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HAYNES^® 242^® alloy Information

An age-hardenable Ni-Mo-Cr alloy that combines high-temperature strength, low thermal expansion characteristics
and good oxidation-resistance for service to 1400°F (760°C). Also resistance to high-temperature fluorine and fluoride environments.

HAYNES^® 242^® alloy Site

Principal Features

Stress-Rupture Properties

Tensile Properties

Cold-Worked and Aged Tensile Properties

Comparison of Thermal Expansion Characteristics

Fatigue Properties

Hot Hardness Data

Thermal Stability

Physical Properties

Oxidation Resistance

Resistance to High-Temperature Fluoride
Environments

Resistance to Nitriding

Resistance to Salt Spray Corrosion

Resistance to Hydrogen Embrittlement

Aqueous Corrosion Resistance

Fabrication and Welding

Health and Safety Information

Machining

HAYNES^® 242^® alloy
Technical Briefs

HAYNES^® 242 ^® alloy
Wire Information

Metallurgist Support

Sales Office Addresses

Tubular Products

Fittings & Flanges

Typical Physical Properties

Temp., °F		British Units	Temp., °C	Metric Units
Density	Room	0.327 lb/in³	Room	9.05 g/cm³
Melting Range	2350-2510		1290-1375
Electrical Resistivity	Room	48.0 μohm-in	Room	122.0 μohm-cm
	200	48.5 μohm-in	100	123.4 μohm-cm
	400	49.3 μohm-in	200	125.1 μohm-cm
	600	50.0 μohm-in	300	126.7 μohm-cm
	800	50.6 μohm-in	400	128.0 μohm-cm
	1000	51.1 μohm-in	500	129.5 μohm-cm
	1200	51.7 μohm-in	600	130.6 μohm-cm
	1400	52.4 μohm-in	700	132.0 μohm-cm
	1600	51.3 μohm-in	800	132.4 μohm-cm
	1800	50.4 μohm-in	900	129.8 μohm-cm
			1000	127.6 μohm-cm

Thermal Diffusivity	Room	4.7 x 10^-3 in²/sec	Room	30.5 x 10^-3 cm²/sec
	200	5.1 x 10^-3 in²/sec	100	32.9 x 10^-3 cm²/sec
	400	5.6 x 10^-3 in²/sec	200	35.9 x 10^-3 cm²/sec
	600	6.1 x 10^-3 in²/sec	300	39.0 x 10^-3 cm²/sec
	800	6.6 x 10^-3 in²/sec	400	41.9 x 10^-3 cm²/sec
	1000	7.2 x 10^-3 in²/sec	500	45.0 x 10^-3 cm²/sec
	1200	7.9 x 10^-3 in²/sec	600	48.1 x 10^-3 cm²/sec
	1400	7.2 x 10^-3 in²/sec	700	51.2 x 10^-3 cm²/sec
	1600	7.0 x 10^-3 in²/sec	800	44.2 x 10^-3 cm²/sec
	1800	7.6 x 10^-3 in²/sec	900	46.6 x 10^-3 cm²/sec
			1000	49.6 x 10^-3 cm²/sec

Thermal Conductivity	Room	75.7 BTU-in/ft² hr.-°F	Room	11.3 W/m-K
	200	83.6 BTU-in/ft² hr-°F	100	12.6 W/m-K
	400	96.1 BTU-in/ft² hr-°F	200	14.2 W/m-K
	600	108.5 BTU-in/ft² hr-°F	300	15.9 W/m-K
	800	120.9 BTU-in/ft² hr-°F	400	17.5 W/m-K
	1000	133.3 BTU-in/ft² hr-°F	500	19.2 W/m-K
	1200	145.7 BTU-in/ft² hr-°F	600	20.9 W/m-K
	1400	158.2 BTU-in/ft² hr-°F	700	22.5 W/m-K
	1600	170.6 BTU-in/ft² hr-°F	800	24.2 W/m-K
	1800	183.0 BTU-in/ft² hr-°F	900	25.8 W/m-K
			1000	27.5 W/m-K

Specific Heat	Room	0.092 BTU/lb-°F	Room	386 J/Kg-k
	200	0.097 BTU/lb-°F	100	405 J/Kg-K
	400	0.100 BTU/lb-°F	200	419 J/Kg-K
	600	0.103 BTU/lb-°F	300	431 J/Kg-K
	800	0.106 BTU/lb-°F	400	439 J/Kg-K
	1000	0.110 BTU/lb-°F	500	451 J/Kg-K
	1200	0.118 BTU/lb-°F	600	470 J/Kg-K
	1400	0.144 BTU/lb-°F	700	595 J/Kg-K
	1600	0.146 BTU/lb-°F	800	605 J/Kg-K
	1800	0.150 BTU/lb-°F	900	610 J/Kg-K
			1000	627 J/Kg-K

Mean Coefficient of Thermal Expansion	70-200	6.0 microinches/in-°F	25-100	10.8 μm/m-°C
	70-400	6.3 microinches/in-°F	25-200	11.3 μm/m-°C
	70-600	6.5 microinches/in-°F	25-300	11.6 μm/m-°C
	70-800	6.7 microinches/in-°F	25-400	11.9 μm/m-°C
	70-1000	6.8 microinches/in-°F	25-500	12.2 μm/m-°C
	70-1100	6.8 microinches/in-°F	25-600	12.3 μm/m-°C
	70-1200	6.9 microinches/in-°F	25-650	12.4 μm/m-°C
	70-1300	7.2 microinches/in-°F	25-700	13.0 μm/m-°C
	70-1400	7.7 microinches/in-°F	25-750	13.7 μm/m-°C
	70-1600	8.0 microinches/in-°F	25-800	14.0 μm/m-°C
	70-1800	8.3 microinches/in-°F	25-900	14.5 μm/m-°C
			25-1000	15.0 μm/m-°C

Dynamic Modulus of Elasticity

Temp., °F	Dynamic Modulus of Elasticity, 10⁶ psi	Temp., °C	Dynamic Modulus of Elasticity, GPa
Room	33.2	Room	229
200	32.7	100	225
400	31.8	200	219
600	30.8	300	213
800	29.7	400	206
1000	28.6	500	199
1200	27.6	600	193
1400	25.7	700	185
1600	24.0	800	172
1800	22.4	900	163
		1000	152