As-Rolled Steel Surface
Q355B hot-rolled finish with the natural plate texture visible.
Global Steel Supply & Processing
High-Strength Low-Alloy Structural Steel | GB/T 1591-2018
8 MILLION MT ANNUAL STEEL PRODUCTION
Source Q355B structural steel plate for fabricated frames, equipment structures and bulk distribution. Send your thickness, plate dimensions, quantity and destination for factory pricing.
View Q355B specifications ↓
Match the material grade, ordered thickness and delivery conditions to your drawing or plate list.
| Material | Q355B High-Strength Low-Alloy Structural Steel Plate |
| Steel grade standard | GB/T 1591-2018 |
| Hot-rolled plate supply | GB/T 3274-2017, when specified for the ordered product |
| Dimensions & tolerances | GB/T 709-2019 and the agreed purchase specification |
| Product form | Hot-rolled plate; as-rolled condition |
| Thickness | Submit the required thickness schedule for supply confirmation |
| Width & length | Mill plate sizes or agreed cut-to-size dimensions |
| Surface & edge | Natural hot-rolled finish; mill or cut edges according to order |
| Inspection | Heat analysis, mechanical test results, identification and requested MTC |
| Quotation details | Thickness × width × length, metric tons, inspection scope, destination port |
Check the thickness band that matches your purchase order. Strength and chemical limits follow the applicable GB/T 1591 requirements.
| Plate thickness | Min. yield | Tensile strength |
|---|---|---|
| ≤ 16 mm | 355 MPa | 470–630 MPa |
| > 16–40 mm | 345 MPa | 470–630 MPa |
| > 40–63 mm | 335 MPa | 470–630 MPa |
| > 63–80 mm | 325 MPa | 470–630 MPa |
| > 80–100 mm | 315 MPa | 470–630 MPa |
| > 100–150 mm | 295 MPa | 450–600 MPa |
Reference values for hot-rolled Q355B under GB/T 1591-2018. Elongation and impact tests follow the specified test piece and delivery requirements.
| Element | ≤ 30 mm | > 30–100 mm |
|---|---|---|
| Carbon (C) | ≤ 0.24% | ≤ 0.22% |
| Silicon (Si) | ≤ 0.55% | ≤ 0.55% |
| Manganese (Mn) | ≤ 1.60% | ≤ 1.60% |
| Phosphorus (P) | ≤ 0.035% | ≤ 0.035% |
| Sulfur (S) | ≤ 0.035% | ≤ 0.035% |
Selected reference maximum mass fractions for the stated thickness ranges. Your material certificate provides the measured heat analysis.
Estimate the theoretical tonnage of your Q355B plates from finished dimensions and plate count.
Based on a nominal steel density of 7,850 kg/m³. Final order weight follows agreed measurement and tolerance terms.
A complete plate schedule helps you compare delivery and inspection terms on the same basis.
Use clear product views to assess the finish, visible plate edges and handling condition for your order.
Q355B hot-rolled finish with the natural plate texture visible.
Mill-edge and cut-edge requirements can be included in your dimensional schedule.
Q355B is selected for load-bearing structural work and fabricated equipment. Final grade and plate thickness follow your engineering design.
Plates for fabricated columns, support frames, stiffeners and load-transfer connections.
Steel plate used in fabricated equipment bases, welded support assemblies and industrial structures.
Material for industrial platforms, mezzanine supports and framed access structures.
Plate for gussets, stiffener assemblies and bolted or welded structural joints.
Fabricated frames used in material-handling and workshop equipment.
Structural plate components selected against project-specific engineering and inspection requirements.
Production scale, broad steel inventory and coordinated order execution support your regular and project-based purchasing.
Our actual annual steel production provides scale for scheduled procurement and recurring industrial orders.
Manufacturing →Our combined steel inventory supports supply planning. Q355B availability is checked by your exact plate schedule.
Steel Inventory →Specify grade, dimensions, test reports and heat traceability so the order can follow your quality requirements.
Quality Control →Plate lists, packing instructions and destination ports are consolidated into a clear quotation and shipment plan.
Contact Sales →For structural steel sourcing, your plate order starts with defined grade, thickness, sizes and test requirements. Our team aligns the production or stock supply arrangement with your purchase list.
Share your required sizes and shipment volume. We will check Q355B stock availability, production arrangements, packaging and delivery terms against your schedule.
Add your inspection requirements to the RFQ. The material documentation scope can cover heat analysis, tensile testing, impact testing, plate measurement and identification records as specified.
Send your cutting layout or drawings with the plate order. Our team can confirm available cutting and drilling arrangements, processing tolerances and corresponding delivery schedules.
Your quantity, plate dimensions, lifting requirements and discharge port guide the packing and logistics plan. Include any special marks or handling instructions with the purchase order.
Review other steel grades and plate categories for your project or distributor product range.
Quick answers to help you prepare a steel plate purchase inquiry.
For Q355B hot-rolled steel up to 16 mm thick, GB/T 1591-2018 specifies a minimum yield strength of 355 MPa. Thickness-dependent values are listed above for heavier plate.
Send the thickness, width, length, quantities, delivery destination and applicable inspection requirements. Include cutting drawings for fabricated plate profiles.
List your heat analysis, tensile test, impact test and traceability requirements in the RFQ. Our team will confirm the documentation scope for the quoted order.
Send your required grade, dimensions, quantity and destination. Our team will review the inquiry.