Q355 Carbon Steel Pipe refers to a type of welded or seamless steel pipe made from Q355 grade carbon steel. This material is part of the Chinese national standard GB/T 1591 series, which defines low-alloy high-strength structural steels with improved mechanical properties over common carbon steel grades.
Q355 Carbon Steel Pipe refers to a type of welded or seamless steel pipe made from Q355 grade carbon steel. This material is part of the Chinese national standard GB/T 1591 series, which defines low-alloy high-strength structural steels with improved mechanical properties over common carbon steel grades.
Composition:
Q355 carbon steel typically consists of the following elements:
- Iron (Fe): The primary component, constituting the bulk of the material.
- Carbon (C): A key alloying element that determines its strength and hardness, generally within a range lower than that of high-carbon steels to maintain good weldability and formability.
- Other alloying elements such as manganese (Mn), silicon (Si), sulfur (S), phosphorus (P), and sometimes small amounts of chromium (Cr), nickel (Ni), copper (Cu), etc., are present in controlled quantities to enhance specific properties like toughness, strength, and corrosion resistance.
Characteristics:
1. Mechanical Properties: Q355 steel pipes exhibit good mechanical strength with a yield strength of around 355 MPa (hence the name) and can withstand considerable stress under various loading conditions.
2. Weldability: It offers excellent welding performance, making it suitable for fabrication processes involving welding.
3. Formability: Although stronger than mild steel, Q355 still maintains fair cold bending and forming capabilities.
4. Corrosion Resistance: While not as corrosion-resistant as stainless steel, Q355 carbon steel has better corrosion resistance compared to plain carbon steels due to its controlled chemical composition.
5. Cost-Effectiveness: As a cost-effective alternative to more expensive alloy steels, Q355 provides a balance between strength and price.
Use:
Q355 Carbon Steel Pipes find widespread applications across several industries:
1. Structural Engineering: Used extensively in construction for load-bearing structures, bridges, columns, and beams due to their high strength-to-weight ratio.
2. Pipeline Systems: For transporting fluids, gases, and slurries in oil and gas industries, water supply systems, and sewage treatment plants.
3. Mechanical Components: Manufacturing of shafts, axles, machine frames, and other mechanical parts where strength and rigidity are essential.
4. Pressure Vessels and Boilers: In fabrication of pressure vessels, boilers, and heat exchangers due to its ability to withstand internal and external pressure.
5. Piling and Foundation Works: Used for driven piles and H-piles in civil engineering projects because of its durability and load-bearing capacity.
It's important to note that actual specifications may vary based on the manufacturing standards and the thickness of the pipe wall. Always refer to the official material data sheet or supplier documentation for detailed information about a specific Q355 carbon steel pipe product.
