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Help CenterCarbon Steel Plate Q235B Q345B 8mm 10mm 12mm 16mm 1500x3000mm Hot Rolled Standard Compliant
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Welcome to Hemaokang Steel (Shandong) Co., Ltd. – your trusted partner in high-quality steel products. Our Carbon Steel Plate Q235B Q345B in thicknesses of 8mm, 10mm, 12mm, and 16mm, with standard dimensions of 1500x3000mm, is hot-rolled and manufactured to meet strict industry standards. Backed by our ISO9001-certified production system and an annual export value of US$50–100 million, we deliver reliable plates that excel in structural, mechanical, and engineering applications. Explore the features and benefits that make our steel plates a preferred choice worldwide.
Key Features & Technical Specifications
- Material Grades: Available in Q235B (general structural) and Q345B (higher strength, better weldability) – both compliant with GB/T 700 and GB/T 1591 standards.
- Hot Rolled Process: Ensures uniform mechanical properties, excellent surface finish, and superior formability for bending, welding, and cutting.
- Multiple Thicknesses: 8mm, 10mm, 12mm, and 16mm – ideal for a wide range of load-bearing and fabrication projects.
- Large Sheet Size: 1500mm width x 3000mm length – reduces waste and simplifies handling in large-scale construction.
- Standard Compliance: Meets or exceeds international standards such as GB/T, ASTM A36, JIS G3101, and EN 10025 (upon request).
- Surface Quality: Clean, smooth hot-rolled surface with minimal scale – ready for painting, galvanizing, or further processing.
- Versatile Applications: Used in building frames, bridges, shipbuilding, pressure vessels, machinery parts, and general fabrication.
- ISO9001 Certified: Our production and quality control processes are audited and certified, ensuring consistent product reliability.
| Parameter | Value |
|---|---|
| Grade | Q235B, Q345B |
| Thickness (mm) | 8, 10, 12, 16 |
| Width (mm) | 1500 |
| Length (mm) | 3000 |
| Surface | Hot Rolled, Black |
| Yield Strength (Q235B) | ≥235 MPa (t≤16mm) |
| Yield Strength (Q345B) | ≥345 MPa (t≤16mm) |
| Tensile Strength (Q235B) | 370–500 MPa |
| Tensile Strength (Q345B) | 470–630 MPa |
| Standard | GB/T 700, GB/T 1591, ASTM A36 (optional) |
| Certification | ISO9001:2025 |
Why Choose Hemaokang Steel Plates?
Our hot-rolled carbon steel plates offer a balance of strength, ductility, and weldability. The Q345B grade provides higher yield strength than Q235B, making it suitable for heavy-duty structures, while Q235B remains cost-effective for general applications. With precise thickness tolerance (typically ±0.5mm to ±1.0mm) and consistent flatness, these plates reduce machining time and material waste. The 1500x3000mm size is a common standard for modular construction, allowing efficient layout and cutting.
Customer Benefits:
- Reduced procurement complexity – one source for multiple thicknesses and grades.
- Lower total cost of ownership thanks to high-quality steel that meets project specifications.
- Fast turnaround – our large inventory and efficient logistics ensure timely delivery.
- Flexible customization – additional cutting, drilling, or painting services available upon request.
- Global reach – we export to North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East.
Trusted by Industries Worldwide
Since our establishment in 2025, Hemaokang Steel has grown rapidly, with an annual export value of US$50 million to US$100 million and a dedicated team of 51–100 employees. Our ISO9001 quality management system ensures every plate undergoes rigorous inspection – from chemical composition analysis to mechanical testing. We serve diverse markets including domestic China, Eastern Europe, and the Americas, and have earned a reputation for reliability and professionalism.
Don't compromise on quality for your next project. Whether you need Q235B for general fabrication or Q345B for heavy structural loads, our hot-rolled carbon steel plates in 8mm to 16mm thickness are ready to ship. Contact us today for a competitive quote, technical datasheet, or sample. Let Hemaokang Steel be your reliable partner in steel supply.
Frequently Asked Questions
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Q: What is the difference between Q235B and Q345B steel plates?
A: Q235B is a general structural steel with minimum yield strength of 235 MPa, while Q345B has higher strength (≥345 MPa) and better weldability. Q345B is often used for heavy-duty or load-bearing structures, whereas Q235B is more cost-effective for light to medium applications. -
Q: Are these plates compatible with ASTM A36 standards?
A: Yes, Q235B is chemically and mechanically similar to ASTM A36, and Q345B is comparable to ASTM A572 Grade 50. We can also produce plates to ASTM A36 specification upon request. -
Q: What thickness tolerance do you guarantee?
A: Our hot-rolled plates typically meet GB/T 709 tolerance class B, which is ±0.5mm for 8mm, ±0.6mm for 10mm, ±0.7mm for 12mm, and ±0.8mm for 16mm thickness. Tighter tolerances are available for custom orders. -
Q: Can you supply plates in other sizes or custom dimensions?
A: Absolutely. We offer custom cutting, including length and width modifications. Minimum order quantity may apply for non-standard sizes. Please consult our sales team for details. -
Q: What surface treatments are available?
A: Standard delivery is hot-rolled black surface. We can also provide shot blasting, priming (shop primer), or oiling to prevent rust during transit. Customized surface treatments are available upon request. -
Q: How do you ensure the quality of the plates?
A: Our ISO9001-certified quality system includes chemical analysis (spectrometer), tensile testing, bending test, and ultrasonic inspection (optional). Each batch is issued with a mill test certificate. -
Q: What is the typical lead time and packaging?
A: For stock sizes, shipment can be arranged within 7–15 days after order confirmation. Plates are packed in bundles with steel straps, and sea-worthy packaging (e.g., waterproof paper, wooden crates) is available for export. -
Q: Do you offer samples before bulk order?
A: Yes, we can provide small samples (e.g., 200x200mm) for evaluation. The sample cost and shipping are negotiable; for regular customers, samples may be free of charge.
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