Contact Platform Support
Help CenterSteel Coil & Strip & Hot Rolled Steel Coil，Q235A/Q235B/Q235C/Q235D、Q390、Q420、Q460、Q550、Q690
Related Products
-
Steel Coil & Strip & Cold Rolled Steel Coil，GB/T 13237、GB/T 5213、JIS G3131、EN 10130NegotiableMOQ: 5 Metric Tons -
Steel Coil & Strip & Prepainted Steel Coil，S220GD+Z、S250GD+Z、S320GD+Z、S350GD+Z、S420GD+Z、DX51D+AZ、S350GD+AZ、DX51D+ZM、S350GD+ZMNegotiableMOQ: 5 Metric Tons
-
Steel Sheet & Plate & Pressure Vessel Steel Plate，16Mo3、13CrMo4-5、10CrMo9-10、SA387 Gr11 Cl2、SA387 Gr22 Cl2（2.25Cr-1Mo）NegotiableMOQ: 5 Metric Tons
-
Steel Sheet & Plate & Checkered Plate，2.5、3.0、3.5、4.0、4.5、5.0、6.0、7.0、8.0、10、12、14、16mmNegotiableMOQ: 5 Metric Tons
-
Steel Sheet & Plate & Shipbuilding Steel Plate，AH32、DH32、EH32、FH32、AH36、DH36、EH36、FH36、AH40、DH40、EH40、FH40NegotiableMOQ: 5 Metric Tons
1. Product Definition & Core Overview
Hot Rolled Steel Coil (HRC) is a coiled steel semi-finished product manufactured with continuous casting slabs or blooming slabs as raw materials. The slabs are heated to 1100–1250℃, descaled by high-pressure water, then rolled via roughing and finishing mills, cooled by laminar flow and finally coiled. It is the most fundamental upstream raw material in the steel industry.
Hot rolled coil features excellent plasticity, weldability and low forming resistance under high-temperature rolling. With lower production cost compared to cold rolled steel, it is widely adopted for structural components, pipe blank, stamping parts and downstream deep processing raw materials. The surface carries natural black iron oxide scale; pickling treatment can be conducted to remove oxide layers for higher surface finish requirements. Products are supplied in original hot coils, leveled sheets, slitted narrow strips and pickled hot rolled coils to satisfy diversified processing demands.
2. Executive Standards
2.1 Chinese National Standards
GB/T 709-2019 Dimensions, shape, mass and tolerances of hot rolled steel plates and strips
GB/T 3274-2017 Ultrasonic testing of hot rolled steel plates and strips
GB/T 700 Carbon structural steel
GB/T 1591 High strength low alloy structural steel
GB/T 13237 Hot rolled pickled steel sheets and strips for cold forming
2.2 International Export Standards
EN 10025 European structural steel standard (S235JR, S355JR)
ASTM A36 / A572 Gr50 American carbon & HSLA structural steel
JIS G3101 General structural hot rolled steel (SS400)
JIS G3131 Hot rolled steel strips for cold forming (SPHC, SPHD, SPHE)
ISO 630 Structural steel hot rolled products
3. Product Classification & Main Grades
3.1 Classification by Material Performance
(1) Ordinary Carbon Structural Hot Rolled Coil
Grades: Q195, Q235B, SS400, S235JR Yield strength ≥235MPa, tensile strength 370–500MPa, elongation ≥26%. Balanced strength and ductility, outstanding weldability and cold bending performance. Mainly used for common steel structures, brackets, civil machinery parts, pipe blanks and cold rolling base stock.
(2) Low Alloy High Strength Hot Rolled Coil
Grades: Q355B (Q345B), S355JR, A572 Gr50 Yield strength ≥355MPa, tensile strength 470–630MPa, excellent room-temperature impact toughness. High bearing capacity and deformation resistance, suitable for heavy-load engineering machinery, bridges, photovoltaic supports, containers and pressure vessel shells.
(3) Cold Forming Stamping Grade Hot Rolled Coil
Grades: SPHC, SPHD, SPHE Low carbon content, low hardness, elongation ≥30%. Superior deep drawing and stamping performance without cracking during bending, flanging and pipe forming. Serves as core raw material for cold rolled coil, galvanized coil and color coated coil.
