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SUPER AUSTENITIC N08811 Alloy

Physical Properties of Super Austenitic N08811 Alloy in the Annealed Condition at -20°F to +100°F

      Tensile Strength Yield Strength            
Alloy UNS Designation Spec. psi MPa ksi psi MPa ksi Elongation in 2 in. (min.) % Grain Size Req. Max. Hardness Modulus of Elasticity (x106psi) Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6) Thermal Conductivity (BTU-in/ ft2-h-°F)
800HT N08811 B514, B515 65,000 450 65 25,000 170 25 30 5 & coarser 7.9 80

Composition of Super Austenitic N08811 tubing and pipe

Grade N08811
UNS Designation N08811
Nickel (Ni) 30.0– 35.0
Chromium (Cr) 19.0–23.0
Iron (Fe) 39.5 Min.
Molybdenum (Mo)
Titanium (Ti) Max. 0.15–0.60*
Aluminum (Al) Max. 0.15–0.60
Cobalt (Co) Max.
Tungsten (W)
Vanadium (V) Max.
Copper (Cu) Max. 0.75
Manganese (Mn) Max. 1.5
Niobium (Nb) plus Tantalum
Carbon (C) Max. 0.06–0.10
Nitrogen (N) Max.
Silicon (Si) Max. 100
Sulphur (S) Max. 0.1015
Phosphorous (P) Max.
Other Elements

Super Austenitic N08811 Product Range

UNS Designation Werkstoff NR. Specifications*
N08811 1.4876 B/SB515, B/SB514

*Note: The specifications noted including ASTM, ASME, or other applicable authorities are correct at the time of publication. Other specifications may apply for use of these materials in different applications.

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