
| Grade | Q345B |
| Width | 1500–4000 mm |
| Surface Finish | Mill Finish |
| Length | Custom |
| Stock | Contact for stock |
| MOQ | Flexible MOQ · 24h reply |
| Lead Time | 7-15 days |
| Certificate | ISO 9001, SGS, ASTM A36, EN 10025-2, GB/T 700 |
Current stock covers width 1500–4000 mm. Q345B is a low-alloy high-strength structural steel equivalent to S355/A572, delivering 345 MPa minimum yield. It is stocked for Bridge construction, heavy equipment and pressure vessels. We slit, cut and finish to order, with MTC documentation and 7-10 day dispatch on stocked sizes.
| Specification | Value |
|---|---|
| Width | 1500–4000 mm |
| Surface Finish | Mill Finish |
| Length | Custom |
| C | Si | Mn | P | S | V | Nb |
|---|---|---|---|---|---|---|
| ≤0.20 | ≤0.50 | 1.00–1.60 | ≤0.035 | ≤0.035 | 0.02–0.15 | ≤0.05 |
| Property | Value |
|---|---|
| Tensile Strength | 470–630 MPa |
| Yield Strength | ≥345 MPa |
| Elongation | ≥21% |
| Hardness | ≤170 HB |
| Density | 7.85 g/cm³ |
1Each product is covered with PE protective film to prevent scratches and oxidation during transit and storage.
2Products are wrapped with moisture-proof paper and foam to provide cushioning and humidity protection.
3Steel strapping and corner protectors are applied to reinforce the package structure for heavy-duty transport.
4Each package is clearly labeled with product specifications, batch number, weight, and handling instructions.
1Confirm specs, quantity and lead time, sign PI, then schedule production after deposit received.
2Manufacturing with in-line quality checks; SGS/BV third-party inspection available upon request.
3Container booking, factory loading, and departure from Shanghai or Ningbo port.
4Customs declaration, Bill of Lading, and all export documents issued for smooth clearance.