This book covers the report of an investigation into the enhancement of the tensile properties of sand cast cartridge (70/30) brass by the addition of manganese (Mn) and silicon (Si) as alloying elements and low temperature annealing heat treatment. Microstructural characterization and tensile tests were performed on cast, machined and heat treated specimens. It was concluded that cartridge brasses subjected to alloying and annealing treatments had improved tensile properties at stress relieve annealing temperatures.