Q: What is the vanadium content range in Q355 steel plate?
A: Vanadium content is generally between 0.02% and 0.15%, which refines the grain size and improves the strength and toughness of the steel.
Q: Is niobium allowed in Q355D?
A: Yes, niobium is a microalloying element that works synergistically with vanadium to further optimize the mechanical properties of the steel. The addition amount is usually ≤0.06%.
Q: What is the silicon content range in Q355 steel plate?
A: Silicon content is generally between 0.20% and 0.55%, used to improve the strength and oxidation resistance of the steel.
Q: What is the minimum yield strength for Q355 steel plate with a thickness ≤16mm?
A: Yield strength ≥355MPa.
Q: What is the tensile strength range in Q355 steel plate?
A: Tensile strength is generally between 490 and 675MPa.