Specification for rectangular steel tubes
The specification of rectangular steel pipe mainly includes two aspects: size and material.
1. scale
Generally, the dimensions of rectangular steel pipes are determined according to their external dimensions and wall thickness. Common sizes are 20*30mm, 30*40mm, 40*50mm, 50*60mm and 60*80mm, and the wall thickness is generally 1.5mm, 2.0mm, 2.5mm and 3.0mm..
2. Materials
The material of rectangular steel pipe is generally carbon steel, alloy steel, etc. The main components of carbon steel rectangular pipe are iron and carbon, which have good weldability and mechanical properties. Alloy steel rectangular pipe is made by adding other elements, such as chromium, molybdenum and cobalt, on the basis of carbon steel. To improve its corrosion resistance, strength and hardness.
Application of rectangular steel tube
Rectangular steel pipes are widely used. The following are some common application fields.
1. Building field
Rectangular steel pipes are often used to make steel structures, steel frames, steel pipe scaffolding and so on in the construction field. Rectangular steel tube has the characteristics of strong bearing capacity, corrosion resistance and easy processing, which can meet various requirements of building structures.
2. The field of machinery manufacturing
In the field of mechanical manufacturing, rectangular steel pipes are often used to make machine tools, mechanical parts, conveying equipment and so on. Rectangular steel tube has good mechanical properties and machinability, which can meet various requirements of mechanical manufacturing.
3. Aerospace field
In the aerospace field, rectangular steel pipes are often used to manufacture aircraft parts and missile parts. Rectangular steel tube has good strength and hardness, which can meet various requirements in aerospace field.
Machining of rectangular steel pipe
Rectangular steel pipes need to be processed before use. The following describes the processing steps of rectangular steel pipes.
1. Cut
Rectangular steel pipes are generally cut by flame cutting, plasma cutting and wire cutting. When cutting, it needs to be adjusted according to actual needs to ensure the cutting quality.
weld
Usually, rectangular steel pipes are welded by arc welding and gas shielded welding. When welding, pay attention to welding temperature, welding speed and other parameters to ensure welding quality.
polish
Polishing rectangular steel pipe can improve its surface smoothness and aesthetics. When polishing, it is necessary to choose appropriate grinding tools and grinding fluids in order to achieve the ideal polishing effect.