Kanthal A-1 Resistance Wire 1400°C | FeCrAl Furnace Heating Wire
Kanthal A-1 resistance wire is a FeCrAl, or iron-chromium-aluminium alloy resistance wire used in industrial furnaces, ceramic kilns, glass furnaces and heating systems operating at high temperatures. Designed to convert electrical energy into heat energy, this wire is preferred in long-lasting resistance heating applications thanks to its high electrical resistivity and oxidation resistance.
Sales Information: This product is sold by kilogram (kg). The quantity you order is calculated on a kilogram basis. The approximate length per 1 kg, depending on wire diameter, is shown in the table below.
Product Type: Kanthal A-1 resistance wire
Country of Origin: Made in Sweden
Alloy Type: FeCrAl / Iron-Chromium-Aluminium
Maximum Operating Temperature: 1400°C
Applications
Kanthal A-1 resistance wire is used in furnace heating elements, heating wires, coiled resistance elements and custom heating element production where high-temperature resistance is required.
- Ceramic kiln resistance heating applications
- Glass furnaces and glass processing systems
- Industrial heat-treatment furnaces
- Iron, steel and metalworking industries
- Laboratory high-temperature furnaces
- Custom-made resistance and heating systems
Basic Technical Specifications
| Maximum Operating Temperature |
1400°C |
| Resistance / Electrical Resistivity |
1.45 Ω mm²/m |
| Density |
7.1 g/cm³ |
| Alloy Type |
FeCrAl - Iron, Chromium, Aluminium |
| Product Form |
Resistance wire |
| Sales Unit |
Kg |
Diameter, Weight and Approximate Length
Since Kanthal A-1 resistance wire is sold by weight, the approximate length of 1 kg varies depending on the wire diameter. The values below help you select the correct diameter and quantity before ordering.
| Wire Diameter |
Weight |
Approximate Length per 1 Kg |
| 3.5 mm |
68.33 grams/metre |
Approximately 14.6 metres |
| 3.0 mm |
50.20 grams/metre |
Approximately 19.9 metres |
| 2.5 mm |
34.92 grams/metre |
Approximately 28.6 metres |
| 2.0 mm |
22.30 grams/metre |
Approximately 44.8 metres |
| 1.5 mm |
12.50 grams/metre |
Approximately 80 metres |
| 1.2 mm |
8.03 grams/metre |
Approximately 124.5 metres |
| 1.0 mm |
5.58 grams/metre |
Approximately 179.2 metres |
* Length values are calculated according to theoretical weight values. Minor differences may occur due to cutting, weighing and manufacturing tolerances.
Maximum Application Temperatures by Furnace Atmosphere
| Atmosphere Type |
Environment Details |
Maximum Temperature |
| Oxidising |
Air, dry |
1400°C |
| Air, humid |
1200°C |
| Neutral |
Nitrogen - N₂ |
1200°C |
| Argon - Ar |
1400°C |
| Exothermic atmosphere |
1150°C |
| Reducing |
Endothermic atmosphere |
1050°C |
| Hydrogen - H₂ |
1400°C |
| Dissociated ammonia |
1200°C |
| Vacuum |
10⁻³ torr |
1150°C |
Resistance Change Depending on Temperature
As the temperature of Kanthal A-1 resistance wire increases, its resistance value changes by a certain ratio. The Ct table below shows the temperature-dependent resistance correction factors.
| °C |
20 |
100 |
400 |
600 |
800 |
1000 |
1200 |
1400 |
| Ct |
1.00 |
1.00 |
1.00 |
1.02 |
1.03 |
1.04 |
1.04 |
1.05 |
* Ct values are provided as reference values for Kanthal A-1.
Points to Consider When Selecting the Correct Resistance Wire
- The wire diameter should be selected according to the operating temperature of the furnace.
- Voltage, power, wire length, coil diameter and furnace atmosphere should be evaluated together when calculating the heating element.
- For ceramic kiln resistance wire replacement, the existing wire diameter and coil dimensions should be checked.
- Since the product is sold by kilogram, the approximate required length should be calculated before ordering.
Important Note
- As the product is cut to order, returns are not accepted. Please check the wire diameter and kilogram quantity before placing your order.
- This product belongs to the Kanthal A-1 series. The APM series is a different product group and has a different maximum operating temperature.
- Dissociated ammonia and certain special furnace atmospheres may reduce the permitted maximum operating temperature.
Frequently Asked Questions
Up to what temperature can Kanthal A-1 resistance wire be used? Kanthal A-1 resistance wire can be used at temperatures up to 1400°C under suitable atmospheric conditions.
Is this resistance wire sold by metre or by kilogram? This product is sold by kilogram. The approximate length per 1 kg varies depending on the wire diameter.
Can it be used in ceramic kilns? Yes. Kanthal A-1 is a high-temperature-resistant alloy widely used for resistance wires and coiled heating elements in ceramic kilns.
How many metres are there in 1 kg of Kanthal A-1 resistance wire? It depends on the wire diameter. For example, 2.0 mm wire is approximately 44.8 metres per kilogram, while 1.0 mm wire is approximately 179.2 metres per kilogram.