Q: What is the minimum cutting size of Q355 plate?
A: The minimum cutting size depends on the cutting method and plate thickness:
Flame cutting: minimum length/width ≥100mm
Plasma cutting: minimum length/width ≥50mm
Laser cutting: minimum length/width ≥10mmFor smaller size requirements, we can provide fine cutting services or recommend other processing methods.**
Q: Can Q355 plate be bent into a circular arc?
A: Yes. Q355 plate has good plasticity and can be bent into circular arcs of various radii. The minimum bending radius is related to the plate thickness and grade: for plates with thickness ≤10mm, the minimum bending radius is about 2 times the plate thickness; for plates with thickness >10mm, the minimum bending radius is about 3-5 times the plate thickness. For thick plates, hot bending is recommended to prevent cracking.
Q: What is the delivery state of Q355 plate?
A: The common delivery states are:
Hot-rolled state (HR): the most common delivery state, low cost, suitable for most structural parts.
Normalized state (N): the plate is heated to 900-950℃ and then air-cooled, with uniform grain size, better toughness and weldability, suitable for structural parts with higher performance requirements.
Tempered state (T): the plate is heated to a certain temperature and then cooled, with lower internal stress, suitable for precision structural parts.**
Q: What is the tolerance of Q355 plate thickness?
A: According to GB/T 3274-2017, the thickness tolerance of Q355 plate is divided into normal tolerance and precise tolerance:
Normal tolerance: for plates with thickness ≤16mm, the tolerance is ±0.5mm; for plates with thickness 16-40mm, the tolerance is ±0.8mm; for plates with thickness >40mm, the tolerance is ±1.0mm.
Precise tolerance: for plates with thickness ≤16mm, the tolerance is ±0.3mm; for plates with thickness 16-40mm, the tolerance is ±0.5mm; for plates with thickness >40mm, the tolerance is ±0.8mm.We can provide plates with precise tolerance according to customer requirements.**
Q: What is the weight calculation formula of Q355 plate?
A: The weight calculation formula of Q355 plate is:Weight (kg) = Thickness (mm) × Width (m) × Length (m) × Density (7.85 g/cm³)Example: A Q355 plate with thickness 10mm, width 2m, length 6m, its weight is 10 × 2 × 6 × 7.85 = 942 kg.