Cold Rolled Steel Coil (Cr)

* CHARACTER

Cold rolling at, or above, a 40 percent reduction rate causes the grains of the metal to align in the direction of rolling. And it does undergo finishing processes such as annealing and temper rolling, this result in smooth, attractive surface as well as uniform thickness and flatness. Based on the high workable, they are essentially in their role as the base metal for tinplate, galvanized sheets and other coated steel products

* PRODUCT FEATURES

Cold-rolled steel products have clean surface and excellent drivability. They are also characterized by their superior formality and printability. So CR steel product is currently applied to various fields including automobiles, electric household appliances, and furniture office equipment.

* CLASSIFICATION OF QUALITY

- Commercial Quality (CQ) - Sheet of this quality is for simple bending or moderate forming. Commercial steel sheet can be bent flat upon itself in any direction at room temperature. It has a wide variety of uses, including automotive panels, electrical home appliances, drums, pipes, farm implements, office supplies, building and civil work materials, and as base metal for various coatings.

- Drawing Quality (DQ) - Sheet of this quality has a greater degree of ductility and is more onsistent in performance than commercial steel because of higher standards in production, selection and melting of the steel. It is suitable for automotive panels, audio-visual equipment, and heating apparatuses.

- Deep Drawing Quality (DDQ) - Sheet of this designation should be used when drawing steel will not provide a sufficient degree of ductility for fabrication of parts with stringent drawing requirements, or applications that require the sheet be free from aging. This quality is produced through special steelmaking and finishing practices. It is suitable for automotive front panels and rear fenders.

- Stabilized Deep Drawing Quality (DDQ-N) - Stabilized deep drawing quality products boast the highest quality in terms of workability. It is suitable for automotive parts that require complicated treatment such as front fenders or wire. As a non-aging deep drawing sheet made with Al-killed, quality is guaranteed against extreme stretching or straining.

* SURFACE FINISH

- Dull Finish - Dull finish, which is attained by attaching numerous fine grains onto the steel surface, is often called 'pear-skin finish' or 'egg-shell texture'. The grains are made by steel grit blasted roll. The dull finish is useful in drawing because lubricant oil can be evenly spread over the entire surface, thereby reducing the possibility of friction. The fine grains also help boost paint adherence and extend the steel life span of the steel.

- Bright Finish - Bright finish presents high-quality roughness that is optimal for decorative purposes. The sheet surface is rolled with fine polished rolls.

* EDGE

- Mill Edge - Edges produced by trimming hot rolled coil during the pickling process, prior to cold rolling.

- Slit Edge (Trimmed Edge) - Edges produced by shearing or slitting during the cold rolling process.

* OILING

Sheet that is processed with the final step being the application of oil to the surface; usually intended to provide protection from rusting during shipment and storage. The oil may also serve to assist in the subsequent fabrication process, but this is not usually the main purpose.

We deliver its steel products either oiled (heavy, general or light, dos oiling, powdering) or un-oiled.


* Brand Name : DONG-BU STEEL, UNION STEEL
* Place of Origin : South Korea
* Thickness : 0.30 mm ~ 3.20 mm
* Width : 600 mm ~ 1250 mm
* Min. Order Quantity : 20 ~ 25 MT / one 20ft container
* Price : FOB Busan(negotiation with Mills) + sea freight + commission + insurance premium
* Payment Term : T/T advance 20%, L/C at sight, L/C 90 days from B/L date
* Delivery Time : 45 ~ 60 days from L/C or Mill's option.

export standard steel packing
- coil : horizontal, vertical
- sheet : according to customer's order.