EXHIBIT 4.2 FIRST SUPPLEMENTAL INDENTURE FIRST SUPPLEMENTAL INDENTURE, dated as of November 3, 1998 (this "Supplemental Indenture"), among UCAR Global Enterprises Inc., a Delaware corporation (the "Company"), UCAR International Inc., a Delaware corporation, as Guarantor ("UCAR"), and United States Trust Company of New York, a New York corporation, as Trustee (the "Trustee"). W I T N E S S E T H: WHEREAS, the parties hereto are also the parties to that certain indenture, dated as of January 15, 1995 (the "Indenture"), relating to the 12% Senior Subordinated Notes due 2005 issued by the Company (the "Securities"); WHEREAS, in accordance with Section 9.02 of the Indenture, the parties hereto have agreed to amend, and the registered holders of at least a majority in principal amount at maturity of the Securities outstanding as of the date hereof have consented (the "Requisite Consents") to amendments to, certain terms of the Indenture as described below:; and WHEREAS, all things necessary to make this Supplemental Indenture a valid supplement to the Indenture according to the terms of the Indenture have been done; NOW, THEREFORE, the parties hereto agree as follows: SECTION 1. CERTAIN TERMS DEFINED IN THE INDENTURE. All capitalized terms used herein without definition herein shall have the meanings ascribed thereto in the Indenture. SECTION 2. AMENDMENTS TO THE INDENTURE. The Indenture is hereby amended as follows: (a) The first sentence of the definition of "Consolidated Cash Flow" contained in Section 1.01 of the Indenture is hereby amended to delete the word "and" appearing immediately before clause (vi) and to add a comma immediately following clause (vi) and to add the following new clause (vii) immediately after such added comma and before the word "and" appearing immediately after clause (vi): and (vii) the $340 million charge taken by the Company against results of operations for 1997 for potential liabilities and expenses in connection with antitrust and related lawsuits and claims (b) Section 4.03(f) of the Indenture is hereby amended and restated in its entirety to read as follows: (f) Notwithstanding Section 4.03(b), no Restricted Subsidiary may Incur Indebtedness pursuant to Section 4.03(b) unless (i) either (x) such Restricted Subsidiary is a Foreign Restricted Subsidiary or (y) such Indebtedness is Bank Indebtedness and (ii) at the time of Incurrence of such Indebtedness, and after giving effect thereto, the aggregate outstanding amount of Indebtedness (x) of Foreign Restricted Subsidiaries Incurred pursuant to Section 4.03(c)(ii), together with the aggregate outstanding amount of Indebtedness of Foreign Restricted Subsidiaries Incurred pursuant to Section 4.03(b) (excluding Bank Indebtedness described in clause (y) of clause (i) of this Section 4.03(f)), shall not exceed the aggregate amount of Indebtedness of Foreign Restricted Subsidiaries that is outstanding immediately following the Issue Date pursuant to Section 4.03(c)(ii) and (y) that is Bank Indebtedness (including Indebtedness Incurred pursuant to Section 4.03(c)(i) or 4.03 (c)(ii)) shall not exceed $830 million; provided, however, that Indebtedness of any Foreign Restricted Subsidiary Incurred pursuant to Section 4.03(b) or 4.03(c)(ii) shall not be subordinated in right of payment to any other Indebtedness of such Foreign Restricted Subsidiary. For purposes of this amendment and restatement of Section 4.03(f), the $695 million mentioned in the definition of Credit Agreement shall not be construed to limit the amount of Bank Indebtedness which may be Incurred under Section 4.03(f) and the Company and its Restricted Subsidiaries shall replace the Issuer mentioned in the definition of Bank Indebtedness. (c) Section 4.03(c)(vi) is hereby amended by adding the following language at the end of such clause after the word "million": "and provided that no more than $25 million of Bank Indebtedness Incurred pursuant to this Section 4.03(c)(vi) may be outstanding at any one time." SECTION 3. GOVERNING LAW. This Supplemental Indenture shall be governed by, and construed in accordance with, the laws of the State of New York but without giving effect to applicable principles of conflicts of law to the extent that the application of the laws of another jurisdiction would be required thereby. SECTION 4. COUNTERPARTS. This Supplemental Indenture may be signed in any number of counterparts, each of which shall be an original, with the same effect as if the signatures thereto and hereto were upon the same instrument. SECTION 5. RATIFICATION. Except as expressly amended hereby, each provision of the Indenture shall remain in full force and effect and, as amended hereby, the Indenture is in all respects ratified and confirmed by each of the Company, UCAR and the Trustee. 2 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed as of the date first above written. UCAR INTERNATIONAL INC. By:__________________________________ Title: UCAR GLOBAL ENTERPRISES INC. By:__________________________________ Title: UNITED STATES TRUST COMPANY OF NEW YORK, as Trustee By:__________________________________ Title: 3