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.
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.
The versatility and strength of galvanized square steel tube make it suitable for a wide array of industrial and commercial uses. Key applications include:
Selecting ChinaCNU Steel as your supplier for galvanized square pipe ensures you receive quality, reliability, and professional service.
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 Qingdao 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.
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.
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.
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.
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.
Send us your specs and get a free FOB Qingdao quote within 24 hours.
