Characteristics

Nichrome is used as the material for the production of heat-resistant, high-resistance filaments. We owe the discovery of this unique alloy to the American A. Marsh of the Driver-Harris Company. In 1905, he received a patent for his invention, combining nickel with chrome in the ratio of 4:1. Nichrome alloys are characterized by high electrical resistance, heat resistance, high resistance to corrosion even in aggressive environments. The service life of such products depends on the environment in which they operate, as well as on the composition of the components in the alloy.

- 55-79% Ni gives the material ductility, high electrical resistance, unchanged at high temperatures;

- 15-22% Cr gives hardness, increases corrosion resistance and wear resistance of the material.

The composition can be alloyed with the following elements:

- silicon (up to 1.5%)

- manganese

- iron

- aluminum

- titanium

- phosphorus

- sulfur

- carbon

Marking

- TEN - used for tubular electric heaters

- H - for heating devices

- C - for resistance elements

Range (in mm)

- 0,012

- 0,016

- 0,03

- 0,05

- 0,08

Advantages of

Nichrome has a successful combination of heat resistance and high electrical resistance. The minimum coefficient of thermal expansion prevents the wire from sagging at significant temperatures. The surface oxides of chromium and nickel give the alloy excellent corrosion resistance which makes it suitable for use in aggressive environments. Plasticity allows the finest wire and strip to be rolled in a cold condition. Heat resistance helps nichrome wire withstand mechanical stresses without deformation or fracture.

Disadvantages

Nickel is not one of the cheap elements, and therefore the high price of nichrome wire is justified. Keep in mind that a cheap analogue of this material has not yet been found. To date, the production of nichrome is steadily increasing. The prices depend on the fluctuations of the world prices for nickel and chrome.

Applications for

Excellent indicators of heat resistance and resistivity allow the use of nichrome filament for the excitation of thermal radiation. Such a filament found its application in pharmacology as a thermocouple of laboratory heaters. It is woven into the body of a bulb heater made of fiberglass. Homemade induction furnaces can even be assembled (for example, for melting aluminum). Calculation of nichrome thread for homemade furnaces was made back in the middle of the twentieth century by metallurgist Khomutov. On an ordinary refractory tube (30 cm long) the thread is wound. To ensure that the coils are not locked together, they are wound on the tube in a pair with a cord of two-millimeter diameter, then coated with silicate glue. Before it is completely dry, the cord is removed and a perfect nichrome spiral is left, the turns of which are not short-circuited. The finished pipe is wrapped with asbestos.

Nichrome cord in a rolls? This is no joke. Modern craftsmen make heated insoles for winter fishing. They are powered by batteries attached to the belt. Not entirely comfortable, but for the sake of dry and warm feet can be tolerated. By the way, the British have long been producing self-heating socks and insoles on a production scale.

Nichrome thread can cut foam, fluoroplastic or polyurethane, leaving an even, smooth cut, without burrs or cavities. The shape of the cut product can be highly complex. Nichrome thread is the main working component of machines that cut foam shapes. Jigsaws with a nichrome alloy thread are used to create decorative wood items, panels.

Delivery

All submitted products are certified. The technical documentation includes data on the chemical composition, the limiting percentage of impurities; mechanical properties of the products. With us you can buy in bulk a variety of semi-finished products for large-scale productions. We also offer good conditions for retail buyers. You will be satisfied with the level of service and responsiveness of service.

Buy at a competitive price

Evek GmbH sells rolled metal products at the best price. It is determined by the technological features of production without the inclusion of additional costs. With us it is easy to buy in bulk all the necessary products for large-scale productions. We also offer favorable conditions for retail buyers. You will be satisfied with the level of service and high quality products. On our site. you will find all the necessary information about the goods, be able to download the catalog of products, view the price list. We are waiting for your orders.