Document:

<PAGE>   1
                                                                    EXHIBIT (4h)

            FOURTH AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT

                  THIS FOURTH AMENDMENT TO AMENDED AND RESTATED CREDIT
AGREEMENT, dated as of September 30, 1999 ("Amendment"), by and among Brush
Wellman Inc., an Ohio corporation ("Borrower"), the banks that are parties to
this Amendment (the "Banks"), and National City Bank, as agent for the Banks (in
that capacity, "NCB-Agent"),

                                WITNESSETH THAT:

                  WHEREAS, Borrower, the Banks and NCB-Agent entered into an
Amended and Restated Credit Agreement, dated as of December 13, 1994, as amended
by a First Amendment to Amended and Restated Credit Agreement dated December 30,
1996, by a Second Amendment to Amended and Restated Credit Agreement dated
September 2, 1997 and by a Third Amendment to Amended and Restated Credit
Agreement dated January 26, 1999 (together with all Exhibits and Schedules
thereto, the "Credit Agreement"), under which the Banks, subject to certain
conditions, agreed to lend to Borrower up to $55,000,000 from time to time in
accordance with the terms thereof; and

                  WHEREAS, the parties desire to amend the Credit Agreement as
set forth herein;

                  NOW, THEREFORE, in consideration of the premises and the
mutual covenants and agreements contained herein, the parties hereto agree as
follows:

                  1.       Effect of Amendment; Definitions.

                  The Credit Agreement shall be and hereby is amended as
provided in Section 2 hereof. Except as expressly amended in Section 2 hereof,
the Credit Agreement shall continue in full force and effect in accordance with
its respective provisions on the date hereof. As used in the Credit Agreement,
the terms "Credit Agreement", "Agreement", "this Agreement", "herein",
"hereinafter", "hereto", "hereof", and words of similar import shall, unless the
context otherwise requires, mean the Credit Agreement as amended and modified by
this Amendment.

                  2.       Amendments.

                  (A) Subsection 2A.01 of the Credit Agreement shall be amended
by deleting the same and substituting in lieu thereof the following:

                  "2A.01 AMOUNTS. The aggregate amount of the Subject
Commitments shall be fifty five million dollars ($55,000,000), but that amount
may be reduced from time to time pursuant to subsection 2A.03 and the Subject
Commitments may be terminated pursuant to Section 5B. The amount of each Bank's
Subject Commitment (subject to such reduction or termination), and the
proportion (expressed as a percentage) that it bears to all of the Subject
Commitments, is set forth opposite the Bank's name below, to-wit:

                  $15,000,000       27.275%  National City Bank
                  $10,000,000        18.18%  Fifth Third Bank, Northeastern Ohio
                  $15,000,000       27.275%  Bank One, Michigan
                  $ 5,000,000         9.09%  Firstar Bank, N.A.
                  $10,000,000        18.18%  Harris Trust and Savings Bank
                  -----------                -----------------------------------
                  $55,000,000                        Total"

                                                                          Page 1

<PAGE>   2
                  (B) Subsection 2A.04(b) of the Credit Agreement shall be
amended by deleting the table in the definition of "Applicable Rate" in the
first paragraph therein and substituting the following in lieu thereof:

<TABLE>
<CAPTION>
If the Ratio of the Companies' Funded
Indebtedness to the Companies' EBITDA is:            The Applicable Rate is:
<S>                                                  <C>
         Less than 4.25 to 1.00, but greater
         than or equal to 4.00 to 1.00                        0.45%

         Less than 4.00 to 1.00, but greater
         than or equal to 3.50 to 1.00                       0.375%

         Less than 3.50 to 1.00, but greater
         than or equal to 3.00 to 1.00                        0.30%

         Less than 3.00 to 1.00                               0.25%
</TABLE>

                  (From October 1, 1999, until changed hereunder in accordance
with the following provisions, the Applicable Rate will be 0.45% per annum.)"

                  (C) Subsection 2B.09(a) of the Credit Agreement shall be
amended by deleting the table in the definition of "Applicable Margin" in the
first paragraph therein and substituting the following in lieu thereof:

<TABLE>
<CAPTION>
If the Ratio of the Companies' Funded
Indebtedness to the Companies' EBITDA is:            The Applicable Margin is:
<S>                                                  <C>
         Less than 4.25 to 1.00, but greater
         than or equal to 4.00 to 1.00                          1.375%

         Less than 4.00 to 1.00, but greater
         than or equal to 3.50 to 1.00                          1.125%

         Less than 3.50 to 1.00, but greater
         than or equal to 3.00 to 1.00                          1.00%

         Less than 3.00 to 1.00, but greater
         than or equal to 2.50 to 1.00                          0.75%

         Less than 2.50 to 1.00                                 0.50%
</TABLE>

                  (From October 1, 1999, until changed hereunder in accordance
with the following provisions, the Applicable Rate will be 1.375% per annum.)"

