Nichrome can be called a specific material, it is not so common as copper and iron, but is no less important. This type of alloy was received in 1905 by the works of American scientist Marshal.
Features and properties
The main components of the nichrome wire are Chrome and Nickel. Also there are such additives as silicon, iron, aluminum, manganese.
Different industries enjoy nichrome wire in their work. It has the form of a silver thread, the diameter of which can be from 0.1 to 7 millimeters.
Usually this type of product is implemented in Motics, coils, If necessary, it is measured and cut off.
The main properties of nichrome can be found from the following table.
Heating temperature, melting
850- 110 degrees Celsius
650 – 700 MPa
1 meter resistivity coefficient
Less than 8500 kg / m3
Nichrome has a small weight, due to this material is often used to produce all sorts of electrical appliances. For wire is not characterized by loss of performance in liquid and aggressive media. Due to the chrome on the material there is a film that keeps it in isolation from the negative impact of external factors. The properties of this alloy are described in detail in GOST 10994-74, GOST 8803-89, GOST 12766.1-90.
We mention the features, at the expense of which the nichrome is considered valuable metal.
- Does not rust that distinguishes it from other similar materials.
- Has significant resistance relative to the specific current. Thanks to this nichrome wire, it is necessary much less than steel, for the manufacture of any adaptation. To all other, this feature contributes to the fact that the objects of nichrome have small dimensions and weigh little.
- Not deformed, not lit under the influence of high temperature.
- Characterized by elasticity, which makes it possible to easily change the shape of the wire.
Flaw The nichrome alloy one is a high price, but it does not reduce the demand for this refractory material.
It is not capable of creating connections during the use of flux. To carry out this procedure, you will need to comply with some sequence of the use of soldering tools. Speech in this case can serve a tin-lead alloy.
It is also worth separately prepare a flux, the component composition of which should be in rigor dispensing. The main components of the substance are Vaseline of technical origin, glycerin and zinc chloride. To make a mixture of perfect consistency, you will need to thoroughly mix all the above components. Emery paper will need to eliminate the remnants of pollution and oxidized formations. After that, the site should be wired by cotton, impose a flux and perform a soldering.
The use of nichrome thread is observed in many areas of life and production. For example, many are known that the electric stove helix is made from it, the heaters in the boiler. Also without nichrome it is difficult to imagine burning, cutting tree and the tool itself – dear.
In industrial sphere
Metal industry assigned one of the leading places in the life of humanity. Its products are widely applicable in the direction that uses electrical heating furnaces, firing stoves, drying, as well as aggregates, which are heated to a high temperature mode, heat exposure tools.
The wire of nichrome is an integral part of the apparatus for welding works, a household heater, a glass heating system, as well as a resistor, resistance assembly, a row.
Due to the high alloy resistance, it is used in the following areas:
- thermocouple heating tile in metallurgy;
- industrial ventilation drying;
- parts of the boiler, heat exchanger;
- electrodes for welding;
In the household sphere
Under household conditions, nichrome is used for foam and polystyrene foam cutting. As you know, at home cutting these materials is pretty difficult, since the use of a conventional knife foam can crumble. Wires are used for the manufacture of a special machine, which works on the basis of a preheated string. Using this device, you can independently do various billets made of polystyrene foam and foam. Nichrom is a structural element in most home units:
- Ten teapot, boilers, boiling cards;
- elements of hairdryers, bad, irons;
- car candles, as well as their heating system;
- electronic cigars.
Nichrome threads are needed in the medical sphere, because they are not able to cause an allergic reaction of the body. According to research, cuts that were sewn nichrome threads, heal much faster than the rest.
To all of the time, such elements found their use in the plastic direction of surgery during the intra-freed operation.
In the institutions of pharmacology, the alloy is part of the heating device for the column heater.
Nichrome wire has one brand, so each type of product has certain quality characteristics. The main groups of nichrome such.
- Material occurs in the structure of the heating elements of household and industrial type. The group has high heat-resistant opportunities.
- Nichrome group designed to work with an overpriced temperature up to 9 hundred degrees.
Wire of the resistor group is characterized by a diameter of 0.009-0.4 millimeters.
This indicator for the second metal group can be from 0.2 to 7.5 millimeters. To “Sorodih” wire alloy include candles and fechrals, which have a kind of chrome alloy with iron and aluminum.
These materials are characterized by high electrical resistance, resistance to temperature modes up to 1400 degrees Celsius. Despite all the above advantages, Cantals and fechras are not so reliable as nichrome, but it is much cheaper.
Nichrome products have a different percentage of component parts. The most common can be attributed to such.
- X20n73y Melts the vacuum induction method and as composite elements contains such shares of substances: 20% chromium, 73% nickel, 3% aluminum, 1, 5% molybdenum.
- XN70U-N Consists of 20% chromium, 70% nickel, 3% aluminum, less than 0, 3% manganese, less than 1, 5% iron. This alloy is often used to produce elements that are an integral part of heating devices.
- HN20YU Apply in industrial furnaces with heating function. As part of a alloy of 20% chromium and nickel, 1% aluminum, as well as 50% iron.
Buying none, it is worth considering the labeling:
- N is the category of heating elements;
- C – used in resistance elements;
- TEN – for boilers with tubular type design.
How to determine?
Externally nichrome wire looks like many other products, so every consumer is important to learn how to distinguish it from another. The main distinguishing features of the corrosion of nichrome:
- The new metal has a white color, and the already used dark;
- Magnical wire is minimal or completely absent;
- nichrome – pretty hard material;
- This metal can destroy acids;
- Products are not oxidized if there is an influence on them.
To choose a wire from the nichrome alloy, it will be necessary to correctly analyze its nominal performance.
For this calculate Specific resistivity of the working element according to the formula R = ρ · L / S, Where the length is taken into account, the cross section area.
Where to get?
Many are interested in how and where to get nichrome at home. There are methods that allow you to find metal.
- Make an order for nichrome products in a company that is engaged in its production.
- Buy in a specialized or shopping store. It may be a point for the implementation of radio components, various materials and designers.
- Buy in people who are engaged in the implementation of radio components and small ground.
- In my house. Nichrome is in some devices, for example, in the spirals of electric stoves.
With a major order, it is better to use the first option, everyone else will fit if the consumer needs a little nichrome alloy.
What can be replaced?
The failure of the heating element of various household appliances is currently not uncommon. Often the technique needs to change the working spiral, which is considered an integral part of the electric stilt, iron, kettle. In this case, a worthy alternative to nichrome wire is a stainless steel.
These materials practically coincides resistance. However, it is worth remembering that the stainless steel has low levels of resistance to the oxidation process. To replace nichrome alloy, you can use the braid from the old hose, where there are reinforced stainless fibers. Nichrome is a unique metal with high performance characteristics, so it is quite in demand now.
Where you can take a nichrome wire look next.