Description
Sino East Steel Group’s ERW Q195 Galvanized Square Steel Pipes (Galvanized Square Tubing) are high-strength structural hollow sections manufactured using premier cold-formed carbon steel and state-of-the-art electric resistance welding (ERW). Designed for versatility and durability, these structural pipes are widely specified for building frameworks, scaffolding, solar panel brackets, fence posts, and modern industrial machinery parts.
Technical Product Specifications
| Parameter Specification | Standards & Material Details |
|---|---|
| Standards | ASTM A500 Grade A/B, GB/T 6728, GB/T 3091, EN 10219 |
| Size Range | 15x15mm up to 200x200mm Outer Dimensions |
| Wall Thickness | 0.6 mm up to 6.0 mm |
| Base Material | Q195 Carbon Steel (Low carbon formulation for premium ductility and formability) |
| Zinc Coating Type | Pre-Galvanized (60 – 120 g/m²) or Hot-Dip Galvanized (> 220 g/m²) |
| Ends Treatment | Square cut, deburred ends (no sharp edges) |
| Fixed Length | 5.8 meter, 6.0 meter (or customized length suitable for container loading) |
| Structural Uses | Steel Scaffold frames, Greenhouse supporting arcs, Heavy Machinery frames, Warehouse storage racking, Solar tracking mounting bases |
Key Product Highlights
- Highly Ductile Q195 Steel: Excellent cold-forming capabilities and bendability prevent cracking during heavy structural loads or forming processes.
- Excellent Weldability: Low-carbon steel content is optimized for hassle-free manual welding or high-speed automated robotics welding lines.
- Tight Dimensional Tolerances: Manufactured strictly to ASTM A500 standards to ensure squareness, wall thickness, and straightness.
- Outstanding Surface Rust Prevention: Premium zinc layer (Pre-galvanized or Hot-Dip) protects the square profile from moisture and environmental degradation.
Why Choose Q195 Carbon Steel for Hollow Square Tubing?
Q195 carbon steel represents the ultimate balance of high ductility and reliable structural strength. Classified as low-carbon structural steel in China (equivalent to Grade B of ASTM standards), its premium forming characteristics make it highly favored for ERW square and rectangular tube manufacturing. Its ease of cutting, welding, and bending allows builders to customize frames quickly on-site. Sino East Steel Group protects this robust low-carbon steel profile with high-quality continuous galvanizing to guarantee maximum service life for structural and scaffolding operations.
Frequently Asked Questions (FAQ)
Q: What is the difference between pre-galvanized and hot-dip galvanized square pipes?
A: Pre-galvanized square pipes are manufactured directly from steel strips that have been galvanized beforehand, offering a smooth, silver surface with a zinc layer of 60-120 g/m² (ideal for indoor or covered structures). Hot-dip galvanized square pipes are welded first and then completely dipped into a molten zinc bath, achieving a much thicker zinc coating (> 220 g/m²) for superior outdoor corrosion protection.
Q: What custom lengths can you supply for container loading?
A: To maximize container volume, we standardly cut pipes to 5.8m (for 20ft GP containers) or 6.0m (for 40ft GP/HQ containers). However, we can also customize any length from 1.0m to 12.0m to fit your specific design requirements.
Request a Quick Wholesale Quote
Contact Tianjin Sino East Steel Group Pipe directly at [email protected]. Our engineering team will respond within 2 hours with customized wholesale pricing and logistics solutions.
Need a Quote for This Product?
Send your specs (grade, size, quantity, destination port) — our export team replies within 10 business hours with FOB pricing.
Or WhatsApp: +86 186 2208 8833
B2B Ordering FAQ
What is the MOQ for this product?
Our standard MOQ is 5 metric tons for stock sizes. Full-container orders (20ft/40ft) get the best unit price; smaller trial orders are available for new customers.
What is the delivery time?
Stock items ship within 7-10 days after deposit. Custom sizes and special coatings take 15-25 days depending on the specification.
What trade terms do you support?
We quote FOB Tianjin as standard, and also support CIF, CFR, and DDP to major ports worldwide. Payment: T/T 30% deposit + 70% against B/L copy, or L/C at sight.
Can I get a sample before bulk order?
Yes. Sample pieces are available at cost price with shipping charged to the buyer; the sample fee is deducted from the first bulk order.
Do you provide mill test certificates?
Yes, every shipment includes MTC (Mill Test Certificate) covering chemical composition and mechanical properties, plus SGS inspection on request.
