What is Q235 steel?
A: Ordinary carbon structural steel (low-carbon steel), national standard GB/T 700 grade, formerly known as A3 steel.
What do "Q" and "235" mean in Q235?
A: Q = yield strength, 235 = yield strength ≥ 235 MPa (thickness ≤ 16 mm).
What carbon content range does Q235 fall into?
A: Low-carbon steel, C ≈ 0.12%～0.22% (depending on grade).
What standard does Q235 conform to?
A: GB/T 700-2006 "Carbon Structural Steel".
What are the different quality grades of Q235?
A: Grades A, B, C, and D.