0.37mm (27 AWG) Ni90 Round Wire Nichrome Resistance Wire


The ni90 round wire, with a dimension of 0.37mm (27 AWG), is a premium nichrome resistance wire composed of 90% nickel and 10% chromium. Known for its exceptional heat resistance and electrical properties, it’s ideal for high-temperature applications, intricate electronic designs, and efficient power consumption. Its durability and adaptability make it a preferred choice for both industrial and home-based projects, ensuring consistent performance across uses.

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✔ Huge Range Available

✔ Produced In Warrington, UK

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Ni90 Round Wire

The Crazy Wire Company is best know as suppliers of top-quality Ni90 round wire. We have enormous stock levels at all times, as we use this wire to weave our specialist-grade woven mesh products. Our brilliant staff are experts in producing our spools of round wire on our 6 rapid action winding machines. All spools are produced to carry a little extra length to make up for any waste when handling the product.

The round wire, 0.37mm thick (27 AWG), is a high-quality nichrome resistance wire made primarily of nickel (90%) and chromium (10%). Compared to many other metals, this alloy combination offers superior electrical resistance, making it a popular choice for electrical applications. Ni90 round wire is characterised by its outstanding heat resistance, which permits it to remain stable even at elevated temperatures. Various types of home appliances and industrial heating elements benefit from this property. Ni90 round wire also has excellent mechanical properties and is very durable. Electronics and other specialised equipment can be wound into tight coils without breaking it. Furthermore, it consumes less power due to a lower resistance per length than many other resistance wires. You can use ni90 round wire for everything from high-temperature operations to creating custom coils for electronic devices. This wire delivers consistent performance while combining durability, efficiency, and adaptability.

Key product details:

  • Diameter – 0.37mm (370 Micron – 27 AWG) 
  • Ohms/m – 9.582
  • Technical Specification:
  • Ni – Rest
  • Cr – 10.0 
  • Fe – <1.0
  • Magnetic Properties – Nonmagnetic
  • Electrical resistance is high
  • Corrosion resistance is high

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 Ni90 round wire. We also have a huge range of KA1 and stainless steel round wire in immediate stock too.

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


FAQs About This Wire

Are There Any Limitations To Using Ni90 Round Wire?

  1. Temperature Limitations: While Ni90 round wire is known for its impressive heat resistance, it does have an upper temperature limit beyond which its properties can degrade or it can even melt.
  2. Chemical Reactivity: Ni90, made up of 90% nickel and 10% chromium, can show reactivity to certain chemicals. While it’s corrosion-resistant to many environments, prolonged exposure to certain harsh chemicals might affect its longevity and performance.
  3. Mechanical Stress: While Ni90 is durable, subjecting it to continuous mechanical stress or bending it sharply can lead to structural weaknesses or breakage.
  4. Electrical Properties: Ni90 has a specific resistance value. For applications requiring a different resistance profile, other materials or alloys might be more appropriate.
  5. Cost: Nichrome wires, including Ni90, tend to be more expensive than some other resistance wires. This can be a limitation for projects with tight budgets.
  6. Oxidation: Over prolonged periods at high temperatures, the wire can develop a thin layer of chromium oxide. This can act as an insulator, impacting the wire’s resistance properties.

Is Ni90 Round Wire Suitable For High-Temperature Applications?

Yes, Ni90 round wire is indeed suitable for high-temperature applications.

  1. Heat Resistance: Ni90, comprised of 90% nickel and 10% chromium, exhibits a high melting point and excellent thermal stability. This makes it a preferred choice for applications where the wire will be subjected to elevated temperatures.
  2. Consistent Performance: Due to its alloy composition, Ni90 maintains its properties over a wide temperature range. This ensures consistent performance even under fluctuating thermal conditions.
  3. Oxidation Resistance: The presence of chromium in the Ni90 alloy provides an oxidation-resistant layer when the wire is heated, preventing rapid degradation and ensuring a longer lifespan in high-temperature environments.
  4. Minimal Resistance Drift: With temperature changes, the electrical resistance of many materials can vary. However, Ni90 round wire exhibits minimal resistance drift, making it reliable for applications where consistent resistance at high temperatures is critical.
  5. Durable Structure: Ni90 wire retains its structural integrity at elevated temperatures, reducing the risk of the wire becoming brittle or breaking.

What Does The “90” In Ni90 Round Wire Represent?

Ni90 round wire has a nickel content of 90 percent. In particular, Ni90 round wire contains 90% nickel and 10% chromium. Wires have unique properties due to their composition, including thermal resistance, electrical resistance, and overall durability. The combination of nickel and chromium in these proportions results in a wire that performs consistently, especially at high temperatures. When heated, chromium also enhances the wire’s oxidation resistance.

What Is The Tensile Strength Of Ni90 Round Wire?

The tensile strength of Ni90 round wire, or any other wire for that matter, can vary based on factors like manufacturing processes, purity of the alloy components, and specific treatment methods applied. Typically, nichrome alloys like Ni90 have a tensile strength in the range of 600 to 800 megapascals (MPa) or 87,000 to 116,000 psi. However, it’s crucial to refer to the manufacturer’s data sheet or specifications for the exact tensile strength of a particular batch or brand of Ni90 round wire. This will provide the most accurate and relevant information for specific applications and usage considerations.


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.

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), 150 Metres (495 Feet), 200 Metres (660 Feet)


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