Difference: usually SPCC is cold-rolled process, the surface is smooth and beautiful, and the elongation performance is good; Q235 is generally hot-rolled and the surface is relatively rough.
Uses: SPCC is widely used in many fields, such as automobile manufacturing, electrical products, rolling stock, aviation, precision instruments, food cans, etc.
Q235 is primarily used for a variety of mechanical and engineering structural parts operating at lower temperatures.
Q235 is the national standard (GB), and SPCC is the Japanese sign (JIS). Of course, the general construction materials use Q235. In fact, Q235 is not worse than SPCC, and it is common and easy to purchase.
As far as weldability is concerned, both of them are basically ordinary structural carbon steel. Therefore, it should be different from simple welding. SPCC contains less carbon than Q235. Both belong to the low-benefit range and say that they are very good in terms of weldability.
Q235 is the national standard, ordinary carbon structural steel; carbon content is less than 0.22%. Therefore, since the Japanese JIS standard is stricter than the national standard, it can be considered that the mechanical properties of the SPCC steel sheet are superior to those of the Q235 steel sheet.
