In the section on the question of how to recognize that the wire is made of nichrome? given by the author *VLAD* the best answer is New nichrome spirals (for soldering irons or tiles) - white, shiny. Worked with nichrome - covered with oxide of dark gray, almost black. If the oxide is cleaned - inside the wire is white. Not magnetic or almost non-magnetic. Differs in the increased resistivity.
The wire is quite rigid, noticeably stiffer than soft iron (not steel), and even more so copper and aluminum. You most likely won’t have a tester with you, so you can’t measure the resistance (it won’t work by eye)
...
p1. bend-unbend it in one place several times. time, she's not very flexible
and a kind of loop is formed;
p2. with a lighter, heat a section of 1 ... 2 cm for some time and cool (preferably longer),
we repeat p1 in this section - there should not be a tangible difference.
The recipe is not 100%, there is a wire made of manganin and constantan,
but it usually has a dark surface color.
I wish everyone happiness!
(13286)
Yes

Answer from chevron[guru]
she is very flexible

Answer from to dry[guru]
put an ohmometer and check Nichrome has a huge resistance,

Answer from Request[newbie]
Calculation of the electrical resistance of nichrome wire, X20H80 tape.
link

Nichrome wire is a sought-after material that has already taken the place of "traditional" among many similar products. Get it thanks to an alloy of nickel and chromium.

If you are also looking for such an option, then simply enter nichrome wire to buy in the search query and then view all the proposed products.

What is nichrome

It should be noted that such an alloy contains a high concentration of elements of a chemical nature, which provides strength and resistance to electrical influences.

Why is nichrome in demand in various fields? Here are a few features of this material:

• sustainability. The product does not rust, it perfectly resists corrosion, which cannot be said about other types of metals;
• not deformable. Nichrome wires retain their properties under any impact;
• elasticity. The material can be given a variety of shapes.

Nichrome wires are used in various fields. The product is used for the manufacture of machine tools, devices for wood processing.

The wire has found wide application in the creation of ordinary household heaters.

There is a certain classification of nichrome products, which is necessary if they are used in various systems. For example, the C marking indicates that the product is used for the manufacture of various elements characterized by resistance.

The letter H on the wire indicates that the material is used to create heating systems.

Nichrome from used products or purchased, but not in demand, gets through non-ferrous metal collection points to recycling.

The purchase of nichrome in any form is carried out by both small points and reputable companies, the price also varies.

Where to apply - the deliverer decides after studying the conditions.

Consider what nichrome and its scrap are, how much they pay for 1 kg of this alloy and why.

Received in 1905 an alloy of nickel and chromium in a ratio of 80 to 20, due to its technical properties, has found application in many devices and products. Despite the high cost of the material obtained, the obvious benefit was observed due to the durability and trouble-free operation of the devices.

The percentage of nickel-chromium was selected experimentally and solved the goal: to achieve such metal properties that were not provided by any of those used in technology at that time.

Advantage Features nichrome:

• plasticity (an important property in the production of products from nichrome);
• heat resistance;
• insignificant coefficient of expansion when exposed to high temperatures;
• does not create a significant electromagnetic field during the operation of products in electrical appliances:
• high resistance to current (the main parameter for use in electrical heating devices);
• small specific gravity.

At present, the composition of the alloy may vary. May be administered additives from:

• manganese;
• gland;
• silicon;

The main brands of nichrome - Х20Н80 And Х15Н60.

Products obtained from a nickel-containing alloy:

• ribbon;
• rod;
• wire;
• certain types of fasteners;
• parts for the operation of devices in conditions of sharp and repeated temperature changes and (or) in an aggressive environment.

They are used V:

• electrical engineering;
• instrument-making;
• metallurgical;
• machine tool building and some other industries.

Sources of nichrome scrap

In modern heating technology (household and industrial) there are products made of nichrome. High resistance resistors, including ballast are often made from this alloy.

A zealous owner, before throwing away a device that cannot be repaired, will disassemble it, sort it by type of recyclable materials. Then he will receive monetary compensation for his labors.

