Document:

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                                                                    Exhibit 4(b)

                    AMENDED AND RESTATED CODE OF REGULATIONS
                                       OF
                         BRUSH ENGINEERED MATERIALS INC.

                              Shareholder Meetings

       1. Time And Place Of Meetings. All meetings of the shareholders for the
election of directors or for any other purpose will be held at such time and
place, within or without the State of Ohio, as may be designated by the Board of
Directors or, in the absence of a designation by the Board of Directors, the
Chairman of the Board of Directors, if any (the "Chairman"), the President, the
Secretary or any other individual entitled to give notice pursuant to Regulation
4. The time of the meeting shall be stated in the notice of meeting. The Board
of Director may postpone and reschedule any previously scheduled annual or
special meeting of the shareholders.

       2. Annual Meeting. An annual meeting of the shareholders will be held at
such time and place as may be designated pursuant to Regulation 1, at which
meeting the shareholders will elect directors to succeed those directors whose
terms expire at such meeting and will transact such other business as may be
brought properly before the meeting in accordance with Regulation 9. If the
annual meeting is not held or if the number of directors elected thereat is not
sufficient to replace the directors whose terms expire at that meeting and to
fill all other vacancies, directors may be elected at a special meeting called
for the purpose of electing directors.

       3. Special Meetings. (a) Special meetings of shareholders may be called
by the Chairman, by the President, by a Vice President, by a majority of the
Board of Directors acting with or without a meeting or by any person or persons
who hold not less than 50% of all the shares outstanding and entitled to be
voted on any proposal to be submitted at the meeting to be called. Special
meetings of the holders of shares that are entitled to call a special meeting by
virtue of any Preferred Stock Designation may call such meetings in the manner
and for the purposes provided in the applicable terms of such Preferred Stock
Designation. For purposes of this Amended and Restated Code of Regulations,
"Preferred Stock Designation" means the express terms of shares of any class or
series of capital stock of the Corporation, whether now or hereafter issued,
with rights to distributions senior to those of the Common Stock including,
without limitation, any relative, participating, optional or other special
rights and privileges of, and any qualifications or restrictions on, such
shares.

       (b) Upon written request by any person or persons entitled to call a
meeting of shareholders delivered in person or by registered mail to the
President or the Secretary, such officer shall forthwith cause notice of the
meeting to be given to the shareholders entitled to notice of such meeting in
accordance with Regulation 4. If such notice shall not be given within 60 days
after the delivery or mailing of such request, the person or persons requesting
the meeting may fix the time of the meeting and give, or cause to be given,
notice in the manner provided in Regulation 4.

       4. Notice Of Meetings. Written notice of every meeting of the
shareholders called in accordance with these Regulations (including any
postponed and rescheduled meeting), stating the time, place and purposes for
which the meeting is called, will be given by or at the direction of the
President, a Vice President, the Secretary or an Assistant Secretary (or in
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case of their refusal to give notice by the person or persons entitled to call
the meeting under Regulation 3). Such notice will be given by personal delivery,
by mail or by electronic medium not fewer than 7 nor more than 60 calendar days
before the date of the meeting to each shareholder of record entitled to notice
of such meeting. If such notice is mailed, it shall be addressed to the
shareholders at their respective addresses as they appear on the records of the
Corporation, and notice shall be deemed to have been given on the day so mailed.
Notice of adjournment of a meeting need not be given if the time and place to
which it is adjourned are fixed and announced at such meeting.

       5. Inspectors. Inspectors of election may be appointed to act at any
meeting of shareholders in accordance with Ohio law.

       6. Shareholder Lists. At any meeting of shareholders, an alphabetically
arranged list, or classified lists, of the shareholders of record as of the
applicable record date who are entitled to vote, showing their respective
addresses and the number and classes of shares held by each, shall be produced
on the request of any shareholder.

