What is the chemical composition of Q235?
A:
C: 0.14–0.22% (A/B); ≤0.18% (C); ≤0.17% (D)
Mn: 0.35–0.80%
Si: ≤0.30%
S: ≤0.045% (A/B); ≤0.040% (C); ≤0.035% (D)
P: ≤0.045% (A/B); ≤0.040% (C); ≤0.035% (D)
7. What is the yield strength of Q235?
A:
≤16mm: ≥235 MPa
16–40mm: ≥225 MPa
40–60mm: ≥215 MPa
8. What is the tensile strength of Q235?
A: 375–500 MPa.
9. What is the elongation of Q235?
A: ≥26% (≤16mm); ≥25% (16–40mm).
10. What is the impact energy of Q235?
A: ≥27 J (V-notch, B/C/D grades).