Product Information

Composition of 439 Pipe and Tubing

Grade 439
UNS Designation S43035
Nickel (Ni) 0.50
Chromium (Cr) 17.0–19.0
Iron (Fe) Bal.
Molybdenum (Mo)
Titanium (Ti) Max. 0.20 + 4x (C + N) Min. to 1.10 Max.
Aluminum (Al) Max. 0.15
Cobalt (Co) Max.
Tungsten (W)
Vanadium (V) Max.
Copper (Cu) Max.
Manganese (Mn) Max. 1.00
Niobium (Nb) plus Tantalum
Carbon (C) Max. 0.07
Nitrogen (N) Max. 0.04
Silicon (Si) Max. 1.00
Sulphur (S) Max. 0.030
Phosphorous (P) Max. 0.040
Other Elements

Physical Properties of 439 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 (x106 psi) Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6) Thermal Conductivity (BTU-in/ ft2-h-°F)
439 S43035 A268 60,000 415 60 30,000 205 30 20 90 Rb 29.0 5.6 168

439 Product Range

Alloy UNS Designation Werkstoff NR. Specifications*
439 S43035 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.