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Help CenterSteel Coil & Strip & Hot Rolled Coil，Q235B、SS400、Q345B、Q355B、Q215、SPHC
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1. Product Definition
Hot Rolled Coil, also known as hot rolled coil plate or hot coil, is a basic industrial steel product processed by high-temperature hot rolling technology. The steel billet is heated above 1200℃, continuously rolled and formed through rough rolling and finish rolling, and finally coiled into strip-shaped coils. It is one of the most widely used and highly versatile core steel materials in the industrial field. Our factory’s Carbon Hot Rolled Coil and High Strength Hot Rolled Coil feature pure material, flat plate surface and stable performance. They can be directly processed through flattening, slitting, bending and welding, and are widely applied in machinery manufacturing, steel structure engineering, auto parts, pipe processing, engineering equipment and other industries, serving as essential basic profiles for the manufacturing industry.
2. Core Product Advantages
Stable and Reliable Material Performance: Processed by high-temperature rolling and grain refinement, Hot Rolled Coil has a uniform and dense internal structure, good toughness, moderate strength and excellent plasticity without residual internal stress. It is not prone to cracking and deformation during subsequent bending, stamping and welding processes, delivering superior processing performance.
Excellent Plate Surface Quality:Carbon Hot Rolled Coil features a flat and smooth surface, uniform thickness and regular plate shape without edge warping, wavy deformation, peeling, slag inclusion and other defects. It has a uniform surface oxide layer and can be used for direct processing or subsequent pickling and spraying treatment.
Wide Adaptability and Convenient Processing: Hot Rolled Coil supports various secondary processing procedures including flattening and shearing, longitudinal slitting, bending forming, punching and welding. No complicated pre-treatment is required, which meets conventional and special-shaped processing needs and ensures high production efficiency.
Strong Bearing Capacity: The high-strength High Strength Hot Rolled Coil has outstanding pressure resistance, tensile resistance and impact resistance, which can meet the heavy-load working conditions of steel structure bearing, equipment shell, construction machinery accessories and ensure high structural safety.
High Cost Performance and Stable Supply: With sufficient raw materials, mature technology and large-scale production capacity, Hot Rolled Coil costs less than special steel materials. It is suitable for large-scale engineering procurement and is the preferred basic steel for industrial production and infrastructure projects.
3. Common Material Grades
Ordinary Carbon Steel: Q235B, SS400. As the mainstream material for Carbon Hot Rolled Coil, it balances toughness and plasticity with extremely high cost performance, suitable for most ordinary processing, steel structure and sheet metal working conditions.
Low Alloy High Strength Steel: Q345B, Q355B. Classic materials for High Strength Hot Rolled Coil with higher strength, excellent impact resistance and fatigue resistance, widely used in construction machinery, load-bearing structures and equipment bases under heavy-load scenarios.
Special Engineering Steel: Q215, SPHC. Featuring soft texture and superior stamping performance, Hot Rolled Coil made of these materials is mostly used for hardware accessories, stamping parts, thin-wall processing and pipe production.
4. Specification Parameters
Thickness Range: 1.5mm–20mm. Full-thickness Hot Rolled Coil specifications are available. Thin materials adapt to sheet metal processing, while thick materials are suitable for load-bearing structures.
Width Range: 1000mm–1800mm. Conventional mainstream widths include 1250mm, 1500mm and 1800mm, and customized narrow-width coils are supported.
Coil Weight Range: 5 tons–30 tons per coil. Custom coil splitting, fixed-length flattening and non-standard customization are available.
Dimensional Accuracy: The thickness and width tolerances strictly comply with national standards. Carbon Hot Rolled Coil and High Strength Hot Rolled Coil feature flat plate shape, uniform thickness and small dimensional deviation with high processing adaptability.
