Q: What are the non-destructive testing standards for Q235?
A: Welded joints shall be tested according to GB/T 11345 (ultrasonic) and GB/T 3323 (radiological).
Q: What is the sampling quantity for mechanical property tests of Q235?
A: Tensile and bending tests: 1 sample/batch; Impact tests: 3 samples/batch (B/C/D grade).
Q: How to store Q235 for rust prevention?
A: Store in a dry, well-ventilated indoor environment, elevate to prevent moisture, apply rust-preventive oil, and avoid contact with acids and alkalis.
Q: What are the precautions for transporting Q235 steel?
A: Securely bundle to prevent deformation, avoid rain and seawater corrosion, and protect thick plates from impact.
Q: What are the surface treatment methods for Q235?
A: Sandblasting for rust removal, pickling and phosphating, applying primer/topcoat, hot-dip galvanizing, etc., selected according to the usage environment.