Must-Read for Buyers! How to Quickly Identify the Quality of Q235B Steel Plates?
Q235B is a carbon structural steel, conforming to standards GB/T 700-2006 and GB/T 3274-2017, formerly designated C3. In its designation, "Q" represents the yield strength, "235" indicates a lower limit of 235 MPa, and "B" signifies a grade B killed steel. Its chemical composition includes elements such as C≤0.20%, Mn≤1.4%, Si≤0.35%, P≤0.045%, and S≤0.045%, exhibiting good plasticity, toughness, and weldability. Carbon steel plate applied in machinery manufacturing industry When purchasing Q235B steel plates, you can quickly identify their quality by checking the following aspects: I. Quick Check of Core Indicators Chemical Composition: Carbon (C) ≤0.20%, Sulfur (S), Phosphorus (P) ≤0.045%, Manganese (Mn) ≤1.40%. Mechanical Properties: Yield Strength ≥235MPa, Tensile Strength 370-500MPa, Elongation after Fracture ≥26% (Thickness ≤16mm). Impact Test: Impact Absorption Energy at...