                  (D) Subsection 3B.02 of the Credit Agreement shall be amended
by deleting the same and substituting in lieu thereof the following:

                  "3B.02 LEVERAGE. Borrower will not suffer or permit the
Companies' Funded Indebtedness at any time to exceed an amount equal to the
Leverage Multiplier (as

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<PAGE>   3
hereinafter defined) times the Companies' EBITDA for the four consecutive fiscal
quarters most recently ended, all as determined on a consolidated basis. As used
herein, "Leverage Multiplier" means (i) from April 1, 1999, to September 30,
1999, inclusive, 4.25, (ii) from October 1, 1999, to December 31, 1999,
inclusive, 4.00, (iii) from January 1, 2000, to March 31, 2000, inclusive, 3.75,
(iv) from April 1, 2000, to June 30, 2000, inclusive, 3.50, (v) from July 1,
2000, to December 31, 2000, inclusive, 3.25, and (vi) on and after January 1,
2001, 3.00."

                  (E) Subsection 3D.01(iv) of the Credit Agreement shall be
amended by deleting the same and substituting in lieu thereof the following:

                  "(iv) any guaranty by Borrower of indebtedness of any Company
         otherwise permitted by this Agreement and any guaranty by Borrower or
         any Company of any obligations of any other Company that deals in
         precious metals under any consignment arrangement that is permitted
         under Subsection 3D.03(a),"

                  (F) Subsection 3D.03(a) of the Credit Agreement shall be
amended by deleting the same and substituting in lieu thereof the following:

                  "(a) lease any property as lessee or acquire or hold any
                  property subject to any land contract, inventory consignment
                  (except for any precious metals inventory of a Company that
                  deals in precious metals that is subject to any consignment
                  arrangement or consignment arrangements that are approved by
                  NCB-Agent, which approval will not be unreasonably withheld,
                  and only so long as the aggregate value, in United States
                  Dollars, of the precious metals subject thereto does not
                  exceed an amount greater than $75,000,000 at any time), or
                  other title retention contract,"

                  (G) Exhibits E to the Credit Agreement is hereby deleted and
Exhibit E attached to this Amendment is substituted in lieu thereof.

                  3. Substitution of Banks. Borrower and each of the Banks that
are parties to this Amendment hereby acknowledge and agree that by virtue of the
execution and delivery of this Amendment, together with appropriate assignment
agreements, and as of the date hereof (a) one-half of the Subject Commitment of
Bank One, NA has been assigned to Bank One, Michigan, formerly known as NBD
Bank, and one-half has been assigned to Firstar Bank, N.A., and (b) Firstar
Bank, N.A., will become a Bank that is a party to the Credit Agreement as
provided in Subsection 2A.01.

                  4. Representations and Warranties.

                  (A) Borrower hereby represents and warrants to the Banks and
NCB-Agent that all representations and warranties set forth in the Credit
Agreement, as amended hereby, are true and correct in all material respects, and
that this Amendment and the Subject Notes delivered in connection with this
Amendment have been executed and delivered by a duly authorized officer of
Borrower and constitute the legal, valid and binding obligation of Borrower,
enforceable against Borrower in accordance with their respective terms.

                  (B) The execution, delivery and performance by Borrower of
this Amendment and its performance of the Credit Agreement and the Subject Notes
delivered in connection with this Amendment have been authorized by all
requisite corporate action and will

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<PAGE>   4
not (1) violate (a) any order of any court, or any rule, regulation or order of
any other agency of government, (b) the Articles of Incorporation, the Code of
Regulations or any other instrument of corporate governance of Borrower, or (c)
any provision of any indenture, agreement or other instrument to which Borrower
is a party, or by which Borrower or any of its properties or assets are or may
be bound; (2) be in conflict with, result in a breach of or constitute, alone or
with due notice or lapse of time or both, a default under any indenture,
agreement or other instrument referred to in (1)(c) above; or (3) result in the
creation or imposition of any lien, charge or encumbrance of any nature
whatsoever.

                  5. Miscellaneous.

                  (A) This Amendment shall be construed in accordance with and
governed by the laws of the State of Ohio, without reference to principles of
conflict of laws. Borrower agrees to pay to the Banks at the time this Amendment
is executed and delivered by the Banks an amendment fee in an aggregate amount
equal to $55,000, to be allocated pro rata among the Banks on the basis of their
respective Subject Commitments immediately after this Amendment is executed and
delivered by the Banks, and to pay on demand all costs and expenses of the Banks
and NCB-Agent, including reasonable attorneys' fees and expenses, in connection
with the preparation, execution and delivery of this Amendment.

                  (B) The execution, delivery and performance by the Banks and
NCB-Agent of this Amendment and the Subject Notes executed in connection
herewith shall not constitute, or be deemed to be or construed as, a waiver of
any right, power or remedy of the Banks or NCB-Agent, or a waiver of any
provision of the Credit Agreement. None of the provisions of this Amendment
shall constitute, or be deemed to be or construed as, a waiver of any "Default
under this Agreement" or any "Event of Default," as those terms are defined in
the Credit Agreement.

