Silicon Steel Product Guide
Silicon steel is a kind of steel that consists of iron mixed with up to 3.2% silicon by weight. Silicon increases steel’s magnetic conductivity and electrical resistance (the opposite would be electrical conductivity). With this, the electrical resistance in irons may be increased by up to five times when silicon is added. This alteration reduces the eddy current losses of the alloy, which has an effect that is immediately felt in the magnetic core.
Cold-rolled-non-grain-oriented steel (CRNGO)
There is no particular pressing used to adjust the crystal orientation of this silicon steel product (this is the overall texture of the material). An isotropic material is produced from this jumble of unoriented grain (where magnetic properties are omnidirectional). This is the more cost-effective choice, and it is used in circumstances in which cost is prioritized above efficiency and in which the magnetic flux does not need to be kept constant. CRNGO is often found in electric motors and generators that have moving components.
Cold-rolled-grain-oriented steel (CRGO)
The magnetic flux in this silicon steel is steady and directed to the processing. The rolling procedure gave it a highly ordered crystal structure, which can be seen in its appearance. Cold-rolled strips with a thickness of less than 2mm are made from CRGO, which is provided in coil form. First, the coil is rolled out, and then it is cut into the desired shape. This process is repeated for both grain-oriented and non-grain-oriented laminated sheets. This is the motivation for the need of its workability.
|IEC 404-8-4 (1986)||EN 10106 (1995)||AISI||ASTM A677 (1989)||JIS 2552 (1986)||GOST 21427 0-75|