N the modern CNC machining industry, CNC machining brass and copper parts have always been the most popular. Copper is the most friendly processing material in CNC machining. Brass is a kind of copper alloy with zinc as the main additive element, presenting the beautiful yellow color. The proportions of zinc and copper can be varied to create a range of brasses with varying propert... https://www.jtrmachine.com/cnc-machining-brass-and-copper-parts