EXHIBIT 4.5


                          FIRST SUPPLEMENTAL INDENTURE

     FIRST SUPPLEMENTAL INDENTURE, dated as of April 30, 2002 (this
"SUPPLEMENTAL INDENTURE"), among UCAR Finance Inc., a Delaware corporation (the
"COMPANY"), UCAR International Inc., UCAR Global Enterprises Inc., UCAR Carbon
Company Inc., UCAR Composites Inc., UCAR Carbon Technology LLC, UCAR Holdings
III Inc. and UCAR International Trading Inc. (collectively, the "GUARANTORS"),
and State Street Bank and Trust Company, a trust company organized under the
laws of the Commonwealth of Massachusetts, as Trustee (the "TRUSTEE").


                              W I T N E S S E T H:

     WHEREAS, the parties entered into the Indenture, dated as of February 15,
2002 (the "INDENTURE"), among the Company, the Guarantors, UCAR International
Holdings Inc. ("UCAR INTERNATIONAL HOLDINGS") and the Trustee relating to
$400,000,000 of 10 1/4% Senior Notes due 2012 issued by the Company (the
"SECURITIES");

     WHEREAS, all capitalized terms used herein without definition herein shall
have the meanings ascribed thereto in the Indenture;

     WHEREAS, UCAR International Holdings was dissolved, and its assets were
transferred to UCAR Carbon Company Inc., in March 2002;

     WHEREAS, the Company wishes to issue up to $150,000,000 in Additional
Securities pursuant to the Indenture (the "NEW SECURITIES");

     WHEREAS, the Company conducted a consent solicitation to provide for
amendments to the Indenture waiving the application of Section 2.13 of the
Indenture in connection with the issuance of the New Securities so that the
Company would not be required to use the gross proceeds from the sale of the New
Securities to make Intercompany Loans to Foreign Restricted Subsidiaries;

     WHEREAS, the registered holders of a majority in principal amount at
maturity of the Securities outstanding as of the record date established for
such consent solicitation have consented to such amendments so long as the
proceeds from the issuance of the New Securities are used as described in the
Consent Solicitation Statement, dated April 23, 2002, of the Company;

     WHEREAS, Section 9.01 of the Indenture permits the Company, the Guarantors
and the Trustee to amend the Indenture without notice to or consent of any
Securityholder to, among other things, cure any ambiguity, omission, defect or
inconsistency or to make any change that does not adversely affect the rights of
any Securityholder; and




     WHEREAS, all things required to be done 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 agree as follows:

     SECTION 1. AMENDMENTS TO THE INDENTURE. The Indenture is hereby amended as
follows:

          (a)   There shall be added a new definition of "New Securities" to
Section 1.01 of the Indenture, as follows:

                "New Securities" means up to $150,000,000 of Additional
          Securities issued after the date of this Supplemental Indenture.

          (b)   Paragraph (8) of the definition of "Permitted Liens" in Section
1.01 of the Indenture is hereby amended and restated in its entirety as follows:

                (8)  Liens existing on the Issue Date and Liens created to
          secure the Securities;

          (c)   The first sentence of Section 2.13 of the Indenture is hereby
amended and restated in its entirety as follows:

                The Company shall be entitled, subject to its compliance with
          Section 4.03, to issue Additional Securities under this Indenture
          which shall have identical terms as the Initial Securities issued on
          the Issue Date, other than with respect to the date of issuance and,
          if appropriate, the issue price; PROVIDED, HOWEVER, that the Company
          makes one or more Intercompany Loans equal to the gross proceeds of
          such Additional Securities (other than the New Securities) to one or
          more Foreign Restricted Subsidiaries.

