304 stainless steel square tube is a name for stainless steel square tube, that is, a steel tube with the same side length, which is a long steel with no welds around the hollow section. It is made of strip steel through process treatment. Generally, the strip steel is unpacked, flattened, crimped, and 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 a pack of 50.
Stainless steel rectangular tube. Pipelines for conveying fluids: pipelines for oil, natural gas, gas, water and some solid materials, etc. Compared with solid steel such as stainless steel round pipes, stainless steel square pipes are lighter in weight under the same bending and torsion. Steel scaffolding used in our country, etc. Manufacturing ring parts with stainless steel square tubes can improve material utilization, simplify manufacturing processes, save materials and processing.
● Most stainless steel pipes are round pipes. There are also certain restrictions. For example, in the case of plane bending, the bending strength of the round tube is not as good as that of the square tube and the rectangular tube. Some tank equipment supports, steel and wood furniture, etc. often use square and rectangular pipes.
● Stainless steel square tube materials are: 304, TP304, 316, TP316L, 2205 and other special materials. For example, 304 stainless steel rectangular pipes produce steel pipes with equal side lengths. It is made of strip steel through process treatment. Rust resistance is stronger than 200 series stainless steel materials. High temperature performance is also good.
It has excellent stainless steel corrosion resistance and better resistance to intergranular corrosion. For oxidizing acids, experiments have found that in nitric acid below the boiling point and concentration ≤ 65%, it also has good corrosion resistance to alkaline solutions and most organic and inorganic acids.
● The square tube can be divided into seamless and welded. It is extruded from a seamless round tube. When the circular section is subjected to internal or external radial pressure, the seamless square tube is formed when the force is relatively uniform.
1. Analysis of performance indicators of square tubes - plasticity
Plasticity refers to the ability of metal materials to undergo plastic deformation (permanent deformation) under load without damage.
2. Analysis of square tube performance indicators - hardness
Hardness is a pointer to measure the softness and hardness of metal materials. The most commonly used method for measuring hardness in production is the indentation hardness method, which uses an indenter with a certain geometric shape to press into the surface of the metal material to be tested under a certain load, and determines the hardness value according to the following formula: degree of indentation.
Commonly used methods are Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC) and Vickers hardness (HV).
United Steel Industry As the most important steel pipe manufacturer and exporter in China, in the past 20 years, we have completed more than 100 projects, with partners in more than 100 countries, and established relationships with oil and gas and EPC companies in many countries business relationship.
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