                  (C) This Amendment may be executed in two or more
counterparts, each of which shall constitute an original, but all of which, when
taken together, shall constitute but one instrument.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

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<PAGE>   5
                  IN WITNESS WHEREOF, the parties have caused this Amendment to
be duly executed as of the day and year first above written.

<TABLE>
<CAPTION>
<S>                                                  <C>
Address:                                             BRUSH WELLMAN INC.
         17876 St. Clair Avenue
         Cleveland, Ohio 44110
         Fax:  (216) 481-2523                        By:      /s/ Michael C. Hasychak
                                                     Title:   Treasurer and Secretary

Address:                                             NATIONAL CITY BANK,
Deliveries:                                          for itself and as Agent
         Large Corporate Division
         1900 East Ninth Street
         Cleveland, Ohio 44114-3484                  By:      /s/ Janice E. Focke
         Fax:  (216) 222-0003                        Title:   Vice President

Mail:
         Large Corporate Division, Loc. #2077
         P.O. Box 5756
         Cleveland, Ohio 44101

Address:                                             FIFTH THIRD BANK, NORTHEASTERN OHIO

         1404 East Ninth Street
         Cleveland, Ohio 44114                       By:      /s/ James P. Byrnes
         Fax:  (216) 274-5507                        Title:   Vice President

Address:                                             BANK ONE, MICHIGAN

         611 Woodward
         Detroit, Michigan 48226                     By:      /s/ Patrick F. Dunphy
         Fax:  (313) 225-1212                        Title:   Vice President

Address:                                             HARRIS TRUST AND SAVINGS BANK

         P.O. Box 755 (111/10W)
         Chicago, Illinois 60690-0755                By:      /s/ Thad D. Rasche
         Fax:  (312) 461-5225                        Title:   Vice President

Address:                                             FIRSTAR BANK, N.A.

         1350 Euclid Avenue, ML 4432
         Cleveland, Ohio 44115                       By:      /s/ John D. Barrett
         Fax:  (216) 623-9280                        Title:   Senior Vice President
</TABLE>

                                                                          Page 5
<PAGE>   6
                                    EXHIBIT E

                                COMPLIANCE REPORT

                                                               ___________, 19__

To:      National City Bank

Subject:          Amended and Restated Credit Agreement dated as of December 13,
                  1994, as amended, with the Banks that are parties thereto and
                  National City Bank as agent (the "Credit Agreement")

Greetings:

Pursuant to subsection 3A.01 of the subject Credit Agreement and in my capacity
as the chief financial officer of Brush Wellman Inc., I hereby certify that to
the best of my knowledge and belief

         (a) the financial statements of the Companies accompanying this letter
         are true and complete and fairly present in all Material respects their
         consolidated financial condition as of _____________________, _____
         (the "Closing Date") and the consolidated results of their operations
         for the fiscal period then ending,

         (b) no Default under the Credit Agreement exists *[except for those
         which, together with our intentions in respect thereof, are set forth
         in Exhibit One to this letter] and

         (c) as indicated by the calculations below, the Companies are *[not] in
         full compliance with subsections 3B.01 through 3B.04, both inclusive.

         [* - In (b) and (c), delete the bracketed language if inapplicable.]

3B.01 The actual amount of the Companies' Tangible Net Worth at the Closing Date
is equal to or is greater than the required amount.

                   $190,731,000
       plus        $__________ 40% of     $_________

annual earnings accumulated from December 31, 1997 to the end of the preceding
fiscal year (see Section 3B.01)

       sum         $__________      required amount
                   $__________      actual Tangible Net Worth

3B.02 The Funded Indebtedness of the Companies does not exceed an amount equal
to the Leverage Multiplier times the Companies' EBITDA for the four consecutive
fiscal quarters most recently ended -- the Leverage Multiplier being (i) from
April 1, 1999, to September 30, 1999,

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<PAGE>   7
inclusive, 4.25, (ii) from October 1, 1999, to December 31, 1999, inclusive,
4.00, (iii) from January 1, 2000, to March 31, 2000, inclusive, 3.75, (iv) from
April 1, 2000, to June 30, 2000, inclusive, 3.50, (v) from July 1, 2000, to
December 31, 2000, inclusive, 3.25, and (vi) on and after January 1, 2001, 3.00.

                  $______________           Funded Indebtedness
divided by        $______________           EBITDA
                  $______________           EBIT
                  $______________           Depreciation
                  $______________           Amortization

quotient          _______________

3B.03  [Intentionally Omitted]

3B.04 The actual Interest Coverage Ratio is greater than the minimum factor
(5:00 to 1:00) required, the Interest Coverage being a factor equal to the
quotient of the sum of items (a), (b) and (c) below divided by item (b).

