AK Steel, Middletown, Ohio, completed its purchase of Alpha Tube Corp., Walbridge, Ohio. Following the acquisition, the company has been named AK Tube LLC. AK Steel purchased the assets of the tube company through an auction conducted in federal bankruptcy court in Wilmington, Del. Acme Metals Inc., Riverdale, Ill., owned the company and filed for Chapter 11 bankruptcy protection in September 1998. Alpha Tube has continued to manufacture and market its products since the filing. AK Tube LLC employs about 250 in its facility near Toledo.