       7. Quorum. To constitute a quorum at any meeting of shareholders, there
shall be present, in person or by proxy, shareholders of record entitled to
exercise not less than a majority of the voting power of the Corporation in
respect of any one of the purposes for which the meeting is called, unless a
greater or lesser number is expressly provided for with respect to a particular
class or series of capital stock by the terms of any applicable Preferred Stock
Designation. Except as may be otherwise provided in any Preferred Stock
Designation, the holders of a majority of the voting power of the Corporation
represented in person or by proxy at a meeting of shareholders, whether or not a
quorum be present, may adjourn the meeting from time to time. For purposes of
this Amended and Restated Code of Regulations, "voting power of the Corporation"
means the aggregate voting power of (a) all the outstanding shares of Common
Stock of the Corporation and (b) all the outstanding shares of any class or
series of capital stock of the Corporation that has (i) rights to distributions
senior to those of the Common Stock including, without limitation, any relative,
participating, optional or other special rights and privileges of, and any
qualifications or restrictions on, such shares and (ii) voting rights entitling
such shares to vote generally in the election of directors.

       8. Voting. Except as otherwise expressly required by law, the Amended and
Restated Articles of Incorporation or this Amended and Restated Code of
Regulations, at any meeting of shareholders at which a quorum is present, a
majority of the votes cast, whether in person or by proxy, on any matter
properly brought before such meeting in accordance with Regulation 9 will be the
act of the shareholders. An abstention shall not represent a vote cast. A
shareholder may revoke any proxy that is not irrevocable by attending the
meeting and voting in person or by filing with the Secretary written notice of
revocation or a later appointment. The vote upon any question brought before a
meeting of the shareholders may be by voice vote, unless otherwise required by
law, the Amended and Restated Articles of Incorporation or this Amended and
Restated Code of Regulations or unless the presiding officer otherwise
determines. Every vote taken by written ballot will be counted by the inspectors
of election, if inspectors of election are appointed.

       9. Order Of Business. (a) The Chairman, or such other officer of the
Corporation as is designated by a majority of the total number of directors that
the Corporation would have if there were no vacancies on the Board of Directors
(such number being referred to as the "Whole Board"), will call
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meetings of shareholders to order and will act as presiding officer thereof.
Unless otherwise determined by the Board of Directors prior to the meeting, the
presiding officer of the meeting of shareholders will also determine the order
of business and have the authority in his or her sole discretion to regulate the
conduct of any such meeting, including, without limitation, (i) by imposing
restrictions on the persons (other than shareholders of the Corporation or their
duly appointed proxies) who may attend any such shareholders' meeting, (ii) by
ascertaining whether any shareholder or his proxy may be excluded from any
meeting of shareholders based upon the presiding officer's determination that
any such person has unduly disrupted or is likely to disrupt the proceedings of
the meeting and (iii) by determining the circumstances in which and time at
which any person may make a statement or ask questions at any meeting of
shareholders.

       (b) At an annual meeting of the shareholders, only such business will be
conducted or considered as is properly brought before the meeting. To be
properly brought before an annual meeting, business must be (i) specified in the
notice of meeting (or any supplement thereto) given by or at the direction of
the President, a Vice President, the Secretary or an Assistant Secretary in
accordance with Regulation 4, (ii) otherwise properly brought before the meeting
by the presiding officer or by or at the direction of a majority of the Whole
Board or (iii) otherwise properly requested to be brought before the meeting by
a shareholder of the Corporation in accordance with Regulation 9(c).

