Q235 steel coil anti-corrosion treatment (commonly used in construction)?
A: Rust removal (sandblasting/shot blasting) → primer (epoxy zinc-rich paint) → intermediate paint (epoxy micaceous iron oxide paint) → topcoat (polyurethane/fluorocarbon paint), or hot-dip galvanizing, to extend the service life of the building.
Q235 steel coil component deformation correction (construction)?
A: Cold straightening (mechanical/manual), temperature ≤ room temperature; hot straightening (flame heating, temperature 600-800℃), overheating is strictly prohibited, check dimensions and mechanical properties after straightening.
Q235 steel coil economic advantages in construction?
A: Simple smelting, low cost, excellent plasticity/weldability, low processing loss, and overall cost is far lower than high-strength steel, making it the first choice for cost-effectiveness in conventional construction.
When to use Q235 steel coil and when to use high-strength steel in construction?
A: For light loads, standard spans, normal temperatures, and limited budgets, choose Q235; for heavy loads, large spans, high-rise buildings, and low-temperature dynamic loads, choose Q355 and above.
What are the future trends in Q235 steel coil applications in construction?
A: It will remain a mainstream material for conventional construction; with the trend towards lightweighting and high performance, it will be used in combination with Q355 and other materials; green processing and intelligent coating will improve its adaptability and durability in construction.