         (a) $__________  Net Income
plus     (b) $__________  interest expense (including any required
                               capitalized interest)
plus     (c) $__________  income taxes
sum      (d) $__________  total
quotient (e)  __________  Actual Interest Coverage--(d)/(b)

3B.05 The actual Funded Debt of the Companies is equal to or less than the
maximum factor permitted, namely, 0.5 through December 31, 2000, and 0.45 on and
after January 1, 2001-- the Funded Debt being a factor equal to the quotient of
Funded Indebtedness divided by Funded Indebtedness plus Tangible Net Worth.

                    $_________      Funded Indebtedness
         divided by $_________      Funded Indebtedness plus Tangible Net Worth
         quotient    _________      Actual Funded Indebtedness

                               BRUSH WELLMAN INC.

                                         By:______________________________
                                         Title: ____________________________

                                                                          Page 7<PAGE>   1
                                                                   Exhibit 10ff

                              EMPLOYMENT AGREEMENT

           This EMPLOYMENT AGREEMENT (this "Agreement"), entered into this
_______ day of ____________, by BRUSH WELLMAN INC., an Ohio corporation (the
"Company"), and ___________________ (the "Executive").

                                   WITNESSETH:

     WHEREAS, the Board of Directors of the Company (the "Board") has made the
following determinations:

           A.  The Executive is a senior executive of the Company and is
expected to make major contributions to the growth, profitability, and
financial strength of the Company;

           B.  The Board wishes to assure the Company's continuity of
management;

           C. The Board recognizes that, as is the case with many publicly held
companies, the possibility of a Change in Control (as defined in Section IV) may
exist and wishes to ensure that the Company's senior executives are not
practically disabled from discharging their duties upon the occurrence of any
actual or threatened Change in Control; and

           D. This Agreement shall not alter materially the remuneration and
benefits which the Executive could reasonably expect to receive from the Company
in the absence of a Change in Control and, accordingly, although effective as of
the date hereof, this Agreement shall become operative only upon the occurrence
of a Change in Control during the Term (as defined in Section II).
<PAGE>   2
           NOW, THEREFORE, the Company and the Executive agree as follows:

                 I.  Employment; Position and Responsibilities

           (A) Subject to the terms and conditions of this Agreement, upon the
occurrence of a Change in Control during the Term, the Company, if the Executive
is then an employee of the Company, shall continue the Executive in its employ
(and the Executive shall remain in the employ of the Company) for the Window
Period (as defined in Section III), whether or not the Term ends before the end
of the Window Period, in the position which he holds at the time of such Change
in Control (or such enhanced position to which he may from time to time
thereafter be elected by the Board) and with substantially the same duties,
responsibilities, and reporting relationships as he has at the time of such
Change in Control (or such enhanced duties, responsibilities, and reporting
relationships as the Board may from time to time thereafter designate in writing
or to which the Company and the Executive may from time to time thereafter agree
in writing).

           (B) During the Window Period, the Executive shall, while he is an
employee of the Company, devote substantially all of his time during normal
business hours to the business and affairs of the Company, but nothing in this
Agreement shall preclude the Executive during the Window Period from devoting
reasonable periods of time during normal business hours to serving as a
director, trustee, or member of any committee of any organization or business so
long as such activity would not constitute Competitive Activity (as defined in
Section XIII) if conducted by the Executive after any termination of the
Executive's employment with the Company pursuant to Section VII(A).

                  II.  Effectiveness of this Agreement; Term

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           In determining whether the Window Period commences, this Agreement
shall be effective immediately upon execution and shall continue in force for a
period of five years (the "Term") from the date of such execution; provided,
however, that on the date five years after this Agreement is executed, and on
each second anniversary of such date thereafter, the Term shall be automatically
extended for two additional years unless either the Company or the Executive has
given written notice to the other, as provided in Section X, prior to the date
which is two years before the date on which the Term would end if not
automatically extended.

               III.  Operation of this Agreement; Window Period

           This Agreement shall become operative only upon the occurrence of a
Change in Control and then only if such Change in Control occurs prior to the
end of the Term while the Executive is an employee of the Company. If the
Executive is employed by the Company at the time of any such Change in Control,
this Agreement shall remain operative for a period (the "Window Period") of four
years after the occurrence of such Change in Control or, if shorter, until the
Executive reaches age 65.

                       IV. Definition of Change in Control

           A "Change in Control" of the Company shall have occurred if at any
time during the Term any of the following events shall occur:

            (A) The Board at any time shall fail to include a majority of
Directors who are either "Original Directors" or "Approved Directors". An
Original Director is a Director who is serving on February 20, 1989. An Approved
Director is a Director who, after such date, is elected, or is nominated for
election by the shareholders, by a vote of at least two-thirds of the Original
Directors and the previously elected Approved Directors, if any.

           (B) Any person (as the term "person" is defined in Section 1701.01(G)
of the Ohio Revised Code) shall have made a "control share acquisition" (as the
term "control share

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<PAGE>   4
acquisition" is defined in Section 1701.01(Z) of the Ohio Revised Code) of
shares of the Company without having first complied with Section 1701.831 of the
Ohio Revised Code (dealing with control share acquisitions).

