Fecral wire Cr23Al5
A fecral wire is an alloy that consists of iron, chrome, aluminium with masteralloys of manganese and silicon. It became an indispensable material in a manufacturing of electric appliance heating elements and industrial electrical furnaces. It is utilized also in convection heaters, blow heaters, hair driers, rheostats, and resistors while producing the nests of resistance. A huge application is conditioned upon a high temperature of melting and excessive specific real resistance.
Main properties of Cr23Al5
Fecral is an ideal alloy with an excessive specific real resistance (1,20−1,30 Ohm-mm2/m) which possesses heat resistance up to 1450 °C. It is claimed to be indispensable at temperature extremes. These properties allow using this alloy extensively while manufacturing the heating units. Such wire possesses a variety of further advantages: it has a perfect corrosive resistance on air, in argon, in a vacuum, oxidizing, sulfur-containing and carboniferous environments. It shows not very high relative density (7,2 g/cm3), but it has a great yield limit, which allows using this with a minimum diameter wire. It also has an excellent firmness against mechanical loads. The main advantage is its cost: it costs just 20% of a similar materials price. Among the demerits of alloy, there is only its frailty, which essentially complicates a process of a manufacture strips and thin wires. It can be eradicated with a help of nickel miscellaneous or analogues elements, but hereby final cost of a material will be increased.
Because of alloy frailty, a method of a cold work can not be applicable. Consequently, for drawing a filament are used special energy-intensive methods, which reflect on a pricing of alloy. At a manufacture, usually, are used methods of drawing and pressing. At a later stage, a finished product is going to be coiled or spooled for further use.
Percentage composition GOST (all-Union State Standards)
|Cr15Al5||≤0.015||≤0.03||≤0.08||≤0.1||≤0.1||≤0.6||0.2 — 0.6||≤0.7||≤0.7||4.5 — 5.5||13.5 — 15.5|
|Cr23Al5||≤0.015||≤0.03||≤0.05||≤0.1||≤0.1||≤0.6||0.15 — 0.6||≤0.6||≤0.3||4.6 — 5.5||21.5 — 23.5|
Fecral filament is one of the most popular and preferable material among the industrialists. Winning consumer properties, excellent technical properties and low price gain a contemporary market. Nowadays, fecral has almost displaced nickel from this section. In comparison with nichrome, a low fecral wire Cr23Al5 price is caused by using cheap aluminium instead of expensive nickel. A cost depends on a diameter.
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