USD 50.000.000 Committed Revolving Credit Facility Between Norurl Grundartangi ehf. as the Borrower and Landsbankinn hf. as the Bank

Norðurál Grundartangi ehf., reg. no. 570297-2609, a private limited liability company registered under the laws of Iceland, having its principle place of business at Grundartangi, 301 Akranes (the "Borrower") and

Landsbankinn hf., reg. no. 481008-0280, a bank incorporated in Iceland and having its registered office at Austurstræti 11, 101 Reykjavík, Iceland (the "Bank" or "Lender")

the date of drawdown of the Loan (which shall be a Business Day);

the amount in USD to be drawn; and

an account of the Borrower at a bank to which the proceeds of the borrowing are to be credited.

A copy of a board resolution from the Borrower approving the execution by the Borrower of the Agreement and if applicable a Power of Attorney in the form of Exhibit B evidencing that the person or persons signing on behalf of the Borrower is/are authorized to execute and deliver the Agreement with specimen signatures attached.

The Certificate of Incorporation and the Articles of Association of the Borrower.

A document evidencing that the Borrower has acquired the adequate insurance for the Borrowers assets and business in accordance to Clause 10.10 of this Agreement.

The Security Documents stated in Clause 12, to the satisfaction of the Lender’s legal counsel.

A confirmation, sufficient in the sole opinion of the Lender, that the Borrower and its board of directors are in compliance with the KYC rules (Know your customer) of the Lender.

a Notice of Drawing substantially in the form set out in Schedule 1 to this Agreement.

the matters represented by the Borrower set out in Clause 9.1 (Representations and warranties) are correct;

no Event of Default has occurred or will result from such advance; and

a delivery of a report stating the value of Borrowers inventory and receivables as of the most recently completed calendar month, signed by the Managing Director, the Manager of Finance or the Controller of the Borrower.

The Borrower shall repay each Loan to the Bank on its relevant repayment date as defined in each drawdown notice. No borrowing made hereunder can have a repayment date that exceeds the Termination Date. All payments made or to be made by the Borrower under this Agreement or other document envisaged hereunder shall be made free and clear of, and without deduction or withholding for or in account of, any Taxes.

without set‑off or counterclaim; and

free and clear of and without deduction for or on account of any taxes.

Corporate Existence: It is a duly organised and validly existing company incorporated and existing under the laws of Iceland;

Powers and Authorisations: It has the power to enter into and perform this Agreement and the transactions contemplated hereby and has taken all necessary action to authorize the entry into and performance of this Agreement and the transactions contemplated hereby;

Validity and Enforceability: This Agreement constitutes legal, valid and binding obligations of it enforceable in accordance with its terms;

Performance: The performance or undertaking of the obligations set out in this Agreement will not contravene any applicable law or regulation, the violation of which would reasonably be expected to result in the Borrower from being unable to pay any amount due and owing under this Agreement;

No Default: No Default has occurred which would reasonably be expected to result in the Borrower from being unable to pay any amount due and owing under this Agreement;

Non‑conflict with laws: The entry into and performance by it of this Agreement and the transactions contemplated hereby do not and will not conflict with (i) any of its constitutional documents or (ii) any agreement or document to which it is a party or which is binding upon it or any of its assets, the breach of or default under which would reasonably be expected to result in the Borrower from being unable to pay any amount due and owing under this Agreement, nor result in the creation or imposition of any encumbrance on any of its assets pursuant to the provisions of any such agreement or document;

Consents: All authorisations, approvals, consents, licenses, exemptions, filings, registrations, notarisations and other matters, official or otherwise, required or advisable in connection with the entry into performance, validity and enforceability of this Agreement and the transactions contemplated hereby have been obtained or effected and are in full force and effect;

Full Disclosure: All information supplied by it in connection with this Agreement is true, complete, accurate in all material respects and it is not aware of any material facts or circumstances that have not been disclosed to the Bank and which might, if disclosed, adversely affect the decision of a person considering whether or not to provide finance to it; provided, that with respect to any projections furnished to the Bank, the Borrower represents only that such information was prepared in good faith based upon assumptions and estimates believed by the Borrower to be reasonable at the time made in light of the circumstances when made, it being recognized by the Bank that such projections are not to be viewed as facts and that actual results during the period or periods covered by any such projections may differ from the projected results by a material amount.

No filings required: It is not necessary to ensure the legality, validity, enforceability or admissibility in evidence of this Agreement that it or any other instrument be notarised, filed, recorded, registered or enrolled in any court or public office or that any stamp, registration or similar tax or charge be paid on or in relation to this Agreement and this Agreement is in proper form for its enforcement in its jurisdiction;

Litigation: Except as set forth in Century Aluminum Company's Form 10-K for the year ended December 31, 2012 filed with the United States Securities and Exchange Commission or any Form 10-Q filed by Century Aluminum Company with the Securities and Exchange Commission on or after March 31, 2013, no litigation, arbitration or administrative proceeding is current or, to its knowledge pending or threatened, which is likely to have a material adverse effect on the financial standing of the Borrower.

its audited annual accounts no later than 120 days after the end of the period to which such statements relate; and

its unaudited semi annual internal financial statements no later than 60 days after the end of the period to which such statements relate.

