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Help CenterSteel Coil & Strip & Cold Rolled Steel Coil,SPCC、SPCD、SPCE、Q355、Q460
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Detailed Description of Cold Rolled Steel Coil Products
Cold rolled steel coils are steel products made from hot rolled steel plates through cold rolling, annealing, tempering, coiling and other processes at room temperature. Compared with hot rolled steel coils, they have core characteristics such as flat and smooth surface, high dimensional accuracy, uniform thickness, stable mechanical properties and low surface roughness. They do not require subsequent pickling and derusting treatment and can be directly used for deep processing. They are widely used in home appliance manufacturing, automotive industry, architectural decoration, electronic equipment, food packaging, precision instruments and many other fields, and are indispensable basic steel raw materials in modern manufacturing industry.
I. Product Application
The cold rolled steel coils produced by our company have complete specifications and excellent quality, and are suitable for various deep processing and direct use scenarios. The specific application categories are as follows:
Home Appliance Manufacturing: Processing of shells, liners and parts of refrigerators, washing machines, air conditioners, televisions and other home appliances. Taking advantage of their smooth surface and easy stamping and forming characteristics, they improve the appearance texture and product accuracy of home appliances;
Automotive Industry: Manufacturing of automotive bodies, doors, chassis, interior parts and other parts. The selection of high-strength cold rolled steel coils can reduce the body weight, improve the body rigidity, and meet the needs of automotive lightweight, energy conservation and environmental protection;
Architectural Decoration: Indoor suspended ceilings, wall decoration, door and window frames, hardware accessories, etc. can be subjected to surface spraying and film covering treatment according to needs, which are both beautiful and durable;
Food Packaging: Food cans, packaging boxes, fresh-keeping boxes, etc. Food-grade cold rolled carbon steel coils are selected, which meet food safety standards, are corrosion-resistant and odorless, and ensure food storage safety;
Electronic Equipment: Shells and brackets of mobile phones, computers and other electronic products. Taking advantage of their high dimensional accuracy and easy cutting and processing characteristics, they are suitable for the manufacture of precision parts;
Other Fields: Precision instrument shells, medical device parts, hardware tools, pipe fittings, etc. Cold rolled steel coils with corresponding specifications and performance can be customized according to different working conditions.
II. Material Characteristics and Model Designations
The materials of cold rolled steel coils are mainly carbon steel and alloy steel. The model designations strictly follow national standards and are divided into different grades according to application, mechanical properties and surface state. The core materials and designations are as follows:
Cold Rolled Carbon Steel Coils: The mainstream designations are SPCC, SPCD, SPCE (national standard GB/T 11253-2007). Among them, SPCC is a general-grade cold rolled plate coil with a pickled surface, suitable for general stamping and bending processing; SPCD is a stamping grade with good toughness, suitable for medium-difficulty stamping; SPCE is a deep drawing grade with high elongation, which can be used for deep stamping processing of complex shapes (such as home appliance liners and automotive interior parts). In addition, there are Q195 and Q235 cold rolled carbon steel plate coils, which are suitable for structural parts with certain strength requirements.
Cold Rolled Alloy Steel Coils: The main designations are Q355, Q460 and other low-alloy high-strength steels. Adding alloy elements such as manganese and silicon, their strength is higher than that of ordinary carbon steel, and they have both toughness and wear resistance, suitable for heavy-load and stress-bearing parts such as automotive chassis and engineering machinery parts.
Special Treated Cold Rolled Steel Coils: Including annealed cold rolled steel coils (eliminating processing stress, improving toughness, and facilitating deep processing), pickled cold rolled steel coils (removing surface oxide scale and improving surface finish), galvanized cold rolled steel coils (galvanized surface to enhance corrosion resistance), and color-coated cold rolled steel coils (surface sprayed with color coating, which is both beautiful and anti-corrosive, suitable for architectural decoration).
All materials are strictly selected and comply with national standards. The surface is free of oxidation, scratches and inclusions, and the mechanical properties and dimensional accuracy have reached the high-quality level of the industry, which can meet the use needs of different fields such as home appliances, automobiles, architecture and electronics.
