EXHIBIT 4(f) FIRST AMENDMENT TO CREDIT AGREEMENT This FIRST AMENDMENT TO CREDIT AGREEMENT (this "Amendment") is entered into on March 1, 2004 and made effective as of December 4, 2003 (the "Effective Date"), by and among Brush Engineered Materials Inc., an Ohio corporation (the "Company"), the other Borrowers (as defined in the Credit Agreement (as defined below)), the other Loan Parties (as defined in the Credit Agreement), the Lenders (as defined in the Credit Agreement), and Bank One, NA, a national banking association (the "Agent"). WHEREAS, the Company, the other Borrowers, the other Loan Parties, the Lenders, and the Agent entered into a certain Credit Agreement dated as of the Effective Date (as may from time to time be amended, restated, modified, or supplemented, the "Credit Agreement"); WHEREAS, the Company, the other Borrowers, the other Loan Parties, the Lenders, and the Agent desire to clarify certain provisions and correct certain typographical and other minor errors in the Credit Agreement so that, as modified by this Amendment, the Credit Agreement reflects the intent of the parties thereto as of the Effective Date (i.e., the Closing Date (as defined in the Credit Agreement)); WHEREAS, the Company, the other Borrowers, the other Loan Parties, the Lenders, and the Agent have agreed to amend the Credit Agreement as set forth herein; and WHEREAS, the defined terms used but not defined herein shall have the meanings ascribed to such terms in the Credit Agreement; NOW, THEREFORE, for valuable consideration received to their mutual satisfaction, the parties hereby agree as follows: 1. Amendment to Article I - Revised Definitions. The definitions "LC Obligations," and "Loan Documents" in Article I of the Credit Agreement are hereby deleted in their entirety and replaced with the following: "LC Obligations" means, at any time, the sum, without duplication, of (a) the aggregate undrawn stated amount under all Facility LCs outstanding at such time, including, without limitation, the IRB Facility LCs, plus (b) the aggregate unpaid amount at such time of all Reimbursement Obligations. "Loan Documents" means this Agreement, any Notes, the Facility LC Applications, the Collateral Documents, the Guaranty, the Export-Import Loan Documents, the Intercreditor Agreements, the LC Reimbursement Agreements, the IRB Facility LCs, the LC Bond Pledge Agreements, and all other agreements, instruments, documents and certificates identified in Section 4.1 executed and delivered to, or in favor of, Agent or any Lenders and including all other pledges, powers of attorney, consents, assignments, contracts, notices, letter of credit agreements and all other written matter whether heretofore, now or hereafter executed by or on behalf of any Loan Party, or any Authorized Officer of any Loan Party, and delivered to the Agent or any Lender in connection with the Agreement or the transactions contemplated thereby. Any reference in the Agreement or any other Loan Document to a Loan Document shall include all appendices, exhibits or schedules thereto, and all amendments, restatements, supplements or other modifications thereto, and shall refer to the Agreement or such Loan Document as the same may be in effect at any and all times such reference becomes operative. 2. Amendment to Article I -- New Definitions. The definitions "Domestic Obligations," "IRB Facility LCs" and "LC Reimbursement Agreements" are hereby added to Article I of the Credit Agreement in proper alphabetical order: "Domestic Obligations" means all of the Obligations other than the Singapore Obligations. "IRB Facility LCs" means, collectively, all commercial or stand-by letters of credit issued by the LC Issuer at the request of the Borrower for the purpose of providing credit support for one or more industrial revenue development bond issues, the proceeds of which issues are used by or loaned to one or more Domestic Borrowers for the purpose of financing one or more industrial, manufacturing, or similar development projects, including, in each case, any amendments, modifications, supplements, or replacements. "LC Bond Pledge Agreements" means, collectively, all bond pledge agreements entered into by one or more Domestic Borrowers, the LC Issuer, and the applicable bond trustees to secure the Reimbursement Obligations associated with any particular IRB Facility LC or LC Reimbursement Agreement, including, in each case, any amendments, modifications, supplements, or replacements. "LC Reimbursement Agreements" means, collectively, all reimbursement agreements entered into by one or more Domestic Borrowers and the LC Issuer to further evidence the Reimbursement Obligations associated with any particular IRB Facility LC, including, in each case, any amendments, modifications, supplements, or replacements. 