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Help CenterSteel Coil & Strip & Hot Rolled Steel Coil，GB/T 709、GB/T 3274、GB/T 1591、GB/T 3273、EN 10025、JIS G3101、ASTM A36/A572
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Steel Coil & Strip & Hot Rolled Steel Coil，GB/T 709、GB/T 3274、GB/T 1591、GB/T 3273、EN 10025、JIS G3101、ASTM A36/A572NegotiableMOQ: 5 Metric Tons -
Steel Coil & Strip & Hot Rolled Steel Coil，GB/T 709、GB/T 3274、GB/T 1591、GB/T 3273、EN 10025、JIS G3101、ASTM A36/A572NegotiableMOQ: 5 Metric Tons
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Steel Coil & Strip & Hot Rolled Steel Coil，GB/T 709、GB/T 3274、GB/T 1591、GB/T 3273、EN 10025、JIS G3101、ASTM A36/A572NegotiableMOQ: 5 Metric Tons
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Steel Coil & Strip & Hot Rolled Steel Coil，GB/T 709、GB/T 3274、GB/T 1591、GB/T 3273、EN 10025、JIS G3101、ASTM A36/A572NegotiableMOQ: 5 Metric Tons
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Steel Coil & Strip & Hot Rolled Steel Coil，GB/T 709、GB/T 3274、GB/T 1591、GB/T 3273、EN 10025、JIS G3101、ASTM A36/A572NegotiableMOQ: 5 Metric Tons
Hot-Rolled Steel Coil - Product Specification
1. Product Definition & Production Process
Hot-rolled steel coil, commonly known as hot coil, adopts continuous cast slab as raw material. The slab is heated to 1100–1300°C, then rolled into steel strip through roughing and finishing mills. The hot strip is cooled to the specified temperature by laminar cooling system and coiled by coiler. Finishing processes such as leveling, recoiling, slitting and shearing can be applied to produce finished products.
2. Main Specifications
Thickness: 1.2–25.4 mm (thin gauge: 1.2–6.0 mm; medium & heavy gauge: 6.0–25.4 mm)
Width: 800–2130 mm (common sizes: 900/1250/1500/1800/2000 mm)
Coil Weight: 15–32 tons, maximum ≤ 35 tons
Inner Diameter: 760 mm (standard), 850 mm (optional)
Dimensional Tolerance (GB/T 709-2019): Thickness ±0.15 mm; Width ±3 mm; Camber ≤50 mm per 10 meters
3. Steel Grades & Chemical Composition
Ordinary Carbon Steel (Q235B / SPHC)
Q235B: C ≤ 0.21%, Si ≤ 0.35%, Mn: 0.30–0.65%, S ≤ 0.045%, P ≤ 0.045%
SPHC (Stamping Grade): C ≤ 0.15%, Si ≤ 0.05%, Mn ≤ 0.60%, S ≤ 0.035%, P ≤ 0.035%
High Strength Low Alloy Steel (Q355B)
C ≤ 0.24%, Si ≤ 0.55%, Mn: 1.00–1.60%, S ≤ 0.045%, P ≤ 0.045%, with trace microalloys of Nb, V and Ti.
Automotive Structural Steel
SAPH310/370/440, QStE340TM–QStE550TM, 510L/610L/700L (Automotive Frame Steel)
Special Steel
Marine steel (AH32/AH36), Pipeline steel (X42/X52/X65/X70), Weathering steel (Q355NH), Cylinder steel (HP295)
4. Mechanical Properties (Ambient Temperature, Typical Values)
Q235B: Yield Strength ≥ 235 MPa, Tensile Strength: 370–500 MPa, Elongation ≥ 26%
Q355B: Yield Strength ≥ 355 MPa, Tensile Strength: 470–630 MPa, Elongation ≥ 21%
SPHC: Yield Strength ≤ 210 MPa, Tensile Strength: 270–410 MPa, Elongation ≥ 34% (Excellent stamping performance)
5. Execution Standards
Chinese National Standards: GB/T 709 (Dimensions, Shape, Weight and Allowable Deviations), GB/T 3274 (Carbon and Low Alloy Hot Rolled Steel Plates and Strips), GB/T 1591 (High Strength Low Alloy Structural Steel), GB/T 3273 (Hot Rolled Steel Sheets and Strips for Automobile Frame)
International Standards: EN 10025 (European Standard), JIS G3101 (Japanese Standard), ASTM A36/A572 (American Standard)
6. Surface Quality & Product Features
Surface Condition: Hot rolled black surface with oxide scale. Free from cracks, inclusions and severe rust. Slight discoloration, indentations and pits are acceptable if they do not affect normal usage.
Key Features: High strength, good toughness, excellent weldability and formability. Lower cost compared with cold rolled steel coil, stable dimension and flatness.
7. Main Applications
Steel Structure Construction: Factory buildings, bridges, towers, space frames, columns and steel beams
Automobile Manufacturing: Vehicle frames, chassis parts, cross beams, wheel rims and carriage plates
Energy & Pipeline: Oil & gas transmission pipes, welded pipes, pressure vessels and gas cylinders
Machinery Manufacturing: Machine tool bases, gears, sprockets, flanges and stamping parts
Container & Shipbuilding: Container panels, hull plates, decks and hatch covers
8. Packaging & Delivery
Packaging: Horizontally bound, wrapped with anti-rust paper and plastic film, reinforced with steel bands and end protectors. Each coil is attached with a label marked with specification, steel grade, heat number, batch number, weight and production date.
Delivery Lead Time: 5–7 days, shipped from Tianjin Port
Transportation: Truck and sea freight. Keep goods dry and avoid collision during transit.
9. Advantages & Notes
Advantages: Cost-effective, strong processing adaptability, available for direct bending, stamping and welding. Can be used with original oxide scale or pickled for further cold rolling processing.
Notes: Oxide scale exists on the surface, so anti-rust coating or painting is recommended. Dimensional accuracy is lower than cold rolled steel coil, so cold rolled material is suggested for high-precision components.
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