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Description

Fe-Cr-Al alloy wires and Resistance Wire Heating Element are made of iron chromium aluminum base alloys containing small amounts of reactive elements such as yttrium and zirconium and produced by smelting, steel rolling, forging, annealing, drawing, surface treatment, resistance control test, etc.

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.

Specifications

Alloy Nomenclature Performance		Cr₂₀Ni₈₀	Cr₃₀Ni₇₀	Cr₁₅Ni₆₀	Cr₂₀Ni₃₅	Cr₂₀Ni₃₀
Main chemical composition (%)	Ni	Rest	Rest	55.0-61.0	34.0-37.0	30.0-34.0
	Cr	20.0-23.0	28.0-31.0	15.0-18.0	18.0-21.0	18.0-21.0
	Fe	≤1.0	≤1.0	Rest	Rest	Rest
Max. continuous service temp. of element (ºC)		1200	1250	1150	1100	1100
Resistivity at 20ºC (μΩ·m)		1.09	1.18	1.12	1	1.04
Density (g/cm3)		8.4	8.1	8.2	7.9	7.9
Thermal conductivity (KJ/m·h·ºC)		60.3	45.2	45.2	43.8	43.8
Coefficient of lines expansion (α×10-6/ºC)		18	17	17	19	19
Melting point (approx.) (ºC)		1400	1380	1390	1390	1390
Elongation at rupture (%)		>20	>20	>20	>20	>20
Micrographic structure		austenite	austenite	austenite	austenite	austenite
Magnetic properties		nonmagnetic	nonmagnetic	Weak magnetic	Weak magnetic	Weak magnetic

Round wire: diameter 0.03mm-10.0mm

Flat wire: thickness 0.2mm-1.0mm, width 0.08mm-40.0mm

Surface Effects

Other Production Photos

Part of Appliations of Resistance wire heating element

Chrome nickel wire resistance is widely used for making electric heating elements in home appliances and industrial furnaces.,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.

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