Exhibit 10.12(h)

EXECUTION COPY

WAIVER TO AMENDED AND RESTATED

REVOLVING LOAN AGREEMENT

This Waiver
to Amended and Restated Revolving Loan Agreement (this Waiver) is entered into as of February 15, 2008 by and among Wheeling-Pittsburgh Steel Corporation, a Delaware corporation (Borrower), Wheeling-Pittsburgh
Corporation, a Delaware corporation (Holdings), General Electric Capital Corporation, as administrative agent (Administrative Agent) for the Lenders (this and all other capitalized terms not defined herein shall have the
meanings set forth in the Loan Agreement as defined below), and the other Lenders signatory hereto.

RECITALS

WHEREAS, Borrower, Holdings, Administrative Agent, Lenders and certain other parties thereto have entered into an Amended and Restated Revolving Loan
Agreement dated as of July 8, 2005 (as heretofore or hereafter amended, modified, supplemented or restated, the Loan Agreement);

WHEREAS, Borrower desires, and the Lenders and Administrative Agent are willing, to waive certain post-amendment obligations pursuant to that certain Seventh Amendment to Amended and Restated Revolving Loan Agreement dated as of
January 31, 2008 by and among Borrower, Holdings, Administrative Agent and the Lenders (the Seventh Amendment), upon and subject to the conditions set forth in this Waiver; and

WHEREAS, this Waiver shall constitute a Loan Document and these Recitals shall be construed as part of this Waiver.

NOW, THEREFORE, for good and valuable consideration, the receipt and sufficiency of which hereby are acknowledged, the parties hereto hereby agree as
follows:

1. Waiver. Administrative Agent and Lenders hereby expressly waive the post-amendment obligations of Borrower required
pursuant to Section 5 of the Seventh Amendment. Such waiver is only applicable and shall only be effective in the specific instances and for the specific purposes for which made or given.

2. Representations and Warranties of Borrower.

(a) The Recitals in this Waiver are true and correct in all respects.

(b) All
representations and warranties of the Credit Parties in the Loan Agreement and in the other Loan Documents to which it is a party are incorporated herein in full by this reference and are true and correct in all material respects as of the date
hereof, except to the extent that any such representation or warranty expressly relates to an earlier date.



---

(c) After giving effect to this Waiver, no Default or Event of Default has occurred and
is continuing.

(d) Borrower has the power, and has been duly authorized by all requisite action, to execute and deliver
this Waiver and the other documents and agreements executed and delivered in connection herewith to which it is a party. This Waiver has been duly executed by Borrower and the other documents and agreements executed and delivered in connection
herewith to which Borrower is a party have been duly executed and delivered by it.

(e) This Waiver is the legal, valid and
binding obligation of Borrower and the other documents and agreements executed or delivered in connection herewith to which any of the other Credit Parties is a party are the legal, valid and binding obligations of the other Credit Parties, in each
case enforceable against each of the other Credit Parties in accordance with their respective terms, except as such enforceability may be limited by any applicable bankruptcy, insolvency, reorganization, moratorium, or similar law affecting
creditors rights generally.

(f) The execution, delivery and performance of this Waiver and the other documents and
agreements executed and delivered in connection herewith do not and will not (i) violate any law, rule, regulation or court order to which any of the Credit Parties is subject; (ii) conflict with or result in a breach of the certificate of
formation or incorporation, bylaws, limited liability company agreement or other organizational documents of any of the Credit Parties or any other agreement or instrument to which it is party or by which the properties of any of the Credit Parties
is bound; or (iii) result in the creation or imposition of any Lien on any property of any of the Credit Parties, whether now owned or hereafter acquired.

(g) No consent or authorization of, filing with or other act by or in respect of any Governmental Waiver or any other Person is required
in connection with the execution, delivery or performance by each of the Credit Parties, or the validity or enforceability, of this Waiver or the other documents or agreements executed or delivered in connection herewith to which any of the Credit
Parties is a party, or the consummation of the transactions contemplated hereby or thereby, or the continuing operations of any of the Credit Parties following the consummation of such transactions, except as otherwise expressly contemplated by this
Waiver.

