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Hot Rolled Steel Coil
Construction Engineering：Used as load-bearing components for workshops, bridges and steel structural frames, suitable for various large-scale infrastructure projects.
Machinery Manufacturing：Manufacture heavy-duty structural parts such as machine tool bases, engineering machinery components and agricultural machinery frames.
Automotive Industry：Raw material for producing core components such as vehicle frames, chassis and wheels.
Pipeline Manufacturing：Processed into spiral welded pipes and straight seam welded pipes for oil, natural gas transmission and water supply & drainage systems.
Home Appliance Manufacturing：Applied to the shells and internal supporting structural parts of refrigerators and washing machines.
2.Product Advantages
Excellent Mechanical Properties：High-temperature rolling process endows the product with high strength, good ductility and strong impact resistance.
Flexible Specifications：Thickness, width and grade can be customized to meet the personalized needs of different industries.
High Cost-Effectiveness：Mature production process and mass production reduce unit cost, suitable for large-scale procurement projects.
Good Processability：Easy to cut, weld and bend, convenient for subsequent forming and processing, improving production efficiency.
Wide Application Range：Covers construction, machinery, automotive and other fields with strong versatility.
3.Technical Parameters
Parameter | Specification Range | Standard / Notes |
Steel Grade | Q235B, Q355B, S235JR, S355JR, ASTM A36 | GB/T / EN / ASTM |
Coil Thickness | 1.8–12.7 mm | ±0.05 mm tolerance |
Coil Width | 1000–1500 mm | ±2 mm tolerance |
Inner Diameter | 508 mm, 610 mm | Standard size |
Outer Diameter | 1200–2000 mm | Custom available |
Coil Weight | 8–25 T | Per coil |
Tensile Strength | 450–600 MPa | GB/T 228.1 standard |
Yield Strength | 235–355 MPa | GB/T 228.1 standard |
Elongation | ≥20% | GB/T 228.1 standard |
Surface Treatment | As-rolled, Pickled | Custom: Galvanized |
4.Production process
Raw material smelting: Scrap steel/liquid iron smelted in blast furnace, cast into billets
Heating & soaking: Billets heated to 1200–1300℃ in reheating furnace
Rough & finish rolling: Hot billets rolled to target thickness through multi-pass rolling
Laminar cooling: Rolled strip cooled to control grain structure
Coiling & finishing: Coiled after cooling, trimmed, inspected and packaged for storage
5.FAQ
Q1:What is the core difference between hot rolled steel coil and cold rolled steel coil?
A1:Hot rolled steel coil is rolled at high temperature, with slightly lower surface precision but high strength and low cost; cold rolled steel coil is rolled at room temperature, with smooth surface and high dimensional accuracy, suitable for scenarios with high requirements for appearance and precision.
Q2:How to treat the surface oxide scale of hot rolled steel coil?
A2:The oxide scale can be removed by pickling and shot blasting processes to improve surface finish and meet the needs of subsequent processing or coating.
Q3:What are the precautions for storage of hot rolled steel coil?
A3:It should be stored in a dry and ventilated warehouse to avoid rain and moisture; it can be covered with moisture-proof film to prevent rust; different grades should be stacked separately to avoid mixing.
Q4:Can hot rolled steel coil be directly used in outdoor scenarios?
A4:Direct use is not recommended. Anti-rust treatments such as painting and galvanizing are required, otherwise it is susceptible to environmental erosion and rust, affecting service life.
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