Q235 vs 45# steel?
Q235: Low carbon, good weldability, good plasticity, low strength.
45#: Medium carbon, high strength/hardness, poor weldability, can be quenched.
32. Q235 vs Q195?
Q195: Lower yield strength (195MPa), softer, cheaper, used for iron wire and thin plates.
33. Is Q235 corrosion-resistant?
Not corrosion-resistant, easily rusts in humid/acidic/alkaline environments.
34. Common rust prevention methods?
Painting, galvanizing, PVC coating, bluing, passivation, oil sealing.
35. Is Q235 magnetic?
Yes (ferromagnetic), it can be attracted by a magnet.