AK Steel Holding (AKS)

3.1. Interest.

3.1.1. Rates and Payment of Interest.

(a) The Obligations shall bear interest (i) if a Base Rate Loan, at the Base Rate in effect from time to time, plus the Applicable Margin; (ii) if a LIBOR Loan, at LIBOR for the applicable Interest Period, plus the Applicable Margin; and (iii) if any other Obligation (including, to the extent permitted by law, interest not paid when due), at the Base Rate in effect from time to time, plus the Applicable Margin for Base Rate Revolver Loans. Interest shall accrue from the date the Loan is advanced or the Obligation is incurred or payable, until paid by Borrower. If a Loan is repaid on the same day made, one day’s interest shall accrue.

(b) During an Insolvency Proceeding with respect to Borrower, or during any other Event of Default if Agent or Required Lenders in their discretion so elect, Obligations shall bear interest at the Default Rate (whether before or after any judgment). Borrower acknowledges that the cost and expense to Agent and Lenders due to an Event of Default are difficult to ascertain and that the Default Rate is a fair and reasonable estimate to compensate Agent and Lenders for this.

(c) Interest accrued on the Loans shall be due and payable in arrears, (i) on the first day of each month and, for any LIBOR Loan, the last day of its Interest Period (provided that, for Interest Periods on LIBOR Loans in excess of 3 months, interest shall be due and payable on each day that occurs during such Interest Period every 90 days following the first day of such Interest Period and on the last day of such Interest Period); (ii) on any date of prepayment, with respect to the principal amount of Loans being prepaid; and (iii) on the Commitment Termination Date. Interest accrued on any other Obligations shall be due and payable as provided in the Loan Documents and, if no payment date is specified, shall be due and payable on demand. Notwithstanding the foregoing, interest accrued at the Default Rate shall be due and payable on demand.

3.1.2. Application of LIBOR to Outstanding Loans.

(a) Borrower may on any Business Day, subject to delivery of a Notice of Conversion/Continuation, elect to convert any portion of the Base Rate Loans to, or to continue any LIBOR Loan at the end of its Interest Period as, a LIBOR Loan. During any Default or Event of Default, Agent may (and shall at the direction of Required Lenders) declare that no Loan may be made, converted or continued as a LIBOR Loan. In addition, until Agent notifies Borrower that syndication of the credit facility hereunder is complete, no Loan may be made as or converted into a LIBOR Loan.

-31-

(b) Whenever Borrower desires to convert or continue Loans as LIBOR Loans, Borrower shall give Agent a Notice of Conversion/Continuation, no later than 11:00 a.m. (Central Time) at least three Business Days before the requested conversion or continuation date. Promptly after receiving any such notice, Agent shall notify each Lender thereof. Each Notice of Conversion/Continuation shall be irrevocable, and shall specify the amount of Loans to be converted or continued, the conversion or continuation date (which shall be a Business Day), and the duration of the Interest Period (which shall be deemed to be one month if not specified). If, upon the expiration of any Interest Period in respect of any LIBOR Loans, Borrower shall have failed to deliver a Notice of Conversion/Continuation, they shall be deemed to have elected to convert such Loans into Base Rate Loans.

3.1.3. Interest Periods. In connection with the making, conversion or continuation of any LIBOR Loans, Borrower shall select an interest period (“Interest Period”) to apply, which interest period shall be one, two, three or six months; provided, however, that:

(a) the Interest Period shall commence on the date the Loan is made or continued as, or converted into, a LIBOR Loan, and shall expire on the numerically corresponding day in the calendar month at its end;

(b) if any Interest Period commences on a day for which there is no corresponding day in the calendar month at its end or if such corresponding day falls after the last Business Day of such month, then the Interest Period shall expire on the last Business Day of such month; and if any Interest Period would expire on a day that is not a Business Day, the period shall expire on the next Business Day; and

(c) no Interest Period shall extend beyond the Revolver Termination Date.

3.1.4. Interest Rate Not Ascertainable. If Agent shall determine that on any date for determining LIBOR, due to any circumstance affecting the London interbank market, adequate and fair means do not exist for ascertaining such rate on the basis provided herein, then Agent shall immediately notify Borrower of such determination. Until Agent notifies Borrower that such circumstance no longer exists, the obligation of Lenders to make LIBOR Loans shall be suspended, and no further Loans may be converted into or continued as LIBOR Loans.