Square and rectangular tubes are made from a variety of materials, the most common being:
Carbon structural steel: This is one of the most widely used materials for square and rectangular tubes. It has good plasticity and toughness and can withstand certain impact loads. It is relatively inexpensive, has good processing performance, and can be welded, bent, and processed according to different needs. Common carbon structural steel grades include Q235 and Q345. Q235 has moderate strength and is widely used; Q345 has higher strength and is suitable for applications requiring higher strength.
Low-alloy high-strength steel: This is made by adding a small amount of alloying elements, such as manganese, silicon, and vanadium, to carbon structural steel, giving it higher strength and better toughness. Compared with carbon structural steel, low-alloy high-strength steel is lighter in weight for the same strength, reducing the structural weight and lowering costs. Commonly used low-alloy high-strength steel grades include Q390, Q420, and Q460, which are widely used in construction, bridges, shipbuilding, and other fields.
Stainless Steel: Stainless steel square and rectangular tubes possess excellent corrosion resistance and can be used for extended periods in various harsh environments. Common stainless steel materials include 304 and 316 stainless steel. 304 stainless steel has excellent corrosion resistance and processing performance, and is widely used in food processing, chemical, and pharmaceutical industries; 316 stainless steel, based on 304, adds molybdenum, resulting in even stronger corrosion resistance, suitable for use in harsh conditions such as marine environments and chemical media.
Aluminum Alloy: Aluminum alloy square and rectangular tubes have advantages such as low density, high strength, and corrosion resistance, while also possessing good thermal and electrical conductivity. Aluminum alloy square and rectangular tubes are commonly used in aerospace, automotive manufacturing, and electronic communications, reducing product weight and improving product performance. Common aluminum alloy grades include 6061 and 6063.
Copper Alloy: Copper alloy square and rectangular tubes possess good electrical and thermal conductivity and corrosion resistance, and are commonly used in electrical, electronic, and construction fields. There are many types of copper alloys, such as brass and bronze, each with different performance characteristics, allowing for selection based on specific needs.
In addition, there are some square and rectangular tubes made of special materials, such as titanium alloy square and rectangular tubes and high-temperature alloy square and rectangular tubes. They have special properties such as high temperature resistance, low temperature resistance, and corrosion resistance, and are suitable for specific industries and fields.