       (c) For business to be properly requested by a shareholder to be brought
before an annual meeting, the shareholder must (i) be a shareholder of the
Corporation of record at the time of the giving of the notice for such annual
meeting as provided for in this Amended and Restated Code of Regulations,
(ii) be entitled to vote at such meeting and (iii) have given timely written
notice of the request to the Secretary. To be timely, a shareholder's notice
must be delivered to or mailed and received at the principal executive offices
of the Corporation not fewer than 60 nor more than 90 calendar days prior to the
annual meeting; provided, however, that in the event public announcement of the
date of the annual meeting is not made at least 75 calendar days prior to the
date of the annual meeting and the annual meeting is held on a date more than
ten calendar days before or after the first anniversary of the date on which the
prior year's annual meeting was held, notice by the shareholder, to be timely,
must be so received not later than the close of business on the 10th calendar
day following the day on which public announcement is first made of the date of
the annual meeting. A shareholder's notice to the Secretary must set forth as to
each matter the shareholder proposes to bring before the annual meeting (A) a
description in reasonable detail of the business desired to be brought before
the annual meeting and the reasons for conducting such business at the annual
meeting, (B) the name and address, as they appear on the Corporation's books, of
the shareholder proposing such business and of the beneficial owner, if other
than the shareholder, on whose behalf the proposal is made, (C) the class and
number of shares of the Corporation that are owned beneficially and of record by
the shareholder proposing such business and by the beneficial owner, if other
than the shareholder, on whose behalf the proposal is made and (D) any material
interest of the shareholder proposing such business and the beneficial owner, if
other than the shareholder, on whose behalf the proposal is made in such
business. Notwithstanding the foregoing provisions of this Amended and Restated
Code of Regulations, a shareholder must also comply with all applicable
requirements of the Securities Exchange Act of 1934, as amended, and the rules
and regulations thereunder with respect to the matters set forth in this
Regulation 9(c). For purposes of this Regulation 9(c) and Regulation 14, "public
announcement"
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means disclosure in a press release reported by the Dow Jones News Service,
Associated Press, or comparable national news service or in a document publicly
filed by the Corporation with the Securities and Exchange Commission pursuant to
Sections 13, 14 or 15(d) of the Securities Exchange Act of 1934, as amended, or
publicly filed by the Corporation with any national securities exchange or
quotation service through which the Corporation's stock is listed or traded, or
furnished by the Corporation to its shareholders. Nothing in this Regulation
9(c) will be deemed to affect any rights of shareholders to request inclusion of
proposals in the Corporation's proxy statement pursuant to Rule 14a-8 under the
Securities Exchange Act of 1934, as amended.

       (d) At a special meeting of shareholders, only such business may be
conducted or considered as is properly brought before the meeting. To be
properly brought before a special meeting, business must be (i) specified in the
notice of the meeting (or any supplement thereto) given by or at the direction
of the President, a Vice President, the Secretary or an Assistant Secretary (or
in case of their failure to give any required notice, the other persons entitled
to give notice) in accordance with Regulation 4 or (ii) otherwise brought before
the meeting by the presiding officer or by or at the direction of a majority of
the Whole Board.

       (e) The determination of whether any business sought to be brought before
any annual or special meeting of the shareholders is properly brought before
such meeting in accordance with this Regulation 9 will be made by the presiding
officer of such meeting. If the presiding officer determines that any business
is not properly brought before such meeting, he or she will so declare to the
meeting and any such business will not be conducted or considered.

       10. Report To Shareholders. At the annual meeting, or at the meeting held
in lieu thereof, the officers of the Corporation shall lay before the
shareholders a financial statement as required by statute.

       11. Action Without A Meeting. Any action that may be authorized or taken
at a meeting of the shareholders may be authorized or taken without a meeting in
a writing or writings signed by all of the shareholders who would be entitled to
notice of a meeting for such purpose, which writing or writings shall be filed
with or entered upon the records of the Corporation.
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                                    DIRECTORS

       12. Function. Except where the law, the Amended and Restated Articles of
Incorporation or this Amended and Restated Code of Regulations requires action
to be authorized or taken by the shareholders, all of the authority of the
Corporation shall be exercised by or under the direction of the Board of
Directors.

       13. Number, Terms And Election Of Directors. (a) The directors of the
corporation, other than those who may be expressly elected by virtue of the
terms of any Preferred Stock Designation, shall be classified with respect to
the time for which they severally hold office into three classes. Except as may
be otherwise provided in any Preferred Stock Designation, each class will
consist of not less than three directors, unless and until the number of
directors of any such class is changed in accordance with this Regulation 13.
The number of directors of any class will be determined from time to time by
(i) the affirmative vote of the holders of a majority of the voting power of the
Corporation, voting together as a single class, or (ii) a vote of a majority of
the Whole Board, provided that the number of directors of any class changed by a
vote of a majority of the Whole Board shall not differ by more than one from the
number of directors of such class as last fixed by the shareholders.

