Cold Rolled Sheet

Cold-rolled steel sheets are precision-engineered metal plates produced through cold rolling, combining excellent ductility with high dimensional accuracy. Thickness tolerances can be controlled within ±0.01mm, featuring a smooth, clean surface free of scale.

At Wanzhi Steel, we leverage advanced rolling mills and process control to offer a wide range of specifications: thicknesses from 0.12 to 3.0mm and widths from 600 to 1500mm. We can produce both standard dimensions and customized specifications.

Cold Rolled Sheet Specification

Item	Cold roll sheet
Thickness	0.12 – 3.0mm
Width	600-1500mm
Length	As your requirements
Grade	Q195, Q235, DC01, SPCC, SPCD, SPCE, DC01, DC03, DC04, DC05, DC06, CS Type B/C, ST12, etc
Standard	GB, EN, ASTM, JIS, DIN
Surface Treatment	Chromated and Oiled, and Anti-fingerprint
Hardness	Softy, half hard, hard quality
Technology	Cold Rolled
Processing Service	Welding, Punching, Cutting, Bending, Decoiling
Delivery time	10-35 days after the confirmed order
MOQ	25 tons

Cold rolled sheet production video

What is Cold Roll Sheet?

Cold-rolled steel sheets are produced using hot-rolled steel coils as base material. At room temperature (or below the steel’s recrystallization temperature), the material undergoes multiple passes through cold rolling mills followed by finishing processes such as annealing. Finally, it is processed through leveling and shearing (or slitting) to achieve the specified sheet dimensions.

Cold Rolled Sheet Production Steps

• Hot-rolled coil pretreatment: Surface scale is removed via acid pickling, followed by cleaning and drying to ensure substrate purity and impurity-free conditions.
• Multi-pass cold rolling: Pretreated coils enter precision cold rolling mills, where multiple sets of rollers progressively apply pressure to reduce thickness until target dimensions are achieved.
• Annealing: For plates requiring further processing, heated annealing in a protective atmosphere eliminates internal stresses and restores plasticity and toughness;
• Flatness Calibration: A leveling machine adjusts plate flatness and precisely controls thickness tolerances;
• Finished Product Cutting: Finally, CNC shearing machines cut the material to the required dimensions, producing finished cold-rolled steel plates.

 

Benifits

1. Superior Surface Quality

Cold rolling is performed at room temperature, eliminating high-temperature oxide scale formation. The surface is smooth, flat, clean, and flawless. Custom finishes such as mirror-like or matte effects can be achieved as needed. It can be directly used for subsequent processes like spraying or electroplating without additional grinding, making it particularly suitable for applications demanding high aesthetic standards, such as appliance housings and decorative panels.

2. Exceptional Dimensional Accuracy

Thickness tolerances are precisely controlled within ±0.01mm, with thickness consistency far surpassing hot-rolled steel sheets. This meets stringent dimensional tolerance requirements for precision mechanical parts and automotive core components, reducing machining allowances and rework costs.

3. Superior mechanical properties

Cold rolling increases the strength and hardness of steel plates. Because the metal grains are refined and elongated during processing, the mechanical properties are improved. Both the yield strength and tensile strength and process performance are better than hot-rolled thin steel plates, with higher strength and hardness and reduced ductility.

Applications

Cold-rolled steel can be used directly in certain applications or serve as substrate material for color-coated steel, commonly employed in the following scenarios:

• Automotive Manufacturing: Body panels (doors, hoods, fenders), structural components, and interior parts.
• Home appliance production: Frequently used in manufacturing refrigerator side panels, washing machine housings, and air conditioner outdoor unit frames.
• Office furniture and enclosures: Fabricated into filing cabinets, computer cases, industrial control consoles, etc., through bending and welding processes.
• Base material: Serves as the standard substrate for products like color-coated steel, GI steel, and GL steel.
• Steel pipe manufacturing: Processed into square tubes, round tubes, and various other steel pipes through welding, rolling, and other techniques.

Mechanical Properties of Commonly Used Cold-Rolled Steel Substrates

Grade	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HV)	Applicable Processing Method
Q195	315-430	≥195	≥33	70-90	Simple bending and shearing
SPCC	320-450	≥130	≥31	75-95	Stamping and welding
SPCD	330-460	≥140	≥34	78-100	Complex bending and shallow drawing
SPCE	330-460	≥150	≥36	80-105	Deep drawing and precision stamping
DC01	320-450	≥120	≥33	70-95	General structural component processing
DC04	330-460	≥140	≥38	75-100	Automotive parts stamping
DC06	340-480	≥160	≥40	80-105	High-end automotive outer panel drawing

Cold rolled plate VS hot rolled plate

Since cold-rolled sheet is processed on the basis of hot-rolled sheet, its various performances are better than those of hot-rolled sheet, as listed below:

1. Surface quality: The surface of a hot-rolled sheet is relatively rough, while the surface of cold-rolled sheet is smoother and cleaner, without scale and surface defects.

2. Dimensional accuracy: As mentioned above, the thickness tolerance of a cold-rolled sheet can be as low as ±0.01mm, so the dimensional accuracy of cold-rolled sheet is higher and the thickness consistency is better, which is an upgraded version of a hot-rolled sheet.

3. Mechanical properties: The strength and hardness of cold-rolled sheets are higher, which is suitable for products with precision and high strength requirements.

4. However, hot-rolled sheets also have unique application scenarios, such as construction steel, bridges, shipbuilding, etc., which require large-size and high-strength structural parts.

5. Price: The price of the cold-rolled sheet is higher than that of the hot-rolled sheet.

Cold-rolled Steel Direct Supply – Wanzhi Steel

As you can see, cold-rolled steel has a wide range of applications across numerous industries. Wanzhi Steel Factory has a monthly production capacity of 2,500 tons, specializing in the production of cold-rolled and hot-rolled steel, as well as steel processing and related services.

• The company has obtained multiple certifications including ISO9001, CE, and SGS, with products successfully exported to over 120 countries.
• We maintain rigorous testing procedures covering performance, specifications, composition, and other parameters, and support third-party inspections.
• Our extensive product range includes high-quality galvanized steel, galvanized-aluminum steel, and color-coated steel, with complimentary samples available.

If you are interested in cold rolled steel or have other questions, do not hesitate to contact us. Wanzhi Steel is always ready to answer you.