           (C) The Board shall at any time during the Term determine in the good
faith exercise of its judgment that (1) any particular actual or proposed
accumulation of shares of the Company, tender offer for shares of the Company,
merger, consolidation, sale of assets, proxy contest, or other transaction or
event or series of transactions or events will, or is likely to, if carried out,
result in a Change in Control falling within Section IV(A) or IV(B) and (2) it
is in the best interests of the Company and its shareholders, and will serve the
intended purposes of this Agreement, if this Agreement shall thereupon become
immediately operative.

             V.  Compensation While Employed During Window Period

           (A) No compensation shall be payable under this Section V unless and
until there shall have been a Change in Control while the Executive is an
employee of the Company during the Term (at which time the Window Period shall
begin).

           (B) If such a Change in Control so occurs (at which time the Window
Period shall begin), the Executive, while an employee of the Company, will be
entitled to receive compensation, for the Window Period, in the following forms,
rates, and amounts:

            (1)  Base Salary:  salary payments (semi-monthly in arrears) at
     an annual rate which will be the highest of:

                 (a)  the annual rate in effect at the time of the Change in
           Control;

                 (b) the annual rate in effect at any time during the 24 months
           prior to the Change in Control; or

                 (c) the annual rate approved by the Board from time to time
           after the Change in Control.

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<PAGE>   5
           (2) Annual Bonus: annual bonus amounts (payable on February 10, or,
     if February 10 is not a business day in any year, then on the business day
     next preceding such February 10) with respect to the previous calendar year
     equal to the higher of:

                 (a) the highest annual bonus awarded to the Executive in the 36
           months prior to the Change in Control; or

                 (b) the highest annual bonus approved by the Board from time to
           time after the Change in Control.

           (3) Benefit Plans - The Executive shall continue, as if there had
     been no Change in Control, to participate, throughout the Window Period, in
     all benefit plans, policies, or arrangements of the Company in which the
     Executive participates immediately prior to the Change in Control,
     including, without limitation, any incentive, retirement income, savings or
     thrift, stock option, stock purchase, stock appreciation, stock grant,
     group insurance (health, life, and others, if any), disability, salary
     continuation, and other employee benefit plans, policies, or arrangements,
     or any successor plans, policies, or arrangements that may thereafter be
     adopted by the Company and provide the Executive at least the same reward
     opportunities that were provided to him immediately prior to the Change in
     Control as if there had been no Change in Control.

           (4) Executive Perquisites - The Executive shall continue to receive,
     throughout the Window Period, all executive perquisites (including, without
     limitation, a Company automobile, club dues, and secretarial services)
     provided by the Company immediately prior to the Change in Control and any
     improvements therein which are thereafter approved by the Board from time
     to time.

           (5) Nothing in this Agreement shall preclude improvement of the
     plans, policies, or arrangements contemplated by the foregoing paragraphs
     (1)-(4) of this Section V(B), but no such improvements shall in any way
     diminish any other obligation of the Company under this Agreement. If the
     Company shall change or terminate any such plans,

                                       5
<PAGE>   6
policies, or arrangements during the Window Period, it shall nevertheless
continue to provide to the Executive other arrangements which are substantially
comparable thereto.

             VI.  Termination While Employed During Window Period

           (A) If a Change in Control shall occur while the Executive is an
employee of the Company during the Term (and the Window Period therefore
commences), the Executive shall be entitled to the compensation provided in
Section VII if his employment with the Company is thereafter terminated during
the Window Period unless such termination results from the Executive's

           (1)  death;

           (2) disability (on the terms described in Section VI(B));

           (3)  retirement (as defined in Section VI(C));

           (4) termination by the Company for Cause (as defined in Section
     VI(D); or

           (5) decision to terminate his employment other than for Good Reason
     (as defined in Section VI(E)).

           (B) If, as a result of the Executive's incapacity due to physical or
mental illness, the Executive shall qualify for benefits under the long-term
disability plan, policy, or arrangement (if any) of the Company in effect at the
time when the Change in Control occurs and shall have been absent from his
duties with the Company on a full-time basis during the Window Period for a
continuous period of one year, then the Company may terminate the Executive's
employment for disability without the Executive being entitled to the
compensation provided in Section VII.

           (C) "Retirement" means the attainment by the Executive of age 65 or
his earlier voluntary retirement in accordance with any applicable retirement
plan of the Company. Voluntary retirement for this purpose does not include any
retirement decision made by the

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<PAGE>   7
Executive as a consequence of a termination by the Executive of his employment
for Good Reason.

           (D) "Cause" means commission by the Executive of an act which
constitutes a felony.

