. Specified in chemical reactors, evaporators, FGD systems, sour well downhole tubing, nuclear fuel reprocessing, and pickling equipment worldwide. Available in plate, sheet, strip, bar, rod, billet, wire, seamless/welded pipe & tube, fittings, flanges, and forgings.

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Product Specifications

Chemical composition
Name
%
Ni
Cr
C
Mn
Fe
Si
Cu
Mo
Al
Ti
P
S
ALLOY
825
Min
38
19.5
-
-
Bal
-
1.5
2.5
-
0.6
-
-
Max
46
23.5
0.05
1
Bal
0.5
3
3.5
0.2
1.2
0.02
0.03
Physical- Mechanical properties
Melting point
Density
Alloy and State
Tensile
strength
Yield
strength
Extensibility
RmN/mm²
Rp0.2N/mm
A5%
1350-1400°C
8.0g/cm³
Annealing
≥586
≥241
30

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Product Certificate

Discover Our Wide Range of Product Forms and Ideal Sizes

Looking for the perfect product form and size? We’ve got you covered!

Our product is available in various forms such as Sheet / Plate, Bar, Wire, Tube / Pipe, and Strip. With a wide thickness range (0.5 – 60mm for sheets), customizable tolerance, and different surface finishes, we can tailor to your unique needs. Plus, our flexible MOQ and reliable packaging ensure a smooth purchasing experience. Don’t miss out on finding the ideal product for your project!

Size Range:
Thickness: 0.5~60mm
Tolerance:
Customizable
Surface Finish:
Acid pickling / Bright
MOQ:
50~1000 Kg
Packaging:
Wooden Box / Pallet
Size Range:
Outer Diameter: 6~300mm
Tolerance:
Customizable
Surface Finish:
Black / Bright
MOQ:
50~1000 Kg
Packaging:
Wooden Box / Pallet
Size Range:
Outer Diameter: 0.01~12mm
Tolerance:
Customizable
Surface Finish:
Acid pickling / Bright
MOQ:
50~1000 Kg
Packaging:
Wooden Box / Pallet
Size Range:
Outer Diameter: 1~500mm
Tolerance:
Customizable
Surface Finish:
Acid pickling / Bright
MOQ:
50~1000 Kg
Packaging:
Wooden Box / Pallet
Size Range:
Thickness: 0.03~5mm
Tolerance:
Customizable
Surface Finish:
Acid pickling / Bright
MOQ:
50~1000 Kg
Packaging:
Wooden Box / Pallet

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