FeCrAl resistance Alloys

FeCrAl Resistance Alloy has high resistance, low temperature coefficient of electric resistance, high operating temperature, and good corrosion resistance under high temperature, especially under the atmosphere containing sulfides.

FeCrAl Resistance Alloy possesses good oxidation and heat resistance.it is creep-resistant over a wide range of temperature.  This series of resistance alloy has several potential advantages, such as lower raw-material cost, superior oxidation resistance, lower density, and lower thermal expansion coefficient than the Ni-base super-alloys.

FeCrAl Resistance Alloy has less hot strength than nickel s but much higher melting point and lower price. After being heated the Resistance Wire's plasticity becomes bad, easy brittleness, not to be easy to weld. However, If can be reasonably used, also be a kind of ideal electric heating material.

FeCrAl Resistance Alloys are made of iron chromium aluminum base s containing small amounts of reactive elements such as yttrium and zirconium. The high aluminum content, in combination with the high chromium content causes the scaling temperature to increase up to 1425 C (2600F ); FeCrAl Heat Resistance Resistance Wire s also have excellent oxidation properties at 800-1300° C because of the formation of a highly protective Al2O3 scale.

Type		1Cr13Al4	0Cr25Al5	0Cr21Al6	0Cr23Al5	0Cr21Al4	0Cr21Al6Nb	0Cr27Al7Mo2
Main Chemical composition	Cr	12.0-15.0	23.0-26.0	19.0-22.0	22.5-24.5	18.0-21.0	21.0-23.0	26.5-27.8
	Al	4.0-6.0	4.5-6.5	5.0-7.0	4.2-5.0	3.0-4.2	5.0-7.0	6.0-7.0
	Re	opportune	opportune	opportune	opportune	opportune	opportune	opportune
	Fe	Rest	Rest	Rest	Rest	Rest	Rest	Rest
Maximal Temperature (°C)		650	1250	1250	1250	1100	1350	1400
Resistivity 20°C (10-6ohm*m)		1.25	1.42	1.42	1.35	1.23	1.45	1.53
Density(g/cm3)		7.4	7.1	7.16	7.25	7.35	7.1	7.1
Thermal conductivity (KJ/m*h*°C)		52.7	46.1	63.2	60.2	46.9	46.1	45.2
Extend strength (a*10-6/°C)		15.4	16	14.7	15	13.5	16	16
Melting point ( °C)		1450	1500	1500	1500	1500	1510	1520
Tensile strength(N/mm2)		588-735	630-780	637-780	630-780	637-784	650-800	680-830
Extension rate%		>16	>12	>12	>12	>12	>12	>10
Section shrink rate (%)		65-75	60-75	65-75	65-75	65-75	65-75	65-75
Repeatedly bending frequency (F/R)		>5	>5	>5	>5	>5	>5	>5
Specific heat J/g.		0.49	0.494	0.52	0.46	0.49	0.494	0.494
Linear expansion coefficient a×10-6/201000		15.4	16	14.7	15	13.5	16	16
hardness (H.B.)		200-260	200-260	200-260	200-260	200-260	200-260	200-260
Rapid life h/			≥80/1250	≥80/1300	≥80/1300	≥80/1300	≥80/1350	≥80/1350
Microstructure		Ferrite	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite
Magnetism		Magnetic	Magnetic	Magnetic	Magnetic	Magnetic	Magnetic	Magnetic

         





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