How many grades are there for Q235?
There are four grades: A, B, C, and D (Grade E is rarely used).
What is the carbon content range for each grade?
A: 0.14~0.22%
B: 0.12~0.20%
C: ≤0.18%
D: ≤0.17%What are the differences in sulfur (S) and phosphorus (P) content?
A: S≤0.050%, P≤0.045%
B: S≤0.045%, P≤0.045%
C: S≤0.040%, P≤0.040%
D: S≤0.035%, P≤0.035%
What are the main alloying elements?
Mainly C, Mn, and Si.
Residual: Cr, Ni, Cu≤0.3%
What are the deoxidation methods?
A/B: Rimmed steel (F), Semi-killed steel (b) C/D: Killed steel (Z), Special killed steel (TZ)