| abstract |
A steel sheet is disclosed, wherein the steel sheet consists of a steel containing a specific amount of carbon, silicon, manganese, phosphorus, sulfur, nitrogen, and titanium, and the steel satisfies the conditions of the following formula:n n n (Ti * / 48) / (C / 12 + S / 32) = 1.0 to 3.0n n n Ti * = Ti-(48/14) Nn n n The steel sheet and its manufacturing method have excellent mechanical properties, formability and punching characteristics, and internally provide the steel sheet, the extract mainly consisting of Ti 4 C 2 S 2 or Ti 4 C 2 S 2 and TiS. The steel sheet is further formed of a zinc or zinc plated surface, and the surface is covered with a corrosion resistant, fingerprint resistant coating film. |