Janya Extrusions Pvt. Ltd. Manufactures Copper and Zinc Alloy Made Commercial Brass Tubes. Janya Extrusions Pvt. Ltd. Is an ISO 9001:2000 certified company. The company also manufactures Brass Profile, Brass Rounds, Brass Bar, Copper Bar, Copper Bus Bars, Copper Profile, Copper Rounds, Copper Tubes, Cupro Nickel Tubes, Brass Flats, and Brass Tubes. Copper and Zinc Alloy Made Commercial Brass Tubes has copper and zinc in an alloy form. A Copper and zinc alloy in the ratio of 63 % of copper & 37 % of Zinc containing small amount of Arsenic. This alloy is a good combination of strength and ductility.