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The galvanized square tube is a hollow square section steel pipe with a square section shape and size made of hot-rolled or cold-rolled galvanized steel strip or galvanized coil as a blank, cold-bent, and formed by high-frequency welding. , Or a galvanized rectangular tube made of cold-formed hollow steel pipe prepared in advance and then processed by hot-dip galvanizing.

Galvanizing has a stronger protective effect and strong corrosion resistance. The entire structure is made of zinc to form a dense quaternary crystal, which forms a barrier on the steel plate, thus effectively preventing corrosion factors from penetrating. The corrosion resistance comes from the strong protective function of the barrier layer of zinc. When zinc is used for sacrificial protection on the cut edges, scratches and scratches of the coating, the zinc forms an insoluble oxide layer and exerts a barrier protection function.

Since the galvanized square tube is galvanized on the square tube, the application range of the galvanized square tube has been greatly expanded compared to the square tube. It is mainly used in curtain walls, construction, machinery manufacturing, steel construction projects, shipbuilding, solar power generation brackets, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automobile chassis, airports, etc.

When speaking of steel pipe manufacturer, some people may think that this kind of manufacturer is relatively low who can only know how to produce without relevant pipe knowledge. Actually, it is not the truth. Most of the steel pipes such as welded steel pipe in the steel pipe are produced by these manufacturers. Without professional technology, how can they make these pipes? In all kinds of steel pipe, one kind is obvious that is galvanized steel pipe. Many layman may not even know what it is. However, we can know that there is a layer of zinc on the pipe surface from the pipe term. It is made from common pipe such as black steel pipe by galvanizing process. Zinc layer make the pipe has a very good insulation effect for the metal is not conductive. Because of this, the steel pipe is applied in the environment where insulation is necessary. Of course, the hot dipped galvanized steel pipe also has the same performance.

The central strength of the pipe manufacturer is the mastery of information compared with other foreign companies. For example, in the classification of steel pipe, many people just know the difference between hot galvanizing and cold galvanizing which is often mentioned. Without that, we should also know the difference between round steel pipe and square steel pipe. These two kinds of steel pipe are often used in all walks of life. After all , sometimes, the influence of pipe shape on the project is quite obvious. If not considering the shape problem in the production, we will be confused with more difficulties. Generally speaking, the price of hot galvanized square steel tube is the highest in the whole galvanized tube.

Steel pipe manufacturer should also differentiate the galvanized steel tube very clearly because nobody is more familiar with that. There are no more descriptions about identifying round steel pipe and square steel pipe. We will talk more about hot galvanizing pipe and cold galvanizing pipe. Actually, the difference between the two types of steel pipes is clear. First of all, the color of cold galvanized steel pipe is lighter than that of hot dipped galvanized steel pipe which is immersed in zinc solution directly not by plating. Then the zinc layer is thicker for hot dipped pipe. In a word, it is quite easy to identify them and hot dipped galvanized steel pipe is more prevalent all over the world.

What is steel angle iron profiles?

Steel angle, also named angle iron, or steel angle bar, is basically manufactured by hot-rolled carbon steel or high strength low alloy steel. It has L-cross shaped section with two legs - equal or unequal and the angle would be 90 degree. Structural steel angles have lots of dimensions to comply with your uses. In addition, bespoke sizes are available.

As popular structural material, angle steel is largely used in bridge building, construction and engineering. According to the steel content, angle steel can be divided into mild steel angle and HSLA steel angle.

Mild carbon steel angle contains A36, S235JR, q235, SS400, SS490, ST37.

HSLA carbon steel angle contains A572 & A588.

According to the surface treatment, angle steel has three types - black (no treatment), hot-dip galvanized and painted.

Many uses of steel angle bars:

Supporting & structural factors - bridges, warehouses, shelves, cable towers, power towers, communication towers, equipment, etc.

Everyday life uses - bed frames, chairs, benches, fencing posts, frames for supporting air conditioner, coffee tables and so on.

Structural steel is available in several shapes, including angle, beam, tee, and channel. Steel angle (also known as angle iron) is one of the world's most-used steel structural shapes due to its 90° L-shape and functional mechanical properties. Angle iron can be manufactured in steel and metal alloys in smaller bar and larger L-shape sizes.

How to Calculate the Weight of Iron Angle

How much weight can iron support? There is a simple way to calculate the weight of angle bar. Correctly calculating the weight of angle iron is vital since project parameters and specifications will dictate which steel alloy will provide the best overall advantages. In basic terms, the weight of the steel angle bar can be determined by the angle’s dimensions and density.

The steel angle weight can be determined by utilizing the dimensions of the angle iron, including the width, length, and height. Simply multiply the angle iron’s width and height and multiply that result by the iron density of 0.259. Next, take the dimensions of the tall portion of the length, multiply the width times the length time the height, and then multiply the results by iron density of 0.259. The two total weights should then be added to get the angle bar's total weight.

Steel Angle Alloy Options

Angle iron is available in several unique alloys. Each alloy provides its own quality features to deliver your project's specifications. Steel angle increases strength, weldability, and durability for construction and architectural applications. The different types of angle iron include:


Tensile strength: 58,000-80,000 psi

Yield strength: 36,000 psi

Modulus of elasticity: 29,000 ksi


Tensile strength: 49,000 psi

Yield strength: 41,000 psi

Modulus of elasticity: 27,000-30,000 ksi

Hot-Rolled Steel

Hot-rolled angle iron works well for applications requiring larger L-shaped sizes, where surface finishes and precision are unnecessary.

Cold-Rolled Steel

Cold-rolled angle iron is well-suited for applications that require tight dimensional tolerances and smooth surface finishes.

Galvanized Steel

Galvanized angle bar provides a lower-cost alternative to stainless steel, offering rust-free protection for several decades. Galvanized steel provides comparable strength and durability to that of stainless steel alloys at a fraction of the cost.

Steel Angle Shape, Thickness, and Strength Considerations

Project requirements will dictate the angle iron thickness needed for your job. The weight, force, and torsion required should be considered when determining angle iron thickness. It is essential to remember that the structural steel angle is strongest above the vertical section of the structural shape and the strength of the angle iron comes from the length of the L-shape.

Angle Iron Applications

Applications that benefit from steel angle include:

Masonryangle iron





Communication towers

Furniture frames


Small project structural repairs

The IMS Difference

What separates IMS from other metals companies? With an abundance of metal options and customer service that is second to none, IMS has you covered with the following advantages:


Next-day delivery of processed material via our trucks

Same-day pick-up in Will-Call

No minimum purchase

Support of Just-in-Time manufacturing processes

Salespeople that act as an extension of your purchasing department (we will get any metal products you need)

Material management (stocking and delivery on a scheduled basis)

Credit lines with good terms

Knowledgeable staff that knows metal

Seven stores are open six days a week (check each location for specific times)


23rd, Floors, Science and Technology Finance Buildling. No.5, Meiyuan Road, Xiqing District, Tianjin,China.


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