       (b) The directors first appointed to Class I will hold office for a term
expiring at the annual meeting of shareholders to be held in 2001; the directors
first appointed to Class II will hold office for a term expiring at the annual
meeting of shareholders to be held in 2002; and the directors first appointed to
Class III will hold office for a term expiring at the annual meeting of
shareholders to be held in 2003. The members of each class will hold office
until their successors are elected. At each annual meeting beginning in 2001,
directors will be elected for a term of three years from the date of their
election and until the election of their successors.

       (c) At each annual meeting of the shareholders of the Corporation, the
successors to the directors whose terms expire at that meeting shall be elected
by a plurality of all the votes cast at such meeting. Cumulative voting in the
election of directors shall be permitted as provided by statute. Election of
directors of the Corporation need not be by written ballot unless requested by
the presiding officer or by the holders of a majority of the voting power of the
Corporation present in person or represented by proxy at a meeting of the
shareholders at which directors are to be elected. Directors may also be elected
by a majority of the votes cast at a special meeting called for the purpose of
electing directors or as may otherwise be provided by any Preferred Stock
Designation.

       14. Newly Created Directorships And Vacancies. Except as may be otherwise
provided in any Preferred Stock Designation, any vacancy (including newly
created directorships resulting from any increase in the number of directors and
any vacancies on the Board of Directors resulting from death, resignation,
disqualification, removal, or other cause) may be filled by (i) the affirmative
vote of a majority of the remaining directors then in office, even though less
than a quorum of the Board of Directors, (ii) sole remaining director or (iii)
the affirmative vote of the holders of a majority of the Voting Power of the
Corporation, voting together as a single class, after a vote to increase the
number of directors at a meeting called for that purpose in accordance with this
Amended and Restated Code of Regulations. Any director elected in accordance
with this Regulation 14, any Preferred Stock Designation or applicable statute
will hold office for the remainder of the
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full term of the class of directors in which the new directorship was created or
the vacancy occurred and until such director's successor has been elected.

       15. Removal. Except as may otherwise be provided by any Preferred Stock
Designation, all Directors, for whatever terms elected, shall hold office
subject to applicable statutory provisions as to the creation of vacancies and
removal. No decrease in the number of directors constituting the Board of
Directors may shorten the term of any incumbent director.

       16. Nominations Of Directors; Election. (a) Except as may be otherwise
provided in any Preferred Stock Designation, only persons who are nominated in
accordance with this Regulation 16 will be eligible for election at a meeting of
shareholders to be members of the Board of Directors of the Corporation.

       (b) Nominations of persons for election as directors of the Corporation
may be made only at a meeting of shareholders (i) by or at the direction of the
Board of Directors or a committee thereof or (ii) by any shareholder who is a
shareholder of record at the time of giving of notice provided for in this
Regulation 16, who is entitled to vote for the election of directors at such
meeting, and who complies with the procedures set forth in this Regulation 16.
All nominations by shareholders must be made to the Secretary in proper written
form and must be timely.

       (c) To be timely, a shareholder's notice must be delivered to or mailed
and received at the principal executive offices of the Corporation, in the case
of a special meeting of the shareholders, at the time the meeting request is
made in accordance with Regulation 3, or, in the case of an annual meeting, not
fewer than 60 nor more than 90 calendar days prior to such annual meeting;
provided, however, that in the event that public announcement of the date of the
annual meeting is not made at least 75 calendar days prior to the date of the
annual meeting and the annual meeting is held on a date more than one week
before or after the first anniversary of the date on which the prior year's
annual meeting was held, notice by the shareholder to be timely must be so
received not later than the close of business on the 10th calendar day following
the day on which public announcement is first made of the date of the annual
meeting.

