RathGibson

Product Information

Composition of 444 Pipe and Tubing


Grade 444
UNS Designation S44400
Nickel (Ni) 1.00
Chromium (Cr) 17.5–19.5
Iron (Fe) Bal.
Molybdenum (Mo) 1.75–2.50
Titanium (Ti) Max. 0.20 + 4x (C + N) Min. to 0.80 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. 0.025
Nitrogen (N) Max. 0.035
Silicon (Si) Max. 1.00
Sulphur (S) Max. 0.030
Phosphorous (P) Max. 0.040
Other Elements

Physical Properties of 444 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)
444 S44400 A268 60,000 415 60 40,000 275 40 12* 100 Rb 7.7 186

444 Product Range


Alloy UNS Designation Werkstoff NR. Specifications*
444 S44400 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.