Q: What are the main chemical components of a Q235 coil?
A: It's a low-carbon steel, typically with the following values: C: 0.14%~0.22%, Si: ≤0.30%, Mn: 0.30%~0.65%, S≤0.045%, P≤0.045% (slight variations exist between different grades).
Q: Is a Q235 coil low-carbon or high-carbon steel?
A: It's low-carbon steel, with a carbon content ≤0.22%. It has good plasticity and toughness, and is easy to process.
Q: What is the core difference between a Q235 coil and a Q355 coil?
A: The core difference is in yield strength. Q355 has a yield strength ≥355MPa, indicating higher strength; Q235 has moderate strength and a more competitive price.
Q: What is the international grade corresponding to Q235 coil?
A: There is no completely equivalent international grade. It is approximately equivalent to EU S235JR and US A36, but the chemical composition and mechanical properties are slightly different and need to be verified according to customer standards.
Q: What is the delivery condition of Q235 coil?
A: It is usually delivered in hot-rolled condition (HR), with the surface in a hot-rolled oxide scale state.