As filed with the Securities and Exchange Commission on June 21, 2023.

Registration No. 333-260534

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

POST-EFFECTIVE AMENDMENT NO. 4

to

FORM F-1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

ALGOMA STEEL GROUP INC.

(Exact Name of Registrant as Specified in Its Charter)

105 West Street

Sault Ste. Marie, Ontario

P6A 7B4, Canada

(705) 945-2351

(Address, including zip code, and telephone number, including area code, of Registrant’s principal executive offices)

Algoma Steel USA Inc.

1209 Orange Street

Wilmington, Delaware 19801

(302) 658-7581

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Approximate date of commencement of proposed sale to the public: From time to time after this Registration Statement becomes effective.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933 check the following box:  ☒

If this form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☒

This post-effective registration statement amends registration statement number 333-260534.

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933. Emerging growth company  ☐

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.  ☐

ADDITION OF EXHIBITS

This Post-Effective Amendment No. 4 to the Registration Statement on Form F-1 (File No. 333-260534) (the “Registration Statement”) is being filed to include as an exhibit Deloitte LLP’s consent to the use of its report dated June 21, 2023, with respect to the financial statements of Algoma Steel Group Inc. included in the Registration Statement as indicated in Item 8(a) filed herewith.

PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 8. Exhibits and Financial Statements Schedules

(a) Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant has duly caused this Post-Effective Amendment No. 4 to the registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Sault Ste. Marie, Ontario on the 21^st day of June, 2023.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Post-Effective Amendment No. 4 to the registration statement has been signed below by the following persons in the capacities and on the dates indicated.

AUTHORIZED REPRESENTATIVE

Pursuant to the requirements of the Securities Act of 1933, as amended, the undersigned, the duly authorized representative in the United States of Algoma Steel Group Inc. has signed this Post-Effective Amendment No. 4 to the registration statement on June 21, 2023.

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the use in the Registration Statement No. 333-260534 on Form F-1 (the “Registration Statement”) of our reports dated June 21, 2023 relating to the financial statements of Algoma Steel Group Inc. and the effectiveness Algoma Steel Group Inc.’s internal control over financial reporting, appearing in the Prospectus Supplement, which is part of this Registration Statement.