0.42mm (26 AWG) KA1 Electrical Wire (FeCrAl A1)


0.42mm FeCrAl A1 wire is a type of electrical wire made of an iron-chromium-aluminium alloy. The wire has a diameter of 0.42mm and is commonly used in applications that require high electrical resistance and high-temperature resistance.

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KA1 Electrical Wire

The Crazy Wire Company are best known and long established as Europe’s preferred suppliers of top quality KA1 electrical wire. We have enormous stock levels at all times as we use this wire to weave our mesh products.

0.42mm FeCrAl A1 wire is a type of electrical wire made of an iron-chromium-aluminium alloy. The wire has a diameter of 0.42mm and is commonly used in applications that require high electrical resistance and high-temperature resistance. FeCrAl A1 wire is known for its excellent oxidation resistance, which makes it suitable for use in high-temperature environments. The wire is also easy to work with and can be easily shaped and bent into different configurations. FeCrAl A1 wire is commonly used in various electrical applications, including heating elements, resistors, and other high-temperature applications. The wire is also used in the manufacturing of electrical coils, heating elements, and other electrical components that require high-temperature and high-corrosion resistance.

Technical Specification:

  • Diameter – 0.42mm (420 Micron – 26 AWG)
  • Ohms/ft – 10.6
  • C = Min – 0% Max – 0.08%
  • Si = Min – 0% Max – 0.7%
  • Mn = Min – 0% Max – 0.4%
  • Cr = Min – 20.5% Max – 23.5%
  • Al = Nominal Comp – 5.8% – Min – 0% – Max – 0%
  • Fe = Balance

Available KA1 Options:

  • 1.15mm (17 AWG) – 1.35 ohms/m
  • 1.02mm (18 AWG) – 1.77 ohms/m
  • 0.9mm (19 AWG) – 2.15 ohms/m
  • 0.8mm (20 AWG) – 2.84 ohms/m
  • 0.7mm (21 AWG) – 3.58 ohms/m
  • 0.6mm (22 AWG) – 4.94 ohms/m
  • 0.65mm (22 AWG) – 4.26 ohms/m
  • 0.64mm (22 AWG)
  • 0.5mm (24 AWG) – 7.11 ohms/m
  • 0.55mm x 0.1mm – 26.05 ohms/m
  • 0.55mm (23 AWG) – 5.96 ohms/m
  • 0.4mm (26 AWG) – 11.46 ohms/m
  • 0.48mm (25 AWG) – 7.79 ohms/m
  • 0.45mm (25 AWG) – 8.93 ohms/m
  • 0.42mm (26 AWG) – 10.6 ohms/m
  • 0.3mm (29 AWG) -19.89 ohms/m
  • 0.38mm (27 AWG) – 12.79 ohms/m
  • 0.37mm (27 AWG) – 13.26 ohms/m
  • 0.35mm (27 AWG) – 14.69 ohms/m
  • 0.34mm (28 AWG) -15.15 ohms/m
  • 0.32mm (28 AWG) -17.46 ohms/m
  • 0.2mm (32 AWG) – 46.11 ohms/m
  • 0.28mm (30 AWG) – 22.75 ohms/m
  • 0.27mm (30 AWG) – 24.86 ohms/m
  • 0.25mm (30 AWG) – 29.29 ohms/m
  • 0.23mm (31 AWG) – 34.36 ohms/m
  • 0.21mm (32 AWG) – 40.44 ohms/m
  • 0.1mm x 0.2mm – 71.83 ohms/m
  • 0.1mm (38 AWG)
  • 0.18mm (33 AWG) – 56.98 ohms/m
  • 0.17mm (34 AWG) – 62.57 ohms/m
  • 0.15mm (34 AWG) – 82.52 ohms/m
  • 0.13mm (36 AWG) – 107.87 Ohms/m
  • 0.12mm (36 AWG)
  • 0.09mm (39 AWG) – 228.40 ohms/m
  • 0.08mm (40 AWG)
  • 0.07mm (41 AWG)
  • 0.06mm (42 AWG) – 496 ohms/m
  • 0.05mm (44 AWG) – 577 ohms/m

Why Use The Crazy Wire Company

  1. Quality of products: The Crazy Wire Company always  offer high-quality products that meet industry standards and customer expectations.
  2. Selection: We offer a wide variety of wire products and sizes to meet the diverse needs of our customers. We have more than 600 products available through our site and counting. 
  3. Price: We always offer the best value possible. Our wires are available as part of our major weaving processes, so it is bought at the best possible rate. 
  4. Availability: Our products are kept in house and are ready to ship immediately. 
  5. Customer service: Our experienced staff help our customers feel confident in their purchases and provide assistance when required. 

