0Cr27Al7Mo2 | HB SPECIAL ALLOY

0Cr27Al7Mo2 is a kind of super high temperature resistance heating alloy, this ferric Fe-Cr-Al alloy’s working temperature up to 1400℃. This alloy is almost equal to Х27Ю5Т (GOST). It is widely made into spiral heating spring used in the high temperature heat treatment furnace, and it can be made heating elements used in the electric radiant tube heater.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
–	0Cr27Al7Mo2	Х27Ю5Т	–	–	–	–	–	–	–	–

Chemical Composition, %

Alloy	C	Si	Mn	P	S	Cr	Ni	Al	Mo	Fe
0Cr27Al7Mo2	≤0.05	≤0.40	≤0.20	≤0.025	≤0.020	26.5-27.8	≤0.60	6.0-7.0	1.8-2.2	Bal

Mechanical Properties (RT, Annealed)

Tensile Strength, Rm/MPa	Elongation, A/%
Tensile Strength, Rm/MPa	Dia. >3.00mm (Wire) Thk. >0.20mm (Strip)	Dia. 0.10-3.00mm (Wire) Thk. ≤0.20mm (Strip)
≥680	≥10	≥10

Physical Properties

Max Working Temp., ℃	Melting Point, ℃	Density, g/cm3	Resistivity, μΩ·m 20℃	Specific Heat, J/(g•K)	Thermal Conductivity, W/(m•K) 20℃	Average Coefficient of Thermal Expansion,α×10-6/℃ 20-1000℃	Micrographic Structure	Magnetic Properties
1400	1520	7.10	1.53	0.49	13	16.0	Ferrite	Magnetic

Life Test

Test Temperature, ℃	Continuous Service Time Hours, ℃
1350	≥50

Temperature Factor of Resistivity

20℃	100℃	200℃	300℃	400℃	500℃	600℃	700℃	800℃	900℃	1000℃	1100℃	1200℃	1300℃
1.000	0.992	0.986	0.981	0.978	0.976	0.974	0.972	0.970	0.969	0.968	0.968	0.967	0.967

Available Products and Specifications

Rod, Bar, Wire and Forgings	GB/T 1234-2012, GOST 12766.1-1990, GOST 12766.3-1990, GOST 12766.4-1990, GOST 12766.5-1990
Plate, Sheet and Strip	GB/T 1234-2012, GOST 12766.2-1990
Pipe and Tube	–
Welding Product	–
Others	GOST 10994

Features

High resistivity
Low temperature coefficient of electric resistance
High working temperature
Excellent surface oxidation resistance under high temperature as well as in corrosive atmosphere
The unique combination of excellent oxidation properties and form stability contributes to long element service life