Sigma primarily focuses on secondary aluminum smelting and metal scrap trading. The Sigma Group plays a vital role in the global aluminum recycling ecosystem, processing scrap metal from sources such as shredded autos to produce specification aluminum alloys. The finished products are sold to manufacturers of auto and motorcycle parts, home appliances, and other industrial and commercial products.
Kevin Yin
Member count: 51-200
Founded date: 1978
Investors 1
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