Q235 Impact Energy Standard?
B: 20℃, C: 0℃, D: -20℃, V-notch ≥27J.
Q235 Sulfur and Phosphorus Upper Limits?
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%
Can Q235 be used at low temperatures (below -20℃)?
Q235D must be used; A/B/C are not suitable for long-term stress at -20℃.
What is the difference between Q235 and SS400 (Japanese Standard)?
SS400 is graded by strength, yield strength is not guaranteed, performance is close to Q235 but there are no impact requirements.
Q235 Selection Principles (Summary)?
For general static load structures/welded parts: select Q235B
Around 0℃: select Q235C
-20℃ extreme cold: select Q235D
For those seeking low cost and easy processing: select Q235A