5. Production Process
High-quality steel billet feeding → High-temperature furnace heating (above 1200℃) → Repeated rolling and shaping by rough rolling → Precision finish rolling → Laminar cooling and temperature control → High-speed coiling and forming → Straightening and leveling → Surface quality inspection → Dimensional re-inspection → Marking and packaging → Finished product warehousing. The complete and mature hot rolling process ensures unified performance and stable quality of every Hot Rolled Coil, Carbon Hot Rolled Coil and High Strength Hot Rolled Coil.
6. Execution Standards
GB/T 700 Technical Standard for Carbon Structural Steel
GB/T 1591 Standard for Low Alloy High Strength Structural Steel
GB/T 3274 Hot Rolled Thick Steel Plates and Strips of Carbon and Low Alloy Structural Steel
7. Main Applications
Steel Structure Engineering: Factory steel frames, load-bearing supports, steel structure frames and embedded parts. A large number of flattened plates processed from Hot Rolled Coil are adopted for stable performance and reasonable cost.
Machinery Manufacturing Industry: Mechanical equipment shells, bases, brackets, guard plates and stamping parts. Carbon Hot Rolled Coil is selected for conventional working conditions, while High Strength Hot Rolled Coil is preferred for heavy-duty equipment.
Pipe Processing Industry: Base materials for spiral welded pipes and straight seam welded pipes, as well as raw materials for various industrial conveying pipelines and steel structural pipes, serving as the core base material for pipe processing.
Automobile and Transportation Industry: Automobile chassis parts, carriage plates, construction machinery car bodies and agricultural machinery structural parts, relying on the excellent stamping and welding performance of Hot Rolled Coil.
Hardware Sheet Metal and Infrastructure: Widely used in hardware products, sheet metal processing, equipment shields, bridge auxiliary structures and municipal engineering components.
8. Delivery Cycle
Conventional Stock Hot Rolled Coil: In-stock Carbon Hot Rolled Coil and High Strength Hot Rolled Coil with mainstream specifications (Q235B, Q355B) can be delivered within 3–5 working days after payment confirmation.
Fixed-size Flattening / Slitting Orders: The processing cycle for Hot Rolled Coil requiring flattening, longitudinal shearing and slitting is 5–7 working days.
Special Specification / Large-batch Orders: Custom orders with non-standard thickness, width and large batch quantity will be delivered within 7–15 working days according to inventory and production schedule.
Urgent Orders: Priority production and expedited processing are available for urgent processing orders.
9. Quality Inspection
All factory Hot Rolled Coil, Carbon Hot Rolled Coil and High Strength Hot Rolled Coil undergo strict factory inspection procedures, including chemical composition analysis, tensile and yield mechanical performance tests, surface defect detection and dimensional tolerance verification. Products with peeling, cracks and uneven thickness are strictly prohibited from delivery. Quality inspection reports are provided for each batch with traceable quality, fully meeting the acceptance standards of formal engineering projects.
10. Packaging Method
Conventional Industrial Packaging: The coil surface is wrapped with waterproof and moisture-proof paper and anti-rust protective layers, and reinforced with steel strips to prevent moisture, collision and loose coiling during transportation, ensuring the integrity of finished Hot Rolled Coil.
Precision Processing / Export Packaging: Finished Carbon Hot Rolled Coil and High Strength Hot Rolled Coil plates after flattening and slitting are packed with pallets, corner protection and film moisture-proof treatment, suitable for long-distance transportation and foreign trade delivery.
11. Storage and Usage Precautions
Hot Rolled Coil, Carbon Hot Rolled Coil and High Strength Hot Rolled Coil shall be stored in dry and ventilated indoor warehouses. Long-term outdoor stacking and rain washing are prohibited to avoid rusting and excessive surface oxidation caused by humid environments. Coils shall be stacked by category and elevated off the ground to prevent extrusion deformation, scratches and coil collapse hazards. Surface oxide scales can be cleaned before processing and use. Overload and over-condition use are forbidden. High-strength steel materials shall be matched with corresponding heavy-load scenarios to extend the service life of steel materials and ensure the quality of processed products and construction safety.
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