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Super Austenitic 25-6MO tubing and pipe header image

Physical Properties of 25-6MO 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 (x106 psi) Mean Coefficient of Thermal Expansion IN./ IN./ °F x 10-6) Thermal Conductivity (BTU-in/ ft2-h-°F)
25-6MO N08926 A249, A312 94,000 (650) 94 43,000 (295) 43 35 100 Rb 28.1 8.5 116
25-6MO N08926 B673, B674 94 43 35 8.5 116

Composition of 25-6MO tubing and pipe

Grade 25-6MO
UNS Designation N08926
Nickel (Ni) 24.0 – 26.0
Chromium (Cr) 19.0 – 21.0
Iron (Fe) Bal.
Molybdenum (Mo) 6.0 – 7.0
Titanium (Ti) Max.
Aluminum (Al) Max.
Cobalt (Co) Max.
Tungsten (W)
Vanadium (V) Max.
Copper (Cu) Max. 0.50 – 1.50
Manganese (Mn) Max. 2.00
Niobium (Nb) plus Tantalum
Carbon (C) Max. 0.020
Nitrogen (N) Max. 0.15 – 0.25
Silicon (Si) Max. 0.5
Sulphur (S) Max. 0.010
Phosphorous (P) Max. 0.03
Other Elements

25-6MO Product Range

Alloy UNS Designation Werkstoff NR. Specifications*
25-6MO N08926 1.4529 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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