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PRODUCT DESCRIPTION
If your line depends on rhythm—feed, form, weld, repeat—A36 carbon steel coils keep that rhythm steady. The coil unwinds with a firm, even tension; edges are clean; thickness tracks true. On hot-rolled stock you can feel the subtle mill scale—tough, workmanlike—while cold-rolled runs smooth under the glove, ready for precise bends and crisp visual parts. Because A36 is mild, welders get predictable puddles and low spatter; fabricators see fewer split edges and less rework. For high-volume roll-forming, the continuous feed reduces panel seams and off-cut loss. For plate work, coils slit and leveled to sheets help you match nest patterns to your parts, lowering cost per piece without compromising structural integrity.
| Attribute | Option/Value |
|---|---|
| Width | 5 mm–1500 mm |
| Thickness | Hot-rolled: 2.75–100 mm; Cold-rolled: 0.2–3.0 mm |
| Standards | AISI / ASTM / JIS / SUS / DIN / GB |
| Grades | ASTM A36; Q235; EN S235J2; 1.0117; 17G1S; 40EE |
| Technique | Hot Rolled & Cold Rolled |
| Surface | Bare, Black, Oiled, Shot Blasted, Spray Paint, Coated, Galvanized |
| Coil ID | 508–610 mm |
| MOQ | 5 tons |
| Coil Weight | 2–20 tons |
| Monthly Capacity | 30,000 tons |
| Typical Applications | Construction, machinery, containers, shipbuilding, bridges |
| Chemistry (A36) | C ≤ 0.25%; Si 0.15–0.40%; Mn 0.85–1.35%; S ≤ 0.005%; P ≤ 0.04% |
| Mechanical (typical) | YS ≥ 250 MPa; TS 400–550 MPa; Elongation ≥ 20% |
A36 coils are chosen not just for “meeting spec,” but for how they reduce total cost per finished part. Below, we translate metallurgical characteristics into line-level outcomes your team will notice on the shop floor and in the P\&L:
Consistent yield strength and gauge tracking stabilize press windows; fewer trial hits and tool shims.
Predictable springback improves first-pass bend accuracy, minimizing re-form cycles.
Mild chemistry supports stable arcs and clean puddles; operators spend less time grinding spatter and dressing beads.
Compatible with common wires and gas mixes, streamlining consumable procurement.
Cold-rolled options handle tight radii without orange peel; hot-rolled delivers sturdy sections for brackets and frames.
Smooth running on decoilers: the sound you want is a steady hum, not chatter from camber or tight spots.
Coil weights from 2 to 20 tons let you right-size batches and reduce remnants.
Mix of widths via slit mults matches your BOM, improving material utilization.
From astm a36 black iron coils (as-rolled) to galvanized and coated, select the finish that fits either immediate paint or extended storage.
A concise decision layer for engineers and buyers translating drawings into coil orders:
Hot-rolled 2.75–100 mm: robust sections, base plates, channels, heavy formed components.
Cold-rolled 0.2–3.0 mm: precise stampings, brackets, enclosures requiring tight tolerance and smooth feel.
Widths up to 1500 mm accommodate wide panel profiles and efficient nesting.
508–610 mm ID fits most line mandrels; OD targeted to safe lifting with your cranes/forklifts.
Coil weight 2–20 tons keeps handling ergonomic and maintains line uptime between swaps.
Bare/Black for cost-sensitive structural parts; oiled to mitigate flash rust during transit/storage.
Shot-blasted or spray-painted to move directly to assembly; coated/galvanized for outdoor or corrosive settings.
Mill edge for economy; slit edge for precise width callouts, lower burr, and simplified hemming.
Deburr options and protective films available for cosmetic parts.
Transform coils into line-ready inputs, with documentation at every step so your auditors—and your operators—can trust the flow:
Yield plans tailored to your width list; we target minimal skeleton and offer alternative mults when design changes arise.
Tight slit-width control supports roll-formed profiles and laser nests with minimal edge prep.
Sheet and blank formats for laser/turret cells; flatness, camber, and diagonal checks recorded on tally sheets.
Packaged by part family for quick kitting.
Process windows aligned to A36 behavior to protect corner integrity on small radii.
Optional surface films or primer coats for parts advancing straight to assembly.
Recommendations on HR vs CR selection, bend radii, and coating stacks based on your downstream processes.
PPAP-style documentation available for new program launches.
For buyers managing regulated or audited programs, we make quality visible and portable:
Heat-specific chemistry and mechanicals; retained samples by lot for retrospective checks.
Cross-reference sheets available for A36/Q235/S235 families to help global teams speak the same language.
Dimensional checks (gauge, width, coil runout), tensile sampling, and bend tests per project requirements.
Third-party witnessing (SGS/BV/etc.) on request.
Bundle-level barcodes mapping heat, size, surface, and slit program; scan data accessible for ERP tie-in.
Non-conformance handling with root-cause and corrective actions documented for continuous improvement.
Packaging designed for re-use where possible; oiling volumes optimized to reduce VOCs without compromising protection.
