Stainless steel square tube steel rectangular tube seamless square tube welded square tube flat strip Description: stainless steel tube is a hollow steel bar, so called because the section is a square square tube. A large number of pipelines for transporting fluids, such as oil, natural gas, water, gas, steam, etc. In addition, engaged in bending, torsional strength, lighter weight, so it is widely used in the manufacture of mechanical parts and engineering structures. Category: stainless steel tube Category: Square seamless and welded steel pipe points (pipe joints) two categories. Press the cross-sectional shape can be divided into square and rectangular tube, round steel widely used, but there are some semi-circular, hexagonal, equilateral triangle, octagonal shaped steel tubing. For stainless steel to withstand the fluid pressure in the hydraulic tube must withstand the test of capacity and quality, the leak does not occur at a predetermined pressure, wet or expansion of qualified, some steel but also according to the standard requirements or demand side volume side test, flaring test, flattening test. Square tube specifications: 5 * 5 ~ 150 * 150 mm Thickness: 0.4 ~ 6.0 mm square tube material: 201,202,304,304L, TP304, TP316L, 316,316L, 316Ti, 321,347H, 310S production process: a. Round preparation; b. Heating; c. Hot punch; d. Cutting head; e. Pickling; f. Grinding; g. Lubrication; h. Cold working; i. Degreasing; j. Solution heat treatment; k. Straightening; l. Pipe cutting; m. Pickling; n. Finished product inspection. Corrosion resistance and performance analysis: metals can react in the atmosphere to form an oxide film on the surface with oxygen, iron oxide formed on ordinary carbon steel will continue to oxidation, corrosion continues to expand, eventually forming holes. This can paint or oxidation-resistant metal plating to protect the steel surface, but this protective layer is only a film, if the protective layer is damaged, the following steel began to rust right again. When the stainless steel pipe is rusted steel chromium content related to steel 12% chromium content in the atmosphere, stainless steel passivation layer formed on the surface, dense chromium-rich oxide and protect the surface, to prevent further re-oxidation. This oxide layer is very thin, it can be seen through the natural sheen of steel surfaces of stainless steel has a unique surface. If the chromium film, once destroyed, chromium steel with atmospheric oxygen to regenerate the passive film, continue to play a protective role. In some special circumstances, stainless steel and failure will occur some localized corrosion, stainless steel and carbon steel but different, and failure does not appear uniform corrosion, corrosion allowance therefore does not make sense for the stainless steel tube.