Tianjin Tianyingtai Steel Pipe Co., Ltd. is one of the most credible manufacturers and suppliers of 75*75mm galvanized hollow section in China. Welcome to consult the quotation and import cheap 75*75mm galvanized hollow section made in China here from our factory.
| Product Name | Galvanized Hollow Section / Galvanized Square Tube |
| Shape | Square |
| Dimension | 75mm × 75mm (3" × 3") |
| Wall Thickness | 1.5mm – 6.0mm (customizable) |
| Length | 6m / 12m standard, custom cutting available |
| Material Grade | Q235B / Q345B / S235JR / S275JR / S355JR / ASTM A36 / A500 Gr.A/B/C |
| Manufacturing Process | ERW (Electric Resistance Welding) |
| Surface Treatment | Hot-Dip Galvanized (zinc coating ≥ 40–85μm) |
| Zinc Coating Standard | ASTM A123 / ISO 1461 / EN ISO 1461 |
| Ends | Plain ends, mill cut, or beveled for welding |
| Tolerance | ±0.5mm (OD), ±10% (wall thickness) per standard |
✨ Key Features & Advantages
🔹 1. Superior Structural Strength
High strength-to-weight ratio for load-bearing applications
Excellent resistance to bending, torsion, and compression
Uniform mechanical properties in all directions
🔹 2. Aesthetic & Functional Design
Clean, square profile with sharp corners
Smooth, uniform galvanized surface finish
Natural silver-gray appearance complements modern architecture
🔹 3. Easy Fabrication & Installation
Easy to cut, drill, weld, and bolt
Compatible with standard fittings and connectors
Lightweight for reduced transportation and handling costs
🔹 4. Corrosion-Resistant for Harsh Environments
Withstands humidity, rain, salt spray, and industrial pollutants
Suitable for coastal, underground, and chemical-exposed environments
500+ hours salt spray tested (ASTM B117)
🔹 5. Cost-Effective Over Lifecycle
Long service life reduces replacement frequency
Minimal maintenance = lowest total cost of ownership
100% recyclable at end of life (eco-friendly)
🔹 6. Globally Certified Quality
Compliant with ASTM, EN, JIS, AS/NZS, GB standards
ISO 9001 certified manufacturing
Third-party inspection (SGS/BV/TUV) available
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