What does Q235 stand for?
A: Q means yield strength; 235 means the minimum yield strength is ≥235 MPa (when thickness ≤16 mm). It is a Chinese standard carbon structural steel.
2. What is the standard for Q235 steel plate?
A: It is produced according to GB/T 700-2006 Carbon Structural Steels.
3. What are the quality grades of Q235 steel plate?
A: Four grades: Q235A, Q235B, Q235C, Q235D, differing in impact toughness and impurity limits.
4. What is the most commonly used grade?
A: Q235B is the most widely used for general engineering structures.
5. What is the chemical composition of Q235B?
A: C ≤0.20%, Si ≤0.35%, Mn ≤1.40%, S ≤0.045%, P ≤0.045%.