Electrical steel (CRGO and CRNGO)

Description

It is also known as silicon steel or transformer steel.

CRGO (Cold Rolled Grain Oriented) and CRNGO (Cold Rolled Non Grain Oriented)..

Supply

Silicon steel is produced in strips or rolls, cut into the needed shapes and then heat-treated to control the size of the grain of the steel. Through control of the grain size, the hysteresis loss of the steel can be accurately controlled. The direction of the grain in silicon steel can also affect its efficiency. The grain can be oriented in one direction through rolling to improve its density or the grain can be non-oriented and run in all directions, making the silicon steel less expensive.

Once the heat-treating process is completed, silicon steel is often coated or varnished, to further retard corrosion, then stacked to the needed thicknesses. These thicknesses are called laminations, and they may, or may not, be physically attached or bonded to one another. These stacked laminations serve as the cores of almost all electromagnetic devices in modern use, from power adapters for home electronics to substation transformers supplying electrical power to homes and businesses.

We also supply stock sheets and coils for markets that demand very low price and accept lower choices. As for example sheets coming from dismantled transformers.

In all our products, besides offering standard choices, we could offer other choices of available stocks –“non-prime”, “over-rolling” or “secondaries”– at even more competitive prices and/or with shorter lead times.

Use

CRGO has optimal magnetic properties in the rolling direction (grain direction) that makes it very appropriate for producing big size transformers..

CRNGO has similar magnetic properties in grain orientation as well as in the other directions. It is used for producing generators and small electrical motors.

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Documentation

• Quality equivalencies table for main producers
• Lamination Coating

PDF Catalogue [download]

Goldium Steel SLU.

C/ María Teresa León, parcela 1, nave 4, Polígono Industrial Puente Madre
26142 • Villamediana de Iregua • La Rioja • Spain
Teléfono: +34 941 048 023
Cell: +34 609 786 598
info@goldium.es