(4) Special Industrial Hot Rolled Coil
Automotive structural steel: 510L, 610L, S420MC for truck frames and automotive chassis stamping parts
Line pipe steel: L245, L360 for straight seam & spiral welded oil/gas transmission pipes
Weathering steel: Q355NH with Cu/P alloy elements for containers and outdoor anti-corrosion structures
Vessel steel: AH36, DH36 for ship hull and marine structural components
3.2 Classification by Delivery State
As-hot rolled black coil: Directly coiled after finish rolling, with natural oxide scale, lowest cost for rough structural processing
Leveled hot rolled coil: Straightened by temper mill for flat plate surface, suitable for direct cutting and blanking
Pickled hot rolled coil: Acid cleaned to remove oxide scale and oiled, partial replacement of cold rolled sheet for medium surface requirements
Slitted hot rolled strip: Narrow strips cut from master coils for pipe making and small component stamping
4. Main Specification Range
Thickness: 1.2mm ~ 25.4mm, common thickness 2.0mm–12.0mm
Width: 600mm ~ 2000mm, mainstream widths 1000mm / 1250mm / 1500mm
Inner coil diameter: 760mm standard
Single coil weight: 5–25 tons, customizable light coils of 3–8 tons
Length: Unlimited coil length; fixed-length cut sheets available upon customer request
Tolerance: Thickness compliance with Class A precision of GB/T 709; width tolerance controlled within 0~+5mm
Appearance Quality
Original hot rolled coil surface with uniform black oxide scale, no severe pitting, cracks or laminated defects. Coil shape neat without serious tower winding, wave edge or hemming. Pickled coils feature smooth grey metallic surface free of residual oxide and rust spots. All edges free of heavy burrs after slitting.
5. Mechanical Performance Standard Values
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Key Property |
|---|---|---|---|---|
| Q235B / S235JR | ≥235 | 370–500 | ≥26 | General welding & bending |
| Q355B / S355JR | ≥355 | 470–630 | ≥21 | High strength, low temp toughness |
| SPHC | ≥205 | ≥330 | ≥30 | Deep drawing & stamping |
| 510L Automotive steel | ≥355 | 510–650 | ≥24 | High strength auto frame |
All grades pass 180° cold bend test without crack generation; certified impact test at 20℃ for structural grades as required by projects.
6. Complete Production Process Flow
Continuous casting slab incoming inspection → Walking beam furnace uniform heating → High-pressure water primary descaling → Reciprocating rough rolling → Crop & tail cutting → Multi-pass finish rolling → Laminar flow controlled rapid cooling → Hot coiling into master coils → Slow cooling stacking → Finishing processing (leveling / cutting to length / slitting / pickling & oiling) → Full inspection of dimension, surface and mechanical properties → Laser marking grade, spec, heat & batch number → Edge protection + steel strip bundling → Moisture-proof packaging & warehousing
Controlled laminar cooling stabilizes internal metallographic structure to eliminate uneven hardness; slow cooling avoids internal residual stress and plate warpage during subsequent processing.
7. Core Product Advantages
Low comprehensive cost: High-temperature continuous rolling greatly reduces production cost compared with cold rolled materials, ideal for large-volume structural manufacturing
Excellent processing adaptability: Good plasticity allows bending, deep drawing, welding, punching and pipe forming without pre-heating treatment
Complete specification & grade coverage: Full thickness, width and strength series to match civil, machinery, automotive, pipeline and marine industries
Diversified delivery forms: Original coils, flat sheets, narrow strips and pickled coils available to eliminate secondary processing for clients
Stable metallographic structure: Strict heating and cooling control ensures consistent mechanical performance across whole coil without local strength deviation
Wide downstream compatibility: Acts as universal base material for cold rolling, galvanizing, color coating, spiral pipe and straight seam pipe production
8. Main Application Fields
Steel Structure Construction: Factory steel beams, columns, purlins, building brackets, bridge components, photovoltaic support frames
Pipe Manufacturing Industry: Raw blanks for straight seam welded pipe, spiral submerged arc welded pipe, fluid delivery steel pipes
Machinery & Engineering Equipment: Excavator loader structural parts, gear boxes, jack shells, mechanical base frames
Automotive Manufacturing: Truck chassis cross beams, wheel hubs, container bodies, heavy vehicle structural stamping parts
Cold Rolling & Coating Base Material: Primary raw material for cold rolled coil, hot-dip galvanized coil, prepainted color steel coil
Pressure Vessel & Storage Tank: Low & medium pressure tank shells, gas cylinder blank materials
Shipbuilding & Offshore: Marine hull plates, deck structures, offshore platform supporting components
General Hardware & Civil Products: Stamping accessories, guardrails, agricultural machinery parts, waste incineration equipment
9. Processing, Storage & Operation Specifications
Cutting, bending and welding operations can be carried out directly on hot rolled coils without heating; pickled coils are recommended for exposed finished parts to avoid oxide shedding.
