What is the tensile strength range of Q235 steel plate?
A: Regardless of the grade, the tensile strength is 375-500MPa, which is the general strength range for carbon structural steel.
Does the yield strength change for Q235 steel plate of different thicknesses?
A: Yes, the larger the thickness, the lower the required yield strength: ≤16mm≥235MPa; 16-40mm≥225MPa; 40-60mm≥215MPa; 60-100mm≥205MPa; 100-150mm≥195MPa.
What is the elongation (δ5) requirement for Q235 steel plate?
A: Elongation ≥21% (thickness ≤16mm). The elongation requirement decreases slightly with increasing thickness, ensuring the steel's plastic deformation capacity.
What are the differences in impact test requirements for different grades of Q235?
A: Q235A has no impact test requirement; Q235B has an impact energy ≥27J at room temperature (20℃); Q235C has an impact energy ≥27J at 0℃; Q235D has an impact energy ≥27J at -20℃. All impact tests use a V-notch design.
What is the hardness range of Q235 steel plate?
A: In its untreated state, the Brinell hardness (HBW) is ≤150, indicating low hardness, suitable for various cold and hot working processes.