30×50×1.8 mm Galvanized Rectangular Tube
30×50×1.8 galvanized rectangular tube — the ideal lightweight structural material for frames, guardrails, and shelving applications.
30×50×1.8 mm Galvanized Rectangular Tube
30×50×1.8 galvanized rectangular tube — the ideal lightweight structural material for frames, guardrails, and shelving applications.
Specifications
| Size | 30 × 50 mm |
|---|---|
| Wall Thickness | 1.8 mm |
| Standard | GB/T 3091-2015 |
| Zinc Coating | 180 – 400 g/m² |
| Length | 6 m |
| Surface | Galvanized |
Description
Product Overview These 30×50×1.8 galvanized rectangular tubes are a preferred structural material for light-load applications. The 1.8mm wall thickness ensures lightweight construction while maintaining good structural stability.
The 30×50 rectangular cross-section design allows for easier flat surface integration and neat splicing compared to round tubes, resulting in a more compact and aesthetically pleasing structure, whether used for shelving beams, guardrail frames, or decorative joists.
Key Features - Lightweight yet strong 1.8mm wall thickness - Flat surface design for easy integration and splicing - Uniform galvanized coating for corrosion resistance - Suitable for humid outdoor and mild industrial environments
Applications - Warehouse shelving systems - Residential fencing and guardrails - Agricultural greenhouse structures - Decorative architectural frames
Galvanizing Process
Our galvanized rectangular tubes undergo a meticulous hot-dip galvanizing process. The production chain includes: 1) Alkaline degreasing at 80°C to remove fabrication oils; 2) Hydrochloric acid pickling to remove mill scale and rust; 3) Fluxing in zinc ammonium chloride solution; 4) Immersion in molten zinc bath at 445–455°C; 5) Controlled cooling and inspection. The resulting zinc coating forms a metallurgical bond with the base steel, providing cathodic protection and extended service life in outdoor environments.
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