	Temp., °F	British Units	Temp., °C	Metric Units
Density	Room	0.297 lb/in.³	Room	8.23 g/cm.³
Melting Temperature	2425-2480		1330-1415

Electrical Resistivity	Room	37.5 microhm-in.	Room	95.2 microhm-cm
	200	38.7 microhm-in.	100	98.6 microhm-cm
	400	40.5 microhm-in.	200	102.6 microhm-cm
	600	42.1 microhm-in.	300	106.5 microhm-cm
	800	43.5 microhm-in.	400	109.5 microhm-cm
	1000	44.7 microhm-in.	500	112.5 microhm-cm
	1200	45.7 microhm-in.	600	115.1 microhm-cm
	1400	46.6 microhm-in.	700	117.2 microhm-cm
	1600	47.3 microhm-in.	800	119.0 microhm-cm
	1800	48.0 microhm-in.	900	120.7 microhm-cm
	2000	48.6 microhm-in.	1000	122.3 microhm-cm
			1100	123.7 microhm-cm

Mean Coefficient of Thermal Expansion	70-200	8.1 microinches/in.-°F	25-100	14.7 x 10^-6m/m-°C
	70-400	8.2 microinches/in.-°F	25-200	14.9 x 10^-6m/m-°C
	70-600	8.4 microinches/in.-°F	25-300	15.1 x 10^-6m/m-°C
	70-800	8.6 microinches/in.-°F	25-400	15.4 x 10^-6m/m-°C
	70-1000	8.8 microinches/in.-°F	25-500	15.7 x 10^-6m/m-°C
	70-1200	9.0 microinches/in.-°F	25-600	16.1 x 10^-6m/m-°C
	70-1400	9.2 microinches/in.-°F	25-700	16.4 x 10^-6m/m-°C
	70-1600	9.4 microinches/in.-°F	25-800	16.7 x 10^-6m/m-°C
	70-1800	9.5 microinches/in.-°F	25-900	17.0 x 10^-6m/m-°C
	70-2000	9.6 microinches/in.-°F	25-1000	17.1 x 10^-6m/m-°C
			25-1100	17.1 x 10^-6m/m-°C

Thermal Diffusivity	Room	4.5 x 10^-3 in.²/sec.	Room	28.7 x 10^-3 cm²/sec.
	200	4.8 x 10^-3 in.²/sec.	100	31.2 x 10^-3 cm²/sec.
	400	5.3 x 10^-3 in.²/sec.	200	34.2 x 10^-3 cm²/sec.
	600	5.8 x 10^-3 in.²/sec.	300	37.0 x 10^-3 cm²/sec.
	800	6.3 x 10^-3 in.²/sec.	400	39.7 x 10^-3 cm²/sec.
	1000	6.7 x 10^-3 in.²/sec.	500	42.3 x 10^-3 cm²/sec.
	1200	7.1 x 10^-3 in.²/sec.	600	44.8 x 10^-3 cm²/sec.
	1400	7.5 x 10^-3 in.²/sec.	700	47.0 x 10^-3 cm²/sec.
	1600	7.7 x 10^-3 in.²/sec.	800	48.8 x 10^-3 cm²/sec.
	1800	8.0 x 10^-3 in.²/sec.	900	50.3 x 10^-3 cm²/sec.
	2000	8.2 x 10^-3 in.²/sec.	1000	51.6 x 10^-3 cm²/sec.
			1100	52.8 x 10^-3 cm²/sec.

Thermal Conductivity	Room	77 Btu-in./ft.² hr.-°F	Room	11.1 W/m-K
	200	90 Btu-in./ft.² hr.-°F	100	13.1 W/m-K
	400	107 Btu-in./ft.² hr.-°F	200	15.4 W/m-K
	600	122 Btu-in./ft.² hr.-°F	300	17.3 W/m-K
	800	135 Btu-in./ft.² hr.-°F	400	19.0 W/m-K
	1000	148 Btu-in./ft.² hr.-°F	500	20.8 W/m-K
	1200	160 Btu-in./ft.² hr.-°F	600	22.4 W/m-K
	1400	173 Btu-in./ft.² hr.-°F	700	24.0 W/m-K
	1600	185 Btu-in./ft.² hr.-°F	800	25.5 W/m-K
	1800	197 Btu-in./ft.² hr.-°F	900	27.2 W/m-K
	2000	210 Btu-in./ft.² hr.-°F	1000	28.9 W/m-K
			1100	30.4 W/m-K

Specific Heat	Room	0.111 Btu/lb.-°F	Room	464 J/kg-K
	200	0.113 Btu/lb.-°F	100	475 J/kg-K
	400	0.118 Btu/lb.-°F	200	493 J/kg-K
	600	0.122 Btu/lb.-°F	300	508 J/kg-K
	800	0.126 Btu/lb.-°F	400	523 J/kg-K
	1000	0.130 Btu/lb.-°F	500	538 J/kg-K
	1200	0.133 Btu/lb.-°F	600	552 J/kg-K
	1400	0.135 Btu/lb.-°F	700	561 J/kg-K
	1600	0.140 Btu/lb.-°F	800	570 J/kg-K
	1800	0.147 Btu/lb.-°F	900	595 J/kg-K
	2000	0.152 Btu/lb.-°F	1000	618 J/kg-K
	-	-	1100	638 J/kg-K

Haynes International, Inc. 800-354-0806 765-456-6012

HAYNES® 556® alloy Information

An iron-nickel-chromium-cobalt alloy that combines effective resistance to sulfidizing, carburizing and chlorine-bearing environments with good oxidation resistance, fabricability and excellent high-temperature strength.

HAYNES^® 556^®alloy Information

An iron-nickel-chromium-cobalt alloy that combines effective resistance to sulfidizing,
carburizing and chlorine-bearing environments with good oxidation resistance,
fabricability and excellent high-temperature strength.