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square steel tubing


Square pipe is a name for square pipe, that is, steel pipes with equal side lengths. It is made of strip steel that has been processed and rolled. Generally, the strip is unpacked, flattened, coiled, welded to form a round tube, and then rolled into a square tube from the round tube and then cut to the required length. Usually 50 pieces per pack.

Typical Applications

Structural Steel Tube can be used for a wide variety of mechanical applications. It may be used either statically or dynamically. I’s close tolerances, good finish, and dense structure make it ideal for parts such as structural support and parts, frames, racks, trailer beds and trailer components, structural components and supports for buildings, bridges, and highways, conveyors, machine parts, guides, and supports, safety and deck rails, sign posts, athletic equipment, ornamental usages and a wide range of applications in industrial, construction, automotive, appliance, furniture and agricultural industries.



Machinability is rated at 78% of B1112. Average cutting speed 130 ft/min. This grade is easily welded by all welding processes including gas, air, and submerges arc, and the resultant welds and joints are of extremely high quality. Preheat and post-weld heating is generally not necessary.


Generally not applicable as structural steel tube is generally used in the "as supplied" condition and may be annealed or stress relieved. Annealing - May be annealed if necessary at 1600°F and slow furnace cooled. Hardens from cold working, although it will also respond to any carburizing method and subsequent heat treatments. Case hardening results in a hard case and relatively soft core. Carburize at 1650°-1700°, oil or water quench and temper at 300°. Carburizing depth is typically .060-.070".

Performance index analysis of square tube

1. Performance index analysis of square tube - plasticity

Plasticity refers to the ability of a metal material to produce plastic deformation (permanent deformation) without damage under load.

2. Performance index analysis of square tube - hardness

Hardness is a pointer to measure the degree of hardness and softness of metal materials. The most commonly used method for determining hardness in production is the indentation hardness method, which uses a certain geometry of the indenter to press into the surface of the tested metal material under a certain load to determine its hardness value according to the degree of being pressed into it.

Commonly used methods are Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC) and Vickers hardness (HV) and other methods.

Performance index analysis of square tube - fatigue

The strength, plasticity, hardness discussed earlier are the mechanical properties of the metal under static load pointer. In fact, many machine parts are working under cyclic load, in this condition parts will produce fatigue.

4. Square tube performance index analysis - impact toughness

The load acting on the machine parts at a great speed is called impact load, the ability of the metal to resist damage under impact load is called impact toughness.

5.square tube performance index analysis - strength

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What sizes does steel square tubing come in?

Square steel tubing is available in cross-sectional dimensions ranging from ½ inches per side to 24 inches per side, available in several thicknesses and several lengths.

We offer 1/2 in square steel tubing and 8x8 square steel tubing. Please contact us if you would like to know more and we will be happy to help.