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    Physical Properties of Super Austenitic 904L Alloys 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)
    904L N08904 A249, A312 71,000 490 71 31,000 215 31 35 90 Rb 28.0 8.5 79
    904L N08904 B673, B674 71,000 490 71 31,000 215 31 35 8.5 79

    Composition of Super Austenitic 904L tubing and pipe

    Grade 904L
    UNS Designation N08904
    Nickel (Ni) 23.0 – 28.0
    Chromium (Cr) 19.0 – 23.0
    Iron (Fe) Bal.
    Molybdenum (Mo) 4.0 – 5.0
    Titanium (Ti) Max.
    Aluminum (Al) Max.
    Cobalt (Co) Max.
    Tungsten (W)
    Vanadium (V) Max.
    Copper (Cu) Max. 1.00 – 2.00
    Manganese (Mn) Max. 2.00
    Niobium (Nb) plus Tantalum
    Carbon (C) Max. 0.020
    Nitrogen (N) Max. 0.10
    Silicon (Si) Max. 1.00
    Sulphur (S) Max. 0.035
    Phosphorous (P) Max. 0.045
    Other Elements

    Super Austenitic 904L Product Range

    Alloy UNS Designation Werkstoff NR. Specifications*
    904L N08904 1.4539 A269, A/SA249, B/SB674, A/SA312, B/SB673

    *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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