SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of April, 2023 Commission File Number 1-14732 COMPANHIA SIDERÚRGICA NACIONAL (Exact name of registrant as specified in its charter) National Steel Company (Translation of Registrant's name into English) Av. Brigadeiro Faria Lima 3400, 20º andar São Paulo, SP, Brazil 04538-132 (Address of principal executive office) Indicate ...