China Hot Rolled Steel Strips in Coil Manufacturers Suppliers Factory - Made in China

Hot Rolled Steel Strips in Coil for Tube Making and Roll Forming

Black and pickled and oiled (P and O) hot rolled steel strips manufactured to ASTM A1011, EN 10025, and JIS G3131 standards. Supplied in narrow and wide slit configurations with mill or slit edges, our hot rolled strip coils provide stable yield strength, controlled strip camber, and tight thickness tolerances for ERW pipe welding, structural profile cold forming, and hardware stamping.

Hot Rolled Steel Sheet in Coil
Name: Hot Rolled Steel Sheet in Coil . Standard: ASTM A36 / ASTM A1011 / EN 10025 / JIS G3101 . Thickness: 1.5-20mm . Width: 800-2000mm . Coil Weight: Customized . Delivery Time: 15-30 days . MOQ: 1

view more
Steel Tube Pipe Price
Name: Steel Tube Pipe Price. Outer Diameter: 6mm – 1500mm (Seamless & Welded Options). Wall Thickness: 0.5mm – 80mm (Custom Tolerances Available). Length: 3m – 12m or Cut-to-Length as Per Drawing.

view more
Steel Coil Export Shipment Container
Name: Steel Coil Export Shipment Container. Material: Carbon Steel / Stainless Steel / Galvanized Steel / PPGI. Thickness: 0.12-25mm. Width: 600-2000mm. Coil Weight: 1-10 Tons. Packaging: Standard

view more
Stainless Steel Hot Rolled Plate
Name: Stainless Steel Hot Rolled Plate. Thickness: 0.3-100mm. Width： 500-3000mm. Delivery Time： 7-30days.

view more
Custom Stainless Steel Plates
Name: Custom Stainless Steel Plates. Thickness: 0.3-100mm. Width： 500-3000mm. Delivery Time： 7-30days.

view more
Coil Stainless
Name: Coil Stainless . Standard: ASTM A480 / EN 10051 / JIS G4305. Thickness: 0.3-3.0mm. Length: Customized. Delivery Time: 7-30days. MOQ: 1 mt.

view more
Hot Rolled Stainless Steel Coil
Name: Hot Rolled Stainless Steel Coil . Standard: ASTM A240 / EN10088 / GB/T 3280. Thickness: 0.3-5.0mm. Length: Customized. Delivery Time: 7-30days. MOQ: 1 mt.

view more
Stainless Steel Coil Stock
Name: Stainless Steel Coil Stock . Standard: ASTM A240/A480, EN 10088. Thickness: 0.3-6.0mm. Length: Customized. Delivery Time: 7-30days. MOQ: 1 mt.

view more
Hot Rolled Carbon Steel Coil
Name: Hot Rolled Carbon Steel Coil . Standard: GB-T/ASTM/EN 10025. Thickness: 0.5-20mm. Length: Customized. Delivery Time: 7-30days. MOQ: 5 mt.

view more
Carbon Steel Tube
Name: Carbon Steel Tube . Standard: EN 10210/10217. Thickness: 1.5-60mm. Length Customized. MOQ: 5 mt . Delivery Time: 7-30days.

view more
Rolled Coil Steel
Name: Rolled Coil Steel . Standard: GB-T/ASTM/EN 10025. Thickness: 0.5-20mm. Length Customized. Delivery Time: 7-30days. MOQ: 5mt.

view more
Steel Coil Roll
Name: Steel Coil Roll . Standard: GB-T/ASTM/EN 10025. Thickness: 0.5-20mm. Length: Customized. Delivery Time: 7-30days. MOQ: 5mt.

view more

First 12 Last

Product Categories

Black Hot Rolled Strips (As-Rolled):

Standard hot-rolled strip with natural iron oxide scale, suitable for heavy structural framing, scaffolding pipes, and general welding.

Pickled and Oiled Hot Rolled Strips (P and O):

Acid-pickled strip with a light rust-inhibitive oil film, removing surface scale for direct stamping, painting, or laser cutting without secondary surface preparation.

