Steel Technologies LLC is buying Stripco LLC, Stripco Sales Co. LLC and Stripco Express Inc. for an undisclosed amount.

The companies, headquartered in Mishawwaka, Ind., provide steel processing and related services.  

Louisville, Ky.-based Steel Technologies is also a steel processor. The acquisition of Stripco will add another facility, expanding Steel Technologies facilities to 25. 

The buyer is a joint venture between Charlotte, N.C.-based Nucor Corp., a steel manufacturer, and Mitsui & Co. (USA) Inc., part of Tokyo-based global investment group Mitsui & Co. Ltd.

Other steel-related deals include Saw Mill Capital LLC's December purchase of Janus International Corp., which makes steel roll-up doors, and Reliance Steel & Aluminum Co.'s (NYSE: RS) deal for Haskins Steel Co. Inc., in November.