AMENDMENT NO. 4 TO THIRD AMENDED AND RESTATED PRECIOUS METALS AGREEMENT

THIS AMENDMENT NO. 4 TO THIRD AMENDED AND RESTATED PRECIOUS METALS AGREEMENT (this “Amendment”) is made as of September 13, 2013, by and among THE BANK OF NOVA SCOTIA, a Canadian chartered bank (the “Metal Lender”); MATERION CORPORATION (f/k/a Brush Engineered Materials Inc.), an Ohio corporation (“BEM”); MATERION ADVANCED MATERIALS TECHNOLOGIES AND SERVICES INC. (f/k/a Williams Advanced Materials Inc.), a New York corporation (“WAM”); MATERION TECHNICAL MATERIALS INC. (f/k/a Technical Materials, Inc.), an Ohio corporation (“TMI”); MATERION BRUSH INC. (f/k/a Brush Wellman Inc.), an Ohio corporation (“BWI”); MATERION TECHNOLOGIES INC. (f/k/a Zentrix Technologies Inc.), an Arizona corporation (“ZTI”); MATERION BREWSTER LLC (f/k/a Williams Acquisition, LLC), a New York limited liability company d/b/a Pure Tech (“Pure Tech”); MATERION PRECISION OPTICS AND THIN FILM COATINGS CORPORATION (f/k/a Thin Film Technology, Inc.), a California corporation (“TFT”); MATERION LARGE AREA COATINGS LLC (f/k/a Techni-Met, LLC), a Delaware limited liability company (“TML”); MATERION ADVANCED MATERIALS TECHNOLOGIES AND SERVICES CORP. (f/k/a Academy Corporation), a New Mexico corporation (“AC”); MATERION ADVANCED MATERIALS TECHNOLOGIES AND SERVICES LLC (f/k/a Academy Gallup, LLC), a New Mexico limited liability company (“AG”); and such other Subsidiaries of BEM who may from time to time become parties by means of their execution and delivery with the Metal Lender of a Joinder Agreement under the Precious Metals Agreement (as defined below). BEM, WAM, TMI, BWI, ZTI, Pure Tech, TFT, TML, AC, AG and such Subsidiaries are herein sometimes referred to collectively as the “Customers” and each individually as a “Customer”.

WHEREAS, the Metal Lender and the Customers are parties to a certain Third Amended and Restated Precious Metals Agreement, effective as of October 1, 2010, as amended by that certain Amendment No. 1, dated as of March 31, 2011, that certain Amendment No. 2, dated as of August 18, 2011, that certain Amendment No. 3, dated as of October 17, 2011 (as amended, the “Precious Metals Agreement”); and

WHEREAS, the parties hereto desire to amend certain provisions of the Precious Metals Agreement as hereinafter provided;

NOW, THEREFORE, for value received and for other good and valuable consideration, the receipt and adequacy of which are hereby acknowledged, the parties hereto hereby amend the Precious Metals Agreement and agree, effective as of the date first written above, as follows:

1.Amendments.

(a)    The definition of “Applicable Margin” appearing in Section 1 of the Precious Metals Agreement is hereby amended by deleting the pricing grid appearing therein and replacing it with the following:

(b)    The definition of “Fixed Rate Period” appearing in Section 1 of the Precious Metals Agreement is hereby amended by deleting the following clause therein: “; and no Fixed Rate Period may end on a date later than ten (10) Business Days prior to the Maturity Date”.

(c)    The definition of “Gold Loan Limit” appearing in Section 1 of the Precious Metals Agreement is hereby amended and restated in its entirety to read as follows:

“Gold Loan Limit” means the value (as determined in accordance with Section 2.2 hereof) of 23,781 fine troy ounces of Gold.

(d)    The definition of “Maturity Date” appearing in Section 1 of the Precious Metals Agreement is hereby amended and restated in its entirety to read as follows:

“Maturity Date” means September 30, 2016. Any obligations of the Customers under this Agreement which are not paid when due on or before the Maturity Date shall remain subject to the provisions of this Agreement until all Obligations are paid and performed in full.

(e)    The definition of “Senior Credit Agreement” appearing in Section 1 of the Precious Metals Agreement is hereby amended and restated in its entirety to read as follows:

“Senior Credit Agreement” means that certain Second Amended and Restated Credit Agreement, dated as of June 20, 2013, among BEM, Materion Advanced Materials Technologies and Services Netherlands B.V., the other foreign Subsidiary borrowers party thereto from time to time, certain lenders party thereto from time to time, and JPMorgan Chase, N.A., as administrative agent, as may be amended, restated or supplemented, or refinanced or otherwise replaced from time to time. If the Senior Credit Agreement is hereafter amended, refinanced or otherwise replaced (including, without limitation, with an unsecured credit facility), the parties hereto shall negotiate in good faith to make appropriate modifications to this Agreement acceptable to the parties hereto, such that the applicable representations, warranties, agreements, covenants and Events of Default herein conform to their corresponding provisions of such amended, refinanced or replaced credit facility; provided, however, that the Metal Lender will not be required to make any such modifications to the extent they would affect the Applicable

Margin or cause the Metal Lender to surrender, release or otherwise compromise its security interest in the Collateral.