3. Amendment concerning the Defined Term "Aggregate Revolving Commitment" 2 (a) Sections 2.15(b), 2.15(c), 2.15(d), 6.7(c), and 8.1(a) of the Credit Agreement are hereby amended by deleting the text "Revolving Commitment" therein and replacing it with "Aggregate Revolving Commitment". (b) Sections 12.3(a) and 12.3(b) of the Credit Agreement are hereby amended by deleting the text "Revolving Commitment" therein and replacing it with "a portion of the Aggregate Revolving Commitment". (c) Section 12.6 of the Credit Agreement is hereby amended by deleting the text "Revolving Commitment" therein and replacing it with "share of the Aggregate Revolving Commitment". 4. Amendment to Section 2.1.2. Section 2.1.2(a) of the Credit Agreement is hereby amended by deleting the first sentence therein and replacing it with the following: The LC Issuer hereby agrees, on the terms and conditions set forth in this Agreement, to issue to a Domestic Loan Party standby and commercial Letters of Credit, including, without limitation, the IRB Facility LCs (each, a "Facility LC") and to renew, extend, increase, decrease or otherwise modify each Facility LC ("Modify," and each such action a "Modification"), from time to time from and including the Closing Date of this Agreement and prior to the Facility Termination Date upon the request of the Company, on behalf of itself or the applicable Loan Party; provided that, the maximum face amount of the Facility LC to be issued or Modified, does not exceed the lesser of (i) an amount equal to $25,000,000 minus the sum of (A) the aggregate undrawn amount of all outstanding Facility LCs at such time plus, without duplication, (B) the aggregate unpaid Reimbursement Obligations with respect to all Facility LCs outstanding at such time and (ii) the Domestic Availability. 5. Amendment to Section 2.11. Section 2.11(a) of the Credit Agreement is hereby amended by deleting the first and last sentences therein and replacing them, respectively, with the following: Each Floating Rate Advance shall bear interest on the outstanding principal amount thereof, for each day from and including the date such Advance is made or is automatically converted from a Fixed Rate Advance into a Floating Rate Advance pursuant to Section 2.7, to but excluding the date it is paid or is converted into a Fixed Rate Advance pursuant to Section 2.7 hereof, at a rate per annum equal to the Floating Rate or Singapore Derived Floating Rate, as the case may be, for such day. If at any time Loans are outstanding with respect to which the Company has not delivered a notice to the Applicable Agent specifying the 3 basis for determining the interest rate applicable thereto, those Loans shall bear interest at the Floating Rate or the Singapore Derived Floating Rate, as the case may be. 6. Amendment to Section 6.20. Section 6.20(l) of the Credit Agreement is hereby amended by deleting the text "$500,000" therein and replacing it with "$1,000,000". 7. Amendment to Section 8.1. Section 8.1(a)(i) of the Credit Agreement is hereby amended by deleting the text "Singapore Commitment" therein and replacing it with "Aggregate Singapore Commitment". 8. Amendment to Section 9.16. Section 9.16 of the Credit Agreement is hereby amended in its entirety and replaced with the following: 9.16 No Cross Collateralization. For the avoidance of doubt, the parties hereto agree that the Collateral of the Singapore Loan Parties securing the Secured Obligations of the Singapore Loan Parties shall not constitute security for the Domestic Obligations. 