Unpolished,Mill Finish,1/2 Hard Temper 360 Brass is also known as free-machining brass. Its Low Lead content prevents successful welding However does provide lubrication to enable high-speed machining such as drilling, milling, and tapping with reduced tool wear and breakage. 360 Brass is corrosion resistant and has a smooth finish that readily accepts plating. 360 Brass is Not Heat treatable.360 Brass Meets the American Society for Testing and Materials International ASTM B16