A burnt radiator can be handed over without disassembling it. In this case, it will be accepted at the price of ordinary scrap metal. But after all, it also contains non-ferrous metals, albeit in small quantities.

At separate delivery constituents due sum will look much nicer.

In addition to privately owned equipment that allows you to extract nichrome parts and wire from yourself, there are other sources.

The most attractive warehouses with illiquid. It is not always possible to sell unclaimed products as products. The way out is to pass it as a non-ferrous metal.

When certificates for products have been preserved and the batch is large (in terms of weight), nichrome will be accepted on the most favorable terms.

Money from the delivery of the extracted nichrome products will not be superfluous.

At reconstruction or reprofiling production can be handed over :

• furnaces;
• CNC machines (plastic casting);
• other electrical devices.

If you are engaged in the collection and delivery of ferrous metal, then it will be useful for you to know. Don't know where to find non-ferrous metals? Read this one. Doubting which model of metal detector to choose? Check out an overview of popular models

Wire receiving features

metals, taking wire, usually pay for it at a reduced rate. With nichrome wire, the situation is reversed.

Often this type of waste is evaluated expensive, how:

• tape trims;
• canvases;
• monolithic parts.

Maximum estimated wire in bays. Even scraps of burned-out coils can be handed over at a very reasonable cost.

Selling scrap as an additional source of income

In the house and garage, you can’t earn much on your own stocks of nichrome. But everyone has neighbors who are ready to give away damaged household appliances for a modest reward or even for nothing, subject to self-pickup or self-pickup.

You are left with:

1. Equip dismantling site.
2. Acquire necessary tools.

A few extra thousand rubles a month will not be superfluous.

Admission conditions and restrictions

When choosing a point for the delivery of nichrome raw materials, you should pay attention to some information about the conditions for receiving a particular point.
The deliverer must note for the following points:

1. The maximum declared value refers to an alloy in which the nickel content approaches 80% , and scrap in its pure form (without dirt, chemical residues).
2. Is there a limit on batch weight(some have a minimum weight, eg 500 kg). They will accept, of course, less, but the price will be reduced.
3. What method is used to check the nickel content in raw materials ().

Factors affecting the cost of scrap

Why is the price of nichrome significantly different for different receivers? What does it depend on? Is it possible to get the maximum benefit by studying the market and preparing the waste nichrome you have in an appropriate way?

Included in the alloy is an expensive raw material. In its pure form, it is present only in the composition meteorites.

The secondary use of nichrome is economically beneficial. The higher the nickel content in the sample, the higher the acceptance value. For each percentage, on average, from 3 to 5 rubles.

An increase or decrease in the price of nickel on the stock exchange responds, albeit not immediately, to the assessment of secondary nichrome.

The demand for raw materials in a particular region. The more enterprises-consumers of nichrome scrap, the higher the purchase price. In large industrial cities, the price per kilogram of alloy is higher (up to three times) than in the outback.

The type of nichrome sold also affects the cost.

We single out the following kinds nichrome scrap:

• wire;
• ribbon;
• bar;
• scrap of incomprehensible at first glance origin.

In the points where the assessment is carried out for each of the species separately, the new one is evaluated as much as possible. wire thickness from 3 mm.

Let's move on to numbers:

The table shows the estimated scrap per 1 kilogram for the most expensive brand of nichrome. For brand Х15Н60 prices are 20% lower.

The price of nichrome scrap per 1 kg in small points is lower than the cost indicated in the table by about 20-25% .

How to get the maximum benefit

When planning to hand over the nichrome that you have collected, it will be useful to conduct reconnaissance in order to find out the conditions for receiving non-ferrous metals at the nearest point. If the price list contains nichrome in one line, without division by types and brands, you can lose up to 30% of the amount that can be earned for sorted metal.

It is impossible to determine the percentage of nickel in a metal or alloy at home, but the fact of its presence is quite real.

Such an alloy is not magnetized or magnetizes slightly, and when exposed to a grinder, it gives small reddish sparks.