9. Amendment to Section 16.2. Section 16.2 of the Credit Agreement is hereby amended by deleting the second sentence therein and replacing it with the following: Upon the occurrence and during the continuance of a Default which has not been waived in writing, all such deposits to the Cash Management Account in respect of a Borrower shall be credited to such Borrower as follows: (1) to the extent such deposits constitute the proceeds of the Export-Import Collateral, such deposits shall be applied directly to the outstanding principal, accrued and unpaid interest, and fees related to the Export-Import Loan and (2) all deposits other than those described in the immediately preceding subparagraph (1) (except to the extent such deposits remain after the Export-Import Loan is indefeasibly paid in full), (a) first to the payment of any fees, expenses or Obligations (other than Obligations to pay (i) principal and interest relating to the Advances and (ii) principal, accrued and unpaid interest, and fees related to the Export-Import Loan) then due and payable by the Borrowers to the Applicable Agent or Lenders hereunder or under any of the other Loan Documents; (b) second, to the ratable payment of interest due on the Loans made to the Borrowers (other than interest related to the Export-Import Loan); (c) third, to late charges until paid in full; (d) fourth, to the principal installments then due and payable with respect to the Term Loans; (e) fifth, to the outstanding principal amount of any Revolving Loans; (f) sixth, at the Required Lenders' option, in their sole and absolute discretion, to any and all other outstanding Obligations of the Borrowers (other than in respect of the (i) aggregate undrawn amount of any Facility LC outstanding for the account of the Borrowers and (ii) principal, 4 accrued and unpaid interest, and fees related to the Export-Import Loan) in such order as the Required Lenders may choose in their sole discretion; and (g) seventh, as cash collateral security against the aggregate undrawn amount of any Letter of Credit outstanding for the account of the Borrowers and any other Obligations (whether then or thereafter outstanding, including, without limitation, to the extent not indefeasibly paid in full by the deposits described in subparagraph (1) above, the Export-Import Loan) of the Borrowers. 10. Amendment to Section 16.2. Section 16.2 of the Credit Agreement is hereby amended by adding the following sentence the end of such section: Notwithstanding the foregoing, (a) all deposits received in the Locked Box in Singapore shall be applied to the Singapore Obligations in the order set forth above, and (b) all deposits received in the Locked Box located in the United States shall be applied first to the Domestic Obligations in the order set forth above and then to the Singapore Obligations in the order set forth above. 11. Amendment to the Pricing Schedule. The Pricing Schedule attached to the Credit Agreement is hereby amended by deleting the text "Fixed Charge Coverage Ratio" from the first row, second column and replacing it with "Leverage Ratio". 12. General Terms. This Amendment shall be effective as of the Effective Date. Except as specifically amended herein, directly or by reference, all of the terms and conditions set forth in the Credit Agreement are confirmed and ratified, and shall remain as originally written. This Amendment shall be construed in accordance with the laws of the State of Ohio, without regard to principles of conflict of laws. The Credit Agreement and all other Loan Documents shall remain in full force and effect in all respects as if the unpaid balance of the principal outstanding, together with interest accrued thereon, had originally been payable and secured as provided for therein, as amended from time to time and as modified by this Amendment. Nothing herein shall affect or impair any rights and powers which the Company, any other Borrower, any Loan Party, any Lender or the Agent may have under the Credit Agreement and any and all other Loan Documents. 13. No Effect. The parties hereto agree that this Amendment shall in no manner affect or impair the liens and security interests evidenced by the Credit Agreement and/or any other instruments evidencing, securing or related to the Obligations. 