Nickel-Fe-Cr alloy, Incoloy 901, aged

Incoloy 901, aged, Designation

Incoloy alloy 901
Condition	Solution treated and precipitated
UNS number	N09901
US name	AMS 5660, 5661, 5830
ISO name	9723

Incoloy 901, aged, Tradenames

Inconel 901

Nimonic 901

Alloy 901

Incoloy 901, aged, Typical uses

Aircraft gas turbine blades

Turbine discs

Seals

Shafts

Casings

Incoloy 901, aged, Compositional summary

Ni39-48 / Fe34-35 / Cr11-14 / Mo5-6.5 / Ti2.4-3.1 (impurities: Co<1, Cu<0.5, Al<0.35, C<0.1)

Material family Metal (non-ferrous)

Base material Ni (Nickel)

Incoloy 901, aged, Composition detail

Al (aluminum)	0	–	0.35	%
B (boron)	0.01	–	0.02	%
C (carbon)	0	–	0.1	%
Co (cobalt)	0	–	1	%
Cr (chromium)	11	–	14	%
Cu (copper)	0	–	0.5	%
Fe (iron)	34	–	35	%
Mo (molybdenum)	5	–	6.5	%
Ni (nickel)	39	–	48	%
Ti (titanium)	2.4	–	3.1	%

Incoloy 901, aged, Physical properties

Density

8.16

–

8.22

g/cm³

Incoloy 901, aged, Mechanical properties

Young’s modulus	196	–	206	GPa
Specific stiffness	23.9	–	25.2	MN.m/kg
Yield strength (elastic limit)	758	–	862	MPa
Tensile strength	1050	–	1240	MPa
Specific strength	92.5	–	105	kN.m/kg
Elongation	10	–	17	% strain
Compressive modulus	196	–	206	GPa
Compressive strength	758	–	862	MPa
Flexural modulus	196	–	206	GPa
Flexural strength (modulus of rupture)	525	–	620	MPa
Shear modulus	76.3	–	80.2	GPa
Shear strength	735	–	868	MPa
Bulk modulus	152	–	160	GPa
Poisson’s ratio	0.27	–	0.3
Shape factor	2.06
Hardness – Vickers	302	–	388	HV
Hardness – Rockwell C	32	–	42	HRC
Hardness – Brinell	302	–	388	HB
Elastic stored energy (springs)	1430	–	1850	kJ/m³
Fatigue strength at 10^7 cycles	574	–	670	MPa

Incoloy 901, aged, Impact & fracture properties

Fracture toughness	120	–	133	MPa.m^0.5
Toughness (G)	71.7	–	88	kJ/m²

Incoloy 901, aged, Thermal properties

Melting point	1290	–	1350	°C
Maximum service temperature	590	–	610	°C
Minimum service temperature	-273			°C
Thermal conductivity	12.9	–	13.9	W/m.°C
Specific heat capacity	420	–	431	J/kg.°C
Thermal expansion coefficient	12.2	–	16.2	µstrain/°C
Thermal shock resistance	245	–	334	°C
Thermal distortion resistance	0.823	–	1.1	MW/m
Latent heat of fusion	272	–	288	kJ/kg

Incoloy 901, aged, Electrical properties

Electrical resistivity	102	–	123	µohm.cm
Electrical conductivity	1.4	–	1.69	%IACS
Galvanic potential	-0.18	–	-0.1	V

Incoloy 901, aged, Magnetic properties

Magnetic type

Non-magnetic

Incoloy 901, aged, Optical, aesthetic and acoustic properties

Transparency	Opaque
Acoustic velocity	4890	–	5020	m/s
Mechanical loss coefficient (tan delta)	2e-4	–	4e-4

Incoloy 901, aged, Processing properties

Available forms: Forging billet, bar, and extruded section
Metal casting	Unsuitable
Metal cold forming	Acceptable
Metal hot forming	Acceptable
Metal press forming	Acceptable
Metal deep drawing	Unsuitable
Machining speed	7.62 m/min

Incoloy 901, aged, 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	Limited use
UV radiation (sunlight)	Excellent
Galling resistance (adhesive wear)	Limited use
Flammability	Non-flammable

Incoloy 901, aged, Corrosion resistance

Stress corrosion cracking

Not susceptible

Incoloy 901, aged, Notes

Warning

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

Other notes

Inconel 901 is a chromium-nickel-iron base, age hardenable, superalloy designed for high strength and corrosion resistance at elevated temperatures. It is hardened by precipitation of nickel, titanium and aluminum compounds. Typical applications for 901 bar include gas turbine engines, and high temperature bolting.