What are the mechanical properties of SPCC cold-rolled coils? What are the standard values?
Answer: According to JIS G 3141 standard, the mechanical properties of annealed SPCC are:
Tensile strength (σb): 270~410MPa;
Yield strength (σs): ≤240MPa;
Elongation (δ5): ≥28%;
The unannealed state (cold-rolled hard state) has higher strength and lower elongation.
What are the stamping properties of SPCC cold-rolled coils? What forming processes are they suitable for?
Answer: Ordinary SPCC is suitable for shallow stamping, bending, shearing, etc.; for deep drawing, SPCE or SPCEN grades should be selected. Deep drawing with SPCC is prone to cracking and wrinkling.
What are the main application areas of SPCC cold-rolled coils?
Answer: Widely used in appliance housings (refrigerator, washing machine panels), automotive parts (interior panels, brackets), hardware products (shelves, filing cabinets), electronic appliance housings, stamped parts, pipe substrates, etc. Can SPCC cold-rolled coils be welded? What are their weldability?
A: Yes, they can be welded. Due to their low carbon content, they have good weldability and are suitable for conventional welding processes such as arc welding and resistance welding. The weld joint strength is close to that of the base material, and weld cracks are not easily formed.
Can SPCC cold-rolled coils undergo surface treatments such as galvanizing and painting?
A: Yes, their smooth surface provides a good base for subsequent treatments. Common treatments include: electro-galvanizing, hot-dip galvanizing (to improve rust resistance), painting, and coating (to prevent surface scratches).