       (d) To be in proper written form, such shareholder's notice must set
forth or include:

             (i) the name and address, as they appear on the Corporation's
       books, of the shareholder giving the notice and of the beneficial owner,
       if any, on whose behalf the nomination is made;

             (ii) a representation that the shareholder giving the notice is a
       holder of record of stock of the Corporation entitled to vote at such
       annual meeting and intends to appear in person or by proxy at the annual
       meeting to nominate the person or persons specified in the notice;

             (iii) the class and number of shares of stock of the Corporation
       owned beneficially and of record by the shareholder giving the notice and
       by the beneficial owner, if any, on whose behalf the nomination is made;

             (iv) a description of all arrangements or understandings between or
       among any of (A) the shareholder giving the notice, (B) the beneficial
       owner on whose behalf the notice is given, (C) each nominee and (D) any
       other person or persons (naming such person or persons)
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       pursuant to which the nomination or nominations are to be made by the
       shareholder giving the notice;

             (v) such other information regarding each nominee proposed by the
       shareholder giving the notice as would be required to be included in a
       proxy statement filed pursuant to the proxy rules of the Securities and
       Exchange Commission had the nominee been nominated, or intended to be
       nominated, by the Board of Directors; and

             (vi) the signed consent of each nominee to serve as a director of
       the Corporation if so elected.

       (e) The presiding officer of any annual meeting may, if the facts
warrant, determine that a nomination was not made in accordance with this
Regulation 16, and if he or she should so determine, he or she will so declare
to the meeting, and the defective nomination will be disregarded.
Notwithstanding the foregoing provisions of this Regulation 16, a shareholder
must also comply with all applicable requirements of the Securities Exchange Act
of 1934, as amended, and the rules and regulations thereunder with respect to
the matters set forth in this Regulation 16.

       17. Resignation. Any director may resign at any time by giving written
notice of his resignation to the Chairman or the Secretary. Any resignation will
be effective upon actual receipt by any such person or, if later, as of the date
and time specified in such written notice.

       18. Regular Meetings. Regular meetings of the Board of Directors shall be
held immediately after the annual meeting of the shareholders and at such other
time and place either within or without the State of Ohio as may from time to
time be determined by a majority of the Whole Board. Notice of regular meetings
of the Board of Directors need not be given.

       19. Special Meetings. Special meetings of the Board of Directors may be
called by the Chairman, by the President, by a Vice President, by the Secretary
or by any two directors. Notice of special meetings, stating the place, date and
hour, shall be given to each director by whom such notice is not waived. Notice
must be given either personally or by mail, telephone, telegram, telex,
facsimile or similar medium of communication not less than twenty- four hours
before the designated hour for such meeting. Special meetings of the Board of
Directors may be held at such time and place either within or without the State
of Ohio as is determined by a majority of the Whole Board or specified in the
notice of any such meeting.

       20. Quorum And Vote. At all meetings of the Board of Directors, a
majority of the total number of directors then in office will constitute a
quorum for the transaction of business. Except as may be otherwise provided in
any Preferred Stock Designation or by this Amended and Restated Code of
Regulations, the act of a majority of the directors present at any meeting at
which a quorum is present will be the act of the Board of Directors. If a quorum
is not present at any meeting of the Board of Directors, the directors present
thereat may adjourn the meeting from time to time to another time or place,
without notice other than announcement at the meeting, until a quorum is
present.

       21. Action Without A Meeting. Any action that may be authorized or taken
at a meeting of the Board of Directors may be authorized or taken without a
meeting in a writing or writings signed by all the directors, which writing or
writings shall be filed with or entered upon the records of the Corporation.
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       22. Participation In Meetings By Communications Equipment. Meetings of
the Board of Directors or of any committee of the Board of Directors may be held
through any means of communications equipment if all persons participating can
hear each other, and such participation will constitute presence in person at
such meeting.

       23. Committees. The Board of Directors may from time to time create an
executive committee or any other committee or committees of directors to act in
the intervals between meetings of the Board of Directors and may delegate to
such committee or committees any of its authority other than that of filling
vacancies among the Board of Directors or in any committee of the Board of
Directors. Each committee shall consist of one or more directors. The Board of
Directors may appoint one or more directors as alternate members of any such
committee to take the place of absent committee members at meetings of such
committee. Unless otherwise ordered by the Board of Directors, a majority of the
members of any committee appointed by the Board of Directors pursuant to this
Regulation 23 shall constitute a quorum at any meeting thereof, and the act of a
majority of the members present at a meeting at which a quorum is present shall
be the act of such committee. Action may be taken by any such committee without
a meeting by a writing or writings signed by all of its members. Any such
committee shall prescribe its own rules for calling and holding meetings and its
method of procedure, subject to any rules prescribed by the Board of Directors,
and will keep a written record of all action taken by it.