Mill Edge Strips:

As-rolled original edges for applications where edge appearance is non-critical or will be trimmed during inline tube forming.

Slit Edge Strips:

Precision-slotted custom widths with tight lateral tolerances for immediate feed into automatic stamping presses and roll-forming machinery.

Technical Specifications

Parameter	Capability / Standard Range	ASTM Benchmark	EN Benchmark
Thickness Range	1.2 mm - 12.0 mm (+/-0.03 mm to +/-0.08 mm tolerance)	ASTM A1011	EN 10051
Width Range	30 mm - 685 mm (Slit width tolerance +/-0.2 mm)	ASTM A568	EN 10048
Coil Inner Diameter (ID)	508 mm (20 in) / 610 mm (24 in)	Standard Industry ID	Standard Industry ID
Coil Outer Diameter (OD)	900 mm - 1600 mm	Customer spec	Customer spec
Coil Weight	1.0 MT - 8.0 MT per coil (customizable)	Customer spec	Customer spec
Camber (Sickle Bend)	le 2.0 mm per 2000 mm length	ASTM A568	EN 10051
Surface Condition	Black As-Rolled, Pickled and Oiled (P and O)	ASTM A1011	EN 10111
Edge Condition	Mill Edge (Q/B), Slit Edge (Cut)	ASTM A568	EN 10048

Steel Grades and Mechanical Properties

Commercial and Stamping Grades
• ASTM A1011: CS Type A, CS Type B, DS Type A, DS Type B (Drawing quality)
• EN 10111: DD11, DD12, DD13 (Cold forming and deep stamping)
• JIS G3131: SPHC, SPHD, SPHE (Commercial and stamping applications)

Structural and High-Yield Grades
• ASTM A1011 SS: Grade 33 (230 MPa), Grade 40 (275 MPa), Grade 50 (340 MPa)
• EN 10025-2: S235JR, S275JR, S355JR / S355J2 (High-strength structural members)
• GB/T Standards: Q195, Q235B, Q355B (ERW tube welding baseline)

Manufacturing and Processing Capabilities

Production lines integrate continuous strip rolling, inline gamma-ray thickness measurement, automatic hydraulic automatic gauge control (AGC), and high-precision slitting units.

Hot Rolling and Finishing Line:

Continuous rolling ensures consistent thermal history, resulting in uniform grain structure and balanced mechanical properties across the coil length.

Inline Gamma-Ray Thickness Gauge:

Automated AGC systems adjust roll gaps continuously to keep thickness variation within +/-0.03 mm on light-gauge strip.

Continuous Acid Pickling Line:

Hydrochloric acid bath removes iron scale completely, followed by electrostatic oil coating for uniform corrosion protection on P and O strip.

High-Precision Slitting Units:

Rotary carbide shears accommodate strip widths down to 30 mm, maintaining edge burr height below 7% of material thickness to prevent die wear and welding seam defects.

Quality Control and Compliance Standards

Every production heat is sampled, tested, and tracked. Mill Test Certificates (MTC) matching EN 10204 3.1 are issued with every shipment.

Chemical Analysis:

Optical Emission Spectrometry (OES) verification for C, Si, Mn, P, S, and micro-alloying elements to ensure weldability.

Mechanical Testing:

Tensile strength, yield point, and percentage elongation testing according to ISO 6892-1 / ASTM A370.

Dimensional Inspection:

Laser micrometer tracking for width, thickness profile, and strip flatness (wave height le 4 mm/m).

Camber and Edge Inspection:

Manual and optical verification ensuring strip camber remains within 2.0 mm per 2-meter gauge length for uninhibited roll-forming feed.

Target Applications

ERW Tube and Pipe Manufacturing:

Round, square, and rectangular structural steel pipes, water pipes, and scaffolding tubes.

Roll-Formed Profiles:

C-channels, U-channels, Z-purlins, highway guardrails, and door frame sections.

Stamping and Hardware:

Caster brackets, hinges, automotive brackets, electrical junction boxes, and industrial chain plates.

Cold Rolling Substrates:

Raw feedstock for cold-rolling re-reducers and narrow cold-rolled strip producers.

