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Q235B Hot rolled steel coil general purpose building structure steel
Q235B Hot rolled steel coil general purpose building structure steel
Q235B Hot rolled steel coil general purpose building structure steel
Product overview
Steel coil is a rolled steel formed by hot rolling, cold rolling and other processes, with high strength, easy processing, flexible specifications and other characteristics, widely used in construction, automobile, machinery manufacturing, energy and other fields.
Production technology
- Hot rolled steel coil: high temperature rolling, thicker surface oxide, suitable for structural parts.
- Cold rolled steel coil: normal temperature rolling, surface smooth and high precision, for precision machining.
- Galvanized/color coated steel coil: surface galvanized or coated with anti-corrosion layer, strong weather resistance.
- Pickling annealed steel coil: remove the oxide skin and soften the material to improve the processing performance.
Mechanical property
| Performance index | Parameter range | Applicable standard |
| Tensile strength (MPa) | 300-600 (conventional steel coil) | GB/T 700, ASTM A36 |
| Yield strength (MPa) | 200-500 | JIS G3101, EN 10025 |
| Elongation | 15%-30% | Adjust according to material and process |
| Hardness (HV) | 120-200 (cold rolling higher) | —— |
Implement standard control
| Standard type | Standard number (example) | Scope of application |
| China Standard (GB) | Q235（GB/T 700） | Ordinary carbon structural steel |
| American Standard (ASTM) | ASTM A36 | General purpose structural steel |
| Japanese Standard (JIS) | SS400（JIS G3101） | Rolled steel for general construction |
| European Standard (EN) | S235JR（EN 10025-2） | Non-alloy structural steel |
Chemical composition (take Q235B as an example)
| element | Content range | effect |
| C | 0.12%-0.20% | Increase strength and reduce ductility |
| SI | ≤0.35% | Enhanced hardness and corrosion resistance |
| MN | 0.30%-1.40% | Improve toughness and wear resistance |
| P | ≤0.045% | Excess will reduce plasticity |
| S | ≤0.045% | Excess leads to thermal brittleness |
Technical parameter
- Thickness range: 0.3mm-20mm (thinner in cold rolling, thicker in hot rolling).
- Width range: 600mm-2000mm (super wide width can be customized).
- Roll weight: 3-30 tons (cut according to customer demand).
- Surface treatment: bare plate, galvanized (zinc layer 40-275g/㎡), color coating (PVDF/PE coating).
Usage and application scenarios
- Construction: plant frame, bridge support, floor bearing plate (such as Q235B hot rolled coil).
- Automobile manufacturing: body panels, chassis parts (cold rolled deep drawn steel coils).
- Home appliance industry: refrigerator shell, washing machine inner cylinder (SPHC cold rolled coil).
- Energy equipment: wind power tower, oil pipeline (pipeline steel coil API 5L).
- Packaging field: food cans, bottle caps (tinplate tinned steel coil).
Core application area
- Construction industry: steel structure, color painted roof wall.
- Transportation: ship deck, container plate.
- Machinery manufacturing: bearings, gears, springs.
- Power energy: transformer core, transmission tower.
- Daily hardware: hardware accessories, decorative materials.
Product advantage
- Flexible specifications: Support custom thickness, width and surface treatment.
- High cost performance: taking into account strength and processing costs, suitable for large-scale procurement.
- Strong weather resistance: galvanized/color coated coil life can reach more than 20 years.
- Environmental compliance: In line with RoHS, REACH and other international environmental standards.
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Final Inspections, Occupancy Permits, And Project.
In the initial phases, architects and designers play a crucial role in conceptualizing and designing projects, ensuring they align with both aesthetic and functional requirements.
After price confirmed, FREE SAMPLE could be provided for your evaluation. After you confirm the sample details, the samples will be ready for delivery in 3-7days, and will be sent to you via express and arrive in 3-5days.1
Yes, our company mainly deals with wholesale deals, but if you insist buying one piece, or you just need one piece, we would be very likely to make the MOQ as 1 piece for you though.
Our company has been in Alibaba.com for 11 years, which is longer than most of our fellow suppliers, we've been golden suppliers for years. What's more, we've got quite a lot authority certificates, for example, BV, ISO9001, API, Alibaba onsite check cert