Building & Structural Fabrication
Source plate for welded columns, girders, connection assemblies and structural bracing components.
Global Steel Supply & Processing
JIS G 3106:2024 | Hot-Rolled Steel for Welded Structures
8 MILLION MT ACTUAL ANNUAL STEEL PRODUCTION
Share your thickness, plate dimensions, total tonnage and receiving port. Get a quotation prepared around your welded-structure requirements and inspection scope.
View SM490A specifications ↓Match your purchase schedule to JIS G 3106, your drawing dimensions and your agreed plate inspection requirements.
| Steel grade | SM490A |
| Material standard | JIS G 3106:2024 |
| Product form | Hot-rolled steel plate for welded structures |
| Plate tolerance reference | JIS G 3193:2025, where applicable to your order |
| Nominal thickness | Specify your required thickness in millimetres |
| Width × length | Supplied against your plate schedule and confirmed availability |
| Surface and edges | Hot-rolled mill finish; edge preparation as agreed |
| Testing and documents | Heat analysis, mechanical test results, MTC and additional inspection as ordered |
| Purchase quantity | Metric tonnes and/or number of plates |
Specify SM490A for welded components where your engineering drawings call for the JIS G 3106 material grade, structural strength and defined acceptance testing.
Source plate for welded columns, girders, connection assemblies and structural bracing components.
Order plate to your approved project specification for bridge fabrication and heavy equipment frames.
Structural plate for fabricated beams and welded support assemblies.
Plate components specified by bridge and infrastructure drawings.
Equipment skids, machine bases and welded industrial frames.
Fabricated members for industrial access and support structures.
Specified welded plate parts for rolling stock and transport equipment.
Frames, support rings and structural components for storage facilities.
Plan your structural plate procurement with measurable production scale, company-wide inventory, order-specific inspection and export delivery coordination.
Our actual annual output reaches 8 million metric tons of steel across our product range. Coordinate recurring plate schedules with our team.
Explore Manufacturing ↗Our regular company-wide inventory reaches 1 million metric tons. Share your SM490A dimensions and volume to check current supply options.
Steel Inventory ↗Send your applicable standard, size tolerances, MTC requirements and additional test scope so the quotation reflects your order.
Quality Control ↗Specify your tonnage, packing preferences, delivery terms and destination port. Receive coordinated commercial information for procurement review.
Use the thickness band in your steel plate schedule when reviewing the specified minimum yield strength.
| Plate thickness (t) | Minimum yield strength | Tensile strength |
|---|---|---|
| t ≤ 16 mm | 325 MPa | 490–610 MPa |
| 16 < t ≤ 40 mm | 315 MPa | 490–610 MPa |
| 40 < t ≤ 100 mm | 295 MPa | 490–610 MPa |
| 100 < t ≤ 160 mm | 285 MPa | 490–610 MPa |
| 160 < t ≤ 200 mm | 275 MPa | 490–610 MPa |
Include your nominal thickness, tensile testing, elongation and any project-specific impact or supplementary tests in your enquiry.
Reference grade values from JIS G 3106:2024. Final acceptance follows the ordered standard edition, product form and corresponding material test results.
Specify your plate thickness and check the applicable heat-analysis limits before finalizing your purchase requirements.
| Element | t ≤ 50 mm | 50 < t ≤ 200 mm |
|---|---|---|
| Carbon (C) | ≤ 0.20% | ≤ 0.22% |
| Silicon (Si) | ≤ 0.55% | ≤ 0.55% |
| Manganese (Mn) | ≤ 1.65% | ≤ 1.65% |
| Phosphorus (P) | ≤ 0.035% | ≤ 0.035% |
| Sulfur (S) | ≤ 0.035% | ≤ 0.035% |
Include your required chemical analysis, heat traceability and test certificate format with your RFQ. Your inspection package can be reviewed alongside the grade and plate dimensions.
Review plate finish and edge requirements for your fabrication process and handling arrangement.
Specify your required surface finish and any surface acceptance conditions.
Share your nominal thickness, width, length and edge preparation requirements.
Estimate your shipment quantity from nominal dimensions with a reference density of 7,850 kg/m³.
Theoretical mass uses nominal plate dimensions; certified shipment weights follow the agreed delivery documents.
Work with BAOSTEEL METAL for planned structural steel purchases. Our company produces 8 million metric tons of steel annually across multiple product lines, with a factory area of 500,000 m² and a workforce of more than 1,000.
Send your material list to check SM490A plate availability and production arrangements. Our company maintains approximately 1 million metric tons of steel inventory across its product range.
Request test documentation that supports your purchase order acceptance. State your needs for heat identification, mechanical test results, dimensional checks and any third-party witness inspection.
Material grade, heat analysis and relevant test values tied to your ordered plates.
Plate dimensions, surface checks and agreed supplementary testing scope.
Add your processing drawings to the plate RFQ when your project calls for prepared steel parts. Specify thickness, cut profile, tolerances and required edge condition.
Include your shipping destination, cargo quantity and required packing method. Our team will coordinate plate bundling, handling and shipment arrangements to match the confirmed order.
Review additional material standards for your fabrication schedules. Confirm the grade and acceptance specification specified by your project.
The key details that help our sales team prepare your plate quotation.
Send your thickness, width, length, total quantity, delivery destination, requested standard edition and inspection requirements.
JIS G 3106 lists 325 MPa for thickness up to 16 mm, with lower minimum values in the thicker plate categories. Use your exact thickness band from the table above.
Specify your MTC, heat-traceability requirements, dimensional inspection and supplementary testing scope during enquiry review.
Attach your drawings and specify the cut dimensions, edge conditions and required tolerances for processing feasibility and pricing.
Send your required grade, dimensions, quantity and destination. Our team will review the inquiry.