Galvanized square tubes are actually galvanized on the basis of square tubes, making the application range of galvanized square tubes much wider than that of square tubes. Galvanized square tubes are mainly used in mechanical manufacturing, curtain walls, steel construction, architecture, steel structure engineering, shipbuilding, automotive chassis, solar power generation brackets, etc. Galvanizing the surface of the square tube enhances its protective effect and corrosion resistance.

The square tube structure has high invariance, and the steel structure based on hot-rolled square tubes has the characteristics of reasonable structure, good plasticity and flexibility, and high structural stability. It is suitable for building structures with high vibration and high intrusion loads, and can resist natural disasters, especially for construction structures in earthquake prone zones. The uses of square tubes include construction, machinery manufacturing, steel construction projects, shipbuilding, solar power brackets, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automotive chassis, airports, boiler construction, and highway railings.

Performance of square tube:

1. Plasticity: Plasticity refers to the ability of a metal material to undergo plastic deformation (deformation) under load without failure;

2. Hardness: Hardness is a pointer to measure the softness and hardness of metal materials. At present, the commonly used method for measuring hardness in production is the indentation hardness method, which uses a geometric shaped indenter to press into the surface of the tested metal material under a certain load, and determines its hardness value based on the degree of pressing;

The commonly used methods include Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC), and Vickers hardness (HV);

3. Fatigue: The strength, plasticity, and hardness discussed earlier are all indicators of the mechanical properties of metals under static loads. In fact, many machine parts work under cyclic loads, and under these conditions, the parts will experience fatigue;

4. Impact toughness: The load acting on the mechanical part at a high speed is called impact load, and the ability of metal to resist damage under impact load is called impact toughness;

5. Strength: Strength refers to the ability of a metal material to resist damage (excessive plastic deformation or fracture) under static load. Due to the various forms of load action such as tension, compression, bending, and shear, strength is also divided into tensile strength, compressive strength, flexural strength, shear strength, etc. There is often a certain correlation between various strengths, and in use, tensile strength is generally used as the basic strength indicator.

Characteristics of hot-dip galvanized square tube:

1. The hot-dip galvanized square tube has a thick zinc coating, fine and uniform crystallization without pores, and good corrosion resistance;

2. The zinc layer obtained from hot-dip galvanized square tube electroplating is relatively pure, and it corrodes slowly in acid, alkali and other mist, which can effectively protect the steel substrate;

3. The hot-dip galvanized square tube zinc coating is passivated with chromic acid to form white, colored, military green, etc., which is beautiful and elegant, and has a certain decorative value;

4. Hot dip galvanized square tubes can be formed through various processes such as cold stamping, rolling, and bending without damaging the coating due to the excellent ductility of the zinc coating.

Hot dip galvanized square tube has good strength, toughness, plasticity, welding and other process properties, as well as good ductility. Its alloy layer adheres firmly to the steel base, so hot-dip galvanized square tube can be formed by various methods such as cold stamping, rolling, drawing, bending, etc. without damaging the coating; Suitable for general processing techniques such as drilling, cutting, welding, cold bending, etc. The surface of hot-dip galvanized parts is bright and beautiful, and can be directly used in engineering according to needs. Hot dip galvanized square tube has been widely used in glass curtain walls, power towers, communication grids, water and gas transmission, wire conduits, houses, bridges, metal structures, power transmission, and other fields due to its excellent performance. In recent years, it has been widely adopted.

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