0.55mm (23 AWG) | KA1 FeCrAl A1 Round Wire


0.55mm FeCrAl A1 round wire refers to a type of wire that is made of an alloy composed of iron, chromium, and aluminum (FeCrAl A1). The wire has a circular cross-section with a diameter of 0.55 millimetres.

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FeCrAl A1 Round Wire

The Crazy Wire Company are best known and long established as Europe’s preferred suppliers of top quality FeCrAl A1 round wire. We have enormous stock levels at all times as we use this wire to weave our mesh products.

0.55mm FeCrAl A1 round wire refers to a type of wire that is made of an alloy composed of iron, chromium, and aluminum (FeCrAl A1). The wire has a circular cross-section with a diameter of 0.55 millimetres.

FeCrAl A1 is a high-resistance alloy that is known for its excellent corrosion resistance, high-temperature strength, and long life span. It is commonly used in heating elements, such as in electric ovens, toasters, and other appliances that require high-temperature heating.

Technical Specification:

  • Diameter – 0.55mm (550 Micron – 23 AWG)
  • Ohms/ft – 5.96
  • 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

What Is Round Wire?

Round wire refers to a type of wire that has a circular cross-section, as opposed to other shapes like square, rectangular, or hexagonal. It is one of the most common forms of wire and is widely used in a variety of applications, such as electrical wiring, jewellery making, and crafting.

Round wire can be made from a variety of materials, including metals like copper, aluminium, brass, and stainless steel, as well as non-metal materials like nylon, polyester, and silk. The diameter of the wire can range from very thin (e.g. less than 0.1 mm) to very thick (e.g. several millimetres in diameter), depending on the application.

Which Is Better Round Wire Or Flat Wire?

Whether round wire or flat wire is better depends on the specific application and the intended use of the wire. Each type of wire has its own unique set of properties and advantages, which may make it more suitable for certain applications.

Round wire has the advantage of being easy to manufacture, bend, and shape, making it a popular choice for a wide range of applications. It also has a uniform cross-section, which can make it easier to work with and more predictable in terms of its behaviour under stress. In addition, round wire is generally stronger than flat wire of the same material and size.

Flat wire, on the other hand, has a wider surface area than round wire, which can provide better electrical conductivity and heat dissipation in certain applications. It can also be more flexible and easier to wrap around curved surfaces. Additionally, flat wire can be stacked or wound in multiple layers to increase its strength and durability.

Does KA1 Wire Rust?

KA1 is an alloy made of iron, chromium, and aluminium. This type of wire is known for its high-temperature resistance, high electrical resistance, and excellent corrosion resistance. As a result, KA1 wire does not easily rust.

The chromium content in KA1 wire is particularly effective at preventing rust, as it forms a protective layer of chromium oxide on the surface of the wire that prevents further oxidation. This oxide layer also helps to enhance the wire’s corrosion resistance and durability.

However, it is important to note that KA1 wire can still corrode if exposed to certain corrosive agents, such as strong acids or bases.

What Is Equivalent To KA1?

KA1 is a specific type of resistance wire alloy made of iron, chromium, and aluminium. It is known for its high-temperature resistance, high electrical resistance, and good corrosion resistance.

There are other types of resistance wire alloys available that can be used as an alternative to KA1. These include:

  1. Nichrome (NiCr): This is an alloy made of nickel and chromium and is widely used in heating applications due to its high-temperature resistance and electrical conductivity.
  2. Stainless Steel (SS): This is a steel alloy that contains chromium and other elements such as nickel and molybdenum. Stainless steel is known for its high resistance to corrosion, heat, and chemical damage, making it a good choice for many applications.
  3. FeCrAl D: This is another type of resistance wire alloy that is made of iron, chromium, and aluminium, but with a slightly different composition than KA1. It is known for its high-temperature resistance, good corrosion resistance, and good electrical conductivity.
  4. Cupronickel (CuNi): This is an alloy made of copper and nickel and is often used in heating applications due to its high electrical resistance and good thermal conductivity.



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)


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