Basic Raw Material

The basic raw material ‘Cold Rolled Grain Oriented (CRGO) Steel’ is used for manufacturing both Lamination and Wound Cores. Evergreen is authorized importer of reputed overseas mills of Germany, France, and U.S.A, in various grades of different permeability. Basically, there are many types of CRGO Steel eg. M-3, M-4, M-5 and M-6 grade and HI-B Material. These raw materials are imported in the forms of mother coils having standard width of 750/1100 mm. Evergreen keeps necessary stocks of all grades to fulfill customer’s requirements.

CRGO material has the least figure of maximum core loss in the rolling direction. With the increased shearing angle to the rolling direction, the core loss at any particular flux density goes up and becomes generally highest in the transverse direction. Because of this it is possible to use CRGO in static electrical machines which include all types of power transformers, distribution transformers, reactors, audio transformers etc.

Manufacturing Mills of CRGO Steel do guarantee the core loss figure at flux density of 1.5 Tesla for conventional grain oriented steel and at 1.7 Tesla in case of HI-B and HI-B-LS steel.

The grades of material popularly used are M-3, M-4, M-5 and M-6. We also use, for special requirements of the customers, HI-B Material designated as MOH, TRAN-COR, ZH, ZDKH, ZDMH.