Aleris 10-Q 2016 Q3 Quarterly report

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

AND CHIEF FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Aleris Corporation (the “Company”) on Form 10-Q for the period ended September 30, 2016 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Sean M. Stack, President and Chief Executive Officer of the Company, and Eric M. Rychel, Executive Vice President, Chief Financial Officer and Treasurer of the Company, each hereby certifies, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to his knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	November 14, 2016	/s/ Sean M. Stack
		Sean M. Stack
		President and Chief Executive Officer (Principal Executive Officer)
Date:	November 14, 2016	/s/ Eric M. Rychel
		Eric M. Rychel
		Executive Vice President, Chief Financial Officer and Treasurer (Principal Financial Officer)