III. Specifications and Models
Our company's cold rolled steel coils cover a variety of standard specifications and support customization on demand. The specific parameters are as follows, which can accurately match the processing and use needs of different customers:
Thickness: 0.15mm-3.0mm (conventional thickness 0.3mm-2.0mm, thin specification 0.15mm-0.3mm suitable for electronic and packaging fields, thick specification 2.0mm-3.0mm suitable for structural part processing);
Width: 1000mm, 1219mm, 1500mm (conventional standard width), any width within 500mm-1800mm can be customized according to customer needs;
Coil Weight: 2-15 tons (conventional coil weight 5-10 tons, small and large coil specifications can be customized according to transportation and processing needs);
Surface State: Pickled surface, bright surface, matte surface, galvanized surface, color-coated surface. The corresponding surface treatment method can be selected according to the application;
Accuracy Grade: Ordinary accuracy and high accuracy. The dimensional deviation of high-precision cold rolled steel coils is ≤±0.02mm, which is suitable for the processing of precision instruments and electronic equipment parts.
IV. Product Performance
High Dimensional Accuracy: Adopting room temperature cold rolling process, it has uniform thickness, small width deviation, flat and smooth surface, no unevenness, scratches and other defects. It can be directly used for deep processing without subsequent processing and polishing, improving production efficiency.
Stable Mechanical Properties: After annealing treatment, processing stress is eliminated, toughness and elongation are excellent, stamping, bending and shearing performance are good, and it is not easy to break or deform, which is suitable for processing complex shapes.
Excellent Surface Quality: Low surface roughness, no oxide scale, rust, inclusions and other defects. It can be directly subjected to surface treatment such as spraying, film covering and electroplating, with strong adhesion and improved product appearance texture.
Good Corrosion Resistance: Ordinary cold rolled steel coils and cold rolled alloy steel coils can improve their corrosion resistance through pickling, galvanizing and other treatments, and can adapt to complex environments such as humidity and mild acid-base, meeting the use needs of most fields.
Strong Adaptability: Products with different materials, specifications and surface states can be customized according to applications, which are both universal and targeted, covering home appliances, automobiles, architecture, electronics and many other fields, meeting the personalized needs of different customers.
V. Processing Technology
Cold rolled steel coils are processed by advanced production and processing technologies, and the quality is strictly controlled throughout the process to ensure stable product performance and excellent quality. The specific technological process is as follows:
Raw Material Screening: High-quality hot rolled steel coils are selected as raw materials, and strict physical and chemical testing is carried out to ensure that the raw materials are free of inclusions, rust and meet the mechanical performance standards;
Cold Rolling Processing: The hot rolled steel coils are rolled at room temperature. By precisely controlling the rolling speed and rolling pressure, the uniform thickness and flat surface of the plate are ensured, and the product accuracy and mechanical properties are improved;
Annealing Treatment: The cold-rolled steel coils are sent to the annealing furnace for high-temperature annealing to eliminate processing stress, improve the toughness and elongation of the steel, and facilitate subsequent deep processing such as stamping and bending;
Tempering Treatment: The annealed steel coils are tempered by a tempering machine to correct the surface flatness, adjust the steel hardness, and ensure the surface is smooth and the size is accurate;
Surface Treatment: According to customer needs, surface treatments such as pickling, galvanizing and color coating are carried out to improve the corrosion resistance and appearance texture of the product;
Coiling and Testing: The treated steel plates are coiled into coils. Each batch of products undergoes multiple processes such as dimensional testing, surface testing and mechanical performance testing to ensure that the products meet the standards before leaving the factory.
VI. Quality and After-Sales Service
Our company produces cold rolled steel coils in strict accordance with national standards such as GB/T 11253-2007, and has established a complete quality control system. From raw material procurement to finished product delivery, the whole process is traceable to ensure that each batch of products is stable and reliable in quality.
Quality Assurance: Each batch of products is provided with material testing reports and dimensional testing reports to ensure that the product material, performance and specifications meet customer requirements; the product surface is free of scratches, rust and inclusions, and the dimensional deviation is controlled within the standard range.
Delivery Cycle: The delivery cycle for conventional specification cold rolled steel coils is 5-7 days.
Customization Service: Support customization of cold rolled steel coils with different thicknesses, widths, coil weights, materials and surface states according to needs. According to the technical parameters and processing requirements provided by customers, precise matching production is carried out to meet personalized use needs.
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