1.What are the differences in material composition?
SPCC: It is an ordinary cold-rolled carbon steel sheet, the main components are carbon and manganese, the carbon content is less than 0.12%, the manganese content is less than 0.60%, and it also contains a small amount of silicon, phosphorus, sulfur and other elements.
SECC: It is an electrolytic galvanized cold-rolled steel sheet, the composition is similar to SPCC, but the surface is electrolytically galvanized and has a zinc layer, the thickness of the zinc layer is usually between 5 microns and 15 microns.
2.What are the differences in manufacturing processes?
SPCC: It is a steel plate processed by cold rolling. After rolling, it has a certain hardness, but it needs coating treatment for corrosion protection.
SECC: Based on SPCC, it has an electrolytic galvanizing process, which uses the principle of electrolysis to form a uniform and dense zinc coating on the surface of the steel plate.
3.What is the difference in appearance?
SPCC: The surface is usually black and relatively rough.
SECC: The surface is smooth, silver-gray, and has a metallic luster.
4.What are the differences in performance characteristics?
SPCC: It has good cold cutting and welding properties, and is suitable for some cold processing processes that do not require high strength, but it has poor corrosion resistance and is prone to rust.
SECC: Because of the zinc layer on the surface, it has good corrosion resistance and rust resistance, while maintaining good processing properties such as welding, painting and stamping properties.
5.What are the differences in application areas?
SPCC: It is often used to manufacture thin and light materials, such as tanks, vehicle floors, steel pipes and tabletops, and is also used for some common structural parts that do not require high corrosion resistance and focus on cost.
SECC: It is mainly used in areas with high requirements for corrosion resistance and appearance quality, such as electronic product housings, electrical appliance housings, automobile bodies, and some decorative parts in buildings.