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Hot Rolled Round Bar Q235
Introduction to Q235 Hot Rolled Round Bar
Hot rolled round bar Q235 is a low-carbon structural steel widely used in construction, machinery, and general engineering. Its excellent weldability, ductility, and cost-effectiveness make it ideal for load-bearing components.
As a leading steel trader, we supply ASTM/EN/JIS-compliant Q235 steel bars with customizable sizes and guaranteed tolerances.
| Characteristics | Parameters/Description |
|---|---|
| Yield strength | ≥235 MPa (normal temperature) |
| Tensile strength | 375-500 MPa |
| Elongation | ≥26% (thickness ≤16mm) |
|
Chemical composition |
C≤0.22%, Mn≤1.4%, Si≤0.35%, S/P≤0.045% (Grade A) |
|---|---|
| Processability |
Excellent welding, cold bending and cutting performance, suitable for a variety of forming processes. |
|
Economical |
Low unit price (about 4000-4800 yuan/ton), sufficient inventory, short delivery cycle. |
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Care and maintenance
In order to extend the service life of hot rolled round bar Q235, the following care and maintenance measures should be taken:
Storage environment: The place where steel is stored should be clean, well-drained, and away from factories and mines with harmful gases or dust. It should not be stacked together with corrosive substances such as acids, alkalis, and salts in the warehouse.
Classified storage: Different types of steel need to be stored separately to prevent confusion and corrosion.
Moisture-proof and sun-proof: The storage warehouse needs to be dry to avoid rain leakage and exposure.
Process flow
The processing technology of hot-rolled round steel bar mainly includes: raw materials, heating, rolling, cooling, finished product processing and other links. Its processing flow includes the following steps:
1. Raw material selection: Select suitable steel billets as raw materials, usually low carbon steel, medium carbon steel or alloy steel.
2. Heating: Heat the steel billet to a certain temperature, generally around 1000℃. This step is mainly to improve the plasticity of the steel billet and facilitate the subsequent rolling process.
3. Rolling: Roll the hot-processed steel billet into a round shape. This step requires a steel rolling mill. During the rolling process, the steel billet will undergo multiple roll extrusion deformations to form the required shape.
4. Cooling: Cool the rolled round steel to room temperature to keep the required shape and improve its mechanical properties.
5. Finished product processing: Finished product processing of hot-rolled round steel, including sawing, turning, grinding and other processes. This step is mainly to improve the precision and surface finish of hot-rolled round steel and enhance its mechanical and decorative properties.
Application fields
1. Construction and decoration
As a building material, hot-rolled round steel can be used to manufacture stair handrails, fences, windows, doors and other parts.
As a building material, hot-rolled round steel can be used to manufacture stair handrails, fences, windows, doors and other parts.
2. Machinery manufacturing
Carbon steel bar Q235 can be used to process various parts, such as bearings, gears, shafts, etc., and is widely used in machinery manufacturing, automobile manufacturing and other fields.
Carbon steel bar Q235 can be used to process various parts, such as bearings, gears, shafts, etc., and is widely used in machinery manufacturing, automobile manufacturing and other fields.
3. Petrochemical industry
Round carbon steel bar rod Q235 can be used to manufacture pipelines and storage tanks in petrochemical industry. It has excellent corrosion resistance and can be used for a long time in complex environments.
Round carbon steel bar rod Q235 can be used to manufacture pipelines and storage tanks in petrochemical industry. It has excellent corrosion resistance and can be used for a long time in complex environments.
Q235 hot-rolled round bar procurement and processing guide
1. Key parameters for selection
Diameter range: Φ10mm-Φ300mm (common specifications Φ20mm-Φ80mm).
Grade selection: Q235A: general environment (indoor structure). Q235C/D: low temperature or dynamic load scenario (-20℃ impact test).
2. Processing precautions
2. Processing precautions
| Process | Key points |
|---|---|
| Welding | Use J422 welding rod, no preheating required (thickness ≤ 20mm) |
| Cold bending | Minimum bending radius ≥ 2 times the diameter (to avoid surface cracking) |
| Surface treatment | Sandblasting to remove oxide scale → galvanizing/painting (outdoor rust prevention) → fine grinding (precision parts) |
Competitive Advantages of Our Q235 Round Bars
1. Precision Manufacturing
Diameter Range: 10 mm to 300 mm
Length: 3–12 meters (custom cuts available)
Tolerance: ±0.5 mm (meets ISO 286-2 standard)
2. Supply Chain Efficiency
Delivery: 15–30 days
Certifications: ISO 9001, SGS, Mill Test Reports
3. Cost-Saving Solutions
Bulk Discounts: off for 100+ MT orders
Logistics Support: Containerized or bulk shipping
Q235 hot-rolled round bars continue to lead the general structural steel market with the three core values of "economical and practical, flexible processing, and stable supply".
Whether it is traditional infrastructure, machinery manufacturing, or emerging new energy projects, choosing Q235 round bars means finding the best balance between cost and performance.
Contact certified suppliers now to get real-time quotes and customized services to speed up and increase efficiency for your project!
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