Description of Rectangular Pipe Q195 Rectangular pipe Q195 is a type of carbon steel structural pipe with a rectangular cross-section, widely used in construction, machinery, and industrial applications due to its excellent mechanical properties and cost-effectiveness. Made from Q195 steel, this material offers good strength, weldability, and formability, making it suitable for various structural and fabrication purposes. Material Properties Q195 is a low-carbon steel grade with a carbon content typically below 0.12%, ensuring good ductility and ease of processing. Its yield strength ranges from 195 MPa to 215 MPa, while the tensile strength is approximately 315 MPa to 430 MPa. The elongation rate is around 33%, indicating good deformation resistance. Additionally, Q195 steel exhibits decent corrosion resistance, though surface treatments like galvanization or painting may be applied for enhanced durability in harsh environments. Manufacturing Process Rectangular pipes are produced through either cold-forming or hot-rolling processes. Cold-formed pipes are made by bending and welding steel strips into shape, resulting in precise dimensions and smooth surfaces. Hot-rolled pipes are formed at high temperatures, offering higher strength but with slightly less dimensional accuracy. Both methods ensure structural integrity and uniformity in wall thickness. Applications Due to its lightweight yet sturdy nature, rectangular pipe Q195 is commonly used in: - Construction: Frameworks, support beams, and scaffolding. - Furniture: Metal frames for tables, shelves, and cabinets. - Automotive & Machinery: Chassis components, brackets, and conveyor systems. - Infrastructure: Guardrails, signage structures, and fencing. Advantages - High Strength-to-Weight Ratio: Provides structural stability without excessive weight. - Easy Fabrication: Can be cut, welded, drilled, and bent with standard tools. - Cost-Effective: More affordable than stainless steel or aluminum while maintaining sufficient durability. - Versatility: Available in various sizes (e.g., 20×10 mm to 200×100 mm) and thicknesses (1.2 mm to 6 mm). Standards & Quality Control Rectangular pipe Q195 complies with international standards such as GB/T 6728 (China) and ASTM A500 (USA). Quality checks include dimensional inspections, tensile tests, and surface defect assessments to ensure reliability. Conclusion Rectangular pipe Q195 is a practical and economical choice for structural applications, balancing performance, ease of use, and affordability. Its adaptability across industries makes it a preferred material for engineers and fabricators worldwide.