Incoloy 800 Weld Neck Flanges

Incoloy 800 Weld Neck Flanges are highly specialized pipe fittings essential for critical piping systems that operate under extreme conditions. Zeron Fastners manufactures these flanges from the nickel-iron-chromium alloy Incoloy 800 (UNS N08800), which is specifically engineered to offer exceptional resistance to oxidation and carburization at elevated temperatures. The Weld Neck design provides a high-integrity connection, transferring stress to the pipe itself, making these flanges suitable for severe service applications in industries like chemical processing, petrochemicals, power generation (especially superheater/reheater tubing), and heat treatment equipment. The flange provides a butt-weld connection to the pipe, ensuring strength and reducing turbulence.

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Incoloy 800 Weld Neck Flanges

Chemical Composition (Incoloy 800 Weld Neck Flanges)

Element Composition (%)
Nickel (Ni) 30.0 to 35.0
Chromium (Cr) 19.0 to 23.0
Iron (Fe) Balance
Carbon (C) 0.10 max
Manganese (Mn) 1.50 max
Silicon (Si) 1.00 max
Copper (Cu) 0.75 max
Titanium + Aluminium (Ti+Al) 0.15 to 1.20

Mechanical Properties (Incoloy 800 Weld Neck Flanges)

Property Minimum Value
Tensile Strength, min 520 MPa / 75 ksi
Yield Strength (0.2% Offset), min 205 MPa / 30 ksi
Elongation, min (%) 30
Hardness, max (Brinell) 200 HB

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