What Else Is Available?

We do not only offer KA1 round wire. We also have a huge range of stainless steel wire and Ni80 round wire in immediate stock too.

Ribbon wire and flat wire are stocked for immediate dispatch too.


FAQs About This Wire

Is A Higher Or Lower Resistance Wire Able To Heat Up More?

A higher resistance wire will generate more heat than a lower resistance wire for a given amount of electrical power. This is because the heat generated by a wire is proportional to the square of the current flowing through it, which in turn is proportional to the voltage applied to the wire divided by its resistance (Ohm’s law). Therefore, a higher resistance wire will have a greater voltage drop across it for a given amount of current, and thus will generate more heat.

For example, consider two wires with the same length and cross-sectional area, but different resistances. Let’s say that one wire has a resistance of 10 ohms, and the other wire has a resistance of 5 ohms. If the same amount of electrical power is applied to both wires, the wire with the higher resistance (10 ohms) will generate twice as much heat as the wire with the lower resistance (5 ohms), because the voltage drop across the higher resistance wire will be twice as much as that of the lower resistance wire.

What Is High Temp Wire?

High temp wire, also known as high-temperature wire, is a type of wire that is specifically designed to withstand high temperatures without degrading or melting. This wire is typically used in applications where extreme temperatures are present, such as in ovens, furnaces, industrial heaters, and other high-temperature environments.
High temp wire is typically made of alloys such as Nickel-Chromium (NiCr), KA1, or other similar materials, which have high melting points and excellent resistance to oxidation and corrosion. These materials also have a high electrical resistance, which allows them to generate heat when an electric current is passed through them.
High temp wire can come in various forms, such as single-conductor wire, multi-conductor cable, and ribbon cable. It can also be coated or insulated with materials such as ceramic, silicone, or Teflon, which provide additional resistance to heat, chemicals, and abrasion.

How To Convert Voltage To Celsius Temperature?

To convert voltage to Celsius temperature, you need to know the temperature coefficient of the material being measured, which is a measure of how the material’s resistance changes with temperature. The formula to convert voltage to temperature is as follows:
1. Determine the resistance (R) of the material being measured using Ohm’s law, which states that resistance equals voltage divided by current (R = V/I).
2. Find the temperature coefficient of resistance (TCR) of the material. This is typically provided by the manufacturer of the material and is usually expressed in units of ohms per degree Celsius (Ω/°C).
3. Determine the reference resistance (R0) of the material at a known reference temperature (T0). This is typically provided by the manufacturer of the material and is usually expressed in units of ohms.
4. Use the following formula to calculate the temperature (T) in Celsius:
T = (R – R0) / (R0 x TCR) + T0
In this formula, R is the resistance of the material being measured, R0 is the reference resistance of the material at the reference temperature, TCR is the temperature coefficient of resistance, and T0 is the reference temperature in Celsius.
Overall, converting voltage to Celsius temperature requires knowledge of the resistance of the material being measured, as well as its temperature coefficient of resistance and reference resistance at a known reference temperature.

Can KA1 Be Used As A Resistance Wire In Electric Cooker?

Yes, KA1 wire can be used as a resistance wire in an electric cooker. KA1 is a type of heating element wire that is widely used in a variety of high-temperature heating applications, including electric stovetops and cookers.

KA1 is an alloy made primarily of iron, chromium, and Aluminium, which gives it a high melting point, excellent resistance to oxidation, and high electrical resistance. These properties make it ideal for use in high-temperature heating applications, including electric cookers.

KA1 heating elements are typically designed to operate at specific voltages and wattages, and it is important to use the correct wire gauge, element length, and element shape to ensure safe and effective operation. It is also important to follow the manufacturer’s instructions and safety guidelines when working with heating elements in an electric cooker or any other heating appliance.



The Crazy Wire Company is a leading UK based supplier of nichrome, FeCrAl, and stainless steel wires. We specialise in rapid delivery to any location around the country. Our factory is located in Warrington, which is the historic home of the UK’s wire industry.

Check out our blog ‘everything that you need to know about wires’   for more information on resistance wire in general. Our goal for our blogs and help guides is to answer as many questions as possible to help to explain the possibilities of mesh to our customers. 

We also offer similar products through our highly popular eBay store, check us out there too.

Contact our team today if you have any questions at all. We are always really keen to help in any way that we can. 

Additional information


10 Metres (33 Feet), 25 Metres (82.5 Feet), 50 Metres (166.66 Feet), 100 Metres (330 Feet), 200 Metres (660 Feet)


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