3. Conditions Precedent to Effectiveness. This Waiver shall be effective on the date (the Waiver Date) when
each of the following conditions shall have been satisfied in the sole discretion of Administrative Agent:

(i) Each of the
Credit Parties and the Requisite Lenders shall have delivered to Administrative Agent executed counterparts of this Waiver;



2



---

(ii) Delivery to Administrative Agent, for the benefit of each Lender that executes this
Waiver on or prior to the Waiver Date, a fee in an amount equal to 0.05% multiplied by each such Lenders Revolving Loan Commitment; and

(iii) Delivery to Administrative Agent of such additional agreements, documents or instruments, if any, as Administrative Agent may reasonably request.

4. Successors and Assigns. This Waiver shall inure to the benefit of and be binding upon the successors and permitted assigns of the Lenders and
Administrative Agent and shall be binding upon the successors and assigns of Borrower.

5. Counterparts. This Waiver may be executed
in one or more counterparts, each of which shall be deemed to be an original, but all of which taken together shall be one and the same instrument.

6. Headings. The paragraph headings used in this Waiver are for convenience only and shall not affect the interpretation of any of the provisions hereof.

7. APPLICABLE LAW.THIS WAIVER SHALL BE GOVERNED BY, AND CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE LAWS SET FORTH IN THE LOAN AGREEMENT, OR, IF NO JURISDICTION IS SET FORTH THEREIN, BY THE INTERNAL
LAWS (AS OPPOSED TO CONFLICT OF LAWS PROVISIONS) OF THE STATE OF NEW YORK.

8. Release of Claims. Each of Borrower and the other
Credit Parties hereby releases, remises, acquits and forever discharges each Lender, each Agent and the Issuing Bank (including any Person which is resigning or assuming such respective capacity) and each of their respective employees, agents,
representatives, consultants, attorneys, officers, directors, partners, fiduciaries, predecessors, successors and assigns, subsidiary corporations, parent corporations and related corporate divisions (collectively, the Released Parties),
from any and all actions, causes of action, judgments, executions, suits, debts, claims, demands, liabilities, obligations, damages and expenses of any and every character, known or unknown, direct or indirect, at law or in equity, of whatever
nature or kind, whether heretofore or hereafter arising, for or because of any manner of things done, omitted or suffered to be done by any of the Released Parties prior to and including the date of execution hereof, and in any way directly or
indirectly arising out of any or in any way connected to this Waiver or the other Loan Documents (collectively, the Released Matters). Borrower and each other Credit Party each hereby acknowledges that the agreements in this
Section 8 are intended to be in full satisfaction of all or any alleged injuries or damages arising in connection with the Released Matters. Borrower and each other Credit Party each hereby represents and warrants to each Lender, each
Agent and the L/C Issuer (including any Person which is resigning or assuming such respective capacity) that it has not purported to transfer, assign or otherwise convey any right, title or interest of such Borrower or any other Credit Party in any
Released Matter to any other Person and that the foregoing constitutes a full and complete release of all Released Matters.



3



---

EACH OF BORROWER AND EACH OTHER CREDIT PARTY AGREES TO ASSUME THE RISK OF ANY AND ALL UNKNOWN,
UNANTICIPATED OR MISUNDERSTOOD DEFENSES, CLAIMS, CONTRACTS, LIABILITIES, INDEBTEDNESS AND OBLIGATIONS WHICH ARE RELEASED, WAIVED AND DISCHARGED BY THIS WAIVER. EACH OF BORROWER AND EACH OTHER CREDIT PARTY HEREBY WAIVES AND RELINQUISHES ALL RIGHTS
AND BENEFITS WHICH IT MIGHT OTHERWISE HAVE UNDER ANY CIVIL CODE OR ANY SIMILAR LAW, TO THE EXTENT SUCH LAW MAY BE APPLICABLE, WITH REGARD TO THE RELEASE OF SUCH UNKNOWN, UNANTICIPATED OR MISUNDERSTOOD DEFENSES, CLAIMS, CONTRACTS, LIABILITIES,
INDEBTEDNESS AND OBLIGATIONS. TO THE EXTENT THAT SUCH LAWS MAY BE APPLICABLE, EACH OF BORROWER AND EACH OTHER CREDIT PARTY WAIVES AND RELEASES ANY RIGHT OR DEFENSE WHICH IT MIGHT OTHERWISE HAVE UNDER ANY OTHER LAW OR ANY APPLICABLE JURISDICTION
WHICH MIGHT LIMIT OR RESTRICT THE EFFECTIVENESS OR SCOPE OF ANY OF THEIR WAIVERS OR RELEASES HEREUNDER.

