Select a Size
0.450
Choose from predefined sizes or select custom size for manual entry
Enter quantity between 1 and 999
Galvanized Square Tubes
Galvanized Square Tubes
Galvanized Square Tubes are steel tubes that have been hot-dipped in a zinc-rich galvanizing process to prevent corrosion and rust. This provides extended longevity in even the most challenging environments. Galvanized steel tubes are a cost-effective alternative to stainless steel for achieving rust-free protection while maintaining strength with a durable surface coating.
- A500 Grade B
- Low-carbon steel
- Hot-dip galvanized
- Excellent corrosion resistance
Overview
Galvanized square tubes are high-strength structural steel tubing protected by a hot-dip galvanizing process, making them essential for projects requiring durability and corrosion resistance. This protective zinc coating bonds metallurgically to the steel, creating a barrier that significantly extends the product's lifespan, even in harsh environments. As a cost-effective alternative to stainless steel, galvanized square tubing delivers exceptional value without compromising structural integrity.
The manufacturing process begins with the formation of high-quality steel into a square hollow structural section (HSS). The tube then undergoes a thorough cleaning process before being immersed in a molten zinc bath at approximately 850F (450C). This hot-dip galvanizing creates a uniform coating that protects the entire surface, including edges and corners, from rust and corrosion. The resulting galvanized steel tube offers a robust combination of strength and longevity.
Galvanized square tubes are versatile components used across numerous industries. Common applications include structural frameworks for buildings and industrial facilities, support systems for bridges and highway infrastructure, safety fencing and guardrails, agricultural equipment and storage systems, material handling equipment, and architectural elements like awnings and canopies. Their resistance to environmental factors makes them ideal for both indoor and outdoor use.
The primary advantage of galvanized square tubing is its exceptional corrosion resistance, which can extend service life by decades compared to uncoated steel. The galvanized coating is abrasion-resistant and provides sacrificial protection, meaning the zinc will corrode before the underlying steel, even if the coating is scratched. These tubes require minimal maintenance, reducing long-term ownership costs. They offer excellent strength-to-weight ratios and are readily available in standard sizes, facilitating faster project completion. The combination of durability, affordability, and low maintenance makes galvanized square tubes a smart choice for engineers, architects, and fabricators seeking reliable structural solutions.
Specifications
- Standards: ASTM A500 Grade B (Structural), A53, A123 (Galvanizing)
- Shape: Square Hollow Structural Sections (HSS)
- Common Sizes: 1/2" to 12" square
- Wall Thickness: 0.065" to 0.500" (16 ga to 1/2")
- Tolerances: 0.5% on outside dimensions, 10% on wall thickness (per ASTM A500)
- Lengths: Standard 20' and 40', custom lengths available
- Galvanizing Coating Weight: Typically 1.8 oz/ft to 2.5 oz/ft (ASTM A123)
- Surface Finish: Characteristic spangled zinc coating from hot-dip process
Values may vary by mill & heat; verify against the MTR for your order.
Applications
- Structural Frameworks: Building supports, mezzanines, industrial platforms
- Infrastructure: Bridge railings, highway sign supports, guardrail systems
- Architectural: Canopies, awnings, sunshades, decorative structures
- Industrial: Material handling racks, conveyor systems, machinery frames
- Agricultural: Equipment frames, greenhouse structures, storage systems
- Commercial: Retail displays, shelving units, security barriers
- Fencing & Safety: Perimeter fencing, safety cages, protective barriers
- Marine: Dock structures, boat lifts, waterfront equipment
Weldability
- Welds readily by MIG, TIG, Stick, or Flux-core processes
- Remove galvanized coating in weld area (minimum 1-2 inches from joint) for best results
- Use proper ventilation when welding galvanized steel to avoid zinc oxide fumes
- Select filler metals appropriate for galvanized steel welding
- Post-weld treatment with zinc-rich paint recommended to restore corrosion protection
How to Measure
Specify Outside Dimensions (OD) and Wall Thickness (WT) in inches or millimeters. Ordering Format: Quantity x OD x OD x WT x Length (e.g., 50 pcs x 2" x 2" x 0.120" x 20'). Tolerance Awareness: Manufacturing tolerances apply to both dimensions and wall thickness. Cutting/Fabrication: Specify if tubes require cutting to specific lengths or pre-fabrication. Certification: Request mill certification paperwork if required for your project specifications.
Order Checklist
- Dimensions (OD x OD x Wall Thickness) and required length
- Grade (e.g., A500 Grade B) and quantity (pieces or total feet)
- Cutting instructions (standard lengths or custom cuts with tolerance)
- Galvanizing specifications (coating weight, ASTM A123 compliance)
- Surface finish requirements (as-galvanized, painted over galvanizing)
- Any certifications (Mill Test Report - MTR) required for traceability
- Special handling, packaging, or delivery requirements
| Item Size & Description | Weight (lbs.)/Ft | Select Size | Qty | Price | Actions |
|---|---|---|---|---|---|
| 0.450 |
Choose from predefined sizes or select custom size for manual entry |
Enter quantity between 1 and 999 | Select a Size | ||
| 0.592 |
Choose from predefined sizes or select custom size for manual entry |
Enter quantity between 1 and 999 | Select a Size | ||
| 0.750 |
Choose from predefined sizes or select custom size for manual entry |
Enter quantity between 1 and 999 | Select a Size | ||
| 0.958 |
Choose from predefined sizes or select custom size for manual entry |
Enter quantity between 1 and 999 | Select a Size | ||
| 1.208 |
Choose from predefined sizes or select custom size for manual entry |
Enter quantity between 1 and 999 | Select a Size | ||
| 1.881 |
Choose from predefined sizes or select custom size for manual entry |
Enter quantity between 1 and 999 | Select a Size | ||
| 3.000 |
Choose from predefined sizes or select custom size for manual entry |
Enter quantity between 1 and 999 | Select a Size |
Select a Size
0.592
Choose from predefined sizes or select custom size for manual entry
Enter quantity between 1 and 999
Select a Size
0.750
Choose from predefined sizes or select custom size for manual entry
Enter quantity between 1 and 999
Select a Size
0.958
Choose from predefined sizes or select custom size for manual entry
Enter quantity between 1 and 999
Select a Size
1.208
Choose from predefined sizes or select custom size for manual entry
Enter quantity between 1 and 999
Select a Size
1.881
Choose from predefined sizes or select custom size for manual entry
Enter quantity between 1 and 999
Select a Size
3.000
Choose from predefined sizes or select custom size for manual entry
Enter quantity between 1 and 999
