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Help CenterSteel Coil & Strip & Cold Rolled Steel Coil，Q195 Q215 Q235 SPCC DCO1
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I. Product Definition
Cold Rolled Steel Coil refers to coiled steel products made from hot rolled steel coils as raw materials, which are rolled at room temperature (without heating) by cold rolling mills and subjected to a series of processes such as degreasing, annealing, temper rolling, and finishing. Its production process does not require high-temperature heating. With precise rolling technology, it can achieve thinner thickness, more uniform dimensional accuracy and better surface quality. Compared with hot rolled steel coils, cold rolled steel coils have significant advantages in mechanical properties and surface finish, and are widely used in various precision manufacturing, hardware processing and civil fields.
II. Core Product Features
(1) Excellent Surface Quality
No scale is generated during the cold rolling process, and the surface is flat, smooth and uniform in color, without obvious scratches, pitting, oxide spots and other defects. It can be directly used for subsequent processing without additional polishing, which can greatly improve the appearance quality of end products and is suitable for scenarios with high surface requirements.
(2) High Dimensional Accuracy
Adopting high-precision cold rolling equipment and strictly controlling rolling process parameters, the thickness and width deviation of the steel coil is extremely small. The thickness tolerance can be controlled within ±0.01mm, and the width tolerance meets national and industry standards. It has strong dimensional consistency, which can meet the strict requirements of precision processing, stamping forming and other fields for dimensional accuracy, and reduce the waste loss of subsequent processing.
(3) Excellent Mechanical Properties
Through cold rolling and subsequent annealing and temper rolling processes, the grains of the steel are refined, and the mechanical properties such as tensile strength, yield strength and hardness are significantly improved. At the same time, it has good toughness and plasticity, can withstand various processing methods such as bending, stamping and stretching, is not easy to break or deform, and adapts to the mechanical requirements of different processing scenarios. According to the difference in processing technology, it can be divided into different hardness grades such as full hard, half hard and soft to meet diverse needs.
(4) Diverse Specifications and Strong Adaptability
Different thicknesses, widths, materials and surface treatment methods can be customized according to customer needs, covering various thickness ranges such as thin specifications (0.1mm-3.0mm) and conventional specifications (3.0mm-6.0mm). The width can be flexibly adjusted from 100mm to 1500mm, which can adapt to the production needs of different industries and products with strong versatility.
(5) Optimizable Corrosion Resistance
The basic cold rolled steel coil has a certain degree of corrosion resistance. If further improvement is needed, the anti-rust and anti-corrosion ability can be enhanced through subsequent surface treatments such as galvanizing, tinning and chrome plating, so as to extend the service life of the product, which is suitable for applications in special environments such as humidity, acid and alkali.
III. Main Specification Parameters
Parameter Category |
Specific Description |
Thickness Range |
0.1mm - 6.0mm (can be customized according to needs; conventional commonly used 0.3mm - 3.0mm) |
Width Range |
100mm - 1500mm (conventional widths 1000mm, 1250mm, 1500mm; special widths can be customized) |
Steel Coil Inner Diameter |
Conventional 508mm, 610mm; can be adjusted according to customer needs |
Steel Coil Weight |
Single coil weight 2-30 tons; can be customized according to specifications and transportation needs |
Material |
Carbon steel (Q195, Q215, Q235), low carbon steel, high strength steel, precision alloy steel, etc. |
Hardness Grade |
Soft (HRB 60-80), half hard (HRB 80-100), full hard (HRB 100-120); can be adjusted as needed |
Surface State |
Ordinary cold rolled surface (NO.1), bright cold rolled surface (NO.2), pickled cold rolled surface; subsequent galvanizing, tinning and other treatments can be carried out |
IV. Material Model and Chemical Composition Table
The main materials of this product include common categories such as carbon steel and low carbon steel. The following is the chemical composition (mass fraction) corresponding to the core material models, which meets relevant national standards. Special materials and component ratios can be customized according to customer needs.
Material Model |
C (Carbon) |
Si (Silicon) |
Mn (Manganese) |
P (Phosphorus) ≤ |
S (Sulfur) ≤ |
Remarks |
Q195 |
0.06~0.12 |
≤0.30 |
0.25~0.50 |
0.045 |
0.050 |
Carbon steel, suitable for ordinary hardware processing |
Q215 |
0.12~0.15 |
≤0.35 |
0.35~0.65 |
0.045 |
0.050 |
Carbon steel, good toughness, suitable for stamping |
Q235 |
0.17~0.22 |
≤0.35 |
0.35~0.65 |
0.045 |
0.050 |
Carbon steel, the most widely used, moderate strength |
SPCC (Cold Rolled Low Carbon Steel) |
≤0.12 |
≤0.05 |
≤0.50 |
0.035 |
0.035 |
Low carbon cold rolled steel, smooth surface, excellent stamping performance |
DC01 (Cold Rolled Low Carbon Steel) |
≤0.10 |
≤0.05 |
≤0.45 |
0.035 |
0.035 |
Low carbon cold rolled steel, suitable for precision stamping and home appliance parts |
V. Applicable Application Scenarios
With its excellent characteristics, cold rolled steel coils are widely used in many industries, including precision manufacturing, civil hardware, architectural decoration, automobile industry, home appliance industry, electronic and electrical industry, etc. The specific applications are as follows:
Hardware Processing Field: Used for making stamping parts, hardware accessories, fasteners, cutting tools, kitchenware, door and window hardware, etc. With high precision and good stamping performance, it improves the precision and service life of products.
