Kanthal® alloys vs. Nikrothal® alloys
For the furnace user, using Kanthal® iron-chromium-aluminium (FeCrAl) alloys instead of nickel-chromium (NiCr) alloys results in less amount of material and also a longer element life, which mean considerable cost savings.
The table below shows an example of a 33% weight saving obtained by using a Kanthal® alloy instead of a Nikrothal® alloy. This lower element weight results in considerable cost savings, not only regarding element material but also support systems, because fewer suspension hooks are necessary.
|Nikrothal alloy||Kanthal alloy|
|Furnace temperature °C (°F)||1000 (1832)||1000 (1832)|
|Element temperature °C (°F)||1068 (1954)||1106 (2022)|
|Hot resistance (Rw)||3.61||3.61|
|Temperature factor (Ct)||1.05||1.06|
|Cold resistance (R20)||3.44||3.41|
|Wire diameter mm (inch)||5.5 (0.216)||5.5 (0.216)|
|Surface load (W/cm2)||3.09||3.98|
|Wire length m (inch) 3 elements||224.9 (8.82)||174.6 (6.85)|
|Wire weight kg elements||44.4||29.6|
44.4-29.6/44.4 = 33% weight saving (based on the same wire diameter).