INCONEL 706

INCONEL alloy 706 is a precipitation-hardenable nickel-iron-chromium alloy that provides high mechanical strength in combination with good fabricability. The properties of the alloy are similar to those of INCONEL alloy 718 (N07718) except that alloy 706 is more readily fabricated, particularly by machining. Primary uses of the alloy are aerospace and land-based gas turbine parts and components, requiring resistance to creep, and stress rupture up to 1300˚F (704˚C), oxidation resistance and good fabricability.

Round bar and forging stock.

UNS N09706,SAE AMS 5605, 5606, 5701 – 5703

Ni^a......39.0 – 44.0
Cr....... 14.5 – 17.5
Fe.......Remainder
Nbb.........2.5 – 3.3
^aPlus Co. bPlus Ta.
Ti............1.5 – 2.0
Al..........0.40 max.
C...........0.06 max.
Cu........0.30 max.
Mn........0.35 max.
S........ 0.015 max.
Si..........0.35 max.
P......... 0.020 max.
B........ 0.006 max.
Co.........1.00 max.

Density, Ib/in³ (g/cm³)............................................0.291 (8.05)
Melting Range, °F (°C)..............2434 – 2499 (1334 – 1371)
Specific Heat, Btu/lb•°F (J/kg•°C).......................0.106 (444)
Curie Temperature, °F (°C)....................................<-109 (-78)
Permeability at 200 Oersted (15.9 kA/m).....................1.011
Coefficient of Expansion, 10^-6 in/in•°F (μm/m•°C)
70-200°F (21–93°C)......................7.40 (13.3)
70-500°F (21–260°C).................. 8.25 (14.9)
70-800°F (21–427°C).................. 8.57 (15.4)
70-1000°F (21–538°C)................ 8.73 (15.7)
70-1200°F (21–650°C)................ 8.97 (16.2)
Thermal Conductivity^A, Btu•in/ft²•h•°F.....................................87
W/m•°C.............................................. 12.5
Electrical Resistivity^A, ohm•circ mil/ft...................................592
μΩ•m................................................ 0.985
Young’s Modulus^A, 10⁶ psi (GPa)............................ 30.4 (210)
Shear’s Modulus^A, 10⁶ psi (GPa)................................11.0 (76)
Poisson’s Ratio^A.....................................................................0.382
Hardness^A, HRC.................................................................36 – 42
^ARoom temperature, as aged.