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Help CenterHot Rolled Carbon Steel Round Bar Q235B Q345B 20mm-200mm Diameter 6m Length
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Hemaokang Steel (Shandong) Co., Ltd. is a professional manufacturer and exporter of hot rolled carbon steel round bars, compliant with ISO9001 quality management system. Our Q235B and Q345B round bars, with diameters ranging from 20mm to 200mm and standard length of 6 meters, are widely used in construction, machinery, and industrial applications. We combine rigorous quality control with competitive pricing to provide reliable steel solutions for global buyers.
Our hot rolled round bars are produced under strict standards, ensuring excellent mechanical properties and dimensional accuracy. Whether you need structural support or machining stock, our products deliver consistent performance and strength.
Product Features
- High Strength & Durability: Q235B offers good weldability and formability, while Q345B provides higher yield strength for heavy-duty applications.
- Precise Dimensions: Diameter tolerance meets GB/T 702-2004 standard, ensuring consistent quality for further processing.
- Versatile Applications: Suitable for steel structures, bridges, shafts, bolts, and general engineering components.
- Customizable Lengths: Standard 6m length is available, with custom lengths up to 12m upon request.
- Surface Finish: Hot rolled surface with smooth finish, easily machinable or further treated.
- Cost-Effective: Direct factory supply reduces middleman costs, offering competitive prices without compromising quality.
Technical Specifications
| Parameter | Value |
|---|---|
| Material Grade | Q235B, Q345B (or equivalent) |
| Diameter Range | 20mm – 200mm |
| Length | 6m (other lengths available) |
| Yield Strength (Q235B) | ≥235 MPa |
| Yield Strength (Q345B) | ≥345 MPa |
| Tensile Strength (Q235B) | 375-500 MPa |
| Tensile Strength (Q345B) | 470-630 MPa |
| Surface | Hot Rolled, black finish |
Why Choose Hemaokang Steel?
With an annual export value of US$50 million to US$100 million, we serve markets across North America, South America, Europe, Southeast Asia, Africa, Oceania and more. Our team of 51-100 experienced professionals ensures timely delivery and strict quality control. We hold ISO9001 certification, guaranteeing that every product meets international standards.
Our hot rolled carbon steel round bars are produced in state-of-the-art facilities in Liaocheng, Shandong – a major steel production hub. We offer flexible packaging (bundles, steel straps) and loading options (container or bulk vessel) to suit your logistics needs.
Contact us today for a competitive quote or sample. We are committed to being your reliable partner in carbon steel products.
Frequently Asked Questions
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Q: What is the difference between Q235B and Q345B?
A: Q235B has lower carbon content and yield strength (≥235 MPa), suitable for general structural use. Q345B has higher strength (≥345 MPa) and better toughness, ideal for heavy-duty applications. -
Q: Can you supply bars with a diameter larger than 200mm?
A: Yes, we can produce diameters up to 350mm on request. Please contact us for custom sizes. -
Q: What is the standard length? Can you cut to specific lengths?
A: Standard length is 6m. We offer cutting services to custom lengths, e.g., 3m, 4m, 5m, or 12m, with additional charges. -
Q: Are the bars suitable for welding?
A: Both Q235B and Q345B have good weldability. Q235B is easier to weld, while Q345B requires preheating for thicker sections. -
Q: What packaging do you provide?
A: Standard packaging is in bundles with steel straps. For sea freight, we use waterproof plastic or canvas wrapping as needed. -
Q: What is the delivery time?
A: Typically 15-30 days after order confirmation, depending on quantity and size. We can expedite for urgent orders. -
Q: Do you provide third-party inspection?
A: Yes, we accept inspection by SGS, BV, or other agencies at buyer's request. Our own QC team also conducts in-house testing. -
Q: What is the minimum order quantity (MOQ)?
A: MOQ is usually 5 tons for standard sizes. For trial orders, we can negotiate smaller quantities.
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