Description
Factory-direct Q235 carbon steel plate supply — Hot rolled plates in Q195 through Q235 and international equivalents ship directly from our Jinan facility with full mill test documentation and third-party inspection support.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Q195 & Q235 Carbon Steel Plate |
| Product Type | Steel Plate |
| Steel Grade | Q195, Q235, S235, S355, A36, SS400 |
| Standard | AISI, ASTM, BS, DIN, GB, JIS |
| Section Shape | Flat plate |
| Thickness | 4.5–25mm (extended range up to 100mm available) |
| Width | 800–1200mm (up to 2000mm available) |
| Length | 2000–5000mm (up to 6m available) |
| Technique | Hot Rolled |
| Surface Treatment | Mild steel plain finish / Hot dip galvanized / Color coated |
| Tolerance | ±1% |
| Processing Service | Bending, Welding, Decoiling, Cutting, Punching |
| Delivery Time | 7–15 days |
| Application | Shipbuilding, Boiler, Container, Bridge, Automobile, Roofing, High-strength structural fabrication |
| MOQ | 5 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Shipbuilding & Marine | Hull plating, deck structures, bulkhead frames |
| Container Manufacturing | Side wall panels, corner castings, floor cross members |
| Bridge & Infrastructure | Girder web plates, gusset plates, bearing stiffeners |
| Boiler & Pressure Equipment | Shell plates, header boxes, non-pressure structural supports |
| Industrial Construction | Column base plates, mezzanine flooring, crane runway beams |
| Automobile & Transport | Chassis cross members, trailer floor plates, load-bearing brackets |
What Thickness Tolerance Costs on a Container Fabrication Line
A Q235 carbon steel plate supplier who cannot hold ±1% thickness tolerance will cost you more in CNC scrap than you save on unit price.
I watched a batch of Q235 plates get rejected at a Middle East container yard because the actual thickness ran 0.8mm below nominal. The CNC punching lines were programmed to exact gauge — every plate came off the line with misaligned corner holes. The entire container was scrapped. That kind of loss does not show up in the purchase order, but it shows up fast in the relationship with your end client. [NEED_CITE: thickness tolerance requirements for structural steel plates in container manufacturing]
When sourcing a Q235 carbon steel plate supplier, the real risk is not the listed price. It is the negative tolerance drift that accumulates across a full container load. Mills running older rolling schedules may push thickness to the lower edge of allowable variance. Without in-house verification and documented test results, the buyer absorbs every downstream cost — re-machining, re-welding, or outright rejection at the fabrication site.
Matching Q235 Plate to Structural and Container Fabrication Requirements
Hot rolled Q235 plates in the 4.5–25mm range cover the majority of container side-wall and floor-frame applications where moderate yield strength and good weldability are the primary requirements. For shipbuilding and bridge gusset use, the same grade performs well when the design calls for forming and welding without post-weld heat treatment. Our processing line handles cutting, bending, and punching to project dimensions, which eliminates secondary fabrication cost at the assembly yard. As a Q235 carbon steel plate supplier with in-house physical and chemical testing, we verify every heat before release.
Engineering Compliance and Surface Selection for Export Projects
Structural plates for EU-bound projects must conform to EN 10219 or EN 10025 dimensional and chemical requirements, and the mill test certificate must reference the correct standard designation — not a generic “carbon steel plate” label. [NEED_CITE: EN 10025 hot rolled structural steel product requirements] For marine and container environments, the choice between plain hot rolled finish, hot dip galvanized coating, or color coated surface directly determines corrosion resistance over the service life. Galvanized plates suit exposed structural frames in humid coastal sites; color coated plates serve architectural cladding where appearance matters. Grade equivalence between Q235 and S235JR must be confirmed against the project specification before order placement, as chemical composition limits differ slightly between GB and EN systems.