           (E) The Executive may terminate his employment for Good Reason during
the Window Period and, if he does so, he shall be entitled to the compensation
provided in Section VII. "Good Reason" shall mean any of the following:

           (1) any reduction in the Executive's base salary provided in Section
     V(B)(1) or his annual bonus provided in Section V(B)(2);

           (2) any significant reduction in the Executive's benefits provided in
     Section V(B)(3) or his perquisites provided in Section V(B)(4);

           (3) any significant reduction in the Executive's title, status,
     position, responsibilities, duties, or reporting relationships as herein
     provided;

           (4) any determination made by the Executive in good faith that, as a
     consequence of the circumstances giving rise to a Change in Control or
     resulting therefrom, he is unable to carry out the responsibilities,
     duties, or reporting relationships associated with his title, status, or
     position as herein provided;

           (5) the Company shall require the Executive to have as his principal
     location of work any location which is in excess of 50 miles from the
     Executive's principal residence as of the date immediately prior to the
     Change in Control; or

           (6) any failure of any successor of or to the Company following a
     Change in Control to comply with Section IX(A).

           VII.  Compensation Upon Termination During Window Period

           (A) If the Executive's employment by the Company is terminated during
the Window Period:

                                       7
<PAGE>   8
           (1)  by the Company other than by reason of death, disability, or
     Cause, or

           (2)  by the Executive for Good Reason,

then the Company shall pay to the Executive, within the time specified in
Section VII(D), a lump sum in cash equal to the present value (determined as
provided in Section VII(B)) of his base salary and annual bonus at the rates
provided in Sections V(B)(1) and V(B)(2), respectively, for the remainder of the
Window Period.

           (B) In determining present value for purposes of Section VII(A),
there shall be applied a discount factor equal to the coupon rate on general
full-faith-and-credit obligations of the U.S. Treasury having a maturity of five
years and issued on the date of such termination (or, if no such obligations are
issued on that date, then on such obligations issued on the most recent day
prior to that date); provided, however, that if the Executive should die on or
after the date of such termination but before full payment is made to him
pursuant to Section VII(D), such payment shall be made to such person(s) as the
Executive shall have designated in a writing filed with the Secretary of the
Company or, if he shall not have filed such a designation, then to his executor
or administrator within ten days after appointment of the same.

           (C) To secure, fund, or otherwise assure to the maximum practicable
extent the payment to be made by the Company to the Executive pursuant to
Sections VII(A) and VII(B), the Company will enter into a trust agreement in
substantially the form attached hereto as Exhibit A. Should a Change in Control
occur during the Term while the Executive is an employee of the Company, the
Company shall, at or prior to the time of such Change in Control, cause there to
be on deposit with the trustee under such trust agreement an amount of funds
equal to one-twelfth of the sum of the amounts referred to in Section V(B)(1)
and Section V(B)(2) (disregarding the application of the discount factor
provided in Section VII(B)) multiplied by the lesser of 48 or the number of
months (rounded to the next higher number) between the date of such Change in
Control and the date the Executive reaches age 65. Should the Executive's

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<PAGE>   9
employment by the Company be terminated (i) for any reason prior to the
occurrence of a Change in Control or (ii) by reason by death, disability (on the
terms described in Section VI(B)), retirement, by the Company for Cause, or by
the Executive's decision to terminate it other than for Good Reason after the
occurrence of a Change in Control, the Executive will consent to the revocation
of the trust under the trust agreement and the payment to the Company of all the
assets then held in such trust.

           (D) The compensation provided for in Sections VII(A) and VII(B) shall
be paid not later than the 40th day following the date of any such termination
of employment pursuant to Section VII(A).

           (E) The Company shall arrange to provide the Executive, following the
date of any termination of employment of the type described in Section VII(A),
for the remainder of the Window Period, with continued coverage and
participation in the benefit plans, policies, arrangements, and perquisites
referred to in Sections V(B)(3) and V(B)(4) as if there had been no such
termination of employment (or with such improved coverage and participation, if
any, as may be implemented during the Window Period), except that participation
will not continue in any stock option, stock purchase, stock appreciation, or
stock grant plans and except that no benefits shall accrue for any period after
such termination of employment pursuant to any benefit plan qualified under
Section 401(a) of the Internal Revenue Code of 1986, as amended (the "Code"), or
any supplemental retirement benefit plan created for the benefit of the
Executive subsequent to the date of this Agreement (the "Supplemental Retirement
Benefit Plan") by reason of any provision included in this Agreement. For
purposes of applying the immediately preceding sentence with respect to any
benefit plan, policy, or arrangement the level of benefits under which depends
in whole or in part on years of service, the Executive shall be treated as
having continued in the employment of the Company for the remainder of the
Window Period. To the extent that the Executive's coverage or participation in
any such plan, policy, or arrangement is terminated by reason of the Executive's
no longer being an

