Description of Incoloy 825 Plate/Sheet
Incoloy 825 is an austenitic nickel–iron–chromium alloy with additions of copper, molybdenum and titanium.
The nickel content of Incoloy 825 renders it resistant to chloride stress corrosion cracking. The combination of molybdenum and copper enhances its corrosion resistance in reducing environments in comparison with other austenitic stainless steels. Chromium and molybdenum increase its resistance to chloride pitting and oxidising atmospheres. Titanium may stabilise the alloy against sensitisation in the welded state. These compositions provide Incoloy 825 with a high resistance to stress corrosion cracking and pitting in most environments, except in strongly oxidising chloride solutions.
Owing to its excellent corrosion resistance, Incoloy 825 is employed in multiple industrial sectors, for example, chemical processing, environmental protection, oil and gas extraction and nuclear fuel reprocessing.
Other Trade Names: Alloy 825, UNS N08825, Inconel 825, Nicrofer 4221
Specifications of Incoloy 825 Plate/Sheet
Density
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8.14 g/cm³
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Specific Heat
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440 J/kg-K
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Elastic Modulus
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196 MPa (38°C)
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Magnetic Permeability
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1.005 Oersted (μ at 200H)
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Thermal Conductivity
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11.3 W/m-K (26°C)
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Melting Range
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1370 – 1400°C
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Electrical Resistivity
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1.13 µΩ·cm (26°C)
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Chemical Analysis (%)
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C
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0.05 max.
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Mn
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1.0 max.
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S
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0.03 max
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Si
|
0.5 max
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Cr
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19.5 – 23.5
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Ni
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38.0 – 46.0
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Mo
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2.5 – 3.5
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Cu
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1.5 – 3.0
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Ti
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0.6 – 1.2
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Al
|
0.2 max.
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Fe
|
22.0 min
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Standards for Incoloy 825 Plate/Sheet
Bars, Rods, Wire and Forgings
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Plates, Sheets and Strips
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Tubes and Hoses
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BS 3076NA16 ASTM B 425 ASTM B 564 ASME SB 425 ASME SB 564 ASME Code Fall N-572 DIN 17752 DIN 17753 DIN 17754 VdTÜV 432 ISO 9723 ISO 9724 ISO 9725
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BS 3072NA16 BS 3073NA16 ASTM B 424 ASTM B 906 ASME SB 424 ASME SB 906 DIN 17750 VdTÜV 432 ISO 6208
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BS 3074NA16 ASTM B 163 ASTM B 423 ASTM B 704 ASTM B 705 ASTM B 751 ASTM B 775 ASTM B 829 ASME SB 163 ASME SB 423 ASME SB 704 ASME SB 705 ASME SB 751 ASME SB 775 ASME SB 829 ASME Code Gehäuse 1936 DIN 17751 VdTÜV 432 ISO 6207
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Applications of Incoloy 825 Plate/Sheet
- Chemical processing
- Hot containers for potable water and seawater
- Equipment for pollution control
- Pipelines and vessels for sulphuric acid
- Pipelines for oil and gas drilling
- Nuclear fuel reprocessing
- Acid production
- Pickling plants
- Handling of radioactive waste
- Calorifiers