High Alloy Materials
Nickel Alloy 686

Physical Properties of Nickel Alloy 686 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 (x106psi) Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6) Thermal Conductivity (BTU-in/ ft2-h-°F)
686 N06686 B619, B626 100,000 690 100 45,000 310 45 45 30.0 6.7 118

Composition of Nickel Alloy 686 tubing and pipe

Grade 686
UNS Designation N06686
Nickel (Ni) Bal.
Chromium (Cr) 19.0–23.0
Iron (Fe) 5.0 Max.
Molybdenum (Mo) 15.0–17.0
Titanium (Ti) Max. 0.02–0.25
Aluminum (Al) Max.
Cobalt (Co) Max.
Tungsten (W) 3.0–4.40
Vanadium (V) Max.
Copper (Cu) Max.
Manganese (Mn) Max. 0.75
Niobium (Nb) plus Tantalum
Carbon (C) Max. 0.10
Nitrogen (N) Max.
Silicon (Si) Max. 0.08
Sulphur (S) Max. 0.02
Phosphorous (P) Max. 0.04
Other Elements

Nickel Alloy 686 Product Range

Alloy UNS Designation Werkstoff NR. Specifications*
686 N06686 2.4606 B/SB626, B/SB619

*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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