       24. Compensation. The Board of Directors may establish the compensation
and expense reimbursement policies for directors in exchange for service on the
Board of Directors and on committees of the Board of Directors, for attendance
at meetings of the Board of Directors or committees of the Board of Directors,
and for other services by directors to the Corporation or any of its
subsidiaries.

       25. Bylaws. The Board of Directors may adopt Bylaws for the conduct of
its meetings and those of any committees of the Board of Directors that are not
inconsistent with the Amended and Restated Articles of Incorporation or this
Amended and Restated Code of Regulations.

                                    OFFICERS

       26. Generally. The Corporation may have a Chairman, elected by the
directors from among their number, and shall have a President, who shall also be
a director, a Secretary and a Treasurer. The Corporation may also have one or
more Vice Presidents and such other officers and assistant officers as the Board
of Directors may deem appropriate. If the Board of Directors so desires, it may
elect a Chief Executive Officer to manage the affairs of the Corporation,
subject to the direction and control of the Board of Directors. All of the
officers shall be elected by the Board of Directors. Notwithstanding the
foregoing, by specific action, the Board of Directors may authorize the Chairman
or the President to appoint any person to any office other than Chairman,
President, Secretary or Treasurer. Any number of offices may be held by the same
person, and no two offices must be held by the same person. Any of the offices,
other than the office of President, Secretary and Treasurer, may be left vacant
from time to time as the Board of Directors may determine. In case of the
absence or disability of any officer of the Corporation or for any other reason
deemed sufficient by a majority of the Board of Directors, the Board of
Directors may delegate the absent or disabled officer's powers or duties to any
other officer or to any director.
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       27. Authority And Duties Of Officers. The officers of the Corporation
shall have such authority and shall perform such duties as are customarily
incident to their respective offices, or as may be specified from time to time
by the Board of Directors, regardless of whether such authority and duties are
customarily incident to such office.

       28. Compensation. The compensation of all officers and agents of the
Corporation who are also members of the Board of Directors of the Corporation
will be fixed by the Board of Directors or by a committee of the Board of
Directors. The Board of Directors may fix the compensation of the other officers
and agents of the Corporation, or delegate the power to fix such compensation,
to the Chief Executive Officer or any other officer of the Corporation.

       29. Succession. The officers of the Corporation will hold office until
their successors are elected pursuant to Regulation 26. Any officer may be
removed at any time by the affirmative vote of a majority of the Whole Board.
Any vacancy occurring in any office of the Corporation may be filled by the
Board of Directors or by the Chairman or President as provided in Regulation 26.

                                      STOCK

       30. Transfer And Registration Of Certificates. The Board of Directors
shall have authority to make such rules and regulations as it deems expedient
concerning the issuance, transfer and registration of certificates for shares
and the shares represented thereby and may appoint transfer agents and
registrars thereof.

       31. Substituted Certificates. Any person claiming a certificate for
shares to have been lost, stolen or destroyed (i) shall make an affidavit or
affirmation of that fact, (ii) shall give the Corporation and its registrar or
registrars and its transfer agent or agents a bond of indemnity satisfactory to
the Board of Directors or a committee thereof or to the President or a Vice
President and the Secretary or the Treasurer and (iii) shall, if required by the
Board of Directors or a committee thereof or the officers named in this
Regulation 31, advertise the fact that the certificate has been lost, stolen or
destroyed, whereupon a new certificate may be executed and delivered of the same
tenor and for the same number of shares as the one alleged to have been lost,
stolen or destroyed.

       32. Voting Of Shares Held By The Corporation. Unless otherwise ordered by
the Board of Directors, the President, in person or by proxy or proxies
appointed by him, shall have full power and authority on behalf of the
Corporation to vote, act and consent with respect to any shares issued by other
corporations and owned by the Corporation.

