HASTELLOY^® X alloy Information

A nickel-base alloy with an exceptional combination of oxidation resistance, fabricability and high-temperature strength.

Principal Features

Oxidation

Carburization

Health and Safety

Typical Physical Properties

Physical Property	Temp., °F	British Units	Temp., °C	Metric Units

Density	72	0.297 lb/in.³	22	8.22 g/cm.³
Melting Temperature	2300-2470		1260-1355

Electrical Resistivity	72	46.6 microhm-in. (712 ohms per cir. mil-ft.)	22	1.18 microhm-cm

Mean Coefficient of Thermal Expansion	79-200	7.7 microinches/in.-°F	26-93	13.9 x 10^-6m/m-°C
Mean Coefficient of Thermal Expansion	79-1000	8.4 microinches/in.-°F	26-538	15.1 x 10^-6m/m-°C
	79-1200	8.6 microinches/in.-°F	26-649	15.5 x 10^-6m/m-°C
	79-1350	8.8 microinches/in.-°F	26-732	15.8 x 10^-6m/m-°C
	79-1500	8.9 microinches/in.-°F	26-816	16.0 x 10^-6m/m-°C
	79-1650	9.1 microinches/in.-°F	26-899	16.4 x 10^-6m/m-°C
	79-1800	9.2 microinches/in.-°F	26-982	16.6 x 10^-6m/m-°C

Thermal Conductivity	70	63 Btu-in./ft.² hr.-°F	21	9.1 W/m-K
	200	76 Btu-in./ft.² hr.-°F	93	11.0 W/m-K
	500	98 Btu-in./ft.² hr.-°F	200	14.1 W/m-K
	1100	144 Btu-in./ft.² hr.-°F	593	20.8 W/m-K
	1300	159 Btu-in./ft.² hr.-°F	704	22.9 W/m-K
	1500	174 Btu-in./ft.² hr.-°F	816	25.1 W/m-K
	1700	189 Btu-in./ft.² hr.-°F	927	27.2 W/m-K

Specific Heat	Room	0.116 Btu/lb.-°F	Room	486 J/kg-K
	200	0.117 Btu/lb.-°F	93	490 J/kg-K
	400	0.118 Btu/lb.-°F	204	494 J/kg-K
	600	0.119 Btu/lb.-°F	316	498 J/kg-K
	800	0.123 Btu/lb.-°F	427	515 J/kg-K
	1000	0.130 Btu/lb.-°F	538	544 J/kg-K
	1200	0.139 Btu/lb.-°F	649	582 J/kg-K
	1400	0.151 Btu/lb.-°F	760	632 J/kg-K
	1600	0.167 Btu/lb.-°F	871	699 J/kg-K
	1800	0.186 Btu/lb.-°F	982	799 J/kg-K
	2000	0.205 Btu/lb.-°F	1093	858 J/kg-K

Poisson's Ratio	-108	0.328	-78	0.328
	72	0.320	22	0.320

Magnetic Permeability	Room	1.002 at 200 oersteds (15,900 A/m)

Dynamic Modulus of Elasticity, Plate

Condition	Temperature, °F	Dynamic Modulus of Elasticity, 10⁶ psi	Temperature °C	Dynamic Modulus of Elasticity, GPa

Heat-treated at 2150°F (1177°C) Rapid Cooled	Room	29.8	Room	205
	200	29.4	93	203
	400	28.6	204	197
	600	27.8	316	192
	800	26.7	427	184
	1000	25.8	538	178
	1200	24.7	649	170
	1400	23.3	760	161
	1600	22.2	871	153
	1800	20.4	982	141

Average Hardness, Room Temperature

Form	Condition	Average Hardness, Rockwell B

Sheet, 0.012 to 0.090 in. (0.30 to 2.3 mm) thick	Heat Treated at 2150°F (1177°C), Rapid Cooled	87*

Sheet, 0.091 to 0.312 in. (2.3 to 7.8 mm) thick	Heat Treated at 2150°F (1177°C), Rapid Cooled	92*

Plate, 3/8 to 2 in. (9.5 to 50.8 mm) thick	Heat Treated at 2150°F (1177°C), Rapid Cooled	89*

*Based on 58-65 tests

Average Hardness, Welded Sheet

Weld Method	Test Area	Average Hardness, Rockwell B

Shielded Metal Arc (covered electrodes)	Weld area	92

	Heat-affected zone	93

	Base metal	91

Gas Tungsten Arc (TIG)	Weld area	89

	Heat-affected zone	93

	Base metal	91

Gas Metal Arc (MIG)	Weld area	90

	Heat-affected zone	93

	Base metal	91

Note: Sheet was solution heat-treated prior to welding. Hardness was determinded at room temperature in the as-welded condition.

Aged Hardness, Room Temperature*

	Aging Temperature		Aging Time,	Hardness, Rockwell A
Form	°F	°C	Hours	Hardness, Rockwell A

Sheet	SHT		-	54

	1200	649	1000	56

			4000	62

			8000	63

	1400	760	1000	62

			4000	61

			8000	60

	1600	871	1000	61

			4000	58

			8000	55

Plate	SHT		-	54

	1200	649	1000	57

			4000	62

			8000	63

	1400	760	1000	60

			4000	59

			8000	58

	1600	871	1000	56

			4000	56

			8000	54

All Weld Metal**	1200	649	1000	64

			4000	65

			8000	63

	1400	760	1000	62

			4000	60

			8000	60

	1600	871	1000	56

			4000	55

			8000	54

SHT = Solution heat-treated (not aged)
* Single tests from a single heat for each form
** Gas Tungsten arc welded

Formability, Sheet

	Typical Olsen cup depth,
Condition	in.	mm

Heat Treated at 2150°F (1177°C), Rapid Cooled	0.48	12.3

Average Impact Strength, Plate

	Test Temperature		Average Charpy V-Notch Impact Strength
Condition	°F	°C	Ft. lb.	Joules

Heat Treated at 2150°F (1177°C), Rapid Cooled	-321	-196	37	50

	-216	-157	44	60

	-108	-78	51	69

	-20	-29	56	76

	Room		54	73

	1500	815	58	79

Average Impact Strength, Aged Plate*

Aging Temperature		Aging Time	Average Charpy V-Notch Impact Strength
°F	°C	Hours	ft.-lb.	Joules

SHT		-	95	129

1200	649	1000	24	33

		4000	12	16

		8000	15	20

1400	760	1000	10	14

		4000	10	14

		8000	8	11

1600	871	1000	15	20

		4000	12	16

		8000	15	20

		16000	12	16

SHT = Solution heat-treated (not aged)
* Average of four tests on 1/2-in. (12.7 mm) plate from a single heat.