Coils shall be stored in dry covered warehouses; long-term outdoor stacking requires waterproof tarpaulin wrapping to prevent surface rust expansion.
Slitting processing needs proper clearance between cutting knives to avoid edge burrs which may cause crack initiation during subsequent bending.
High-strength low-alloy coils for pressure vessels must undergo third-party ultrasonic flaw detection before formal fabrication.
When used for deep drawing stamping, SPHD/SPHE deep drawing grades shall be selected to prevent surface cracking under large deformation.
Coil lifting requires dedicated C-type lifting clamps; steel wire slings directly contacting coil edges are prohibited to avoid edge deformation and damage.
10. Packaging, Inspection Documents & Customization Services
10.1 Export Standard Packaging
Each coil wrapped with inner moisture-proof kraft paper and outer galvanized steel protective sheet; coil edges fitted with plastic anti-collision guard rings. Multiple steel straps radially and circumferentially fasten the coil to prevent loose winding during sea transportation. Each coil marked with grade, thickness, width, coil weight, executive standard, heat number and batch number for full traceability. Light small coils can be packed into wooden frames upon request.
10.2 Full Set Factory Certification Documents
Original delivery documents supplied together with goods: chemical composition report, mechanical property test certificate, dimensional inspection sheet, ultrasonic testing report and factory qualification certificate. Third-party inspection by SGS, BV and TÜV is available to satisfy domestic project acceptance and overseas export customs clearance requirements.
10.3 Customization Support
Custom non-standard thickness & width, light-weight small coils, arbitrary fixed-length cutting, narrow slitting, pickling & oiling surface treatment; provide full material certificates compliant with GB, EN, ASTM, JIS standards for global steel distributors and manufacturing factories.
Send Inquiry to This Supplier
You May Also Like
-
Steel Sheet & Plate & Boiler Steel Plate，P265GH、P355NH、16Mo3、13CrMo4-5、10CrMo9-10NegotiableMOQ: 5 Metric Tons
-
Steel Sheet & Plate & Steel Sheet Pile，S275GP、S355GP、S390GP、S430GPNegotiableMOQ: 5 Metric Tons
-
Steel Rebar & Deformed Steel Bar / Rebar，HRBF400、HRBF400E、HRBF500、HRBF500ENegotiableMOQ: 5 Metric Tons
-
Steel Wire & Galvanized Steel Wire，Q195、Q235、60、65、70、72A、40Cr、30CrMnSiNegotiableMOQ: 5 Metric Tons
-
Flat Steel & Steel Flat Bar，10#、20#、35#、45#、40Cr、42CrMo、20CrMnTiNegotiableMOQ: 5 Metric Tons
-
Steel Angle & Angle Bar，Q235B、A36、SS400、S235JR、45#、40Cr、65MnNegotiableMOQ: 5 Metric Tons
-
H Section Steel & H Beam，Q235A、Q235B、Q235C、Q235D、Q355B/C/D/E、Q390、Q420、Q460、Q235NH、Q355NH、Q345GNHNegotiableMOQ: 5 Metric Tons
-
Steel Pipe & Tube & ERW Galvanized Pipe，Q195、Q215B、Q235A、Q235B、Q275B、SPHC、Q355B、Q355C、27SiMnNegotiableMOQ: 5 Metric Tons
-
Steel Pipe & Tube & Alloy Seamless Steel Pipe，15CrMo、12Cr1MoVG、12Cr2Mo1、1Cr5Mo、27SiMn、Q355B、16Mn、X52、X60、X65NegotiableMOQ: 5 Metric Tons
-
Steel Pipe & Tube & OCTG Oil Pipe，Gr.B、X42、X52、J55、N80、L80、P110、X42/X52/X60/X70/X80NegotiableMOQ: 5 Metric Tons
