0.81mm (20 AWG) Nicr90 Nichrome Resistance Wire


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Nicr90 Heat Treatment Wire

The Crazy Wire Company are well known as suppliers of top quality Nicr90 heat treatment wire. We have enormous stock levels at all times, as we use this wire to weave our high specification 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 0.81mm (20 AWG) Nicr90 nichrome resistance wire is a premium alloy of nickel and chromium, known for its superior conductivity and resistance attributes. As a result of its heightened nickel content, this Nicr90 variant boasts enhanced electrical conductivity and temperature resistance. Because it has the ability to consistently perform at high temperatures, it is commonly used as a heating element in household appliances such as toasters and ovens. Lastly, due to its oxidation resistance, it is ideal for electronic components such as resistors due to its high durability. There are a number of applications for Nicr90 nichrome wire, which is a reliable, versatile, and durable choice.

Key product details:

  • Diameter – 0.81mm (810 Micron – 20 AWG) 
  • Ohms/m – 1.35
  • 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

How Does Nicr90 React to Chemical Exposures?

Nicr90, an alloy predominantly made up of nickel and chromium, has good resistance to many chemicals due to its stable oxide layer. However, its reactivity can vary depending on the specific chemical in question.

  1. Oxidizing Agents: Nicr90 is typically resistant to oxidation, especially at high temperatures. This resistance is due to the formation of a protective oxide layer on the wire’s surface.
  2. Reducing Acids: The presence of chromium in the Nicr90 alloy imparts resistance against reducing acids, but it’s worth noting that the high nickel content can make it susceptible to attack from certain acids like hydrochloric acid.
  3. Sulfur Compounds: At high temperatures, sulfur compounds can react with the nichrome, leading to reduced life and possible premature failure.
  4. Alkalis: Nicr90 generally shows good resistance to alkalis.
  5. Salts: Nichrome has decent resistance to many salts. However, specific salt solutions and conditions can be more aggressive and affect the longevity and performance of the wire.

It’s essential to consider the specific chemical environment, temperature, and concentration when determining the suitability of Nicr90 for a particular application. If unsure, it’s always recommended to consult with a materials scientist or a similar expert to understand the compatibility and possible reactions.

Is Nicr90 Wire Eco-Friendly or Recyclable?

Nickel-chromium wire, made mostly from nickel and chromium, is not inherently biodegradable. It is, however, recyclable. Nickel and chromium are valuable metals that can be reclaimed and repurposed in a variety of industrial applications. Metal recovery facilities can process used or leftover Nicr90 wire. This allows the metal to be reintroduced into the production cycle and reducing the need for virgin material extraction. The recyclability of metals reduces the environmental impact of mining and processing new metals, as well as preserving resources. As a result, even though the term “eco-friendly” may not be the first word that comes to mind when thinking of metals, Nicr90 wire can be recycled and reused efficiently, making it a more sustainable option in the long run.

What Is the Maximum Temperature Nicr90 Can Withstand?

Nicr90, a specific variant of nichrome alloy, is primarily designed to perform under high temperatures due to its notable heat resistance properties. Generally, nichrome alloys can operate continuously at temperatures up to 1,100°C to 1,250°C (2,012°F to 2,282°F). However, the specific maximum temperature Nicr90 can withstand continuously will depend on factors like the specific application, environment, and duration of exposure. For intermittent use or short durations, it might tolerate slightly higher temperatures. Always consult the manufacturer’s specifications or data sheets to get precise maximum temperature ratings and ensure safe and efficient performance for your intended application.

What Are Common Mistakes to Avoid When Using Nicr90?

  1. Overheating: While Nicr90 is designed for high temperatures, continuously operating it beyond its rated temperature can reduce its lifespan and might lead to premature failure.
  2. Improper Storage: Storing the wire in humid or corrosive environments can impact its properties. It’s essential to keep it in a dry and clean place to prevent unwanted oxidation or corrosion.
  3. Incorrect Soldering: Due to its specific composition, soldering Nicr90 requires specific fluxes and techniques. Using standard soldering processes might not provide a reliable connection.
  4. Mechanical Stress: Continually bending, twisting, or placing the wire under excessive tension can lead to structural weaknesses. This affects its performance and increasing the risk of breakage.
  5. Ignoring Oxidation: Over time, even though Nicr90 is resistant to oxidation, a thin oxide layer might form, especially when exposed to high temperatures. It’s essential to be aware of this, as an excessively thick oxide layer can impact the wire’s performance.
  6. Incompatible Chemical Exposure: While Nicr90 has good chemical resistance, exposing it to certain chemicals, especially strong reducing acids, can degrade the wire.
  7. Using Incorrect Gauge: Not choosing the appropriate wire gauge for a specific application can lead to issues like overheating or insufficient performance.
  8. Inadequate Insulation: If Nicr90 wire is used in an environment where it might come into contact with other conductive materials, it’s crucial to ensure it’s adequately insulated to prevent short circuits or unintentional grounding.
  9. Overlooking Regular Maintenance: For applications where the wire is continuously in use, regular checks for any signs of wear, oxidation, or mechanical damage are essential.
  10. Lack of Ventilation: When used in confined spaces, it’s essential to ensure adequate ventilation, especially if the wire is being used as a heating element, to prevent overheating and ensure efficient heat dissipation.


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)


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