Nickel-chromium alloy, INCONEL 706, annealed

INCONEL 706, annealed, Designation

N09706, wrought
Condition	Annealed
UNS number	N09706
US name	AMS 5701, AMS 5702, AMS 5703, AMS 5605, AMS 5606

INCONEL 706, annealed, Tradenames

INCONEL 706	Special Metals Corp. (USA)
ALLVAC 706	ATI Allvac (USA)

INCONEL 706, annealed, Typical uses

Turbine parts

INCONEL 706, annealed, Composition detail

Al (aluminum)	0	–	0.4	%
B (boron)	0	–	0.006	%
C (carbon)	0	–	0.06	%
Cr (chromium)	14.5	–	17.5	%
Cu (copper)	0	–	0.3	%
Fe (iron)	31.7	–	42.5	%
Mn (manganese)	0	–	0.35	%
Nb (niobium)	1.25	–	1.65	%
Ni (nickel)	39	–	44	%
P (phosphorus)	0	–	0.02	%
S (sulfur)	0	–	0.015	%
Si (silicon)	0	–	0.35	%
Ta (tantalum)	1.25	–	1.65	%
Ti (titanium)	1.5	–	2	%

INCONEL 706, annealed, Physical properties

Density

–

8.15

g/cm³

INCONEL 706, annealed, Mechanical properties

Young’s modulus	205	–	215	GPa
Specific stiffness	25.3	–	26.7	MN.m/kg
Yield strength (elastic limit)	900	–	1110	MPa
Tensile strength	1170	–	1450	MPa
Specific strength	111	–	138	kN.m/kg
Elongation	15	–	25	% strain
Compressive strength	900	–	1110	MPa
Flexural modulus	205	–	215	GPa
Flexural strength (modulus of rupture)	900	–	1110	MPa
Shear modulus	75	–	85	GPa
Bulk modulus	170	–	200	GPa
Poisson’s ratio	0.3	–	0.32
Shape factor	17
Hardness – Vickers	330	–	400	HV
Hardness – Rockwell B	108	–	112	HRB
Hardness – Rockwell C	33	–	41	HRC
Hardness – Brinell	314	–	379	HB
Elastic stored energy (springs)	1.95e3	–	2.91e3	kJ/m^3
Fatigue strength at 10^7 cycles	465	–	725	MPa
Fatigue strength model (stress range) _{Parameters: Stress Ratio = -1, Number of Cycles = 1e7cycles}	433	–	779	MPa

INCONEL 706, annealed, Impact & fracture properties

Fracture toughness	116	–	129	MPa.m^0.5
Toughness (G)	64.3	–	79.4	kJ/m²

INCONEL 706, annealed, Thermal properties

Melting point	1330	–	1370	°C
Maximum service temperature	767	–	967	°C
Minimum service temperature	-273			°C
Thermal conductivity	11.5	–	13.5	W/m.°C
Specific heat capacity	425	–	465	J/kg.°C
Thermal expansion coefficient	12.5	–	14	µstrain/°C
Thermal shock resistance	319	–	406	°C
Thermal distortion resistance	0.855	–	1.04	MW/m
Latent heat of fusion	270	–	300	kJ/kg

INCONEL 706, annealed, Electrical properties

Electrical resistivity	80	–	120	µohm.cm
Electrical conductivity	1.44	–	2.16	%IACS
Galvanic potential	-0.13	–	-0.05	V

INCONEL 706, annealed, Magnetic properties

Magnetic type

Non-magnetic

INCONEL 706, annealed, Optical, aesthetic and acoustic properties

Transparency	Opaque
Acoustic velocity	5030	–	5160	m/s
Mechanical loss coefficient (tan delta)	1e-4	–	3e-4

INCONEL 706, annealed, Processing properties

Metal casting	Unsuitable
Metal cold forming	Acceptable
Metal hot forming	Limited use
Metal press forming	Acceptable
Metal deep drawing	Limited use
Machining speed	3.96 m/min
Weldability _{Notes: Preheating is not required, post weld heat treatment is required}	Good

INCONEL 706, annealed, Durability

Water (fresh)	Excellent
Water (salt)	Excellent
Weak acids	Excellent
Strong acids	Acceptable
Weak alkalis	Excellent
Strong alkalis	Excellent
Organic solvents	Excellent
Oxidation at 500C	Excellent
UV radiation (sunlight)	Excellent
Galling resistance (adhesive wear) _{Notes: Bronze or zinc alloy dies should be used to minimize galling.}	Limited use
Flammability	Non-flammable

INCONEL 706, annealed, Corrosion resistance

Pitting resistance equivalent number (PREN)	14.5 – 17.5
Pitting and crevice corrosion	Low (<20)
Stress corrosion cracking _{Note: Rated in chloride; Other susceptible environments: Hydroxide}	Not susceptible

INCONEL 706, annealed, Notes

INCONEL 706, annealed, Warning

All nickel compounds should be regarded as toxic. Some can cause cancer and/or fetal abnormalities.

INCONEL 706, annealed, Other notes

INCONEL is a registered tradename of the INCO group of companies.

As of September 1999 , INCONEL, INCOLOY, MONEL, NIMONIC, INCO-WELD, NILO, BRIGHTRAY, CORRONEL and UDIMET have become registered trademarks of Special Metals Corporation