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CrAl 25-5 Resistance Wire/Resistance Strip
FeCrAl alloy (Iron-Chromium-Aluminum) is a high-temperature resistance alloy composed primarily of iron, chromium, and aluminum, with small amounts of other elements such as silicon and manganese. These alloys are widely used in applications that require high resistance to oxidation and excellent heat resistance, making them ideal for use in electric heating elements, industrial furnaces, and high-temperature applications like heating coils, radiant heaters, and thermocouples.
1.Key Properties of FeCrAl Alloy:
1.High Resistivity: FeCrAl alloys have a high electrical resistivity, which makes them efficient for use in heating elements.
2.Excellent Oxidation Resistance: The aluminum content forms a stable oxide layer on the surface, providing strong protection against oxidation even at high temperatures.
2.Excellent Oxidation Resistance: The aluminum content forms a stable oxide layer on the surface, providing strong protection against oxidation even at high temperatures.
3.High Temperature Strength: They retain their mechanical strength and dimensional stability at elevated temperatures, making them suitable for high-heat environments.
4.Good Formability: FeCrAl alloys can be easily fabricated into wires, ribbons, or other shapes used for electrical heating.
5.Corrosion Resistance: The alloy resists corrosion in a variety of environments, adding to its durability.
3. Data Sheet
|
Grade
|
0Cr25Al5
|
|
|
Nominal
composition %
|
Cr
|
23.0-26.0
|
|
Al
|
4.5-6.5
|
|
|
Re
|
opportune
|
|
|
Fe
|
Bal.
|
|
|
Max continuous operating temperature(°C)
|
1300
|
|
|
Resisivity 20°C (Ωmm2/m)
|
1.42
|
|
|
Density(g/cm3)
|
7.1
|
|
|
Thermal Conductivity at 20 ℃，W/(m·K)
|
0.46
|
|
|
Linear Expansion Coefficient(×10-/℃) 20-100°C
|
16
|
|
|
Approximate Melting Point(°C)
|
1500
|
|
|
Tensile Strength (N/mm²)
|
630-780
|
|
|
Elongation (%)
|
>12
|
|
|
Section Variation Shrink Rate (%)
|
65-75
|
|
|
Repeatedly Bend Frequency(F/R)
|
>5
|
|
|
Hardness(H.B.)
|
200-260
|
|
|
Micrographic Structure
|
Ferrite
|
|
|
Fast Life(h/C)
|
≥80/1300
|
|
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