       33. Record Dates And Owners. (a) In order that the Corporation may
determine the shareholders entitled to notice of or to vote at any meeting of
shareholders or any adjournment thereof, or to designate an agent to act on
behalf of the shareholders to call a special meeting of shareholders, or to take
any other collective action on behalf of the shareholders, the Board of
Directors may fix a record date, which will not be fewer than 7 nor more than 60
calendar days before the date of such meeting. If no record date is fixed by the
Board of Directors, the record date for determining shareholders entitled to
notice of or to vote at a meeting of shareholders will be the date next
preceding the day on which notice is given, or, if notice is waived, the date
next preceding the day on which the meeting is held.
<PAGE>   10

       (b) The Corporation will be entitled to treat the person in whose name
shares are registered on the books of the Corporation as the absolute owner
thereof, and will not be bound to recognize any equitable or other claim to, or
interest in, such share on the part of any other person, whether or not the
Corporation has knowledge or notice of the claim or interest, except as
expressly provided by applicable law.
<PAGE>   11

                          INDEMNIFICATION AND INSURANCE

       34. Indemnification.

       (a) The Corporation shall indemnify, to the full extent then permitted by
law, any director or officer or former director or officer of the Corporation
who was or is a party or is threatened to be made a party to any threatened,
pending or completed action, suit or proceeding, whether civil, criminal,
administrative or investigative, by reason of the fact that he is or was a
member of the Board of Directors or an officer, employee or agent of the
Corporation, or is or was serving at the request of the Corporation as a
director, trustee, officer, employee or agent of another corporation,
partnership, joint venture, trust or other enterprise. The Corporation shall
pay, to the full extent then required by law, expenses, including attorney's
fees, incurred by a member of the Board of Directors in defending any such
action, suit or proceeding as they are incurred, in advance of the final
disposition thereof.

       (b) To the full extent then permitted by law, the Corporation may
indemnify employees, agents and other persons and may pay expenses, including
attorney's fees, incurred by any employee, agent or other person in defending
any action, suit or proceeding as such expenses are incurred, in advance of the
final disposition thereof.

       (c) The indemnification and payment of expenses provided by this
Regulation 34 shall not be exclusive of, and shall be in addition to, any other
rights granted to any person seeking indemnification under any law, the Amended
and Restated Articles of Incorporation, any agreement, vote of shareholders or
disinterested members of the Board of Directors, or otherwise, both as to action
in official capacities and as to action in another capacity while he or she is a
member of the Board of Directors or an officer, employee or agent of the
Corporation, and shall continue as to a person who has ceased to be a member of
the Board of Directors, trustee, officer, employee or agent and shall inure to
the benefit of the heirs, executors, and administrators of such a person.

       35. Insurance. The Corporation may, to the full extent then permitted by
law and authorized by the Board of Directors, purchase and maintain insurance or
furnish similar protection, including but not limited to trust funds, letters of
credit or self-insurance, on behalf of or for any persons described in
Regulation 34 against any liability asserted against and incurred by any such
person in any such capacity, or arising out of his status as such, whether or
not the Corporation would have the power to indemnify such person against such
liability. Insurance may be purchased from or maintained with a person in which
the Corporation has a financial interest.

       36. Agreements. The Corporation, upon approval by the Board of Directors,
may enter into agreements with any persons who the Corporation may indemnify
under this Amended and Restated Code of Regulations or under law and may
undertake thereby to indemnify such persons and to pay the expenses incurred by
them in defending any action, suit or proceeding against them, whether or not
the Corporation would have the power under law or this Amended and Restated Code
of Regulations to indemnify any such person.

                                     GENERAL

       37. Fiscal Year. The fiscal year of the Corporation will end on the
thirty-first day of December in each calendar year or such other date as may be
fixed from time to time by the Board of Directors.
<PAGE>   12

       38. Seal. The seal of the Corporation shall be circular in form with the
name of the Corporation stamped around the margin and the word "Seal" stamped
across the center.