The Borrower shall comply in all material respects with all laws and regulations applicable to it provided that nothing in this Clause shall prevent the Borrower from contesting in good faith the application to it of such laws and regulations.

The Borrower shall pay all its Taxes when due, except to the extent the Taxes are contested in good faith and by appropriate means, and a reserve reasonably regarded as adequate and generally required by international accounting standards has been set aside for payment of those contested Taxes.

If any Taxes or amounts in respect thereof must be deducted from any amounts payable or paid by the Borrower hereunder, the Borrower shall pay such additional amounts as may be necessary to ensure that the Bank receives a net amount equal to the full amount which it would have received on the due date had payment not been made subject to such Taxes.

Non‑payment: The Borrower fails to pay any amount payable by the Borrower under this Agreement within 3 Business Days of when such amount shall become due and payable; or

Default under other provisions: If the Borrower breaches in any material respect any of its obligations in Clause 5, the undertakings in Clause 10 or the representations and warranties in Clause 9.1, always provided that the Borrower in the event of such breach (in the sole and reasonable opinion of the Bank) has not remedied such breach within 5 Business Days from the date the Borrower receives notice thereof; or

Cross default: Failure by the Borrower to make payment when due of any obligation for borrowed money (other than in respect of this Agreement) exceeding USD 10.000.000 (or its equivalence in other currencies); or default by the Borrower, in the performance of any agreement under which any such obligation is created if the effect of such default is to cause such obligation to become due, or to permit the holder or holders of such obligation to declare such obligation due prior to its normal maturity; or

Loss of Licence: Any material licence, material contract, material consent, material approval or material authorisation necessary for the Borrower to conduct its business is lost, revoked or cancelled or materially and adversely amended or terminated, and such material license, material contract or material authorisation is not contemporaneously therewith replaced on the same, substantially the same or improved terms; or

Cessation: The cessation by the Borrower of its operations or the sale or other disposition of all or a substantial portion of its assets, or a decision by the Borrower to cease its operations or to sell or otherwise dispose of all or a substantial portion of its assets; or

Unlawfulness: At any time it is unlawful for the Borrower to perform any of its obligations hereunder; or

Legal process: Any judgment or order issued or rendered against the Borrower (1) in the case of money judgments or orders, in an amount of USD 5.000.000 or more for all such judgments in the aggregate, in each case in excess of (A) any applicable insurance and (B) any reserves maintained for such purpose, and (2) in the case of non-monetary judgments or orders, such judgments or orders in the aggregate would reasonably be expected to have a material adverse effect on the business or financial condition of the Borrower, in each of the cases described in clauses (1) and (2) above, which judgment or order is not paid, stayed, released, discharged or bonded pending appeal within 40 days; or

Insolvency; compositions: If the Borrower is unable to pay its debts as they fall due, suspends making payment on any of its debts (other than with respect to any debts that the Borrower is disputing in good faith) or commences negotiations with one or more of its creditors (other than with respect to creditor negotiations in the ordinary course of the Borrower's business), in each case the result of which would reasonably be expected to have a material adverse effect on the business or financial condition of the Borrower, or an order of a competent court or an event analogous thereto shall be made or any effective resolution passed in relation to the bankruptcy, composition proceedings, debt negations, liquidation, winding-up or similar event of the Borrower; or

Bankruptcy or insolvency proceedings: The Borrower takes any action or any legal proceedings are started or other steps taken for (i) the Borrower to be adjudicated or found bankrupt or insolvent, (ii) the winding‑up or dissolution of the Borrower, or (iii) the appointment of a liquidator, administrator, trustee, receiver or similar officer of the Borrower or the whole or any part of their respective undertaking, assets, rights or revenues; or

Change of ownership or control of the Borrower: The majority of the shares in the Borrower changes hands without a prior written consent of the Bank (other than for transfers of the majority of the shares in the Borrower to an entity that is wholly-owned (directly or indirectly) by Century Aluminum Company). In this respect change of ownership includes, but is not limited to mergers, amalgamations or demergers.

declare that the obligations of the Bank hereunder shall be cancelled forthwith whereupon the same shall be so cancelled forthwith; and/or

declare all Loans made herunder to be immediately due and payable whereupon the same shall become immediately due and payable together with all interest accrued thereon and all other amounts payable hereunder.

the occurrence of any Default;

any default in payment on the due date (or in the currency in which such payment is due) of the principal of the Loans or any part thereof or interest accrued thereon or any other amount payable hereunder or any repayment of a Loan other than on the Interest Payment Date relating thereto,

if to the Borrower, to Nordural Grundartangi ehf., Grundartangi, 301 Akranes, Iceland, email: ***@*** Fax: +354 ###-###-####. Attn: Managing Director/Finance Manager. With a copy to Century Aluminum Company, One South Wacker Drive, Chicago, IL 60606, USA, Email: ***@***, Attn: General Counsel;

if to the Bank, to Landsbankinn hf., Hafnarstræti 5. Fax No: +354 ###-###-####. Attn: Corporate Banking;