Cold Rolled Steel Coils - Steel Coils Manufacturers, Cold Rolled Coils Suppliers, Steel Coils Suppliers India

The Manufacturing process utilizes the latest technology and the most modern equipment for cold rolling, for producing high quality cold rolled steel coils & sheets. The process includes judicious selection of H.R. coils, that are sourced from best in country or from imports and then providing them cold reductions which are suited to develop. Desired mechanical properties & crystallographic orientation subsequent to annealing & skin pass.

Pickling
-In semi-continuous pickling line surface oxide layer of H.R. Coils are removed by the action of warm hydrochloric acid , which is subsequently rinsed by cold & hot water such that pickled H.R. coils does not carry any acid & is neither under or over pickled.

Cold Rolling
-The process consists of reducing thickness of hot rolled coils to desired thickness in several passes (according to set pass schedule). This results in :- a) Closer dimensional tolerance. b) Improved shape. c) Improved surface.

Annealing

- Steel after undergoing cold rolling become very hard because of work hardening & has got only limited use e.g. galvanizing because of loss of ductility. In order to restore Ductility, Formability, C.R. coils are annealed in protective Nitrogen - Hydrogen atmosphere such as to attain desired grain size and orientation. This process results in improvement in formability related properties & also in its microstructure.

Skin Passing

-Skin passing of annealed cold rolled steel coils is carried out for following:

a) To suppress the yield point phenomenon which can cause stretcher strains on formed component.
b) To remove the wrinkles & achieve flatness that is caused due to annealing.
c) To impart matte or bright finish depending on customers requirements.

In addition to this semi-processed electrical steels are given about 7-8% critical reduction such as to improvise their magnetic properties.

Slitting and shearing
-After skin passing the coils are slit to the required width, by the precision slitting machine. -The coils are further sheared to the desired length facility. -The coils / sheets thus supplied to the exact sizes for end users improve the yield of CR rolled steel and sheets.

Oiling & Packing
-The coils are provided with an uniform coating of special rust preventive oil to guard against rusting, atmospheric corrosion & to allow storage for long duration. -The oil can be easily removed in normal degreasing. -The coils/sheets are securely packed in bituminoid polyethylene lined Hessian and tied with steel straps to avoid any damage in handling and storage.

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Products	Range \| Features
Technology	Pickling \| Cold Rolling \| Annealing \| Skin Passing \| Slitting and shearing \| Oiling & Packing
Applications	C.R. Strips/Sheets can be custom made for the following end use applications....
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