What are the differences between stainless steel round tubes and square tubes?

1. Production differences: Round tubes are made of steel strips extruded into a round shape and then welded. The square tube is first made into a round tube and then extruded into a square tube through a die. Square tubes require one more process, so the price will be a little more expensive.
2. Differences in tube wall technology: Most of the outer walls of stainless steel round tubes are polished, while square tubes have a brushed surface. This is because the corners of square tubes are difficult to polish, and square tubes are more likely to be scratched, so having a brushed surface can reduce the presence of scratches. In order to prevent slipping, the surface of some round tubes will be frosted, and the particle size can be adjusted.
The inner wall of the round tube can be polished, and the brightness is relatively uniform. Square tubes cannot be polished due to internal structure problems. Especially the four corners are difficult to polish, and even if they are polished, they are not even enough.
3. Differences in quality control: The roundness of stainless steel round pipes is difficult to control during production and storage, and dents in the pipe body and deformation of the pipe mouth often occur, especially for thin-walled steel pipes. The four sides of the square tube are prone to indentation, and the R angle is difficult to control. This is caused by poor mold precision.
Fourth, the difference in structural stress: the surface of the round tube is more uniformly stressed; the stainless steel square tube has four 90-degree angles, which is not easy to rotate and twist, and is stronger when fixing certain objects. In home decoration products such as our doors and security windows, square tubes are generally used as frames and round tubes are used as linings. The combination of these makes the items both strong and resistant to external impacts.
5. Differences in uses: In many cases, square tubes and bent tubes can be substituted for each other, but they are different in certain circumstances. Due to the structure of the stainless steel round tube and the polishable inner wall, it is the first choice for fluid transportation; the inside of the square tube is prone to fouling and is inconvenient to clean, so it is generally not used for fluid transportation. Since the resistance moment of square tubes is greater than that of round tubes and is stronger, square tubes are often used as the main component when used as structural support.
The above is the difference between stainless steel round pipes and square pipes. Different production methods lead to different prices. Different pipe wall processes and structural stresses lead to different applications. In many cases, stainless steel round pipes and square pipes are used together, each giving full play to their advantages. You can refer to the above summary when purchasing.