       39. Amendments. Except as otherwise provided by law or by the Amended and
Restated Articles of Incorporation or this Amended and Restated Code of
Regulations, these Regulations or any of them may be amended in any respect or
repealed at any time by the affirmative vote of the holders of a majority of the
voting power of the Corporation, voting together as a single class.<PAGE>   1

                                                                    Exhibit 4(c)

                               BRUSH WELLMAN INC.
                             17876 ST. CLAIR AVENUE
                              CLEVELAND, OHIO 44110

                                  May 16, 2000

National City Bank, N.A.
Corporate Trust Administration
629 Euclid Avenue, Suite 635
Cleveland, Ohio  44114

       Attention: Vice President - Administration

                     Re: Amendment No. 1 to Rights Agreement
                         -----------------------------------

Ladies and Gentlemen:

            Pursuant to Section 27 of the Rights Agreement (the "Rights
Agreement"), dated as of January 27, 1998, between Brush Wellman Inc. (the
"Company"), and National City Bank, N.A., as rights agent, the Company, by
resolution adopted by its Directors, hereby amends the Rights Agreement as
follows:

            i.         Section 1(l) of the Rights Agreement is hereby amended
                  and restated in its entirety as follows:

            "(l) "Expiration Date" means the earliest of (i) the Close of
            Business on the Final Expiration Date, (ii) the time at which the
            Rights are redeemed as provided in Section 23, (iii) the time at
            which all exercisable Rights are exchanged as provided in Section
            24, and (iv) immediately prior to the Effective Time (as defined in
            the Merger Agreement)."

            ii.        Section 1(p) of the Rights Agreement is hereby amended by
                  adding the following new Section 1(pp) immediately thereafter:

            (pp) "MERGER AGREEMENT" means the Agreement Of Merger, dated as of
            May 16, 2000, among Brush Merger Co., an Ohio corporation ("Merger
            Co."), the Company, and Brush Engineered Materials Inc., an Ohio
            corporation ("Holding Company").

            iii.       Section 1 of the Rights Agreement is hereby amended by
                  adding the following new paragraph at the end of that Section:

                  Notwithstanding anything in this Agreement to the contrary,
            none of Merger Co., Holding Company, any of their Affiliates or
<PAGE>   2

            Associates or any of their permitted assignees or transferees shall
            be deemed an Acquiring Person and none of a Distribution Date, a
            Share Acquisition Date, or a Triggering Event shall be deemed to
            occur or to have occurred, and that the Rights will not become
            separable, distributable, unredeemable or exercisable, in each such
            case, by reason or as a result of the approval, execution or
            delivery of the Merger Agreement, the consummation of the Merger (as
            defined in the Merger Agreement) or the consummation of the other
            transactions contemplated by the Merger Agreement.

            iv.        The Rights Agreement shall not otherwise be supplemented
                  or amended by virtue of this Amendment No. 1 to the Rights
                  Agreement, but shall remain in full force and effect.

            v.         Capitalized terms used without other definition in this
                  Amendment No. 1 to the Rights Agreement shall be used as
                  defined in the Rights Agreement.

            vi.        This Amendment No. 1 to the Rights Agreement shall be
                  deemed to be a contract made under the internal substantive
                  laws of the State of Ohio and for all purposes will be
                  governed by and construed in accordance with the internal
                  substantive laws of such State applicable to contracts to be
                  made and performed entirely within such State.

            vii.       This Amendment No. 1 to the Rights Agreement may be
                  executed in any number of counterparts and each of such
                  counterparts shall for all purposes be deemed to be an
                  original, and all such counterparts shall together constitute
                  but one and the same instrument.

            viii.      This Amendment No. 1 to the Rights Agreement shall be
                  effective as of, and immediately prior to, the execution and
                  delivery of the Merger Agreement, and all references to the
                  Rights Agreement shall, from and after such time, be deemed to
                  be references to the Rights Agreement as amended hereby.
<PAGE>   3

            ix.        Exhibits B and C to the Rights Agreement shall be deemed
                  amended in a manner consistent with this Amendment No. 1 to
                  the Rights Agreement.

                                        Very truly yours,

                                        Brush Wellman Inc.

                                        By: /s/ Michael C. Hasychak
                                            ------------------------------------
                                            Name: Michael C. Hasychak
                                            Title: Secretary

Accepted and agreed to as of the effective time specified above:

National City Bank, N.A.

By: /s/ Laura S. Kress
    ------------------------------------
    Name: Laura S. Kress
    Title: Vice President

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