                                       9
<PAGE>   10
employee of the Company during the Window Period, the Company shall (i) pay from
time to time to the Executive cash in amounts equal to what would have been
provided pursuant to such plan, policy, or arrangement at any such time had the
Executive's coverage or participation not been terminated and as if the
Executive's employment with the Company continued for the remainder of the
Window Period or (ii) arrange, with the Executive's prior written consent, to
provide him with coverage and participation in a substantially similar plan,
policy, or arrangement. If, under any plan, policy, or arrangement in effect
immediately prior to the Change in Control, the Executive would have been
eligible for post-retirement health or medical benefits with respect to himself
or others if his retirement had occurred on the last day of the Window Period,
the Company shall provide him with post-retirement health or medical benefits
that are substantially similar to those provided under such plan, policy, or
arrangement (or with such improved benefits, if any, as may be implemented
during the Window Period). In addition, the Company shall pay to the Executive,
within the time specified in Section VII(D), a lump sum (calculated as provided
in Section VII(B)) in cash equal to (i) the number of months (rounded to the
next higher number) between the date of termination of the Executive's
employment with the Company pursuant to Section VII(A) and the last day of the
Window Period multiplied by (ii) one-twelfth of the annual benefit (expressed as
a single life annuity commencing at age 65) that the Executive would have
accrued under the Brush Wellman Inc. Pension Plan for Salaried Employees (the
"Pension Plan") during the calendar year ending prior to the date of such
termination of employment if the Pension Plan did not contain the limitations on
benefits imposed by the Code, including, without limitation, Sections 415 and
401(a)(17) of the Code (the "Constructive Supplemental Amount"). The Company and
the Executive intend that the benefits payable under this Section VII(E) shall
not constitute a "supplemental retirement or other similar benefit" for purposes
of the Supplemental Retirement Benefit Plan. The obligation of the Company to
make any payments under this Section VII(E) constitutes the unsecured promise of
the Company to make such payments from its general

                                       10
<PAGE>   11
assets, and the Executive shall have no interest in, or lien or prior claim
upon, any property of the Company in connection therewith.

           (F) If the compensation and other payments under this Section VII,
either alone or together with other receipts of the Executive from the Company,
would, after taking into account Section VIII, constitute a "parachute payment"
(as defined in Section 280G of the Code), such compensation, other payments, and
other receipts shall be reduced to the largest amount as will result in no
portion of the such compensation, other payments, or other receipts being
subject to the excise tax imposed by Section 4999 of the Code. The determination
of any reduction under this Section VII(F) in such compensation, other payments,
and other receipts (including the section of the specific types of such
compensation, other payments, or other receipts to be reduced) shall be made by
the Executive in good faith (and upon the advice of a nationally recognized
expert in compensation matters engaged and paid for by the Executive) after
consultation with the Company. The Executive shall deliver such determination to
the Company by the 25th day following any termination of the Executive pursuant
to Section VII(A). His duty to consult with the Company under this Section
VII(F) shall expire on the 30th day following such termination. Such
determination shall be conclusive and binding on the Company. The Company shall
cooperate in good faith with the Executive in making such determination and in
providing the necessary information for this purpose.

           (G) The Company shall have no right of set-off or counterclaim in
respect of any of its obligations to the Executive under this Agreement.

                                       11
<PAGE>   12
                                VIII. Mitigation

           If the Executive's employment by the Company is terminated during the
Window Period pursuant to Section VII(A), the Company shall acknowledge by
written notice to the Executive that the Executive offered to continue
employment with the Company in accordance with the terms of this Agreement but
that such offer was rejected. Thereafter, the Executive shall, for a period of
two years (or, if less, for the remainder of the Window Period), use reasonable
efforts to mitigate damages by seeking other employment; provided, however, that
the Executive shall not be required to accept a position (i) of less importance
or of a substantially different character than the position he held immediately
prior to the date of such termination, (ii) that would call upon him to engage
in any Competitive Activity, or (iii) other than in a location within 50 miles
of his principal residence immediately prior to the date of such termination.
The Executive shall pay over to the Company 50% of all employment income earned
and received by him from other employers pursuant to the foregoing during such
two year (or lesser) period (up to the amount received by him from the Company
pursuant to Section VII(A)), and any employee benefits received from such other
employers during such period shall reduce pro tanto the Company's obligation to
furnish benefits or perquisites pursuant to Section VII(E).

                      IX. Successors and Binding Agreement

           (A) The Company shall require any successor (whether direct or
indirect, by purchase, merger, consolidation, or otherwise) to all or
substantially all of the business or assets of the Company by agreement in form
and substance satisfactory to the Executive to assume and agree to perform this
Agreement in the same manner and to the same extent the Company would be
required to perform if no such succession had taken place. If, at any time
during the Window Period following a Change in Control, there shall not be in
full force and effect an agreement between any such successor and the Executive
to the effect

                                       12
<PAGE>   13
contemplated by the preceding sentence, the absence of such agreement shall
constitute a material breach of this Agreement by such successor and shall
entitle the Executive to terminate his employment for Good Reason. This
Agreement shall be binding upon and inure to the benefit of the Company and any
successor of or to the Company, including, without limitation, any persons
acquiring directly or indirectly all or substantially all of the assets of the
Company whether by merger, consolidation, sale, or otherwise (and such successor
shall thereafter be deemed the "Company" for the purpose of this Agreement), but
shall not otherwise be assignable or delegable by the Company.

