Q: Can Q235 be used instead of SPCC?
A: Not recommended: Q235 has high strength, poor plasticity, and poor surface finish, making it unsuitable for stamping.
Q: What is the difference between SPCC and SECC?
A: SPCC = cold-rolled bare sheet; SECC = electro-galvanized, with better rust resistance but a higher price.
Q: What are the common defects in SPCC?
A: Rust spots, scratches, roll marks, waviness, warping, uneven thickness, inclusions, and delamination.
Q: What items must be checked when purchasing SPCC?
A: Grade, surface finish (D/B), thickness/tolerance, width, hardness, surface quality grade, and steel mill.
Q: What factors affect the price of SPCC?
A: Thickness (thinner is more expensive), surface finish (B is more expensive than D), tolerance accuracy, steel mill, coil weight, and market conditions.