Nickel-Fe-Cr alloy, NIMONIC 942, bar

NIMONIC 942 Designation

INCO Inc. Proprietary Alloy: “NIMONIC 942”

NIMONIC 942 Special Metals Corp. (USA)

Aerospace

Ni50 / Fe27 / Cr12 / Mo6 / Ti3.7 / Al1 / Si0.3 / Mn0.2 (impurities: Other<0.1)
Material family	Metal (non-ferrous)
Base material	Ni (Nickel)

Density

8.1

–

8.3

g/cm³

Young’s modulus	190	–	200	GPa
Specific stiffness	23.1	–	24.5	MN.m/kg
Yield strength (elastic limit)	950	–	1170	MPa
Tensile strength	1250	–	1560	MPa
Specific strength	116	–	143	kN.m/kg
Elongation	7	–	13	% strain
Compressive strength	950	–	1.17e3	MPa
Flexural modulus	190	–	200	GPa
Flexural strength (modulus of rupture)	950	–	1.17e3	MPa
Shear modulus	70	–	80	GPa
Bulk modulus	140	–	170	GPa
Poisson’s ratio	0.28	–	0.3
Shape factor	15
Hardness – Vickers	350	–	415	HV
Hardness – Rockwell B	109	–	113	HRB
Hardness – Rockwell C	36	–	42	HRC
Hardness – Brinell	332	–	393	HB
Elastic stored energy (springs)	2330	–	3480	kJ/m^3
Fatigue strength at 10^7 cycles	500	–	780	MPa
Fatigue strength model (stress range) _{Parameters: Stress Ratio = -1, Number of Cycles = 1e7cycles}	465	–	839	MPa

Fracture toughness	60.5	–	67.2	MPa.m^0.5
Toughness (G)	18.8	–	23.2	kJ/m²

Melting point	1240	–	1300	°C
Maximum service temperature	707	–	907	°C
Minimum service temperature	-273			°C
Thermal conductivity	11	–	15	W/m.°C
Specific heat capacity	400	–	440	J/kg.°C
Thermal expansion coefficient	12.5	–	14	µstrain/°C
Thermal shock resistance	363	–	461	°C
Thermal distortion resistance	0.825	–	1.14	MW/m
Latent heat of fusion	270	–	300	kJ/kg

Magnetic type

Non-magnetic

Transparency	Opaque
Acoustic velocity	4810	–	4950	m/s
Mechanical loss coefficient (tan delta)	1e-4	–	3e-4

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

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

Pitting resistance equivalent number (PREN)	32.3
Pitting and crevice corrosion	High (30-40)
Stress corrosion cracking _{Note: Rated in chloride; Other susceptible environments: Hydroxide}	Not susceptible