What is special about Q235D?
A: Q235D requires -20°C impact test (≥ 27J), lowest S/P, and is special killed (TZ) steel for low-temperature environments.
7. What is the chemical composition of Q235?
A:
C: ≤ 0.22% (A/B), ≤ 0.18% (C), ≤ 0.17% (D)
Mn: ≤ 1.40%
Si: ≤ 0.35%
S/P: A: ≤ 0.050%/0.045%; B: ≤ 0.045%/0.045%; C/D: ≤ 0.040%/0.040%
8. What are the key mechanical properties?
A:
Yield Strength: ≥ 235 MPa (≤ 16mm)
Tensile Strength: 370–500 MPa
Elongation: ≥ 26% (≤ 40mm)
Hardness: ~ 120–160 HB
9. What is the density of Q235 steel plate?
A: 7.85 g/cm³ (7.85 kg/dm³).
10. What is the standard specification range?
A:
Thickness: 0.6 mm – 600 mm
Width: ≤ 4200 mm
Length: ≤ 18000 mm