Is SPCC prone to rust?
A: Extremely prone to rust (without protection). Surface treatment (galvanizing, painting, oiling) is required before use.
What are the common surface treatments for SPCC?
A: Electro-galvanizing/Hot-dip galvanizing (EG/HDG): Most common for rust prevention.
Painting/Powder coating/Electrophoresis: Appearance + rust prevention.
Tin plating (tinplate): Food cans.
Chromium plating/Passivation: Short-term rust prevention.
What cold working processes are suitable for SPCC?
A: Bending, folding, shallow drawing, stamping, punching, hemming, welding, cutting (all conventional sheet metal processes).
What should be noted when bending SPCC?
A: Consider springback; the bending angle needs **2~5° over-bending** compensation.
How is the weldability of SPCC?
A: Excellent. Low in carbon, sulfur, and phosphorus, suitable for spot welding, arc welding, and CO₂ welding, and not prone to cracking.