EXHIBIT 23.1
Consent of Independent Auditors
We consent to the incorporation by reference in the following Registration
Statements of our report dated June 19, 2000, with respect to the financial
statements of Outokumpu Nickel Oy for the year ended December 31, 1999
included in the Current Report on Form 8-K/A:
Registration
Number Description Filing Date
------------ ----------------------------------------------- ----------------
33-74674 OM Group, Inc. Long-Term Incentive Compensation
Plan -- Form S-8 Registration Statement--
1,015,625 January 27, 1994
333-7529 OMG Americas, Inc. Employees' Profit Sharing
Plan - Form S-8 Registration Statement -
250,000 shares July 3, 1996
333-7531 OM Group, Inc. Non-Employee Directors' Equity
Plan - Form S-8 Registration Statement -
250,000 Shares July 3, 1996
June 19, 2000 Tilintarkastajien Oy Ernst & Young
Helsinki, Finland Authorized Accounting Firm
/s/ Carl Gustaf af Hallstrom
----------------------------
Carl Gustaf af Hallstrom
Authorized Public Accountant
