Q235-A Carbon Steel Tube/Pipe
Q235-A Carbon Steel Tube/Pipe is a tubular product adhering to the Chinese national standard (GB/T 700) for general structural carbon steel. The "Q" stands for Yield Strength, and "235" indicates a guaranteed minimum yield strength of 235 MPa (for wall thicknesses ≤16 mm). The "-A" designation specifies the lowest quality grade among the Q235 classifications, allowing for less stringent control over impurities and generally not requiring impact testing. This steel offers a practical combination of moderate strength, good weldability, and desirable plasticity at a cost-effective price. Q235-A Tube/Pipe is one of the most widely used materials for general structural supports, scaffolding, low-pressure fluid pipelines, and non-critical mechanical components in construction, civil engineering, and general manufacturing where basic mechanical properties are sufficient.
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- Commodity name: Q235-A Carbon Steel Tube/Pipe
Q235-A Carbon Steel Tube/Pipe is a tubular product adhering to the Chinese national standard (GB/T 700) for general structural carbon steel. The "Q" stands for Yield Strength, and "235" indicates a guaranteed minimum yield strength of 235 MPa (for wall thicknesses ≤16 mm). The "-A" designation specifies the lowest quality grade among the Q235 classifications, allowing for less stringent control over impurities and generally not requiring impact testing. This steel offers a practical combination of moderate strength, good weldability, and desirable plasticity at a cost-effective price. Q235-A Tube/Pipe is one of the most widely used materials for general structural supports, scaffolding, low-pressure fluid pipelines, and non-critical mechanical components in construction, civil engineering, and general manufacturing where basic mechanical properties are sufficient.
Q235-A Carbon Steel Tube/Pipe Description
Applications
General Structural Tubing Construction & Scaffolding Fluid Conveyance (Non-Critical) Industrial Equipment Machinery Frames Material Handling Automotive Structural Parts Railway Components Container Manufacturing Agricultural Equipment Product Parameters
Product Name Q235-A Carbon Steel Tube / Pipe Type Seamless Tube/Pipe, Welded Tube/Pipe Outer Diameter (OD) 10mm - 2500mm (Wide Range, common for ERW/LSAW) Wall Thickness (WT) 1.5mm - 100mm (Customizable) Length 6m, 12m, or Random Length Standard GB/T 700 (Structural Steel) (Similar to ASTM A36, JIS SS400 equivalent) Surface Black Painted, Oiled, Galvanized Scope of Application General structural frames, scaffolding, fences, non-critical low-pressure fluid conveyance (water, gas), and components where high strength is secondary to low cost and good weldability. Certificate ISO, SGS, BV, LR, CCS, etc. Production Technology Hot Rolled/Cold Drawn (Seamless); ERW (Electric Resistance Welded)/SSAW/LSAW (Welded) End Finish Plain End, Beveled End Approximate grade comparison table
Standard System UNS GB/T (China) EN (Approx.) SAE/AISI (Approx.) JIS (Approx.) W. Nr. (German) Grade (Approx.) K02502 Q235A (Common Structural Steel) S235JR (1.0038) A36 STK400 St37-2 Chemical Composition
Element C (Carbon) Mn (Manganese) Si (Silicon) P (Phosphorus) S (Sulfur) Composition (wt%) ≤0.22 ≤0.30 - 0.70 ≤0.35 ≤0.045 ≤0.050 Mechanical Properties
Property Standard Requirement (GB/T) Yield Strength (ReH) (MPa) (Thickness ≤ 16mm) 235 Tensile Strength (Rm) (MPa) 370 - 500 Elongation A5 (%) 26 Impact Toughness No requirement guaranteed (Grade A) 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 -
Q235-A Carbon Steel Tube/Pipe - Stock Warehouse
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Q235-A Carbon Steel Tube/Pipe - Product Inspection
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Q235-A Carbon Steel Tube/Pipe - Product Measurement
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Q235-A Carbon Steel Tube/Pipe- Product Packaging
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