Limiting Chemical Composition, %

Ni - 58.0 min.
Cr - 20.0 – 23.0
Mo - 8.0 – 10.0
Nba - 3.15 – 4.15
Fe - 5.0 max.
C - 0.03 max.
Si - 0.15 max.
N - 0.02 max.
Mn - 0.50 max.
S - 0.015 max.
Al - 0.40 max.
Ti - 0.40 max.
P - 0.015 max.
aPlus Ta. Co - 1.0 max.

Typical Mechanical Properties (Annealed)

Tensile Strength, ksi •••••• 130
MPa ••••••. 894
Yield Strength (0.2% Offset), ksi •••••• 68
MPa •••••• 469
Elongation, % •••••• 50

Physical Constants and Thermal Properties

Density, Ib/in3 •••••• 0.305 /
g/cm3 •••••• 8.44
Melting Range, °F •••••• 2350 – 2460
°C •••••• 1290 – 1350
Specific Heat, Btu/lb •°F •••••• 0.098
J/kg • °C•••••• 410
Curie Temperature, °F •••••• <-320
°C •••••• <-196
Permeability at 200 Oersted (15.9 kA/m) •••••• 1.0006
Coefficient of Expansion,
70 – 200°F, 10-6 in/in • °F•••••• 7.1
20 – 100°C, μm/m • °C .... 12.8
Thermal Conductivity, Btu • in/ft2•h•°F •••••• 68
W/m• °C •••••• 9.7
Electrical Resistivity, ohm• circ mil/ft •••••• 776
μΩ•m •••••• 1.29

Specifications and Designation

UNS N06625, N06626
ASTM B 366, B 443, B 704,
B 705, B 751, B 775
ASME SB-366, SB-443,
SB-704, SB-705,
SB-751, SB-775
SAE AMS 5879
ASME Code Case 2276

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