The Use Of Square Tube

The square tube also known as square and rectangular cold-formed hollow steel referred to as square tube and rectangular tube.

1. The allowable deviation of the wall thickness of the square tube and rectangular tube shall not exceed plus or minus 10% of the nominal wall thickness when the wall thickness is less than 10mm and shall be less than 8% when the wall thickness is greater than 10mm. With the exception of wall thickness.

2. The standard delivery length for the square tube is 4000 mm-12000 mm, with the most common lengths being 6000mm and 12000mm. The square tube and rectangular tube can deliver short-length and non-fixed-length products up to 2000mm in length, and they can also be delivered as an interface tube, but the buyer must cut off the interface tube when using it. The weight of short-length and non-fixed-length products must not exceed 5% of the total delivery quantity, and the weight of the square tube and rectangular tube with a theoretical weight greater than 20kg/m must not exceed 10% of the total delivery quantity.

3. The curvature of the square tube must not exceed 2mm per meter, and the total curvature must not exceed 0.2% of the total length.

Application areas:

Widely used in the manufacturing of machinery, construction, the metallurgical industry, agricultural vehicles, agricultural greenhouses, the automotive industry, railways, highway guardrails, container skeletons, furniture, decoration, and steel structures.

Steel furniture is used in engineering construction, glass curtain wall, door, and window decoration, steel structures, guardrails, machinery manufacturing, automobile manufacturing, home appliance manufacturing, shipbuilding, container manufacturing, electric power, agricultural construction, agricultural greenhouse, bicycle rack, motorcycle rack, shelf, fitness equipment, Leisure and tourism products, steel furniture, various specifications of oil casing, oil pipe and line pipe, water, gas, and electricity.

To measure the square tube:

Hardness is an indicator to measure the hardness of metal materials. The most commonly used method for measuring the hardness of rectangular tubes in production is the indentation hardness method. The surface of the material is tested for its hardness value according to the degree of indentation.