          (d)   Section 4.14(b) of the Indenture is hereby amended and restated
in its entirety as follows:

                (b)    UCAR International shall cause UCAR Electrodos, after the
          completion of the Realignment insofar as the Realignment relates to
          it, and UCAR S.p.A., after the repayment of the Secured Intercompany
          Note issued by it, and each Foreign Restricted Subsidiary that
          receives an Intercompany Loan from the sale of Additional Securities
          from the Company to, at the time of such completion, repayment, or
          receipt, respectively, execute and deliver to the Company an
          Intercompany Note in the principal amount equal to the principal
          amount of its Secured Intercompany Note at such time or the portion of
          the gross proceeds received by such Foreign Restricted Subsidiary,
          respectively. Until the proceeds received by the Company on the Issue
          Date are loaned in the form of an Intercompany Loan to UCAR Electrodos
          and UCAR S.p.A. in


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          an aggregate amount equal to the principal amount of their respective
          Secured Intercompany Notes, such proceeds shall be invested only in
          Temporary Cash Investments or used to reduce the Company's borrowings
          under the Revolving Credit Facility; provided that at least $31.0
          million of capacity shall be retained and not drawn under the
          Revolving Credit Facility during such period. The Company shall, at
          the same time that such an Intercompany Note is issued to it, pledge
          and deliver to the Trustee such Intercompany Note, subject to the
          limitation that at no time will the combined value of the pledged
          portion of any Foreign Restricted Subsidiary's Intercompany Note and
          Intercompany Note Guarantee exceed 19.99% of the principal amount of
          the then outstanding Securities. The Company shall use its
          commercially reasonable best efforts (1) to complete the Realignment
          as it relates to UCAR Electrodos and (2) to cause UCAR S.p.A. to repay
          the Secured Intercompany Note issued by UCAR S.p.A., in each case,
          within 90 days after the Issue Date.

          (e)   The following sentence is hereby added at the end of Section
5.01(c) of the Indenture:

                The foregoing limitation shall not prohibit any pledge of
          assets of any Subsidiary Guarantor or Intercompany Note Obligor, as
          the case may be, under the Credit Agreement or this Indenture.

          (f)   The first sentence of Section 4 of the Rule 144A/Regulation S
Appendix to the Indenture (entitled "Provisions Relating to Initial Securities,
Private Exchange Securities and Exchange Securities") is hereby amended and
restated in its entirety as follows:

                The Company issued the Securities under an Indenture dated as of
          February 15, 2002, as supplemented by the First Supplemental Indenture
          dated as of April 30, 2002 (as so supplemented, the "INDENTURE"),
          among the Company, the Guarantors and the Trustee.

          (g)   Exhibit 1 to the Indenture, the form of supplemental indenture
for future guarantors referenced in the definition of "Guaranty Agreement"
contained in Section 1.01 of the Indenture ("EXHIBIT 1"), is hereby amended
as follows:

                (i)     The first "whereas" clause contained in Exhibit 1 is
hereby amended and restated in its entirety as follows:

                        WHEREAS, the Company and the other Guarantors have
                heretofore executed and delivered to the Trustee an indenture,
                dated as of February 15, 2002, as supplemented by the first
                supplemental indenture, dated as of April 30, 2002 (as so
                supplemented and as the same may be further amended or
                supplemented, the "INDENTURE"), providing for the issuance of an
                aggregate principal amount of $400,000,000 of 10 1/4% Senior

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                Notes due 2012 (the "INITIAL NOTES") and an additional aggregate
                principal amount of up to $150,000,000 of 10 1/4% Senior Notes
                due 2012 (the "NEW NOTES" and, together with the Initial Notes,
                the "NOTES");

                (ii) Exhibit 1 is hereby amended to delete the signature block
for UCAR International Holdings.

