6-K

UNITED STATES

SECURITIES AND EXCHANGECOMMISSION

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 February2024

Commission File Number1-14732

COMPANHIA SIDERÚRGICANACIONAL

(Exact name of registrantas specified in its charter)

National Steel Company

(Translation of registrant’sname into English)

Av. Brigadeiro Faria Lima3400, 20th FloorSão Paulo, SP, Brazil04538-132

(Address of principal executiveoffice)

Indicate by check mark whether the registrant files or will file annual reports

under cover Form 20-F or Form 40-F.

Form 20-F ___X___ Form 40-F _______

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes _______ No ___X____

Announcement of CSN Resources S.A.’s Pricingof US$200.0 Million of 8.875% Notes Due 2030

São Paulo, February 8, 2024 – Companhia SiderúrgicaNacional (“CSN”) (NYSE: SID) announces that its Luxembourg finance subsidiary, CSN Resources S.A., priced a re-tap offering of US$200.0 million in aggregate principal amount of 8.875% senior notes due 2030 (the “Notes”), guaranteed by CSN, offered pursuant to exemptions from registration under Rule 144A and Regulation S under the U.S. Securities Act of 1933, as amended (the “Securities Act”). The Notes were offered as a further issuance of and will be consolidated and form a single fungible series with CSN Resources S.A.’s 8.875% notes due 2030 issued in an aggregate principal amount of US$500.0 million on December 5, 2023. The total aggregate principal amount of notes of this series that will be outstanding following this re-tap offering will be US$700.0 million. Closing is expected to occur on February 13, 2024.

CSN expects to use the net proceeds from the offering for debt repayment and general corporate purposes.

When issued, the Notes will not have been registered under the SecuritiesAct or state securities laws and may not be offered or sold in the United States absent registration or an applicable exemption from theregistration requirements of the Securities Act and applicable state securities laws. This press release does not constitute an offerto sell or the solicitation of an offer to buy the Notes or any other securities and shall not constitute an offer, solicitation or salein any jurisdiction in which, or to any person to whom, such an offer, solicitation or sale is unlawful. Any offers of the Notes willbe made only by means of a private offering memorandum.

This press release may contain forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the U.S. Securities Exchange Act of 1934, as amended. Forward-looking information involves important risks and uncertainties that could significantly affect anticipated results in the future, and, accordingly, such results may differ from those expressed in any forward-looking statements.

COMPANHIA SIDERÚRGICANACIONAL

Marcelo Cunha Ribeiro

Chief Financial and InvestorRelations Officer

SIGNATURES

Pursuant to the requirements of the U.S. Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.