Q235 Galvanized Steel Roofing Sheet
- Alloy or Not: Non-alloy
- Technique: Cold Rolled
- Type: Corrugated, Tile, Flat, Trapezoidal, Standing Seam, etc.
- Galvanization: Hot-dip, Electro, Pre
- Processing Service: Roll Forming, Cutting, Punching, Bending, Coating, etc.
- Certification: ISO 9001, CE
- Inspection: SGS, TUV, Factory Inspection
- Origin: Hubei/Henan/Jiangsu, China
- Port: Qingdao, Tianjin, Lianyungang
- MOQ: 5 tons (or as per negotiation)
- Delivery Time: 8-14 Days
- Payment: T/T, L/C
Product Detail
Q235 galvanized steel roofing sheets are made from strong, durable Q235 carbon steel and then coated with zinc for extra protection. This zinc layer helps prevent rust and corrosion, making it a great option for outdoor use, especially in areas with harsh weather. Whether it’s for residential, commercial, or industrial buildings, this roofing is not only cost-effective but also reliable against rain, snow, and wind. It’s lightweight, yet sturdy, and it requires less maintenance since it lasts longer.
We can provide corrugated, tile, flat, trapezoidal, and standing seam type Q235 galvanized/galvalume steel roofing sheets. Thickness 0.125-4.0 mm with coating weight ranging from Z/ZA30-275 g/m². Soft, half-hard, and full-hard roofing sheets are available, and we can also produce regular spangle, minimized spangle, zero spangle, and big spangle. Our standard 3-layer export package: plastic film in the first layer, kraft paper in the second layer, and galvanized sheet+bundle strip+corner protector in the third layer, or according to your requirement. Most can be customized, and we are very capable of doing so for our customers.
Contact us if you are unfamiliar with this product or have unanswered questions.
Features
Q235 galvanized steel roofing sheets could bring the following benefits to your project:
- Long-Lasting – Durable, so you don’t have to worry about frequent replacements.
- Low Maintenance – Keeps looking good without constant upkeep.
- Weatherproof – Stands up to rain, moisture, and rust—good for all climates.
- Strong but Lightweight – Tough enough to last, light enough to install easily.
- Earthquake and Fire Safe – Built to handle shaky ground and fire safety needs.
- Color Choices – Comes in a variety of colors to fit any style.
Applications
Construction
Residential roofs, commercial building roofs, industrial facility roofs, and garage roofing.
Agriculture
Barn roofing, greenhouse roofing, storage facility roofs, and animal shelter roofs.
Energy/Utilities
Power plant roofing, wind farm control buildings, substation covers, and oil refinery structures.
Transportation
Train station roofs, bus stop shelters, airport hangars, and vehicle storage facilities.
Manufacturing
Factory roofing, warehouse roofs, machine shop shelters, and assembly line covers.
Retail
Shopping mall roofing, storefront canopies, warehouse outlets, and car park shelters.
Product Parameters
| Parameter | Details |
|---|---|
| Standard | GB/T 700, GB/T 2518, GB/T 12754, GB/T 4947, ISO 4992, ASTM A653, EN 10346, ASTM A123, JIS G3302, etc. |
| Base Material | Galvanized steel sheet; Galvalume steel sheet; PPGI steel sheet; PPGL steel sheet |
| Material Grade | Q235A, Q235B, Q235C, Q235D |
| Thickness | 0.125-4.0 mm, or as requested |
| Width | 660-1500mm, or as requested |
| Length | 1-3.5 m, or as requested |
| Tolerance | T: ±0.02mm; W: ±2mm |
| Z/ZA Coating | 30-275 g/m², or as requested |
| Surface Treatment | 1) Galvanized 2) Pre-Painted/Color Coated (PE, HDP, PVDF, SMP, etc.) 3) Galvalumed 4) Powder Coated (PE, PU, etc.) 5) Oiled 6) Phosphated 7) As requested |
| Hardness Condition | Soft, Half-Hard, Full-Hard |
| Spangle | Regular spangle, Minimized spangle, Zero spangle, Big spangle |
| Testing Method | VI, DM, GCTT, TST, CRT, BT, etc. |
| Application | Commercial building roofs, industrial facility roofs, barn roofing, storage facility roofs, power plant roofing, substation covers, train station roofs, airport hangars, factory roofing, warehouse roofs, shopping mall roofing, car park shelters, etc. |
| Certification | Approved by ISO 9001, CE |
| Packaging | Standard seaworthy packing, or as requested |
*Testing Method: VI – Visual Inspection, DM – Dimension Measurement, GCTT – Galvanized Coating Thickness Testing, TST – Tensile Strength Testing, CRT – Corrosion Resistance Testing, BT – Bending Test
Material Specifications
Chemical Composition
| Steel Grade | Quality Grade | C % (≤) | Si % (≤) | Mn % (≤) | P % (≤) | S % (≤) |
|---|---|---|---|---|---|---|
| Q235 | Q235A | 0.22 | 0.35 | 1.4 | 0.045 | 0.05 |
| Q235B | 0.2 | 0.35 | 1.4 | 0.045 | 0.045 | |
| Q235C | 0.17 | 0.35 | 1.4 | 0.04 | 0.04 | |
| Q235D | 0.17 | 0.35 | 1.4 | 0.035 | 0.035 |
*According to GB/T 700-2006.
