Description
Mill-Direct Hot Rolled Plate Supply — SS400, Q235, and A36 plates rolled in-house, then cut, welded, and bent under one roof before shipping.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | SS400/Q235/A36 Hot Rolled Carbon Steel Plate |
| Product Type | Steel Plate |
| Steel Grade | SS400, Q235, A36 |
| Standard | ASTM, JIS (SS400), GB (Q235) |
| Thickness | 6 mm |
| Width | 1500 mm |
| Length | 6000 mm |
| Technique | Hot Rolled |
| Surface Treatment | Hot Rolled (Black) |
| Process Capability | Welding, Cutting, Bending |
| Application | Shipbuilding / Structural fabrication / Industrial construction / Welding & cutting processing |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Shipbuilding & Marine | Hull plating, deck panels, bulkhead stiffeners for cargo and work vessels |
| Industrial Construction | Equipment platforms, pipe rack base plates, mezzanine flooring for factories and warehouses |
| Infrastructure & EPC | Bridge gusset plates, foundation anchor base plates, connection brackets for structural frames |
| General Steel Fabrication | Columns, beams, brackets, and stair treads processed to shop drawings |
Why Third-Party Traders Fail on Material Traceability for SS400 Q235 A36 Hot Rolled Carbon Steel Plate
When the mill certificate does not match the heat number stamped on the plate, customs holds the container and the project stalls.
Overseas EPC buyers ordering a SS400 Q235 A36 hot rolled carbon steel plate supplier from a trading company often discover — only at site inspection — that the MTC references a different batch, or that the plates were sub-sourced from a mill the trader never disclosed. The result is re-inspection costs, delayed clearance, and in worst cases, outright rejection by the supervising engineer. [NEED_CITE: material traceability requirements under EN 10204 inspection documents]
Matching 6 mm Hot Rolled Plate to Structural and Marine Fabrication
A 6 mm thickness sits at the practical lower limit for load-bearing structural work — thick enough to accept full-penetration welding without burn-through risk, yet light enough to keep overall frame weight manageable for platforms, bracing, and secondary members. The 1500 × 6000 mm sheet size aligns with standard CNC nesting layouts, reducing scrap when cutting gussets, base plates, and stiffeners. Our in-house fabrication line handles plasma cutting, drilling, and bending directly after rolling, so the SS400 Q235 A36 hot rolled carbon steel plate supplier chain stays under a single quality system from slab to finished component.
Engineering Compliance and Surface Treatment Selection
Hot rolled black surface is the standard delivery condition for plates destined for further fabrication — welding, shot blasting, and primer painting happen at the fabrication stage, not the mill. For projects targeting EU markets, the equivalent S235JR grade under EN 10025 must be confirmed against Q235B or A36 chemical composition before shop drawing sign-off, since minor differences in manganese and carbon content affect weldability. [NEED_CITE: steel grade equivalence between JIS, GB, and ASTM systems] Third-party inspection by SGS or BV can be arranged for dimensional verification and coating thickness before loading, ensuring the documentation package satisfies both the main contractor and the project engineer.
Understanding SS400, Q235, and A36 Across Three Standard Systems
These three grades represent the same structural category — mild carbon steel for general fabrication — but originate from different national standards. SS400 under JIS G 3101 specifies a minimum tensile strength range without mandating chemical composition limits beyond carbon and manganese. Q235 under GB/T 700 defines yield strength as the primary classification criterion, with sub-grades A through D reflecting increasing impact toughness requirements. A36 under ASTM A36/A36M sets both yield and tensile minimums and is the default specification for North American structural and bridge work. The hot rolling process produces a mill scale surface that must be removed by shot blasting before any protective coating is applied — skipping this step leads to premature coating adhesion failure in marine or humid industrial environments.
