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A36/Q235/S235JR mild steel hot-rolled plate engineered for reliable forming, welding, and repetitive fabrication cycles.
Global standards coverage (ASTM/EN/GB) to simplify cross-border projects and code compliance.
Wide stockable thickness and width envelope to reduce changeovers and off-cut scrap.
Clean surfaces (black/oiled/shot-blasted) for faster paint adhesion and consistent weld pools.
Backed by mill test certificates and optional third-party inspection for full traceability.
Trusted by contractors and OEMs seeking a stable, cost-effective structural plate.
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ASTM A36
Product Description
In hand, hot-rolled mild steel feels solid and slightly textured—the dark mill scale gives a matte, low-glare finish that hides fingerprints and shop scuffs. As it lands on your table, you hear the reassuring dull ring of a plate with even mass and consistent grain. When you strike an arc, the puddle settles predictably; the plate accepts fillet or groove welds without drama. If you’re forming, the resistance is smooth rather than jerky, so bends track your tooling and springback stays within expectation. Painted or galvanized, the surface takes on a calmer sheen, turning a workpiece into a durable component. This is the kind of plate that keeps production lines moving—no last-minute substitutions, no decoding of mismatched standards—just a structural mild steel that behaves the way your procedures expect.
Dimensions & Standards
| Item | Range / Spec |
|---|---|
| Grades | ASTM A36 / GB Q235 / EN S235JR |
| Thickness (HR) | 2.75–100 mm |
| Thickness (CR) | 0.20–3.00 mm |
| Width | 45–2200 mm |
| Length | Custom (cut-to-size available) |
| Standards Supported | AISI, ASTM, ASME, DIN, BS, EN, ISO, JIS, GOST, SAE |
| Delivery Conditions | As-rolled, annealed, quenched & tempered (as specified) |
| Surface Options | Black (mill), oiled, shot-blasted, spray-painted, coated, galvanized |
Typical A36 Reference Data (for RFQ baselining; confirm via MTC)
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 400–550 MPa | 58–80 ksi |
| Yield Strength | ≈250 MPa | 36 ksi |
| Elongation (200/50 mm) | 20–23% | 20–23% |
| Elastic Modulus | 200 GPa | 29,000 ksi |
| Density | 7.85 g/cm³ | 7.85 g/cm³ |
Typical Chemical (A36 target window)
C 0.25–0.29%, Mn ~1.0%, Si ~0.28%, P ≤0.040%, S ≤0.050%, Cu ≥0.20% (if specified).
Note: Actual heats vary by thickness and route; supply is accompanied by EN 10204 3.1 MTC upon request.
Productivity you can feel: predictable weld pools and steady bend response reduce rework and operator “fighting,” cutting hidden labor cost.
Cross-standard clarity: A36/Q235/S235JR coverage removes spec guesswork on multi-region projects and simplifies approvals.
Scrap minimization: broad width and thickness ranges enable tighter nesting and fewer off-cuts on profile jobs.
Finish-ready surfaces: black/oiled for storage, shot-blasted or coated when you need clean adhesion without extra prep.
Traceability built-in: heat numbers, MTCs, and optional third-party inspection keep auditors and EPC clients comfortable.
Thickness range supports both sheet-metal forming and heavy fixture plates, with common stock points between 3–50 mm for fast turns.
Widths up to 2200 mm allow larger one-piece blanks—fewer seams, fewer distortion risks after welding.
Lengths are cut-to-size to your nesting plan; beveling, edge conditioning, and corner radiusing available.
Flatness and dimensional tolerances align with common HR plate practices; precision flatness available on request for laser bed stability.
Gauge and size conversion support is available at quotation to align with your BOM conventions.
Each lot is produced and tested to the applicable standard (ASTM A36, GB/T 700 Q235, EN 10025-2 S235JR), with tensile, yield, elongation, and chemistry reported on the MTC.
For cold-service or impact-sensitive uses, specify sub-grades (e.g., Q235C/D or S235JR with impact requirements) and we’ll align test temperature and CVN energy accordingly.
If your process is heat-input-sensitive (robotic GMAW, SAW), consistent sulfur/phosphorus limits and deoxidation practice help stabilize bead appearance and reduce porosity risk.
Surface states: black (mill scale) for structural use; oiled for storage; shot-blasted for paint-ready lines; factory priming, zinc coating, or galvanizing if you need immediate corrosion protection.
In-house services: plasma/laser cutting, oxy-fuel beveling, CNC drilling, tapping, bending, decoiling (for sheet/coil), and punching.
Weldability: suitable for SMAW/GMAW/FCAW; typical A36/Q235/S235JR procedures require no preheat at moderate thickness; we can share WPS guidance at RFQ.
Edge quality options: mill, trimmed, or slit edges depending on downstream safety and fit-up requirements.
Quality system aligned to ISO; MTC EN 10204 3.1 supplied with each order; heat/lot traceability retained from mill to dispatch.
Third-party inspection support (SGS/BV/TÜV) on request.
Conformance to regional codes: AISC/GB/Eurocode contexts are supported with grade equivalency guidance; CE considerations for EU projects can be addressed via documentation pack.
Environmental and safety: standard seaworthy packing minimizes rust and handling damage; SDS available for coated/primed product.
Packing: strapped bundles with waterproof paper and edge protection; export crating on request.
Ports: Tianjin, Shanghai, Qingdao are typical routes; other ports available based on schedule.
Lead times: stock sizes ship quickly; processed/cut-to-size lead times scale with tonnage and service mix; partials and staged deliveries supported for project roll-outs.
Payment & trade: T/T, L/C; project terms and INCOTERMS confirmed at PO.
Buildings & bridges: base plates, gussets, stiffeners that weld cleanly and align as modeled.
Equipment & transport: frames, pedestals, crane components where predictable forming and drilling matter.
Tanks & general fabrication: floor plates, saddles, skirts; shot-blasted options speed coating lines.
OEM components: jigs, fixtures, brackets—low variability reduces changeovers and programming tweaks.
One-stop coverage across ASTM A36, Q235, and S235JR simplifies your vendor list and reduces spec risk on multinational supply.
Real fabrication support—cutting, bending, drilling, beveling—means you receive parts closer to “ready to assemble,” shortening your critical path.
Documentation that satisfies EPCs and auditors: 3.1 MTCs, inspection records, and packing lists aligned to your project work-packs.
Consistent surfaces and chemistry reduce weld defects and paint rework, protecting your margins on tight bids.
Q1: How do A36, Q235, and S235JR compare?
They sit in the same “mild structural” class with similar yield strength (about 235–250 MPa). Selection typically follows local code or client specification; we can propose equivalents when substitutions are allowed.
Q2: Can you guarantee MTCs and third-party inspections?
Yes. Each shipment ships with a 3.1 MTC; SGS/BV/TÜV witnessing can be arranged.
Q3: What about flatness for laser cutting?
Standard HR tolerances are fine for most plasma/oxy jobs. For lasers or large blanks, request precision flatness or shot-blasted/leveled supply.
Q4: Will the “black” mill surface affect painting?
For critical coatings, choose shot-blasted or factory-primed supply; otherwise, black/oiled stock is suitable after normal prep (degrease, light blast/brush).
Q5: Minimum order quantity and lead time?
Standard MOQ is project-dependent; stock sizes can ship quickly while processed parts scale with tonnage and service mix. We confirm dates at quotation.
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.