[Signature page follows]



4



---

IN WITNESS WHEREOF, the parties hereto have caused this Waiver to be executed as of the date first
written above.



GENERAL ELECTRIC CAPITAL CORPORATION, individually and as Administrative AgentBy:

/s/ Matthew N. McAlpineName:

Matthew N. McAlpineTitle:

Duly Authorized Signatory


Signature Page to Waiver



---

WHEELING-PITTSBURGH CORPORATIONBy:

/s/ Michael P. DiClementeName:

Michael P. DiClementeTitle:

Vice President and TreasurerWHEELING-PITTSBURGH STEEL CORPORATION, as BorrowerBy:

/s/ Michael P. DiClementeName:

Michael P. DiClementeTitle:

Vice President and Treasurer


Signature Page to Waiver



---

THE CIT GROUP/BUSINESS CREDIT, INC., as a LenderBy:

/s/ Eustachio BrunoName:

Eustachio BrunoTitle:

Vice President


Signature Page to Waiver



---

BANK OF AMERICA, N.A., as a LenderBy:

/s/ Edmundo KahnName:

Edmundo KahnTitle:

Vice-President


Signature Page to Waiver



---

WACHOVIA BANK, NATIONAL ASSOCIATION,as a LenderBy:

/s/ Constantine KrikosName:

Constantine KrikosTitle:

Vice President


Signature Page to Waiver



---

JPMORGAN CHASE BANK, NA, as a LenderBy:

/s/ David LehnerName:

David LehnerTitle:

Vice President


Signature Page to Waiver



---

UBS LOAN FINANCE LLC, as a LenderBy:

/s/ Mary E. EvansName:

Mary E. EvansTitle:

Associate DirectorBy:

/s/ Irja R. OtsaName:

Irja R. OtsaTitle:

Associate Director


Signature Page to Waiver



---

Acknowledgement of Waiver

Each of the undersigned (i) acknowledges receipt of a copy of the Waiver to Amended and Restated Revolving Loan Agreement dated as of
February 15, 2008 (the Waiver; capitalized terms used herein shall, unless otherwise defined herein, have the meanings provided in the Waiver), by and among Borrower, the Lenders party thereto and Administrative Agent,
(ii) consents to such Waiver and each of the transactions referenced in the Waiver and (iii) hereby acknowledges and agrees, in its respective capacities as debtor, obligor, grantor, mortgagor, pledgor, guarantor, surety, indemnitor,
assignor and each other similar capacity, if any, in which any such entity or person has previously granted Liens on all or any part of its real, personal or intellectual property pursuant to the Loan Agreement or any other Loan Document or has
guaranteed the repayment of the liabilities pursuant to any of the foregoing agreements, that all of such Liens and repayment obligations remain and shall continue in full force and effect and each of which is hereby ratified, confirmed and
reaffirmed in all respects.



---

|                                |  |                             
|------------------------------- |  | ----------------------------
|WHEELING-PITTSBURGH CORPORATION
|                                | 
|By:                             |  | /s/ Michael P. DiClemente   
|Name:                           |  | Michael P. DiClemente       
|Title:                          |  | Vice President and Treasurer
|                               
|WP STEEL VENTURE CORPORATION   
|                                | 
|By:                             |  | /s/ Paul J. Mooney          
|Name:                           |  | Paul J. Mooney              
|Title:                          |  | Vice President and Treasurer
|                               
|ESMARK INCORPORATED            
|                                | 
|By:                             |  | /s/ Michael P. DiClemente   
|Name:                           |  | Michael P. DiClemente       
|Title:                          |  | Vice President and Treasurer