Resistance heating strip
Kanthal® (FeCrAl), Nikrothal® (NiCr), and Cuprothal® 49 (CuNi), universally known as Constantan, resistance heating alloys are available in strip form designed for high-temperature applications across various industries. These alloys ensure precision, durability, and performance in demanding heating environments.
Versatile sizing for precise application needs
Kanthal’s resistance heating strip is available in standard sizes ranging from 0.10 to 3.5 mm (0.0039 to 0.1378 inch) in thickness and 4 to 195 mm (0.157 to 7.68 inch) in width. This wide range allows for optimized material selection, ensuring the right balance of performance and longevity for each specific application.
Reliable performance and process efficiency
With consistent resistivity across production batches, Kanthal’s strip materials provide predictable and stable performance, enabling trouble-free manufacturing and high-quality end products. This reliability helps manufacturers streamline processes and maintain uniform heating efficiency in industrial applications.
Optimized strip thickness for longevity
The thickness of the strip directly impacts its lifespan. A minimum strip thickness of 2 mm is generally recommended to extend durability. A thicker strip increases the service life and enhances resistance to thermal and mechanical stress.
Element design: Maximizing performance
Heating element design significantly affects heat distribution and surface load capacity. More freely radiating element designs allow for higher maximum surface loads, optimizing efficiency. Proper design with the right strip thickness, ensures long-lasting and high-performance heating solutions for industrial applications.
Information
Our wide range of resistance heating alloys in strip form makes it possible to select the most appropriate grade and size for each respective application, resulting in optimum end-product performance. The consistent resistivity from delivery to delivery facilitates trouble-free production.
Resistance heating alloys in strip form
| Type of alloy | Description |
|---|---|
| Kanthal® and Alkrothal® FeCrAl alloys* | High-resistivity iron-chromium-aluminium alloys for use up to 1,400ºC (2,550ºF). |
| Nikrothal® NiCr alloys | High-resistivity nickel-chromium alloys for use up to 300ºC (570ºF). |
| Cuprothal® CuNi alloys | Medium- and low-resistivity copper-nickel alloys for use up to 150ºC (300ºF). |
* Kanthal® FeCrAl alloys are available as both conventional alloys and powder metallurgical alloys (Kanthal® APM).
Characteristics
Size range
Thickness: 0.10-4 mm (0.00394-0.157 inch)
Width: 4-200 mm (0.157-7.874 inch)
Other sizes can be delivered on request.
Resistance tolerance
Standard resistance tolerance for strip is ± 5%, but strip with closer resistance tolerance can be delivered on request.
Delivery forms
Kanthal® resistance heating strip is supplied in coils with an internal diameter of Ø 400 mm or in straightened lengths.
Marking
Each coil of strip is supplied with a label or tag showing alloy type, nominal size, tara and net weight, resistance Ω/m (Ω /ft) and charge number
| Kanthal® grade | Max. cont. operating temp. ºC/ºF | Resistivity at 20ºC (68ºF) Ώ mm2m-1 / 68ºF Ώ/cmf |
|---|---|---|
| FeCrAl alloys | ||
| Kanthal® APM | 1,425/2,600 | 1.45/872 |
| Kanthal® A-1 | 1,400/2,550 | 1.45/872 |
| Kanthal® AF | 1,300/2,370 | 1.39/836 |
| Kanthal® D | 1,300/2,370 | 1.35/812 |
| Alkrothal® 14 | 1,100/2,010 | 1.25/744 |
| NiCr alloys | ||
| Nikrothal® 80 | 1,200/2,190 | 1.09/656 |
| Nikrothal® 70 | 1,250/2,280 | 1.18/709 |
| Nikrothal® 60 | 1,150/2,100 | 1.11/668 |
| Nikrothal® 40 | 1,100/2,010 | 1.04/626 |
| CuNi alloys | ||
| Cuprothal® 49 | 600/1,110 | 0.49/295 |