Nichrome.

Nichrome is the general name for a class of nickel-based alloys intended for resistors and heating elements. The most common brand - X20N80Nichrome - an alloy of nickel and chromium, which, depending on the brand of the alloy, contains 55-78% nickel (Ni); 15-23% chromium (Cr); 1.5% manganese (Mn); iron, aluminum, etc. make up the remainder. To be more precise, nichrome X20H80 contains 72.65-79.1% nickel (Ni) and 20-23% chromium (Cr), and nichrome X15H60 - 55-61% and 15-18%, respectively. Due to the higher nickel content, X20H80 is more expensive.

The most valuable physical properties of nichromes X20N80 and X15N60 and fehral X23Y5T are high electrical resistance, low temperature coefficient of electrical resistance, high corrosion resistance in various media and high heat resistance.

Nichrome can work at temperatures of 1100-1300 ° C, fehral X23Y5T - up to 1400 ° C, depending on the diameter of the wire (according to GOST 12766.1-90).

The larger the diameter of the nichrome wire or fehral of the wire from which the heater is made, the higher its maximum operating temperature.

Subduction of fehral X23Y5T (fencer wire) is more heat resistant than products of nichrome X15N60 and X20N80 (nichrome wire, thread, tape, nichrome strip). The above properties of these precision alloys determine the areas of their application.

Maximum operating temperatures of alloys nichrome and fehral

• Nichrome X20N80 to 1200 degrees Celsius.
• Nichrome X15H60 to 1125 degrees Celsius.
• Nichrome XN20YUS to 1100 degrees Celsius.
• Nichrome XN70U to 1200 degrees Celsius.
• February X23YU5T to 1400 degrees Celsius

Specific resistance of nichrome and fehral

• Wire nichrome more than 3 mm brand X20N80 - 1.12 ohm * mm / m.
• Wire nichrome more than 3 mm brand X15N60 - 1.13 ohm * mm / m.
• Wire nichrome more than 3 mm brand XN20US - 1.02 ohm * mm / m.
• Wire nichrome more than 3 mm brand XN70Y - 1.30 ohm * mm / m.
• Fencer wire more than 3 mm brand X23Y5T - 1.39 ohm * mm / m.

Thus, most often nichrome and fehral are used for the manufacture of electric heating elements of furnaces for all industries, household appliances and heat devices.

Nichrome X20N80 (band, tape, thread, nichrome wire) is a material for heating elements of industrial electric furnaces and various electric heating devices. It is recommended to use it for heaters of electrothermal equipment of high reliability. Nichrome X15N60 (ribbon, thread, nichrome wire, strip) is used for the manufacture of the same products as X20N80, and is also used in electronic products and in the creation of non-precision resistors.

Since nichrome and fehral are mainly used for the manufacture of heating elements, the most common products are nichrome wire (thread), nichrome tape and nichrome band X20N80 and X15N60, ferry wire X23Y5T.