Galvanized square steel tube is a high-strength, corrosion-resistant structural hollow section widely used in construction, manufacturing, and infrastructure. This product, also known as a GI hollow section or zinc square pipe, is manufactured from cold-rolled steel that is formed into a square profile and then coated with a protective layer of zinc through a hot-dip galvanizing process. This zinc coating provides exceptional defense against rust and environmental wear, making it a durable and cost-effective choice for demanding applications. ChinaCNU Steel, with over 15 years of expertise, produces premium galvanized square and rectangular tubes in Qingdao, China, exporting to global markets.
Product Specifications
Our galvanized square steel tubes are produced to meet international standards, offering a range of sizes and coatings to suit various project requirements. Below are our standard specifications.
| Grade | Thickness (mm) | Width (mm) | Zinc Coating (g/m²) | Standard |
|---|---|---|---|---|
| Q195, Q235, Q355 | 0.8 – 6.0 | 20×20 – 200×200 | Z60 – Z275 | ASTM A500, ASTM A53, JIS G3466, EN 10219 |
| Q195, Q235, Q355 | 1.0 – 5.0 | 30×20 – 150×100 | Z80 – Z275 | ASTM A500, ASTM A53, JIS G3466, EN 10219 |
Note: Custom sizes, thicknesses, and zinc coatings for galvanized rectangular tube profiles are available upon request.
Applications
The versatility and strength of galvanized square steel tube make it suitable for a wide array of industrial and commercial uses. Key applications include:
- Building & Construction: Structural frameworks, roof trusses, support columns, and fencing systems.
- Industrial Machinery: Machine frames, guard rails, conveyor system supports, and equipment bases.
- Infrastructure & Utilities: Street lighting poles, traffic sign posts, solar panel mounting structures, and greenhouse frames.
- Furniture & Decor: Modern furniture frames, retail display racks, and architectural features.
- Transportation: Trailer chassis components, vehicle frames, and cargo securing structures.
- Agricultural Equipment: Irrigation system frames, livestock pens, and storage shed frameworks.
Why Choose ChinaCNU Steel
Selecting ChinaCNU Steel as your supplier for galvanized square pipe ensures you receive quality, reliability, and professional service.
- Direct Factory Source: We are a professional steel manufacturer based in Qingdao, China, ensuring competitive pricing and quality control from production to delivery.
- International Certifications: Our operations are certified to ISO 9001 for quality management, and our materials are SGS inspected for compliance with specifications.
- Global Export Experience: With 15+ years of expertise, we have successfully exported to 80+ countries across Africa, the Middle East, Southeast Asia, and South America.
- Flexible Order Terms: We offer a manageable MOQ of 25 tons and support flexible payment methods including T/T and L/C.
- Efficient Logistics: Standard lead time is 15-25 days after order confirmation. We provide expert packing with waterproof wrapping and secure bundling for safe ocean transport.
- Technical Support: Our engineering team provides specification guidance and can develop custom solutions for specialized galvanized hollow sections.
PPGI/GI Pricing
Pricing for galvanized square steel tube is based on current raw material costs, zinc coating weight (Zinc Coating), dimensions, and quantity. As a factory, we offer highly competitive FOB Tianjin prices. For the most accurate and up-to-date quote tailored to your specific project needs—including for galvanized rectangular tube variants—please contact our sales team with your detailed requirements. We provide free quotes within 24 hours.
FAQ
What is the difference between galvanized square tube and GI hollow section?
The terms are often used interchangeably. Galvanized square steel tube specifically describes the shape, while GI hollow section (Galvanized Iron Hollow Section) is a broader technical term that can refer to square, rectangular, or other shaped tubes. Both refer to a cold-formed steel tube with a hot-dip zinc coating for corrosion protection.
What are the advantages of using zinc square pipe for outdoor structures?
The primary advantage is superior corrosion resistance. The zinc coating acts as a sacrificial layer, protecting the underlying steel from rust caused by rain, humidity, and pollutants. This makes zinc square pipe ideal for long-lasting outdoor structures like fencing, frameworks, and signage with minimal maintenance required.
Can you supply custom-sized galvanized rectangular tubes?
Yes, at ChinaCNU Steel, we have the capability to produce custom-sized galvanized rectangular tubes outside our standard range. This includes non-standard widths, heights, and wall thicknesses. Please provide your detailed drawings or specifications for a feasibility check and quotation.
What is the standard packing for export to prevent damage during shipping?
We use robust, seaworthy packing to ensure your galvanized steel tubes arrive in perfect condition. Standard packing includes waterproof plastic or craft paper wrapping, steel strapping for secure bundling, and loading onto pallets or in wooden crates for easy handling and maximum protection against moisture and physical damage.
Get Factory Price for Galvanized Square Steel Tube
Send us your specs and get a free FOB Tianjin quote within 24 hours.