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                                                                     Exhibit 10u


                                AMENDMENT NO. 6
                                       TO
            BRUSH WELLMAN INC. SUPPLEMENTAL RETIREMENT BENEFIT PLAN
                         (December 1, 1992 Restatement)
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         Brush Wellman Inc., an Ohio corporation, hereby adopts this Amendment
No. 6 to the Brush Wellman Inc. Supplemental Retirement Benefit Plan (December
1, 1992 Restatement) (the "Plan").

                                       I.

         Sections 4.1 and 4.2 of the Plan are amended by adding to such sections
immediately following the phrase "and the Brush Wellman Inc. Key Employee
Share Option Plan did not exist" in each place such phrase appears therein the
following: "and the Brush Wellman Inc. Executive Deferred Compensation Plan did
not exist".

                                      II.

         Sections 4.1 and 4.2 of Schedule I of the Plan are amended by adding to
such sections immediately following the phrase "and the Brush Wellman Inc. Key
Employee Share Option Plan did not exist" in each place such phrase appears
therein the following: "and the Brush Wellman Inc. Executive Deferred
Compensation Plan did not exist".

                                      III.

         The changes to the Plan made by Section I and Section II of this
Amendment No. 6 shall be effective beginning on the date of execution of this
Amendment No. 6.

         Executed at Cleveland, Ohio this ___ day of _________, 1999


                                                BRUSH WELLMAN INC.



                                                By:___________________________
                                                   Title: