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    Ferritics Alloys 29-4C

    Physical Properties of 29-4C Alloys in the Annealed Condition at -20°F to +100°F

          Tensile Strength Yield Strength            
    Alloy UNS Desig-nation 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)
    29-4C S44735 A268 75,000 515 75 60,000 415 60 10* 100 Rb 28.0 5.2 119

    *for 0.049” average wall

    Composition of 29-4C tubing and pipe

    Grade 29-4C
    UNS Designation S44735
    Nickel (Ni) 1.00
    Chromium (Cr) 28.00–30.00
    Iron (Fe) Bal.
    Molybdenum (Mo) 3.60–4.20
    Titanium (Ti) Max. **
    Aluminum (Al) Max.
    Cobalt (Co) Max.
    Tungsten (W)
    Vanadium (V) Max.
    Copper (Cu) Max.
    Manganese (Mn) Max. 1.00
    Niobium (Nb) plus Tantalum **
    Carbon (C) Max. 0.030
    Nitrogen (N) Max. 0.045
    Silicon (Si) Max. 1.00
    Sulphur (S) Max. 0.030
    Phosphorous (P) Max. 0.040
    Other Elements

    **(Ti + Cb) 0.20 - 1.00, & 6 (C + N) min

    29-4C Product Range

    Alloy UNS Designation Werkstoff NR. Specifications*
    29-4C S44735 N/A A/SA268

    *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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