Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We have issued our report dated June 6, 2005, accompanying the financial statements included in the Annual Report of the Hawk Corporation 401(k) Retirement Plan (formerly the Friction Products Co. Profit Sharing Plan) on Form 11-K for the year ended December 31, 2004. We hereby consent to the incorporation by reference of said report in the Post-Effective Amendment No. 2 to the Registration Statement of Hawk Corporation Form S-8 (File No. 333-68583, effective June 23, 2004).

/s/ Grant Thornton LLP

Cleveland, Ohio

June 6, 2005