Various categories of heating wires for Furnaces - Heanjia Super-metals Co., Ltd.

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Various categories of heating wires for Furnaces

The nickel chrome alloy or nichrome is the traditional and oldest material used in the form of heating materials for various applications. In fact this alloy is also used in the present times in the form of Nichrome heating wire that obtains features of ductility, large temperature potency and stabilization. The popular compositions of nichrome wire used in the market are provided below:

ASTM "D" class that consists of 35% of nickel and 20% chromium and remaining is balance iron

Apart of these compositions of nichrome wires othese alloys have come into existence with composition of 70% of nickel and 30% of chromium. Among the above mentioned compositions, an alloy with the composition of 70 to 30 of nickel and chromium offers the largest temperature stabilization of about 1250°C in vacuum and the largest furnace temperature competency of about 1150°C. The basic cause of introduction of this alloy is its ability to oppose the green rot that is actually an oxidation state of chromium in the interganular form that occurs in the other alloys when they are used in the heat absorption or heat emitting process in the temperature levels of about 1500 to 1800°F.

Fe – Cr - Al Alloys

The FeCrAl alloy heating wire is a combination of iron, chromium and aluminum metals with the concentration of 72.5% of ferrous, 22% of chrome and 5.5% of aluminum. The large level of alloy is achieved from the traditional melting techniques with temperature limits of 1300ºC in the chamber and 1400°C for elements in the air. Different other levels are also introduced in which the concentration of aluminum has been decreased and balanced by the increased concentration of ferrous.

The performance temperature and resistance is quite higher and the density is kept lowered as compare to Nichrome heating wires. It offers an affordable, extended life heating materials. Though there are a few nuisances such as reduced hot potency, reduced ductility and embrittlement while this alloy is implanted for certain application.

Fe – Cr - Al PM Grade alloys

In the latest times, iron, chromium and aluminum alloys are introduced to use with the grinded metal technique in the production process of heating wires. Initially the large concentrated FeCrAl alloy is obtained from the traditional melting technique that is then grinded into powder and sent to compression for making a billet that is formed by warm isostatic compression or cold isostatic compression process. This billet process provide end product of uniform strip, wire or tube. However following this technique can lead to more expenditures and it is a complex process but it results in the extremely enhanced hot potential and temperature strength wire to use.

Overall the wide varieties of heating wires can be used for electrical resistance furnaces. The products include the metallic alloys and others.

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