What are the key mechanical properties of SPCC coils?
Yield strength ≥210MPa, tensile strength 360–510MPa, elongation after fracture ≥30%, moderate hardness, and resistance to cracking during bending and stamping.
What are the weldability requirements for SPCC coils?
Low carbon composition makes them suitable for arc welding and resistance welding, resulting in stable weld formation and a small heat-affected zone, making them suitable for thin plate splicing and joint welding.
What are the surface quality requirements for SPCC coils?
The surface should be free of oxide scale, cracks, and indentations; roughness Ra≤0.8μm; straightness deviation ≤1.5mm per meter, suitable for spraying, coating, and electroplating.
What is the corrosion resistance of SPCC coils?
Their inherent corrosion resistance is average; they are prone to rusting in humid/outdoor environments. Hot-dip galvanizing (HDG), electroplating, spraying, and phosphating are required to improve corrosion resistance.
What are the suitable construction scenarios for SPCC coils?
Interior decoration, enclosure structure, and auxiliary components are not recommended for use on unprotected load-bearing parts outdoors (such as main beams and columns).