Q275 Carbon Steel Tube/Pipe
Q275 Carbon Steel Tube/Pipe is a tubular product adhering to the Chinese national standard (GB/T 700) for general structural steel. The "Q" stands for Yield Strength, and "275" indicates a guaranteed minimum yield strength of 275 MPa (for wall thicknesses ≤16 mm). This grade is a reliable choice for structural applications due to its good balance of moderate strength, toughness, good ductility, and excellent weldability. Q275 tube/pipe is widely used for manufacturing structural framework, scaffolding, machinery supports, and piping systems in construction, infrastructure, and general engineering where a guaranteed level of strength and reliable performance are required.
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- Commodity name: Q275 Carbon Steel Tube/Pipe
Q275 Carbon Steel Tube/Pipe is a tubular product adhering to the Chinese national standard (GB/T 700) for general structural steel. The "Q" stands for Yield Strength, and "275" indicates a guaranteed minimum yield strength of 275 MPa (for wall thicknesses ≤16 mm). This grade is a reliable choice for structural applications due to its good balance of moderate strength, toughness, good ductility, and excellent weldability. Q275 tube/pipe is widely used for manufacturing structural framework, scaffolding, machinery supports, and piping systems in construction, infrastructure, and general engineering where a guaranteed level of strength and reliable performance are required.
Q275 Carbon Steel Tube/Pipe Description
Applications
General Structural Tubing Construction & Scaffolding Machinery Frames Industrial Equipment Agricultural Machinery Material Handling Railway Components Bridge Supports (Non-Critical) Petroleum & Gas (Low-Pressure) Automotive Structural Parts Product Parameters
Product Name Q275 Carbon Steel Tube / Pipe Type Seamless Tube/Pipe, Welded Tube/Pipe Outer Diameter (OD) 10mm - 1200mm (Seamless); 10mm - 2500mm (Welded) Wall Thickness (WT) 1mm - 100mm (Customizable) Length 5.8m, 6m, 11.8m, 12m, or Random Length Standard GB/T 8162 (Structural), GB/T 3091 (Welded Fluid Pipe), GB/T 9711 (Line Pipe) Surface Black Painted, Varnished, Oiled, Galvanized Scope of Application General structure and building frames, medium-pressure fluid and gas conveyance, agricultural equipment, vehicle frames, and industrial machinery components. Certificate ISO, SGS, BV, DNV, LR, ABS, API 5L (where applicable) Production Technology Hot Rolled/Cold Drawn (Seamless); ERW/LSAW/SSAW (Welded) End Finish Plain End, Beveled End, Threaded Approximate grade comparison table
Standard System UNS GB/T (China) EN (Approx.) SAE/AISI (Approx.) JIS (Approx.) W. Nr. (German) Grade (Approx.) K03007 Q275 (Common Structural Steel) S275 (1.0044) A570 Gr. 40 STK400 St44 Chemical Composition
Element C (Carbon) Mn (Manganese) Si (Silicon) P (Phosphorus) S (Sulfur) Composition (wt%) ≤0.30 ≤1.20 ≤ 0.50 ≤0.045 ≤ 0.045 Mechanical Properties
Property Standard Requirement (GB/T) Yield Strength （ReH) (MPa) (Thickness ≤ 16mm) ≥275 Tensile Strength (Rm) (MPa) (Thickness ≤ 16mm) ≥450 - 620 Elongation A5 (%) ≥22 Impact Energy (J) (Optional) ≥20 (at 0℃) Physical Performance
Property Density (g/cm3) Modulus of Elasticity (GPa) Mean Coeff. of Thermal Expansion (10−6/deg C) (20-100 deg C) Thermal Conductivity (W/m.K) (20 deg C) Value (Approx.) ~7.85 ~200 ~11.5 ~50 -
Q275 Carbon Steel Tube/Pipe - Stock Warehouse
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Q275 Carbon Steel Tube/Pipe - Product Inspection
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Q275 Carbon Steel Tube/Pipe - Product Measurement
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Q275 Carbon Steel Tube/Pipe- Product Packaging
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