(f)    The definition of “Stored Precious Metal Limit” appearing in Section 1 of the Precious Metals Agreement is hereby amended and restated in its entirety to read as follows:

“Stored Precious Metal Limit” means the least of (a) $60,000,000, (b) the value (as determined in accordance with Section 2.2 hereof) of 30,000 ounces of Gold or the equivalent thereof with respect to any other Precious Metal, and (c) the amount of insurance coverage obtained and in effect from time to time with respect to Stored Precious Metal pursuant to Section 4.7 hereof.

(g)    The second sentence of Section 2.13 of the Precious Metals Agreement is hereby amended and restated in its entirety to read as follows:

ALL SUMS OUTSTANDING AND ALL OBLIGATIONS OUTSTANDING UNDER THE CONSIGNMENT FACILITY WILL BE DUE AND PAYABLE UPON THE EARLIER OF (I) THE OCCURRENCE OF AN EVENT OF DEFAULT AND THE METAL LENDER’S ACCELERATION OF THE OBLIGATIONS AS A RESULT THEREOF, OR (II) THE MATURITY DATE; PROVIDED THAT, IN RESPECT OF ANY CONSIGNMENT WITH A TERM THAT MATURES AFTER THE MATURITY DATE, ALL OBLIGATIONS IN RESPECT THEREOF SHALL BE DUE AND PAYABLE ON THE LAST DAY OF ITS TERM OR THE MATURITY DATE, AS DETERMINED BY THE METAL LENDER IN ITS DISCRETION AND COMMUNICATED TO THE CUSTOMER AGENT IN WRITING AT LEAST 30 DAYS PRIOR TO THE MATURITY DATE.

(h)    Schedule 1 (Approved Locations) of the Precious Metals Agreement is hereby amended and restated in its entirety to read as set forth in Annex I hereto.

(i)    Schedule 7.1 (Collateral) to the Precious Metals Agreement is hereby amended and restated in its entirety to read as set forth in Annex II hereto.

(j)    Schedule 9.12 (Indebtedness) to the Precious Metals Agreement is hereby amended and restated in its entirety to read as set forth in Annex III hereto.

(k)    Schedule 9.14 (Liens) to the Precious Metals Agreement is hereby amended and restated in its entirety to read as set forth in Annex IV hereto.

2.    Representations and Warranties. To induce the Metal Lender to enter into this Amendment, each Customer hereby represents and warrants to the Metal Lender that: (a) such Customer has full power and authority, and has taken all action necessary, to execute and deliver this Amendment and to fulfill its obligations hereunder and to consummate the transactions contemplated hereby; (b) the

making and performance by such Customer of this Amendment do not and will not violate any law or regulation of the jurisdiction of its organization or any other law or regulation applicable to it; (c) this Amendment has been duly executed and delivered by such Customer and constitutes the legal, valid and binding obligation of such Customer, enforceable against it in accordance with its terms, except as enforceability may be limited by bankruptcy, insolvency or similar laws affecting the enforcement of creditors’ rights generally and except as the same may be subject to general principles of equity; and (d) on and as of the date hereof, after giving effect to this Amendment, no Default or Event of Default exists under the Precious Metals Agreement.

3.    Governing Law. This Amendment shall be governed by and construed in accordance with the laws of the State of New York applicable to contracts made and performed in such State.

4.    Integration. The Precious Metals Agreement, as amended hereby, together with the other Precious Metal Documents, is intended by the parties as the final, complete and exclusive statement of the transactions evidenced by the Precious Metals Agreement. All prior or contemporaneous promises, agreements and understandings, whether oral or written, are deemed to be superseded by the Precious Metals Agreement, as amended hereby, and no party is relying on any promise, agreement or understanding not set forth in the Precious Metals Agreement, as amended hereby. The Precious Metals Agreement, as amended hereby, may not be amended or modified except by a written instrument describing such amendment or modification executed by the Customers and the Metal Lender. The parties hereto agree that this Amendment shall in no manner affect or impair the liens and security interests evidenced or granted by the Precious Metals Agreement or in connection therewith.

5.    Ratification. Except as amended hereby, the Precious Metals Agreement shall remain in full force and effect and is in all respects hereby ratified and affirmed.

6.    Signatures. This Amendment may be executed by the parties hereto in several counterparts hereof and by the different parties hereto on separate counterparts hereof, each of which shall be an original and all of which shall together constitute one and the same agreement. Delivery of an executed signature page of this Amendment by electronic transmission shall be effective as an in hand delivery of an original executed counterpart hereof.

IN WITNESS WHEREOF, the undersigned parties have caused this Amendment to be executed by their duly authorized officers as of the date first written above.

The statements set forth in Section 7.1 of the Precious Metals Agreement are subject to the Intercreditor Agreements and any Client-Customer Arrangements.

See Schedule 9.12