25 AWG KA1 Type (FeCrAl A1) Flat Wire (0.68mm x 0.27mm)


Our KA1 flat wire is available in various gauges, including 19 AWG (1.15 x 0.56mm), 20 AWG (1.03 x 0.5mm), 21 AWG (0.91 x 0.45mm), 22 AWG (0.81 x 0.4mm), and 25 AWG (0.68 x 0.27mm), catering to a wide range of project requirements.

Please Feel Free To Contact Our Team If You Have Any Questions At All. We Are Always Keen To Help In Any Way We Can.

✔ Huge Range Available

✔ Produced In Warrington, UK

✔ Shipped Within 24 Hours

✔ 30 Day Returns Accepted

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KA1 Type (FeCrAl A1) Resistance Flat Wire

KA1 Type (FeCrAl A1) resistance flat wire is a high-quality product designed for a range of applications that require durability and precision. This wire is made from FeCrAl A1 alloy, known for its high resistance and excellent performance in high-temperature environments. The flat profile of the wire increases the surface area, making it ideal for applications that demand efficient heat distribution and quick thermal response.

Our KA1 flat wire is available in various gauges, including 19 AWG (1.15 x 0.56mm), 20 AWG (1.03 x 0.5mm), 21 AWG (0.91 x 0.45mm), 22 AWG (0.81 x 0.4mm), and 25 AWG (0.68 x 0.27mm), catering to a wide range of project requirements. Whether it’s for intricate jewelry making, crafting, coil building in vaping devices, or electrical repairs, this wire provides the flexibility and strength needed for precise work.

The wire comes in two convenient lengths of 5 and 10 metres, allowing users to choose the best option for their projects without the worry of wastage or running short. This versatility ensures that whether you’re working on a small, detailed piece or a larger, more demanding project, you have the right amount of wire at your fingertips.

KA1 Type resistance flat wire stands out for its ability to perform exceptionally well in high-temperature conditions, making it a reliable choice for heating elements, electronic repairs, and DIY projects that require a durable and stable material. Its flat shape also allows for better contact with surfaces, which is crucial in applications where maximum heat transfer and even distribution are key.

At The Crazy Wire Company, we take pride in supplying a straightforward, effective product that meets the high standards our customers expect. Our KA1 flat wire is a testament to our commitment to quality, precision, and versatility, offering a dependable solution for a multitude of creative and technical needs.

Available Options:

  • 19 AWG: 1.15 x 0.56mm
  • 20 AWG: 1.03 x 0.5mm
  • 21 AWG: 0.91 x 0.45mm
  • 22 AWG: 0.81 x 0.4mm
  • 25 AWG: 0.68 x 0.27mm

We also offer the SS316L grade as round wire too if required.

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 SS316L wire. We also have a huge range of KA1and nichrome round wire in immediate stock too.

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


FAQs About This Wire

What Is The Resistance Range For KA1 Type Flat Wire?

KA1 Type (FeCrAl A1) flat wire has a variable resistance range depending on its gauge. Depending on the cross-sectional area, each size offers a different resistance. Thick wires (lower AWG number) will have a lower resistance per metre, while thinner wires (higher AWG number) will have a higher resistance per metre. Based on the dimensions and material resistivity, specific resistance values can be calculated. Typically, the resistance range of the flat wire gauges provided by The Crazy Wire Company will be adequate for precision applications, including those requiring stable resistances for accurate control.

Can KA1 Type Flat Wire Be Used For Industrial Heating Elements?

Yes, KA1 Type flat wire is suitable for industrial heating elements. KA1 wire is made from the FeCrAl A1 alloy, which has excellent properties for this purpose, including high electrical resistance and resistance to oxidation. Consequently, it is a reliable choice for heaters that require consistent and long-lasting performance. In industrial settings, the wire can be used in furnaces, kilns, and other heating devices to provide a stable and uniform heat output.

How Does The Flat Profile Of KA1 Wire Benefit Heat Distribution?

Due to its flat profile, KA1 wire provides a significant advantage in heat distribution in comparison to round wire due to its increased surface area in contact with the heated medium. As a result, heat is transferred more efficiently and uniformly, which is crucial for applications that require even heating. As a result of the broader surface, it has a quicker thermal response, making it an excellent choice for precision heating applications. In industrial and consumer applications where heat distribution and control are important, KA1 flat wire is a preferred option.



The Crazy Wire Company is a leading UK based supplier of nichromefecral, 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 Wire 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.

Additional information


5 Metres (16.5 Feet), 10 Metres (33 Feet)