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Anonymous
Asked: November 16, 20192019-11-16T11:19:16+00:00 2019-11-16T11:19:16+00:00In: Consumer Products & Retail, Materials

What is electrical steel?

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There are various types of steel used to make electrical products. But what is electrical steel? Is it the steel which is used to make wire and cables or is it something else. It becomes more confusing when I come across that it is used in making transformers.

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    1. Flavell Level 1
      2019-11-16T11:23:46+00:00Added an answer on November 16, 2019 at

      Electrical steel is different than cable and wires.

      Electrical steel is speciality steel tailored to produce certain magnetic properties, such as small hysteresis area (which is a small energy dissipation per cycle, or low core loss) and high permeability. It is basically an iron-silicon alloy specially designed to produce positive magnetic properties like small hysteresis cycle, low core losses and high magnetic permeability. The silicon content ranges between 0.5% and 5%.

       

      • There are two main kinds of electrical steel. The grain-oriented electrical steel (GOES) and non-grain oriented steel (NGOES).
      • The grain-oriented electrical steel (GOES) contains around 3% silicon. While the non-grain oriented steel (NGOES) could have a wider range of silicon content and can be divided into three categories on the basis of composition and application which are as follows.
      • Low silicon steel containing around 0.5% to 1.5% silicon. These type of steel are used in rotating machines, while steel containing around 1% silicon is also used in reactors and small transformers.
      • Intermediate-silicon steel contains between 2.5% to 3.5% silicon and used in motors and generators of average to high efficiency. They can be used in small to medium size intermittent-duty transformers.
      • High-silicon steel containing around 3.75% to 5% silicon. This type of steel is used in power transformers and the highest efficiency motors, generators etc.
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