The cost of the sold alloy directly depends on the amount of nickel in it and the price of the nickel itself.

Where to get nichrome, you can learn from this video:

In contact with

Nichrome is the general name for alloys whose two main components are chromium and nickel. The original version of the alloy contained 20% chromium and 80% nickel. Currently, there are 10 variants of this alloy, each of which has a different ratio of additional impurities - aluminum, titanium, silicon, molybdenum, iron or manganese.

The properties of nichrome directly depend on the proportions of the main and additional metals in the alloy. The most common nichrome product is wire, which is widely used in modern industry.

Nichrome wire: description and main characteristics

Nichrome wire is a metal cord that is produced in different lengths, thicknesses (from a fraction of a millimeter to several centimeters) and sections: round, oval, square or trapezoidal.

The most common type of section is round, since such a wire has the maximum ratio of the cross-sectional area to its perimeter. The weight of the product directly depends on the composition of its alloy and the diameter of the wire itself.

Nichrome has a rare combination of properties that make it simply an exceptional alloy, the only analogue of which, fechral, ​​is much inferior to it in all respects.

The heat resistance of this material can reach up to 1400 degrees Celsius (two-component alloy). The maximum allowable exposure temperature depends on the composition of the alloy. Also, this wire does not change its shape under the influence of heat and does not sag.

Nichrome wire has a high resistance to electric current, which means that this metal will require much less than a similar one without loss in the amount of heat generated. Therefore, devices that use nichrome wire will have smaller dimensions and weight.

The two-component alloy has no magnetic properties. They occur only when iron is added, but have very weak performance.

Nichrome is not subject to corrosion, resistant to aggressive environments, due to which it has an almost unlimited service life. Nichrome wire has good ductility and excellent molding, while having high strength and hardness, is not afraid of mechanical stress.

The composition of the metal alloy varies the performance of these characteristics. The photo shows the main options for winding nichrome wire.

The use of nichrome wire

The use of nichrome wire is very extensive, due to its versatility. In industry, it is used to create laboratory equipment, resistance units, resistors, rheostats, various heating devices, electric furnaces and kilns for roasting and drying, in welding machines. Wire with a cross section of several centimeters can be used for the manufacture of automatic welding and even ropes.

There are elements of nichrome wire in many household items - toasters, hair dryers, heating systems for windows and rear-view mirrors in cars, household heaters, vapes and even shoe insoles.

Very often, this wire is also used for home-made equipment - cutters and electric jigsaws (for wood and foam), soldering irons and devices for burning wood, home forges.

The choice of nichrome wire

How to choose the wire you need specifically for your needs? For different purposes, items with different alloy compositions, diameters and cross sections are used, so here, first of all, it is necessary to focus on the marking of the wire.

Marking H indicates that this wire is used in the manufacture of heating elements not exceeding 0.2 mm in diameter.

Marking C indicates that this product is suitable for the production of resistance elements of various mechanisms.

TEN marking indicates the applicability of this product for the production of tubular electric heaters.

The marking also indicates the operating temperatures that are maximum for a particular alloy and its resistivity.

Operating Temperatures/Resistivity:

Х20Н80 up to 1200 degrees Celsius — Х20Н80 — 1.12 Ohm*mm/m
Х15Н60 up to 1125 degrees Celsius — Х15Н60 — 1.13 Ohm*mm/m
KhN20YUS up to 1100 degrees Celsius - KhN20YUS - 1.02 Ohm*mm/m
KhN70Yu up to 1200 degrees Celsius - KhN70Yu - 1.30 Ohm*mm/m

Above in the text are indicators for wire with a thickness of more than 3 mm. The larger the wire diameter, the greater the value of these indicators.

Be sure to pay attention to the availability of technical documents from the manufacturer, on the basis of which this wire was made - GOST or TU. Only these documents can guarantee that you are purchasing a quality product, the characteristics of which will not be lower than those declared by the manufacturer.

Photo of nichrome wire