Sipi Metals is a leading refiner of precious metal-bearing materials and is a manufacturer of copper alloys and addition agen ... ts that meet or exceed the highest industry standards. Our precious metals division serves the mining, electronics manufacturing, and e-scrap industries. Our copper alloys division is a trusted partner with the most discriminating non-ferrous foundries and alloys manufacturers. We deliver peace of mind. We're certified to ISO 9001 and ISO 14001 standards, have an exemplary environmental record, and have been independently owned since 1905. read more