          (h)   Exhibit 2 to the Indenture, the form of intercompany note
referenced in the definition of "Intercompany Note" contained in Section 1.01 of
the Indenture ("EXHIBIT 2"), is hereby amended as follows:

                (i)     Section 3 of Exhibit 2 to the Indenture is hereby
amended and restated in its entirety as follows:

                         SECTION 3. PREPAYMENTS. This Intercompany Note shall
                not be prepayable by the Payor, except in accordance with the
                Indenture dated as of February 15, 2002, as supplemented by the
                First Supplemental Indenture dated as of April 30, 2002 (as so
                supplemented and as the same may be further amended or
                supplemented, the "INDENTURE"), among the Payee, the Guarantors
                named therein and State Street Bank and Trust Company, as
                Trustee, relating to the issuance by the Payee of $400,000,000
                of 10 1/4% Senior Notes due 2012 (the "Initial Notes") and the
                issuance by the Payee of up to an additional $150,000,000 of
                10 1/4% Senior Notes due 2012 (the "NEW NOTES" and, together
                with the Initial Notes, the "NOTES");

                (ii)    All references in Exhibit 2 to "Senior Notes" are hereby
amended to refer to "Notes".

     SECTION 2. TERMINATION OF GUARANTY OF UCAR INTERNATIONAL HOLDINGS. The
parties acknowledge that when it dissolved, UCAR International Holdings ceased
to be a Subsidiary Guarantor under, and party to, the Indenture, and was
released from all obligations under Article 10 of the Indenture, without any
further action required on the part of the Trustee or any Holder, in accordance
with the second paragraph of Section 10.06 of the Indenture.

     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.



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     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,
the Guarantors and the Trustee.

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     IN WITNESS WHEREOF, the parties have caused this Supplemental Indenture to
be duly executed as of the date first above written.

                                   UCAR FINANCE INC.,

                                   by
                                     /s/ Corrado F. De Gasperis
                                     ----------------------------------
                                     Name:  Corrado F. De Gasperis
                                     Title: Vice President, Chief
                                            Financial Officer and Chief
                                            Information Officer

                                   UCAR INTERNATIONAL INC.,

                                   by
                                     /s/ Corrado F. De Gasperis
                                     ----------------------------------
                                     Name:    Corrado F. De Gasperis
                                     Title:   Vice President, Chief
                                              Financial Officer and Chief
                                              Information Officer

                                   UCAR GLOBAL ENTERPRISES INC.,

                                   by
                                     /s/ Corrado F. De Gasperis
                                     ----------------------------------
                                     Name:   Corrado F. De Gasperis
                                     Title:  Vice President, Chief
                                             Financial Officer and Chief
                                             Information Officer

                                   UCAR CARBON COMPANY INC.,

                                   by
                                     /s/ Corrado F. De Gasperis
                                     ----------------------------------
                                     Name:   Corrado F. De Gasperis
                                     Title:  Vice President, Chief
                                             Financial Officer and Chief
                                             Information Officer

                                    UCAR COMPOSITES INC.,

                                    by
                                      /s/ Scott Mason
                                      -----------------------------------------
                                      Name:  Scott C. Mason
                                      Title: Chief Executive Officer




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                                    UCAR CARBON TECHNOLOGY LLC.,

                                    by
                                      /s/ Corrado F. De Gasperis
                                      -------------------------------------
                                      Name:  Corrado F. De Gasperis
                                      Title: Vice President, Chief
                                             Financial Officer and Chief
                                             Information Officer

                                    UCAR HOLDINGS III INC.,

                                    by
                                      /s/ Corrado F. De Gasperis
                                      ----------------------------------
                                      Name:  Corrado F. De Gasperis
                                      Title: Vice President, Chief
                                             Financial Officer and Chief
                                             Information Officer

                                    UCAR INTERNATIONAL TRADING INC.,

                                    by
                                       /s/ Corrado F. De Gasperis
                                       ----------------------------------
                                       Name:  Corrado F. De Gasperis
                                       Title: Vice President, Chief
                                              Financial Officer and Chief
                                              Information Officer

                                    STATE STREET BANK AND TRUST
                                     COMPANY, as Trustee

                                     by
                                       /s/ Patrick E. Thebado
                                       -----------------------------------------
                                       Name:  Patrick E. Thebado
                                       Title: Vice President











[Signature Page to First Supplemental Indenture]



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