Kanthal imported electric heating wire, the main raw materials are all manufactured and sent from the headquarters in Sweden, JINBAO has an appropriate amount of stock for sales and its own production use, so as to be close to customers and shorten the delivery time. Compared with domestic heating wires, imported heating wires have the following advantages:
1. Longer service life (2~4 times);
2. Lower density;
3. Higher resistivity;
4. The load per unit area is higher than that of domestic silk;
5. Excellent anti-oxidation performance, will not produce oxide chips, oxides can contaminate goods and electric furnaces, and may also cause short circuits or failures of electric heating elements and gas burners.
Imported heating wires have some advantages over domestic heating wires, but regardless of whether the domestic heating wires or imported heating wires are used incorrectly, it is easy to shorten the service life of the heating wires. So how should we use or operate the heating wire element to last longer, some suggestions are as follows:
1. Avoid temperature changes:
The operating life of the heating element (Kangtels) will be reduced with a few sentences of temperature changes, so a temperature-stable power control device should be selected.
2. Choose thicker components (Kangtaiers) materials:
The thickness of the material has a direct impact on the life of the component. As the line increases directly, there will be more alloy components per unit on the surface that can form new oxides. Therefore, at a certain temperature, the life of the thicker wire-shaped element (Kantair) is longer, and similarly, the life of the thicker ribbon is also longer than that of the thinner.
3. Adjust the temperature of the components (Kangtaiers) according to the atmosphere of the electric furnace:
The atmosphere of some common electric furnaces has an influence on the maximum operating temperature of heating elements. Due to the danger of "green corrosion" at 800~950℃ and 1470~1740℃, Ni-Cr Kangtal wire should not be used in electric furnaces containing carbon monoxide protective atmosphere. In these cases, it is recommended to use Kangtaier alloy wire, but the heating element must be pre-oxidized at 1050℃ to 1920℃ for 7-10 hours, and the heating element should be re-oxidized regularly.
4. Avoid the corrosion of solid, fluid and gas electric furnace:
Atmospheric impurities, such as oil, dust, volatile substances, or carbon deposits, can damage heating elements. Sulfur is harmful to all nickel alloys. Chlorine in different states will damage Kanthal wire and nickel-chromium Kanthal wire alloy. Metal solution or salt may also harm heating elements (Kangthal wire).
The main parameters of the Kanthair heating wire imported from Sweden are as follows:
Name and parameters
KANTHAL APM
KANTHAL A-1
KANTHAL AF
KANTHAL D
NIKROTHAL 80
NIKROTHAL 70
NIKROTHAL 60
NIKROTHAL 40
Maximum continuous operating temperature
°C
1425
1400
1300
1300
1200
1250
1150
1100
content
%Cr
twenty two
twenty two
twenty two
twenty two
20
30
15
20
Al
5.8
5.8
5.3
4.8
-
-
-
-
Fe
Remaining ingredients
Remaining ingredients
Remaining ingredients
Remaining ingredients
-
5%
Remaining ingredients
Remaining ingredients
Ni
-
-
-
-
Remaining ingredients
Remaining ingredients
60
35
Resistivity at 20℃
Ωmm-2m-1
1.45
1.45
1.39
1.35
1.09
1.18
1.11
1.04
density
g/cm3
7.10
7.10
7.15
7.25
8.3
8.1
8.2
7.9
Coefficient of thermal expansion, K-1
20-750°C
14x10-6
14x10-6
14x10-6
14x10-6
16x10-6
16x10-6
16x10-6
18x10-6
20-1000℃
15x10-6
15x10-6
15x10-6
15x10-6
17x10-6
17x10-6
17x10-6
19x10-6
Thermal conductivity at 20℃
Wm-1K-1
13
13
13
13
15
13
13
13
Specific heat capacity at 20℃
KJkg-1K-1
0.46
0.46
0.46
0.46
0.46
0.46
0.46
0.50
Melting point
°C
1500
1500
1500
1500
1400
1380
1390
1390
tensile strength
N mm-2
680
680
680
650
810
820
730
675
Yield point
N mm-2
470
475
475
450
420
430
370
340
hardness
Hv
230
230
230
230
180
185
180
180
Elongation at break
%
20
18
18
18
30
30
35
35
Tensile strength at 900℃
N mm-2
40
34
37
34
100
120
100
120
Creep resistance at 800℃
N mm-2
11
6
8
6
15
15
15
20
At 1000°C
N mm-2
3.4
1
1.5
1
4
4
4
4
Magnetic properties
-
Magnetism (Curie temperature 600℃)
without
without
slight
without
without
without
without
Emissivity, full oxidation
-
0.70
0.70
0.70
0.70
0.88
0.88
0.88
0.88
