40x40 Gi Square Steel Tube

A 40x40 galvanized square steel tube is a versatile and durable structural component commonly used in construction, fencing, handrails, and various industrial applications. Here’s a breakdown of its key features and benefits:

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Product Introduction

40x40 GI Square Steel Tube is a hot-rolled steel tube that has been dipped into a molten zinc coating process.

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Products Description

40×40 Galvanized Square Steel Tube is manufactured by cold-forming premium hot-rolled steel strips through a high-temperature hot-dip galvanizing process. The product undergoes immersion in molten zinc at approximately 450°C, forming a dense zinc-iron alloy coating on the steel substrate that provides exceptional corrosion resistance, extending service life 3-5 times longer than conventional steel. Its surface exhibits distinctive shiny zinc crystallization patterns (industry term: "spangle"), which not only visually demonstrate product quality but also serve as crucial evidence for authenticating genuine hot-dip galvanized products.

Thickness	0.8-12mm
Length	5.5-12m
Size	20x20-500x500mm
Diameter	OD 10X10mm-400X400mm
Wall Thickness	0.6-12mm
Standard	ASTM, DIN, JIS, BS
Materials	Q195-Q345, 10#-45#, 195-Q345, Gr.B-Gr.50, DIN-S235JR, JIS-SS400, JIS-SPHC, BS-040A10
Applications	Widely used in furniture, interior decoration, fluid pipeline, petroleum and natural gas industry, drilling, pipeline, structure
Type	Steel Hollow Section

Products feature

Key Advantages

Superior Rust Resistance: Zinc layer blocks moisture and air, ideal for outdoor/humid environments

Extended Lifespan: Maintenance-free for 20-30 years, even in coastal areas
Spangle Pattern: Unique crystalline texture (indicator of process quality)
High Structural Strength: Excellent load-bearing capacity
Ease of Fabrication: Weldable and cuttable (zinc fumes require proper ventilation)

Common Applications

Construction: Steel frameworks/scaffolding

Safety Barriers: Fencing/guardrails

Warehousing Systems: Heavy-duty shelving/automated storage

Agriculture: Greenhouses/livestock enclosures

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