Q235-A Carbon Steel Bar
Q235-A Carbon Steel Bar is solid bar stock 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 253MPa（for diametres ≤ 16mm）. The "-A" designation indicates the lowest quality level among the Q235 grades, allowing for the highest permissible levels of impurities (Sulfur and Phosphorus) and typically not requiring impact testing. This steel offers a practical combination of moderate strength, good weldability, and desirable plasticity at an economical price. Q235-A bar is widely used for manufacturing general structural supports, non-critical mechanical parts, fasteners, and basic components in construction, civil engineering, and general manufacturing where basic mechanical properties and cost-effectiveness are sufficient.
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- Commodity name: Q235-A Carbon Steel Bar
Q235-A Carbon Steel Bar is solid bar stock 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 253MPa（for diametres ≤ 16mm）. The "-A" designation indicates the lowest quality level among the Q235 grades, allowing for the highest permissible levels of impurities (Sulfur and Phosphorus) and typically not requiring impact testing. This steel offers a practical combination of moderate strength, good weldability, and desirable plasticity at an economical price. Q235-A bar is widely used for manufacturing general structural supports, non-critical mechanical parts, fasteners, and basic components in construction, civil engineering, and general manufacturing where basic mechanical properties and cost-effectiveness are sufficient.
Q235-A Carbon Steel Bar Description
Applications
Construction & Infrastructure General Structural Components Machinery Manufacturing Fastener Production Agricultural Machinery General Engineering Railway Components Material Handling Automotive Components (Non-Critical) Welded Structures Product Parameters
Product Name Q235-A Carbon Steel Bar Type Round Bar, Square Bar, Flat Bar, Angle Bar, Channel Bar Diameter / Thickness 8mm - 300mm (Customizable) Length 6m, 9m, 12m, or Random Length Standard GB/T 700 (Structural Steel Standard) (Similar to ASTM A36, JIS SS400 equivalent) Surface Hot Rolled (Black Surface), Cold Drawn, Polished Scope of Application General construction, reinforcing bars (rebar - though typically a specialized grade), foundation components, non-critical machine parts, general structural support, and agricultural tools. Certificate ISO, SGS, BV, LR, CCS, etc. Production Technology Hot Rolling, Cold Drawing End Finish Sheared, Saw Cut 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 SS400 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) (Diameter ≤ 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 Bar - Stock Warehouse
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Q235-A Carbon Steel Bar - Product Inspection
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Q235-A Carbon Steel Bar - Product Measurement
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Q235-A Carbon Steel Bar- Product Packaging
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