PCC Energy Group


Super Austenitic Pipe and Tubing

Product Information

Composition of Super Austenitic 904L Pipe and Tubing
UNS DesignationN08904
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
Physical Properties of Super Austenitic 904L Alloys in the Annealed Condition at -20°F to +100°F
      Tensile StrengthYield Strength            
AlloyUNS DesignationSpec.psiMPaksipsiMPaksiElongation in 2 in. (min.) %Grain Size Req.Max. HardnessModulus of Elasticity (x106 psi)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
Super Austenitic 904L Product Range
AlloyUNS DesignationWerkstoff 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.