Free Machining : A characteristic of being machined easily. For example, this may be accomplished by adding sulfur to steel or lead to brass. (COGWE, SSWID)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}