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Reliable Material Quality
Selected material and controlled production support consistent performance.
Q235 Carbon Steel Coil
Q235 Carbon Steel Coil supplied for construction, structural fabrication, machinery, transportation and general engineering, with specifications and processing options available to order.
Email : chenlin@rlbsteel.cn
WhatsApp: +86 133 9518 4479
PRODUCT DETAILS
| Standard / Specification | Type / Manufacturing | Thickness Range (mm/in) | Width Range (mm/in) |
|---|---|---|---|
| ASTM A109/A109M - Cold-Rolled Carbon Strip (0.25% Max C) | Cold-Rolled (Temper rolled to specific mechanical properties) | Up to 7.6 mm (0.300 in) | Over 12.5 to 600 mm (Over 1/2 to 23-15/16 in) - Wider widths available by agreement |
| ASTM A1018/A1018M - Hot-Rolled Heavy Thickness Coils | Hot-Rolled (Direct from mill, not pickled) | 6.0 mm to 25 mm (0.230 in to 1.000 in) | Strip: Over 200 to 300 mm (Over 8 to 12 in); Sheet: Over 300 mm (Over 12 in) |
| ASTM A794/A794M - Commercial Steel (CS), Cold-Rolled | Cold-Rolled (Commercial Quality) | Typical range: 0.4 mm to 6.0 mm (0.016 in to 0.240 in) (Consult producer) | Standard cold-rolled widths (up to 1524 mm / 60 in) |
| Temper Number | Rockwell Hardness Range (HRB) | Typical Characteristics & Bending Properties |
|---|---|---|
| No. 5 (Dead Soft) | HRB 40 or less | Extremely ductile, suitable for severe forming and deep drawing. Bends flat on itself without cracking. |
| No. 4 | HRB 41 to 55 | Very ductile, suitable for severe bends and moderate drawing. |
| No. 3 | HRB 56 to 70 | General purpose, suitable for moderate forming and bending. |
| No. 2 | HRB 71 to 85 | Hard, suitable for applications requiring stiffness and flatness. Limited formability. |
| No. 1 | HRB 86 to 94 | Spring-like or full hard condition. Maximum strength and hardness. Not suitable for bending. |
| Available Edge Types (per ASTM A109) | ||
| Edge Type | Symbol | Description |
| Mill Edge | No. 1 Edge | As-rolled edge, slightly irregular. |
| Square Edge | No. 2 Edge | Edge is slit or sheared square. |
| Round Edge | No. 3 Edge | Edge is rounded by rolling. |
| Full Round Edge | No. 4 Edge | Edge is fully rounded on both corners. |
| Corner | No. 5 Edge | Edge has a slight radius (rounded corner). |
| Available Finish Types (per ASTM A109) | ||
| Finish Type | Symbol | Description |
| Natural Finish | No. 1 Finish | Dull, matte finish produced by the final cold reduction rolls. |
| Bright Finish | No. 2 Finish | Smooth, bright finish produced by polished rolls. |
| Rust-Resistant Finish | No. 3 Finish | Slightly oily surface or chemical treatment to inhibit rust. |
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Controlled Surface Finish
Surface condition and finish can be matched to fabrication and end-use needs.
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Flexible Specifications
Grade, size, tolerance and processing options are available for project requirements.
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Export-ready Supply
Inspection, documentation and protective packaging support international delivery.
20 Years Metal Export Experience
Two decades serving global buyers with reliable quality, competitive pricing, and on-time delivery.
One-stop Metal Material Solution
Carbon steel, galvanized, PPGI/PPGL, stainless, copper & brass — all grades under one roof.
Professional & Efficient Service Team
Dedicated sales engineers respond within 2 hours. Full document support for customs clearance.
OEM / ODM Custom Processing
Slitting, cutting-to-length, corrugating, and custom coating per your specifications.
Construction
Infrastructure
Automotive
Machinery
Pipe & Tube
Rail Transport
Shipbuilding
Energy
20 Years Metal Export Experience
One-stop Metal Material Solution
Professional & Efficient Service Team
OEM / ODM Custom Processing
ABOUT US
Jiangsu Ruilaibo Special Steel Co., Ltd. (RLB Steel) is a professional metal materials supplier and export partner based in Wuxi, Jiangsu, China. With over 20 years of international trade experience, we specialize in carbon steel, galvanized steel, PPGI, and stainless steel products. Our products have been supplied to customers in more than 80 countries and regions, serving industries such as construction, manufacturing, transportation, energy, and infrastructure.
Our product range includes coils, sheets and plates, pipes and tubes, bars, wires, and profiles. With reliable supply resources, professional processing capabilities, and strict quality control, we can support customized requirements for material grade, dimensions, surface treatment, coating, cutting, slitting, and packaging.
RLB Steel is committed to providing consistent product quality, competitive pricing, efficient communication, and complete export documentation. We value long-term cooperation and aim to become a dependable metal materials partner for customers worldwide.
What product information should I provide for a quotation?
Please provide the material grade, size, quantity, surface treatment, and any other special requirements.
This is my first time importing steel products. Can you help?
Yes. Our experienced team can guide you through product selection, documentation, shipping, and the entire import process.
What are your payment terms?
Our standard terms are a 30% T/T deposit and the remaining 70% before delivery. We will provide product and packaging photos before you pay the balance.
What delivery terms do you offer?
We support EXW, FOB, CFR, and CIF terms.
What are your packing terms?
Goods are generally packed in bundles or coils and secured with rods or steel straps. Customized packaging is also available upon request.
What is your delivery time?
Stock items can usually be delivered to the loading port within 7 working days after receiving the deposit. Production orders typically require 15–30 days.
Can you produce according to samples or drawings?
Yes. We can manufacture products according to your samples or technical drawings and can develop the required molds and fixtures.
Can you provide complimentary samples?
Yes. Free samples may be provided when available in stock; the buyer is responsible for shipping costs.
How do you guarantee product quality?
Our products are manufactured by qualified facilities and inspected according to applicable QA/QC standards. Inspection documentation and warranty support can also be provided when required.