Home Appliance Industry: Used for manufacturing shells, inner containers and parts of refrigerators, washing machines, air conditioners, televisions and other home appliances. It has a high surface finish and can be directly subjected to subsequent treatments such as spraying and film covering to improve the appearance quality of home appliances.
Automobile Industry: Used for manufacturing automobile bodies, doors, chassis parts, interior parts, etc. It requires high strength and toughness, can withstand complex stamping forming processes, and ensures automobile driving safety.
Architectural Decoration Field: Used for ceilings, wall decorative panels, door and window frames, guardrails, etc. The corrosion resistance can be improved through surface treatment, which adapts to indoor and outdoor decoration needs, and has both beauty and practicality.
Electronic and Electrical Field: Used for electronic component shells, terminals, battery shells, etc. It has high dimensional accuracy, can meet the needs of precision assembly, and has good electrical conductivity and toughness.
Other Fields: Used for medical device parts, packaging materials, pipe fittings, etc. According to the needs of different scenarios, select appropriate materials and specifications to achieve diversified applications.
VI. Quality Standards
This product is produced in strict accordance with relevant national and industry standards. The main implementation standards include: GB/T 708-2019 "Dimensions, Shape, Weight and Allowable Deviations of Cold Rolled Steel Plates and Strips", GB/T 11253-2020 "Cold Rolled Carbon Structural Steel Plates and Strips", GB/T 3274-2017 "Hot Rolled Carbon Structural Steel and Low Alloy Structural Steel Plates and Strips" (raw material standard), etc.
Each batch of products has undergone strict quality inspection, including dimensional accuracy inspection, surface quality inspection, mechanical performance inspection (tensile strength, yield strength, hardness, etc.), chemical composition inspection, etc., to ensure that the product quality meets the standards and customer requirements, and unqualified products are strictly prohibited from leaving the factory.
VII. Storage and Transportation Notes
(1) Storage Requirements
Store in a dry, ventilated and cool warehouse to avoid moisture, rain and exposure to the sun, so as to prevent the steel from rusting and oxidizing; the warehouse floor should be flat and dry, and moisture-proof mats can be laid to avoid direct contact between the steel coil and the ground.
Steel coils should be stacked neatly, and the stacking height should not be too high to avoid deformation of the lower steel coils due to pressure; steel coils of different specifications and materials should be stacked separately and marked clearly for easy management and access.
For cold rolled steel coils without anti-corrosion treatment on the surface, the storage time should not be too long, and it is recommended to process and use them as soon as possible; if long-term storage is needed, anti-rust treatment (such as applying anti-rust oil) can be carried out, and regular inspections should be carried out to deal with rust in time.
(2) Transportation Requirements
During transportation, the steel coils must be fixed firmly to avoid shaking and collision, so as to prevent surface scratches and deformation; special transport vehicles (such as flatbed trucks) can be used, and fixed with steel wire ropes, wooden wedges, etc. to ensure transportation safety.
Avoid transportation in bad weather such as rainy days, snowy days and heavy fog to prevent the steel coils from getting damp and rusted; if transportation is necessary, rainproof and moisture-proof measures (such as covering with rain cloth) should be taken.
During transportation, avoid contact between the steel coil and sharp objects to prevent surface damage; when loading and unloading, it should be lifted and placed gently, and special spreaders should be used to avoid damage to the edge and surface of the steel coil.
VIII. Product Advantages
1. Convenient Processing: The surface is flat and the size is accurate, which can be directly subjected to stamping, bending, cutting, welding and other processing without additional polishing and correction, improving processing efficiency and reducing processing costs.
2. High Cost-Effectiveness: Compared with other steels such as stainless steel, cold rolled steel coils have lower cost, and at the same time have excellent mechanical properties and surface quality, which can meet the use needs of most scenarios with outstanding cost-effectiveness.
3. Strong Customization: According to the specific needs of customers, products with different thicknesses, widths, materials, hardness and surface states can be customized to adapt to diversified application scenarios with high flexibility.
4. Environmental Protection and Energy Saving: The production process does not require high-temperature heating, with low energy consumption, and no large amount of waste gas and waste residue are generated, which meets environmental protection requirements; at the same time, the steel can be recycled and reused, which is green and environmentally friendly.
IX. Delivery Cycle
For conventional specification cold rolled steel coils, the delivery cycle is 5-7 days (calculated from the confirmation of the order and the receipt of the payment); for special customized specifications (such as special materials, special sizes, special surface treatments), the cycle will be adjusted according to the production difficulty. The specific delivery time will be communicated and confirmed with the customer in advance to ensure on-time delivery.
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