Description of Incoloy 825 Flange
Incoloy 825 is an austenitic nickel-iron-chromium alloy with additions of copper, molybdenum, and titanium.
The nickel content of Incoloy 825 makes it resistant to chloride stress corrosion cracking. The composition of molybdenum and copper improves the corrosion resistance in reducing environments of Incoloy 825 when compared to other austenitic stainless steels. The chromium and molybdenum make it more resistant to chloride pitting and oxidizing atmospheres. The titanium can stable the alloy against sensitization in the as-welded condition. These compositions make Incoloy825 have excellent resistance to stress corrosion cracking and great pitting resistance in most environments except strongly oxidizing chloride solutions.
The superior resistance ability to corrosion environments makes Incoloy 825 has been applied in many industrials such as chemical processing, pollution control, oil and gas recovery, and nuclear fuel reprocessing.
Other trade names: Alloy 825, UNS N08825, Inconel 825, Nicrofer 4221
Specifications of Incoloy 825 Flange
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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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Modulus of Elasticity
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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 μ 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
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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
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0.2 max
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Fe
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22.0 min
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Standards of Incoloy 825 Flange
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Rod, Bar, Wire, and Forging Stock
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Plate, Sheet, and Strip
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Pipe & Tube
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BS 3076NA16
ASTM B 425
ASTM B 564
ASME SB 425
ASME SB 564
ASME Code Case 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 Case 1936
DIN 17751
VdTÜV 432
ISO 6207
|
Applications of Incoloy 825 Flange
- Chemical processing
- Hot vessels for food water, seawater
- Pollution-control equipment
- Sulphuric acid piping and vessels
- Oil and gas well piping
- Nuclear fuel reprocessing
- Acid production
- Pickling equipment
- Radioactive waste handling
- Calorifiers
