Arnon Electrical Steel | NGOES
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Arnon® Electrical Steel

Arnold Magnetic Technologies produces both Grain Oriented (GOES) and Non Grain Oriented (NGOES) Electrical Steels, which are optimized by thickness and finish to meet your most demanding needs for high speed, high efficiency motors and high efficiency transformer applications. When optimally applied, each type offers reduced eddy currents which translate into energy savings.

Advance your motor and generator design

Arnold's NGOES is manufactured under the trade name Arnon® and is produced in thicknesses of 0.005" (0.127 mm), Arnon 5 and 0.007" (0.178 mm), Arnon 7. Typical NGOES laminations use 0.0118" to 0.0185" (0.30 mm to 0.47 mm) thicknesses.

By using thinner laminations, your high speed motor and/or generators can achieve a higher level of performance, through improved efficiency, all in a smaller package.

Arnon has shown to be particularly advantageous for higher frequency motors and generators above 400 Hz. In these designs, the thinner material offsets the less efficient effects of increased eddy currents and subsequent heat buildup. Arnon laminations have proven to be the industry leader at switching frequencies above 1K Hz.

Arnon has the ability to lower core loss by as much as 50% compared to other NGOES materials. Some motors using Arnon have been tested to exceed 98% efficiency.

Why Arnon?

Thin gauge Arnon provides efficiency improvements at higher frequencies above 400 Hz with exponential efficiency gains as the frequency increases.

  • Arnon is usable at higher frequencies than cobalt-iron (Hiperco 50) materials. Co-Fe materials are not recommended for applications over 1200 Hz whereas Arnon Si-Fe is the preferred material to at least 10 KHz.
  • Low coercivity coupled with the hysteresis curve shape of Arnon provides reduced hysteresis loss in rotating machinery, yielding a more efficient motor or generator with less heat buildup and better performance (e.g. improved torque density) and/or the ability to maintain constant RPM’S under load.
  • Arnon exhibits up to 50% lower core loss than competitive non-oriented silicon steel when driven by the same field, confirming Arnon’s lower coercivity and improved hysteresis curve shape.
  • Low loss Arnon is especially useful in totally enclosed motor designs where heat cannot be easily removed.
  • Arnon is significantly less expensive than Co-Fe (Hiperco 50) – about 1/3 its cost.

Learn more about Arnon Electrical Steel.


Arnon® Gauges

  • Arnon 5  0.005" (0.127mm)
  • Arnon 7  0.007" (0.178mm)

More information can be found on the advantages of using Arnon in the following resources: