Cold Rolled Coils

Item	Colo Rolled Steel Coil
Thickness	0.5 -3mm
Width	600 -1250mm
Coil Weight	5-13.5 tons or as required
Grade	Q195-Q235, SPCC, SPCD, SPCE, ST12-15; DC01-06, etc.
Hardness	Softy, Halfhard, Hardquality
Surface	Coating, spraying, embossing, electroplating, etc.
Annual production	200,000 Tons
Delivery Time	7-30 days (mainly depending on the order quantity)
Processing Service	Bending, Cutting, Slitting, Punching, etc.
Package	Standard Export Package

Cold rolled coil production video

Cold rolled steel production process

Raw material (hot rolled steel) → raw material pickling → cold rolling → degreasing → annealing → coiling → packaging, the following cold rolled steel production process is described in detail:

1. Pickling: hot rolled coils through the pickling line, the use of hydrochloric acid solution to remove the surface oxide skin. Through the pickling process, less surface defects are left behind.
2. Cold Rolling: pickled coils are rolled to the specified thickness in a cold rolling mill.
3. Annealing: through electrolytic cleaning to remove lubricants and contaminants, the coil will be continuous annealing process. The purpose is to manufacture steel with high tensile strength.
4. Coiling and Packaging: annealed cold rolled coils are transported to the coiling equipment for coiling, followed by inspection and packaging.

Cold rolled steel coil characteristics

• high strength: cold rolled steel as far as physical properties are concerned, cold rolled steel is stronger, the strength is 20% higher than hot rolled steel.
• smooth surface: due to the cold rolled steel surface is not easy to oxidize, cold rolled steel surface shows a very good finish, and easier to paint.
• More accurate dimensions: Cold rolled steel has higher accuracy in longitudinal and transverse dimensions due to the characteristics of the production process.

Cold rolled steel coil applications

In the automotive industry, cold-rolled steel coil, due to its high dimensional accuracy, excellent wear resistance, and strong impact resistance, is commonly used in the following automotive components:

1. Automotive body panels and doors;
2. Car seats and mailboxes;
3. Chassis components and brackets.

Due to its exceptionally smooth, aesthetically pleasing surface and high strength, cold-rolled steel coil is ideal for products requiring a high level of aesthetic appeal, such as:

1. Home appliance panels like refrigerators and washing machines;
2. Computer cases and office filing cabinets;
3. Metal furniture panels and supports.

Due to its high surface finish and ease of processing, cold-rolled steel coil is often used as raw material for other types of steel coil, such as:

1. Hot-dip galvanized steel coil;
2. Electrogalvanized steel coil;
3. Cold-rolled steel sheet;
4. Cold-rolled steel strip.

Cold rolled steel theoretical weight table

Thickness/mm	Theoretical weight /(kg/m²)	Thickness/mm	Theoretical weight /(kg/m²)	Thickness/mm	Theoretical weight /(kg/m²)
0.2	1.57	0.9	7.065	2.5	19.625
0.25	1.936	1	7.85	2.8	21.98
0.3	2.355	1.1	8.635	3	23. 550
0.35	2.748	1.2	9.42	3.2	25.12
0. 40	3.14	1.3	10.205	3.5	27. 475
0.45	3.533	1.4	10.99	3.8	29.83
0.55	4.318	1.5	11.775	3.9	30.615
0.6	4.71	1.6	12.56	4	31. 400
0.65	5.103	1.7	13.345	4.2	32.97
0.7	5.495	1.8	14.13	4.5	35. 325
0.75	5.888	2	15.7	4.8	37.68
0.8	6.28	2.2	17.27	5	39.25