Square tubes are a type of square-shaped tubular material, specifically steel tubes with equal side lengths. They are manufactured by rolling steel strips through a specialized process. Steel tubes have become an indispensable material in construction and interior decoration. Square tubes are also widely used in interior decoration, but it is important to first understand the dimensions of square tubes and familiarize yourself with the common sizes available, as this will assist you in making an informed purchase.

What are square tubes?

Square tubes, as their name suggests, are tubular structures with square cross-sections. Various materials can be used to form square tubes, depending on their intended use and application. Most square tubes are made from steel tubes, which are first unpacked, flattened, rolled, and welded into round tubes. These round tubes are then rolled into square tubes and cut to the required length. Generally, there are 50 pieces per package. In terms of stock availability, larger sizes are more common, ranging from 10x10x0.8-1.5 to 500x500x10-25. Square tubes are categorized by application into structural square tubes, decorative square tubes, construction square tubes, and mechanical square tubes, among others.

A square tube is a lightweight, thin-walled steel tube with a hollow square cross-section, also known as steel cold-formed profiles. It is manufactured by cold-bending and welding Q235 hot-rolled or cold-rolled steel strips or coils into a square cross-section shape, followed by high-frequency welding. For hot-rolled thick-walled square tubes, except for increased wall thickness, the corner dimensions and edge straightness meet or exceed the standards of resistance-welded cold-formed square tubes.

Features and Applications of Square Tubes

1. Square Tube Product Description

Square tubes are hollow square-section lightweight thin-walled steel tubes, also known as steel cold-formed profiles. They are manufactured using Q235 hot-rolled or cold-rolled steel strips or coils as raw material, which are cold-bent into shape and then welded using high-frequency welding to form square-section steel with specified dimensions. Except for the increased wall thickness, the corner dimensions and edge straightness of hot-rolled thick-walled square tubes meet or even exceed the standards of resistance-welded cold-formed square tubes. They have excellent comprehensive mechanical properties, weldability, cold and hot processing performance, corrosion resistance, and good low-temperature toughness.

1. Applications of square tubes

Square tubes are used in various projects such as construction, mechanical manufacturing, steel construction, shipbuilding, solar power generation supports, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automobile chassis, airports, boiler construction, highway guardrails, building construction, pressure vessels, oil storage tanks, bridges, power plant equipment, lifting and transportation machinery, and other welded structural components with higher load requirements.

Methods for Identifying Square Tubes

With the development of the economy, counterfeit products have become increasingly prevalent in society. To avoid being deceived when purchasing square tubes, it is essential to understand how to distinguish between genuine and counterfeit products: We can assess the quality of square tubes by observing their surface smoothness and flatness. If the surface is relatively flat, it indicates that the tube is of good quality. Conversely, if the surface is uneven and the dimensions and thickness are irregular, it suggests that the tube is of poor quality."

Square Tube Weight Calculation Formulas

Square tube weight calculation formula: 4 × wall thickness × (side length – wall thickness) × 0.00785

Circular Tube Weight Calculation Formula: {(Circumference ÷ 3.14) - Wall Thickness} × Wall Thickness × 0.02466

(Note: The units above are kg/m, where wall thickness and side length are measured in millimeters (mm).)

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