Steel Grade Selection and Hot Rolling Process Fundamentals
Q195 and Q235 belong to the Chinese GB/T 700 carbon structural steel system, where the number indicates the minimum yield strength in MPa. Q235 offers higher load-bearing capacity than Q195 and remains the most widely specified grade for general structural and container fabrication across Asia, the Middle East, and Africa. Its international equivalents — S235JR under EN 10025, A36 under ASTM A36, and SS400 under JIS G3101 — share similar carbon and manganese ranges, but the sulfur and phosphorus limits vary. A competent Q235 carbon steel plate supplier must provide clear grade mapping so the buyer avoids ordering the wrong designation for the destination market. [NEED_CITE: steel grade equivalence mapping between GB Q235 EN S235JR and ASTM A36]
Hot rolling produces a mill scale surface that provides baseline corrosion resistance for indoor and sheltered applications. When the plate will serve in exposed or corrosive environments, hot dip galvanizing adds a zinc layer that sacrificially protects the base metal. Color coating over a galvanized substrate combines barrier protection with aesthetic flexibility. The ±1% thickness tolerance on our hot rolled plates ensures that theoretical weight calculations match actual delivered weight within acceptable commercial variance.
Hidden Costs of Sourcing from an Unverified Q235 Carbon Steel Plate Supplier
Plates shipped without proper mill test certificates get held at customs — particularly in EU ports where CE marking and EN standard references are mandatory for structural steel. [NEED_CITE: CE marking requirements for structural steel under EN 1090] Negative tolerance beyond the stated ±1% range reduces actual load-bearing cross-section, which can trigger engineering rejection during third-party inspection at the fabrication site. Grade mislabeling — shipping Q195 against a Q235 order — creates weld procedure qualification failures and potential structural safety liability. These costs do not appear on the commercial invoice but accumulate through project delays, re-inspection fees, and replacement shipments.
Why Project Teams Source from Shandong Xin Jiyuan
We operate three production lines covering over 2,800 specifications, and our in-house physical and chemical laboratory tests every heat for composition and mechanical properties before release. Our facility holds ISO 9001:2015 certification, Lloyd’s CE marking under EN 10219/EN 10210, and Singapore FPC approval — documentation that clears customs across EU, Middle Eastern, and Southeast Asian ports without delay. We accept SGS or BV third-party inspection on any order, and our professional loading team uses anti-damage measures to prevent edge deformation and surface scratching during ocean transit. Custom non-standard dimensions and定尺 cutting are available with low MOQ, and we have exported to over 50 countries with full traceability by heat number.
Documentation & Compliance
- Mill test certificate documenting Q235 chemical composition and mechanical properties per GB/T 700, with heat number traceability
- CE certificate under EN 10025 / EN 10219 for structural plate shipments to EU member states
- ISO 9001:2015 quality management system certificate covering hot rolled plate production
- SGS or BV third-party inspection report available upon request for pre-shipment verification
- Material traceability report linking each plate to heat number, rolling schedule, and test results
- Full customs documentation including packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- Hot rolled Q235 plates bundled with steel strips and edge protectors to prevent corner damage during handling and ocean transit
- Galvanized plates wrapped with moisture-resistant paper and plastic film to preserve zinc coating integrity in humid shipping conditions
- Container loading optimized for plate dimensions up to 6m length, with wooden cradles and anti-shift bracing to prevent movement
- Custom cutting to project-specified lengths available, with dimensional tolerance marked on each piece
- Heat number and steel grade stenciled on every plate for site-level traceability and inspection verification
- FOB, CIF, and DDP shipping terms available with door-to-door logistics coordination to final destination
Starting Your Q235 Carbon Steel Plate Procurement
Submit your plate dimensions, steel grade requirement, surface treatment preference, quantity, and destination port. We respond within 12 hours with a detailed quotation including unit price, lead time, and shipping terms. Mill test certificates and third-party inspection arrangements are confirmed before production begins.
Request Your Q235 Carbon Steel Plate Quotation
Send your specifications, grade, and quantity to receive pricing and mill test documentation within 12 hours.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxjypipe.com
Website: www.sdxjypipe.com
