Проволока из нагревательного сплава FeCrAl

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FeCrAl 0cr21al4  0cr25al5 Resistance Heating Alloy Wire

 

 

The high aluminum content, in combination with the high chromium content let the scaling temperature can reach to 1425ºC (2600ºF);

 

heating wires shaped by means of high speed automatic cooling machine of which the power capacity is controlled by computer, they are available as wire and ribbon.

 

Heating resistance alloy wire product forms and size range 

 

Round wire 

0.010-12 mm (0.00039-0.472 inch) other sizes are available on request.

 

Ribbon (flat wire) 

Thickness: 0.023-0.8 mm (0.0009-0.031 inch) 

Width: 0.038-4 mm (0.0015-0.157 inch) 

Width/thickness ratio max 60, depending on alloy and tolerance 

Other sizes are available on request.

 

Resistance electric heating wire has strong antioxidant properties, but a variety of gases in furnaces such as air, carbon, sulfur, hydrogen and nitrogen atmosphere, still have a certain impact on it. 

 

Although these heating wires all have had antioxidant treatment, the transportation, winding, installation and other process will cause damage to a certain extent and reduce its service life.

 

In order to extend the service life, customers need to do pre oxidation treatment before using.This methos is to heat alloy elements with have installed completely in the dry air to the temperature  (lower 100-200C than its maximum using temperature), heat preservation for 5 to 10 hours, then cooling slowly with furnace.

 

Heating resistance alloy wire features and advantages

1. High using temperature, the maximum using temperature can reach 1400C (0Cr21A16Nb, 0Cr27A17Mo2, etc.)

2. Low temperature coefficient of resistance

3. Lower thermal expansion coefficient than the Ni-base super-alloys.

4. High electrical resistivity

5. Good corrosion resistance under high temperature, especially under the atmosphere containing sulfides 

6. High surface load
7. Creep-resistant 

8. Lower raw-material cost, Lower density and cheaper price compared with Nichrome wire.

9. Superior oxidation resistance at 800-1300ºC

10. Long service life

 

Application of heating resistance alloy wire

 

Our products (FeCrAl) high resistance electric heating wire materials are salable and widely used for making heating equipment like industrial furnace, civil heating appliance, various electrical resistors and locomotive braking resistor, infrared equipment, liquefied gas infrared heat-resisting net, different kinds of igniting and radiating electrodes and voltage-regulating resistors for motors and so on in Metallurgical machinery, medical, chemical, ceramics, electronics, electrical appliance, glass and other civil or industrial fields.

 

Main characteristics of heating resistance alloy wire

		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 amount	opportune amount	opportune amount	opportune amount	opportune amount	opportune amount	opportune amount
	Fe	Rest	Rest	Rest	Rest	Rest	Rest	Rest
							Nb0.5	Mo1.8-2.2
Max.continuous service temp.of element (℃)		950	1250	1250	1250	1100	1350	1400
Resistivity μΩ.m,20℃		1.25	1.42	1.42	1.35	1.23	1.45	1.53
Density (g/cm3 )		7.4	7.10	7.16	7.25	7.35	7.10	7.10
Thermal conductivity KJ/m.h.℃		52.7	46.1	63.2	60.2	46.9	46.1	45.2
Coefficient of lines expansion α×10-6/℃		15.4	16.0	14.7	15.0	13.5	16.0	16.0
Melting point℃		1450	1500	1500	1500	1500	1510	1520
Tensile strength Mpa		580-680	630-780	630-780	630-780	600-700	650-800	680-830
Elongation at rupture %		>16	>12	>12	>12	>12	>12	>10
Variation of area %		65-75	60-75	65-75	65-75	65-75	65-75	65-75
Repeat bending frequency(F/R)		>5	>5	>5	>5	>5	>5	>5
Hardness(H.B.)		200-260	200-260	200-260	200-260	200-260	200-260	200-260
Micrographic structure		Ferrite	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite
Magnetic properties		Magnetic	Magnetic	Magnetic	Magnetic	Magnetic	Magnetic	Magnetic

 

pictures of heating resistance alloy wire

 

 

 

  

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