The Hidden Cost of Unverified 6 mm Plate on a Fabrication Order
Ordering hot rolled plate from a supplier who cannot provide heat-level traceability creates a cascade of failures: dimensional checks reveal negative tolerance beyond the allowable standard, welding procedure qualification fails because the actual carbon equivalent differs from the MTC, and the inspector rejects the entire batch at the fabrication stage. Re-sourcing the material means paying twice for freight, delaying the project schedule, and potentially redesigning connections if the replacement plate arrives in a different width or length. [NEED_CITE: consequences of material non-conformance in structural steel fabrication per AISC and EN 1090]
Why Fabricators Choose Our Integrated Mill and Workshop
We operate both the steel production facility and the fabrication workshop — the same team that rolls the plate also cuts, welds, and assembles it. This eliminates the gap between material supplier and fabricator that causes most traceability disputes. Our own mill produces over 2,800 specifications of raw material, and the fabrication division holds certified welding procedures (WPS/PQR) with AWS and EN qualified welders. Every order ships with a complete documentation package: mill test certificates linked to heat numbers, weld maps, dimensional inspection reports, and coating thickness records. Professional loading plans are prepared for every container, with internal bracing designed specifically for plate bundles to prevent edge deformation during ocean transit.
Documentation & Compliance
- Mill test certificate documenting SS400, Q235, or A36 chemical composition and mechanical properties per JIS G 3101, GB/T 700, or ASTM A36, with heat number traceability
- Third-party inspection report from SGS, BV, or TÜV covering dimensional accuracy, surface condition, and coating thickness as specified in the purchase order
- Welding procedure specification (WPS) and procedure qualification record (PQR) for any shop welding performed on the plates, certified to AWS D1.1 or EN ISO 15614
- Dimensional inspection report confirming thickness, width, length, and flatness tolerance against the agreed standard
- Export documentation package including commercial invoice, packing list, bill of lading, and certificate of origin for customs clearance at destination port
Packaging, Loading & Delivery
- 6 mm hot rolled black plates bundled with steel strapping and edge protectors to prevent coil edge damage and preserve surface condition during handling
- 1500 × 6000 mm sheets loaded in standard 20ft or 40ft containers with timber dunnage and internal bracing to prevent shifting and edge deformation on rough sea conditions
- Heat number and steel grade stenciled on each plate bundle for site identification and traceability verification upon arrival
- Custom cutting to project-specific lengths available before shipping, reducing on-site waste and cutting labor for EPC contractors
- FOB, CIF, and DDP terms supported with complete export documentation and container tracking until port discharge
Starting Your SS400 Q235 A36 Hot Rolled Carbon Steel Plate Order
Share your project drawings (PDF or DWG), required steel grade, thickness, quantity, and destination port — we respond within one day with a detailed quotation including material, fabrication, coating, packing, and shipping costs, along with a shop drawing timeline and production schedule.
Request a Quotation with Mill Test Certificate
Send your specifications and steel grade requirements to receive pricing, MTC samples, and a fabrication timeline.
Contact: Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.xjystructure.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@xjystructure.com
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
Frequently Asked Questions
Q: What is the difference between SS400, Q235, and A36 — can they be used interchangeably?
A: These three grades belong to the same mild carbon steel category but follow different national standards — JIS, GB, and ASTM respectively. They share similar tensile and yield ranges, but chemical composition limits and sub-grade classifications differ. For international projects, equivalence should be confirmed against the project specification before shop drawing approval.
Q: Can you provide third-party inspection for the 6 mm plates before shipping?
A: Yes. SGS, BV, and TÜV inspections can be arranged for dimensional verification, surface condition check, and coating thickness measurement. The inspection report is included in the export documentation package.
Q: Do you offer CNC cutting and bending services for the hot rolled plates?
A: Yes. Our fabrication workshop provides CNC plasma and flame cutting, drilling, and bending per approved shop drawings. Welding is performed under certified WPS procedures with qualified welders holding AWS or EN certification.
Q: What surface treatment options are available for the hot rolled black plates?
A: Standard delivery is hot rolled black surface. Shot blasting followed by primer painting or full coating systems can be applied per project specification. Galvanizing is available for specific corrosion protection requirements.
Q: How do you ensure material traceability from the mill to the fabrication stage?
A: Every plate is marked with the heat number at the rolling stage. The mill test certificate, fabrication records, and final inspection reports all reference the same heat number, providing full traceability from raw material to finished component.
Get Your SS400 Q235 A36 Hot Rolled Carbon Steel Plate Quote Today
Submit your project drawings, steel grade, and quantity to receive a detailed quotation with mill test certificate samples and production schedule within one working day.
Contact: Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.xjystructure.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@xjystructure.com
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