14. Counterparts. This Amendment may be executed in counterparts and all such counterparts shall constitute one agreement binding on all the parties, notwithstanding that the parties are not signatories to the same counterpart. [Remainder of Page Intentionally Left Blank] 5 IN WITNESS WHEREOF, the Company, the other Borrowers, the Lenders and the Agent have executed this Amendment as of the date first above written. BORROWERS: BRUSH ENGINEERED MATERIALS INC. BEM SERVICES, INC. By: By: --------------------------------- ---------------------------------- Name: Name: ------------------------------- -------------------------------- Title: Title: ------------------------------ ------------------------------- BRUSH INTERNATIONAL, INC. BRUSH WELLMAN INC. By: By: --------------------------------- ---------------------------------- Name: Name: ------------------------------- -------------------------------- Title: Title: ------------------------------ ------------------------------- ZENTRIX TECHNOLOGIES INC. BRUSH RESOURCES INC. By: By: --------------------------------- ---------------------------------- Name: Name: ------------------------------- -------------------------------- Title: Title: ------------------------------ ------------------------------- BRUSH CERAMIC PRODUCTS INC. CIRCUITS PROCESSING TECHNOLOGY, INC. By: By: --------------------------------- ---------------------------------- Name: Name: ------------------------------- -------------------------------- Title: Title: ------------------------------ ------------------------------- TECHNICAL MATERIALS, INC. WILLIAMS ADVANCED MATERIALS INC. By: By: --------------------------------- ---------------------------------- Name: Name: ------------------------------- -------------------------------- Title: Title: ------------------------------ ------------------------------- WILLIAMS ACQUISITION, LLC By: --------------------------------- Name: ------------------------------- Title: ------------------------------ SINGAPORE BORROWER: BRUSH WELLMAN (SINGAPORE) PTE LTD. By: ---------------------------------- Name: Tony Ong Wee Swez Title: Managing Director Address: c/o Brush Engineered Materials, Inc. 17876 St. Clair Avenue Cleveland, Ohio 44110 7 LENDERS: BANK ONE, NA Individually, as the Agent, a Lender and LC Issuer By: -------------------------------- Name: Joseph J. Virzi Title: Senior Vice President Address: 100 East Broad Street Columbus, OH 43215 Attention: Randy R. Radik Telephone: (330) 972-1206 Facsimile: (330) 972-1456 8 BANK ONE, NA Singapore Branch as a Lender By: -------------------------------- Name: Joseph J. Virzi Title: Senior Vice President Address: 100 East Broad Street Columbus, OH 43215 Attention: Randy R. Radik Telephone: (330) 972-1206 Facsimile: (330) 972-1456 9 LASALLE BANK NATIONAL ASSOCIATION as a Lender By: -------------------------------- Name: Patrick F. Dunphy Title: First Vice President Address : 1300 E. 9th Street, Suite 1000 Cleveland, OH 44114 Attention: Jeri Zimmerman Telephone: (216) 802-2200 Facsimile: (216) 802-2212 10 RZB FINANCE LLC as a Lender By: --------------------------------- Name: ------------------------------- Title: ------------------------------ By: --------------------------------- Name: ------------------------------- Title: ------------------------------ Address : 24 Grassy Plain Street Bethel, CT 06801 Attention: Marisa Mancini Telephone: (203) 207-0115 Facsimile: (203) 744-6474 11 THE CIT GROUP/BUSINESS CREDIT, INC. as a Lender By: --------------------------------- Name: Douglas A. Nickel Title: Vice President Address : Two Wachovia Center, 23rd Fl. 301 S. Tryon Street P.O. Box 30337 Charlotte, NC 28239-0337 Attention: Robert Newman, Vice President Telephone: (704) 339-3044 Facsimile: (704) 339-2208 12 FIFTH THIRD BANK as a Lender By: --------------------------------- Name: Ken Horner Title: Vice President Address : 1404 East Ninth Street, 3rd Floor Mail Drop: A65111 Cleveland, OH 44114 Attention: Ken Horner Vice President Telephone: (216) 274-5579 Facsimile: (216) 274-5441 13 ORIX FINANCIAL SERVICES, INC. as a Lender By: --------------------------------- Name: ------------------------------ Title: ------------------------------ Address : One South Wacker, Suite 2750 Chicago, IL 60606 Attention: Jonathan Millard Telephone: (312) 469-5081 Facsimile: (770) 970-8181 14