           (B) This Agreement shall inure to the benefit of and be enforceable
by the Executive's personal or legal representatives, executors, administrators,
assigns, heirs, distributees and legatees.

           (C) This Agreement is personal in nature and neither of the parties
hereto shall, without the consent of the other, assign, transfer, or delegate
this Agreement or any rights or obligations hereunder except as expressly
provided in Section IX(A). Without limiting the generality of the forgoing, the
Executive's right to receive payments hereunder shall not be assignable or
transferable, whether by pledge, creation of a security interest, or otherwise,
other than by a transfer by his will (or other testamentary instrument) or by
the laws of descent and distribution and, in the event of any attempted
assignment or transfer contrary to this Section IX(C), the Company shall have no
liability to pay any amount so attempted to be assigned or transferred.

                                       13
<PAGE>   14
                                   X. Notices

           All communications provided for herein or pursuant hereto shall be in
writing and shall be deemed to have been duly given when delivered:

     If to the Company to:

           Brush Wellman Inc.

           17876 St. Clair Avenue

           Cleveland, Ohio 44110

           Attention:  Secretary

     If to the Executive to:

or to such other address as either party may have furnished to the other in
writing in accordance herewith.

                              XI. Employment Rights

           Nothing expressed or implied in this Agreement shall create any right
or duty on the part of the Company or the Executive to have the Executive remain
in the employment of the Company prior to a Change in Control; provided,
however, that any termination of employment of the Executive following the
commencement of any discussions with a third party that ultimately result in a
Change in Control shall (unless such termination is wholly unrelated to such
discussions) be deemed to be a termination by the Executive for Good Reason
after a Change in Control.

                                       14
<PAGE>   15
                            XII. Withholding of Taxes

           The Company may withhold from any amounts payable under this
Agreement all federal, state, city, or other taxes as shall be required to be
withheld pursuant to any law or governmental regulation or ruling.

                           XIII. Competitive Activity

           Following the Executive's termination of employment pursuant to
Section VII(A) and for the duration of the Window Period, if the Company shall
have complied and be complying with this Agreement, the Executive shall not
engage in any Competitive Activity. The term "Competitive Activity" means the
Executive's participation, without the written consent of an officer of the
Company, in the management of any business enterprise if such enterprise engages
in substantial and direct competition with the Company. Competitive Activity
shall not include the mere ownership of securities in any enterprise and
exercise of rights appurtenant thereto.

                          XIV. Legal Fees and Expenses

           The Company shall pay and be solely responsible for any and all
attorneys' and related fees and expenses incurred by the Executive as a result
of (A) the Company's failure to perform this Agreement or any provision hereof;
(B) the Company, any shareholder of the Company, or any other person contesting
the validity or enforceability of this Agreement or any provision hereof; or (C)
the Company, any shareholder of the Company, or any other person contesting the
performance by the Executive of his obligations under this Agreement.
Performance of the Company's obligations under this Section XIV shall be secured
by one or more policies of insurance or as the Board may otherwise determine.

                                XV. Supersession

                                       15
<PAGE>   16
           If the Executive has heretofore entered into an Employment Agreement
dated July 1, 1983 with the Company, this Agreement shall supersede such
Employment Agreement, which Employment Agreement is hereby cancelled with
neither party thereunder having any liability to the other.

                               XVI. Governing Law

           The validity, interpretation, construction, and performance of this
Agreement shall be governed by the internal substantive laws of the State of
Ohio, disregarding principle of conflicts of law and the like.

                               XVII. Miscellaneous

           No provision of this Agreement may be modified, waived, or discharged
unless such modification, waiver or, discharge is agreed to in a writing signed
by the Executive and the Company. No waiver by either party hereto at any time
of any breach by the other party hereto or compliance with any condition or
provision of this Agreement to be performed by such other party shall be deemed
a waiver of similar or dissimilar provisions or conditions at the same or at any
prior or subsequent time. No agreements or representations, oral or otherwise,
express or implied, with respect to the subject matter hereof have been made by
either party which are not set forth expressly in this Agreement, except as set
forth in the letter dated April 4, 1997 from Gordon D. Harnett to the Executive
with respect to the terms of his initial employment by the Company; provided,
however, that there shall be no duplication of payments made under Article VII
of this Agreement with the severance payment provided for in such letter.

                                 XVIII. Validity

           The invalidity or unenforceability of any provision of this Agreement
shall not affect the validity or enforceability of any other provision of this
Agreement.

                                       16
<PAGE>   17
                                XIX. Counterparts

           This Agreement may be executed in one or more counterparts, each of
which shall be deemed to be an original but all of which together will
constitute one and the same instrument.

           IN WITNESS WHEREOF, the parties have caused this Agreement to be duly
executed and delivered on the date set forth above.

                                   BRUSH WELLMAN INC.

                                   By: ______________________________

                                   Title: Gordon D. Harnett
                                          President and CEO

                                  THE EXECUTIVE

                                   _____________________________________

                                       17

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