MOQ and Lead Time

Minimum Order Quantity (MOQ):
Standard Grades and Sizes (e.g., Q235B / S235JR, 2.0mm - 4.0mm x 100mm - 300mm): 25 Metric Tons (1x20ft Container).
Special High-Strength Grades or P and O Material (e.g., S355JR / DD11): 50 Metric Tons.

Production Lead Time:
• Standard mill inventory widths: 7-10 days.
• Custom slitting and specialized grade runs: 15-20 days from deposit or L/C confirmation.

Export Packaging and Transport Safety

Protective Coating:

Pickled and Oiled (P and O) coils receive neutral anti-rust oil (1.5 - 2.5 g/sqm). Black coils are dry-treated with edge rust inhibitor.

Inner Wrap:

Moisture-proof plastic film and VCI anti-corrosion paper.

Outer Binding:

Steel inner and outer corner protectors, galvanized steel circumferential wrapping sheets.

Strapping:

Minimum 3 radial steel straps through the eye and 3 circumferential steel straps around the OD.

Container Loading:

Coils loaded eye-to-sky or eye-to-wall on reinforced wooden skids, secured with high-tensile steel strapping and timber bracing inside 20ft heavy-tested containers (max load 27-28 MT per container).

FAQ

Q: How do you control camber (sickle bend) on narrow slit steel strips?

A: Camber is controlled during both primary rolling and precision slitting. Tension-controlled slitting arbor shafts eliminate side drift, maintaining strip camber within le 2.0 mm per 2000 mm length to prevent jam-ups in automated continuous roll-forming machines.

Q: What is the main difference between black hot-rolled and pickled and oiled (P and O) steel strips?

A: Black hot-rolled strip retains its thermal oxide scale, making it cost-effective for general structural welding where scale is acceptable. P and O strip undergoes acid pickling to remove scale and is coated with rust-inhibitive oil, offering a clean surface ready for precision stamping, direct painting, or powder coating.

Q: Can your hot-rolled steel strip be welded directly in high-speed ERW pipe mills?

A: Yes. Chemistry is tightly controlled with carbon equivalents (CEV) kept low to ensure excellent weldability without pre-heating. Edge burrs on slit strip are maintained under 7% of thickness, minimizing edge defects during high-frequency induction welding.

Q: Do you supply Mill Test Certificates (MTC) with chemical composition and mechanical test data?

A: Every shipment includes an original EN 10204 3.1 MTC specifying the exact heat number, chemical ladle analysis, yield strength, tensile strength, elongation, and measured dimensional tolerances.

Q: What thickness tolerances can your hot strip mill maintain?

A: Standard thickness tolerance complies with EN 10051 / ASTM A568 (typically +/-0.04 mm to +/-0.08 mm depending on gauge). Premium tolerance lines utilizing automatic gauge control (AGC) can maintain +/-0.03 mm on select gauges.

Q: What coil weight and ID dimensions are available for automated uncoiler machinery?

A: Standard inner diameters are 508 mm (20 in) and 610 mm (24 in). Coil weights range from 1.0 MT up to 8.0 MT per coil to accommodate your crane capacity and decoiler mandrel limits.

Request a Technical Quote and Material Sample

Send us your required steel grade, thickness, strip width, edge type, surface condition, and target tonnage. Our metallurgical engineering team will evaluate mill limits and deliver a detailed price quotation within 12 hours.
Email: info@tjrsr.com
WhatsApp / Direct Line: +86 15900235505
Factory Location: Tianjin Steel Industrial Zone, China
Required Quote Details: Grade (e.g., S235JR / SPHC) | Dimensions (Thickness x Width) | Edge Type (Mill or Slit) | Surface (Black or P and O) | Quantity (MT) | Destination Port

As one of the most professional hot rolled steel strips in coil manufacturers and suppliers in China, we also support customized service. Please feel free to wholesale cheap hot rolled steel strips in coil in stock here from our factory. For price consultation, contact us.

Hot Rolled Carbon Steel Coil, hot rolled steel strips in coil, Hot Rolled Stainless Steel Coil