Exhibit 5.1
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767 Fifth Avenue
New York, NY 10153-0119
+1 212 310 8000 tel
+1 212 310 8007 fax
February 15, 2019
AK Steel Holding Corporation
AK Steel Corporation
9227 Centre Pointe Drive
West Chester, OH 45069
Ladies and Gentlemen:
We have acted as counsel to AK Steel Corporation, a Delaware corporation (the “Company”), AK Steel Holding Corporation, a Delaware corporation (“Parent”), AK Tube LLC, a Delaware limited liability company (“AK Tube”), AK Steel Properties, Inc., a Delaware corporation (“AK Steel Properties”) and Mountain State Carbon, LLC, a Delaware limited liability company (“MSC” and, together with the Company, Parent, AK Tube and AK Steel Properties, the “Companies”), in connection with the preparation and filing with the Securities and Exchange Commission (the “Commission”) of the Companies’ Registration Statement on FormS-3 (the “Registration Statement”) under the Securities Act of 1933, as amended (the “Securities Act”), relating to the issuance and sale from time to time of an indeterminate amount of (i) secured or unsecured debt securities by the Company (the “Debt Securities”); (ii) common stock by Parent (the “Common Stock”); (iii) preferred stock by Parent (the “Preferred Stock”), (iv) warrants by Parent (the “Warrants”), (v) share purchase contracts by Parent (the “Share Purchase Contracts”), (vi) units by Parent (the “Units”) and (vii) guarantees of the Debt Securities by Parent, AK Tube, AK Steel Properties and MSC (the “Guarantees” and, together with the Debt Securities, Common Stock, Preferred Stock, Warrants, Share Purchase Contracts and Units, the “Securities”).
In so acting, we have examined originals or copies (certified or otherwise identified to our satisfaction) of (i) the Registration Statement on FormS-3, filed by the Companies on February 15, 2019 (the “Registration Statement”), including the prospectus, dated February 15, 2019, which forms a part of the Registration Statement; (ii) the Restated Certificate of Incorporation of Parent; (iii) the Indenture, dated as of June 20, 2016 (as amended and supplemented from time to time, the “Secured Indenture”), among the Companies and U.S. Bank, National Association, as trustee and collateral agent; (iv) the Indenture, dated as of May 11, 2010, among the Companies and U.S. Bank, National Association, as trustee (as amended and supplemented from time to time, the “Base Indenture” and together with the Secured Indenture, the “Indentures”); and (v) such corporate records, agreements, documents and other instruments, and such certificates or comparable documents of public officials and of officers and representatives of each of the Companies, and have made such inquiries of such officers and representatives, as we have deemed relevant and necessary as a basis for the opinion hereinafter set forth.
In such examination, we have assumed the genuineness of all signatures, the legal capacity of all natural persons, the authenticity of all documents submitted to us as originals, the conformity to original documents of all documents submitted to us as certified, conformed or photostatic copies and the authenticity of the originals of such latter documents. As to all questions of fact material to this opinion