10F, Building B, Erqi Center, Erqi District,
Zhengzhou City, Henan Province, China
Cold rolled steel coil is widely used in many applications, such as automobiles, electric appliances, furniture, etc. Wanzhi Steel is a manufacturer of cold-rolled steel, which can supply cold rolled steel, pickled steel, and annealed steel in coils, sheets, and strips. Our factory has two sets of four-roll rolling mills with an annual production of 200,000 tons. The thickness is available from 0.5 mm to 3 mm and the width ranges from 600 mm to 1,250 mm. Welcome to contact us for more details!
|Item||Colo Rolled Steel Coil|
|Thickness||0.5 mm-3 mm|
|Width||600 mm-1,250 mm|
|Length (CR Sheet)||1,200 – 6,000 mm|
|Coil Weight||5-13.5 tons (can be customized)|
|Codes||Q195A-Q235A, Q195AF-Q235AF, Q295A(B)-Q345 A(B);
SPCC, SPCD, SPCE, ST12-15; DC01-06
|Delivery Time||7-30 days (mainly depending on the order quantity)|
|Processing Service||Bending, Cutting, Slitting, Punching, etc.|
|Main Applications||Hardware, manufacturing pipes, etc.|
|Package||Standard Export Package|
1. High strength: 20% stronger than hot-rolled steel
2. High surface quality – smooth and easy to paint
3. Close tolerances
4. Good formability
5. Poor toughness and weldability
The cold-rolled steel coil is commonly used for applications that require close tolerances, high strength, and high surface finish quality. It is also the base metal of galvanized steel coil. Here are its applications:
1. Automobile components, such as corrosion-resistant parts of cars, etc.
2. Light industry, such as home appliance shells, civil chimneys, kitchen utensils, etc.
3. Construction uses, such as roof panels, roof grilles, etc.
4. Base metal of color coated steel, galvanized or galvalume steel.
Cold rolled steel coil (CR coil) is essentially hot-rolled steel. After the scale is removed by pickling, it is continuously cooled at room temperature and then annealed and temper-rolled. During continuous cold rolling, the strength and hardness of the hard rolled coil increase, and the ductility and plasticity decrease. Also, the steel coil is with tighter dimensional tolerances and better surface finishes.
SPCC steel is a commercial grade of cold-rolled steel defined by Japanese manufacturing standard JIS G 3141. It is equivalent to China grade Q195 and Q215A. While SPHC steel is a commercial quality hot rolled steel. Below are its mechanical properties.
Tensile strength is at least 270 N/mm2(MPa); while yield strength is ≤240 N/mm2(MPa).
DC01 (tensile strength 270 – 410 MPa)– This grade can be used for simple forming work such as using bending, embossing, crimping, and stretching.
DC02/DC03 – These grades are suitable for forming requirements such as deep drawing and difficult profiles.
DC04 – This quality can meet high deformation requirements.
DC05/06/07 – These deep drawing quality grades are suitable for higher forming and deformation requirements. Below are their mechanical properties.
|Steel Code||Yield Strength||Tensile Strength||Elongation A80mm||Plastic Strain Ratio r90||Strain Hardening Exponent n90|
|DC02||140-240 MPa||270-370 MPa||≥34||≥1.4|
|DC03||120-210 MPa||270-350 MPa||≥38||≥1.8||≥0.18|
|DC04||120-180 MPa||270-350 MPa||≥40||≥2.0||≥0.20|
SPCC, SPCD, SPCE Materials
|Steel Code||Yield Strength Relb||Tensile Strength||Plastic strain ratio r90e||Strain hardening exponent n90d|
|SPCC||130-300 MPa||270-410 MPa|
|SPCD||120-240 MPa||270-370 MPa||≥1.3|
|SPCE||120-210 MPa||270-350 MPa||≥1.8||≥0.18|
The production process of cold rolled coils varies slightly according to the raw materials and the varieties and specifications of the products. Here is the making process of cold rolled steel.
Raw Material (Hot rolled steel)- Pickling – Cold Rolling – Degreasing – Annealing – Rolling up – Packaging
1. Pickling. Hot-rolled coils pass through a pickling line to remove oxide scale on the surface by using hydrochloric acid solutions. Through the pickling process, there will be fewer surface flaws left.
2. Cold rolling. Pickled coils are rolled to a specified thickness in the cold-rolled mill.
3. Annealing. After removing the lubricant oil and contaminants by electrolytic cleaning, the coil will go through the continuous annealing process. It aims to make steel products with high tensile strength.
4. Rolling up into coils and then packaging for sale.
The market price is around USD 500-700 per ton. And it will be different with many factors. Since CR coil undergoes a complex production process and the level of operation required is high, it takes more time and costs more to produce. When making a selection of cold rolled coils, do not go overboard for low prices, but ensure the quality of the product. In addition, the steel market is highly volatile due to the import and export tariffs. In recent months, steel prices are rising, which will also increase the price of cold-rolled coils.
There are many cold rolled steel coil suppliers all over the world. Please make sure to choose a reputable one, for example, Wanzhi Steel. As a leading steel products manufacturers in China, we have our own factory in Shandong Province. We develop a professional team to produce CR steel coil with precise dimensions, beautiful surfaces, and good mechanical properties. Besides, there is a strict quality control system. You can come to check your coils on site. Also, the third-party inspection is acceptable. More than that, we have a full-service system. If you have any problem when receiving goods, please feel free to contact us. We will get back to you in 12 hours. Wanzhi Steel also offers great discounts for bulk orders. Welcome to contact us for the latest price.