Translate coil characteristics into use-case wins. Typical outcomes our customers report:
Base plates, stiffeners, and frames with reliable yield assumptions; accurate hole patterns after leveling.
A36 coils feed roll-formed purlins with smooth edges for consistent bolt seating.
Cross-members and rails benefit from stable weldability; fewer reworks in jig.
Cold-rolled for cosmetic panels; hot-rolled for brackets taking abuse on farm implements.
Precise slit widths reduce shim packs and improve assembly takt.
Oiled surfaces cut flash-rust risk during overseas transit.
With proper coating, hot-rolled A36 serves brackets, guards, and housings; shot-blasted/spray-painted options simplify finishing.
A quick tool for specifying the right route without over-engineering:
| Attribute | Hot-Rolled (HR) | Cold-Rolled (CR) | Pickled & Oiled (P\&O) |
|---|---|---|---|
| Gauge Control | Standard | Tight | HR with scale removed |
| Surface | As-rolled/black | Smooth, bright | Cleaned for paint |
| Best For | Heavier gages, structural parts | Precision bends, visible panels | Paint-ready without CR premium |
| Typical Benefit | Lower cost per kg | Reduced finishing, sharper bends | Better adhesion, faster paint lines |
Rule of thumb: if your quality plan flags cosmetic risk or tight radii, start with CR. For rugged parts and budget priority, HR wins. When paint adhesion is the sticking point, P\&O is a smart middle path.
Global sourcing often means mixed drawings and specs. We help your team align language and expectation:
ASTM/SAE (US): A36 (structural quality).
GB (China): Q235 family (consult us for precise sub-grade matching vs yield/impact requirements).
EN (Europe): S235 series (e.g., S235J2 / 1.0117).
Other regional markers: 17G1S, 40EE, etc.
Advisory: while many projects treat these as functional equivalents, final acceptance should refer to your governing code and project spec; we can provide side-by-side tables and witness tests where necessary.
Protect the coil, protect your throughput—because a dented edge or flash-rusted face costs far more than packaging:
Water-resistant wraps, edge guards, steel strap banding; desiccants and interleaves based on transit duration.
Markings on ID/OD list heat number, size, surface, weight, and PO for fast receiving.
Lift point guidance and coil clamp specs available; balanced weights reduce saddle failure risks.
Optional skid/pallet solutions for small-format coils feeding press lines.
Combination loads of HR/CR, different widths and gages; consolidation minimizes landed cost.
MOQ 5 T supports prototypes and phased launches; 30,000 T/month capacity protects major ramps.
Flexible INCOTERMS; documentation bundles aligned to customs and quality audits.
For repeat programs, we can implement safety stock or VMI to buffer seasonality.
Selecting an a36 steel coils supplier is ultimately about risk management—technical, schedule, and financial. Here’s how we de-risk your program:
We tune coil geometry, slit accuracy, and packaging for your line constraints, not just catalogue numbers.
Consistent mechanicals reduce downtime from tool re-sets and weld re-qualifications.
From 0.2 mm CR to 100 mm HR under one framework of documentation, labeling, and QA checkpoints.
Surface portfolio from astm a36 black iron coils to galvanized/coated ensures one supplier for multiple use cases.
30,000 tons/month provides headroom; 5-ton MOQs keep cash and space under control during early builds.
Expedite options and consolidation loads to improve on-time-in-full performance.
Heat-to-bundle traceability, retained samples, and optional third-party witnessing make audits straightforward.
Digital copies of MTCs, slit tallies, and inspection reports integrate into your ERP or PPAP packages.
Absolutely. Send your BOM or width program; we’ll return a yield plan and slit schedule, including suggested mults to minimize skeleton waste. Mill or slit edge per part requirement, with optional deburr for cosmetic assemblies.
Start from your tightest bend radius and most visible surface. Use CR where tolerance and finish drive quality; use HR where thickness and cost dominate; choose P\&O when paint adhesion matters but CR isn’t necessary. Our team will map parts to material routes and quantify cost/benefit.
Standard pack: MTC (chemistry and mechanicals) by heat, slit tally, packing list, and labeled bundles with bar-coded IDs. Third-party inspection reports available on request.
During cut-to-length and leveling, we record camber/diagonal targets and keep retained samples per lot. Feedback loops from your first runs are folded into subsequent settings to maintain stability.
Yes. A36’s mild chemistry supports common processes (GMAW, FCAW, SMAW). We can share typical parameter windows and address spatter/heat-input concerns for your joint design.
Choose oiled or galvanized/coated finishes; add VCI papers and desiccants for long voyages or humid storage. We’ll recommend packaging stacks matched to your route and dwell time.
Yes. With a36 coils across multiple surfaces and gages, we stage capacity and, if needed, set safety stock or VMI. This reduces expedites and smooths your cash cycle.
Zhongjing Steel Group (Guangdong) Co.,Ltd. specializes in the production of cold-rolled/hot-rolled coils, carbon steel pipes, bars, and PPGI materials. It is a modern enterprise integrating carbon steel production, processing, and trade. It is a Chinese iron and steel enterprise group.