Mechanical Properties
| Thickness (mm) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Impact Absorbed Energy KV2 (J) |
|---|---|---|---|---|
| ≤16 | 370-500 | ≥235 | ≥26 | ≥27 |
| >16 ~ 40 | 370-500 | ≥225 | ||
| >40 ~ 60 | 370-500 | ≥215 | ≥25 | |
| >60 ~ 100 | 370-500 | ≥215 | ≥24 | |
| >100 ~ 150 | 370-500 | ≥195 | ≥22 | |
| >150 ~ 200 | 370-500 | ≥185 | ≥21 |
*According to GB/T 700-2006. Test temperatures of Impact Absorbed Eenergy are 20℃, 0℃, -20℃.
Why Choose Us
Consistent Quality
We address your primary quality concerns with Q235 galvanized steel roofing sheets — such as coating uniformity, potential missed spots, and coating adhesion — through continuous hot-dip galvanizing processes & strict control of temperature and timing, non-destructive thickness testing with magnetic gauges, and multi-step-pre-treatment, including acid cleaning and surface preparation, to ensure consistent performance, corrosion resistance, and long-lasting durability across various environments.
Precise Dimensions
We guarantee the dimensional accuracy of our Q235 galvanized steel roofing sheets, maintaining tight tolerances within ±0.02 mm through precision equipment and ISO 9001-certified processes. Every batch undergoes 100% inspection, with zero deviation complaints in the past 5 years. We ensure smooth project execution without installation delays.
Stable Supply
We have 3 factories with a combined annual capacity of over 500,000 tons and cooperation relationships with many top steel manufacturers in China, such as Baowu, Shagang, HBIS, etc. In the event of any unforeseen circumstances, we can coordinate across factories to ensure stable production and on-time delivery.
Stable & Competitive Pricing
We maintain upstream raw material suppliers with price-lock agreements in place to effectively manage material cost fluctuations. Also, considering that our clients may face pressure from market changes, we will try our best to offer reasonable discounts to both new and existing clients.
Secure Packaging & Shipping
Packaging can be customized according to your requirements. We provide transparent, real-time photos of the packaging and loading process for your verification. You can also choose your trusted freight forwarder for transportation to ensure the entire logistics process is secure and reliable.
About Us
Founded in 1999, SteelPRO Group operates three factories with a combined annual production capacity of over 500,000 tons. We specialize in manufacturing a wide range of steel products, including round steel, profiles, plates, and pipes. Our portfolio encompasses low-alloy structural steel, tool steel, special steel, and more.
With strict adherence to global standards such as GB, ASTM, DIN, EN, and JIS, we ensure high-quality products, including heat-treated, machined, and prestressed steel. Our solutions are trusted by customers in diverse industries, and we proudly export to different countries across Europe, North America, and Asia.
At SteelPRO, we are dedicated to delivering tailored steel solutions and growing alongside our dear clients.
Certification
FAQ
What are your prices?
Our prices are subject to change depending on supply and market conditions. For an accurate and up-to-date quote, please contact our sales team directly.
Can you provide relevant documentation?
Yes, we can provide a wide range of documentation, including Certificates of Analysis/Conformance, Insurance, Certificates of Origin, and any other required export documents.
What is the average lead time?
As per mass production, the lead time is 5-20 days after:
1) we have received your deposit; 2) we have received your final confirmation on your orders.
If our lead time doesn’t meet your deadlines, please contact our sales directly in advance in case of any potential issues. We will try to accommodate your needs in all cases, and we are able to do so in most cases.
Can you provide free samples?
Yes, we can provide free samples for quality evaluation. However, shipping costs are generally covered by your company.
Can I visit your factory?
Of course! You are welcome to visit our factory. Please contact us in advance to arrange a convenient time for your visit, and we will gladly organize a tour and provide any necessary information to ensure a productive visit.
Our Service
SteelPRO Group – manufacturer and solution provider for special steel, offering multi-industry application solutions and customised services, 100% quality free, accompanying customers in their growth!
Our Quality Control
- Roundness
- Tolerance
- Microstructure
- Non-Destructive Testing
- Destructive Testing
- Process Control
Service Integration Processing
- Welding
- Metal Fabrication
- CNC Machining
- Lathe
- Forming
