What Is a Carbon Steel Tube?
Carbon steel tubes are steel materials used for various structural purposes in civil engineering and building construction. They are known for their earthquake resistance, high strength, and corrosion resistance and are identified with the symbol “STK”.
Uses of Carbon Steel Tubes
Carbon steel tubes are widely used in construction and civil engineering for frames, pillars, piles, landslide prevention piles, steel towers, scaffolding, and agricultural machinery. They must comply with strength regulations specific to their application, with diameters ranging from 21.7 mm to 1016.0 mm.
Types of Carbon Steel Tubes
Classification of Carbon Steel Tubes
Carbon steel tubes are categorized into five types based on their chemical composition and mechanical properties: STK290, STK400, STK490, STK500, and STK540.
- STK290: Used for light structural members due to its lowest tensile strength.
- STK400: General structure steel pipe, complying with Building Structure Calculation Standards.
- STK490: High-tensile strength steel pipe for welded structures.
- STK500: High carbon content steel pipe, mainly used for scaffolding.
- STK540: Highest tensile strength steel pipe, important for weldability.
Classification by Manufacturing and Finishing Method
- Specified Manufacturing Method: Seamless, electric resistance welding, forge welding, and automatic arc welding.
- Specified Finishing Methods: Hot finishing, cold finishing, electric resistance welded as welded.