AK Steel Holding (AKS)

4.1. Manner of Borrowing and Funding Revolver Loans.

4.1.1. Notice of Borrowing.

(a) Whenever Borrower desires funding of a Borrowing of Revolver Loans, Borrower shall give Agent a Notice of Borrowing. Such notice must be received by Agent no later than 11:00 a.m. (Central Time) (i) on the Business Day of the requested funding date, in the case of Base Rate Loans, and (ii) at least three Business Days prior to the requested funding date, in the case of LIBOR Loans. Notices received after 11:00 a.m. (Central Time) shall be deemed received on the next Business Day. Each Notice of Borrowing shall be irrevocable, shall specify (1) the amount of the Borrowing, (2) the requested funding date (which must be a Business Day), (3) whether the Borrowing is to be made as Base Rate Loans or LIBOR Loans, and (4) in the case of LIBOR Loans, the duration of the applicable Interest Period (which shall be deemed to be one month if not specified).

-35-

(b) Unless payment is otherwise timely made by Borrower, the becoming due of any Obligations (whether principal, interest, fees or other charges, including Extraordinary Expenses, LC Obligations, Cash Collateral and Bank Product Debt, but excluding Obligations other than principal, interest, scheduled fees and LC Obligations, which are being disputed in good faith by Borrower and are not more than thirty (30) days past due) shall be deemed to be a request for Base Rate Revolver Loans on the due date, in the amount of such Obligations. The proceeds of such Revolver Loans shall be disbursed as direct payment of the relevant Obligation. In addition, Agent may, at its option, charge such Obligations against any operating, investment or other account of Borrower maintained with Agent or any of its Affiliates.

(c) If Borrower establishes a controlled disbursement account with Agent or any Affiliate of Agent, then the presentation for payment of any check or other item of payment drawn on such account at a time when there are insufficient funds to cover it shall be deemed to be a request for Base Rate Revolver Loans on the date of such presentation, in the amount of the check and items presented for payment. The proceeds of such Revolver Loans may be disbursed directly to the controlled disbursement account or other appropriate account.

4.1.2. Fundings by Lenders. Each Lender shall timely honor its Revolver Commitment by funding its Pro Rata share of each Borrowing of Revolver Loans that is properly requested hereunder. Except for Borrowings to be made as Swingline Loans, Agent shall endeavor to notify Lenders of each Notice of Borrowing (or deemed request for a Borrowing) by 12:00 noon (Central Time) on the proposed funding date for Base Rate Loans or by 3:00 p.m. (Central Time) at least two Business Days before any proposed funding of LIBOR Loans. Each Lender shall fund to Agent such Lender’s Pro Rata share of the Borrowing to the account specified by Agent in immediately available funds not later than 1:00 p.m. (Central Time) on the requested funding date, unless Agent’s notice is received after the times provided above, in which event Lender shall fund its Pro Rata share by 11:00 a.m. (Central Time) on the next Business Day. Subject to its receipt of such amounts from Lenders, Agent shall disburse the proceeds of the Revolver Loans as directed by Borrower. Unless Agent shall have received (in sufficient time to act) written notice from a Lender that it does not intend to fund its Pro Rata share of a Borrowing, Agent may assume that such Lender has deposited or promptly will deposit its share with Agent, and Agent may disburse a corresponding amount to Borrower. If a Lender’s share of any Borrowing is not in fact received by Agent, then Borrower agrees to repay to Agent on demand the amount of such share, together with interest thereon from the date disbursed until repaid, at the rate applicable to such Borrowing.

4.1.3. Swingline Loans; Settlement.

(a) Agent may, but shall not be obligated to, advance Swingline Loans to Borrower, up to an aggregate outstanding amount of $50,000,000, unless the funding is specifically required to be made by all Lenders hereunder. Each Swingline Loan shall constitute a Revolver Loan for all purposes, except that payments thereon shall be made to Agent for its own account. The obligation of Borrower to repay Swingline Loans shall be evidenced by the records of Agent and need not be evidenced by any promissory note.

(b) To facilitate administration of the Revolver Loans, Lenders and Agent agree (which agreement is solely among them, and not for the benefit of or enforceable by Borrower) that settlement among them with respect to Swingline Loans and other Revolver Loans may take place periodically on a date determined from time to time by Agent, which shall occur at least once each week. On each settlement date, settlement shall be made with each Lender in accordance with the Settlement Report delivered by Agent to Lenders. Between settlement dates, Agent may in its discretion apply payments on Revolver Loans to Swingline Loans, regardless of any designation by Borrower or any provision herein to the contrary. Each Lender’s obligation to make settlements with Agent is absolute and unconditional, without offset, counterclaim or other defense, and whether or not the Commitments

-36-

have terminated, an Overadvance exists or the conditions in Section 6 are satisfied. If, due to an Insolvency Proceeding with respect to Borrower or otherwise, any Swingline Loan may not be settled among Lenders hereunder, then each Lender shall be deemed to have purchased from Agent a Pro Rata participation in each unpaid Swingline Loan and shall transfer the amount of such participation to Agent, in immediately available funds, within one Business Day after Agent’s request therefor.

4.1.4. Notices. Borrower authorizes Agent and Lenders to extend, convert or continue Loans, effect selections of interest rates, and transfer funds to or on behalf of Borrower based on telephonic or e-mailed instructions. Borrower shall confirm each such request by prompt delivery to Agent of a Notice of Borrowing or Notice of Conversion/Continuation, if applicable, but if it differs in any material respect from the action taken by Agent or Lenders, the records of Agent and Lenders shall govern. Neither Agent nor any Lender shall have any liability for any loss suffered by Borrower as a result of Agent or any Lender acting upon its understanding of telephonic or e-mailed instructions from a person believed in good faith by Agent or any Lender to be a person authorized to give such instructions on Borrower’s behalf.

4.2. Defaulting Lender. If a Lender fails to make any payment to Agent that is required hereunder, Agent may (but shall not be required to), in its discretion, retain payments that would otherwise be made to such defaulting Lender hereunder, apply the payments to such Lender’s defaulted obligations or readvance the funds to Borrower in accordance with this Agreement. The failure of any Lender to fund a Loan or to make a payment in respect of a LC Obligation shall not relieve any other Lender of its obligations hereunder, and no Lender shall be responsible for default by another Lender. Lenders and Agent agree (which agreement is solely among them, and not for the benefit of or enforceable by Borrower) that, solely for purposes of determining a defaulting Lender’s right to vote on matters relating to the Loan Documents and to share in payments, fees and Collateral proceeds thereunder, a defaulting Lender shall not be deemed to be a “Lender” until all its defaulted obligations have been cured.

4.3. Number and Amount of LIBOR Loans; Determination of Rate. For ease of administration, all LIBOR Revolver Loans having the same length and beginning date of their Interest Periods shall be aggregated together, and such Borrowings shall be allocated among Lenders on a Pro Rata basis. No more than 10 Borrowings of LIBOR Loans may be outstanding at any time, and each Borrowing of LIBOR Loans when made shall be in a minimum amount of $5,000,000, or an increment of $1,000,000 in excess thereof. Upon determining LIBOR for any Interest Period requested by Borrower, Agent shall promptly notify Borrower thereof by telephone or electronically and, if requested by Borrower, shall confirm any telephonic notice in writing.