Secondary aluminum alloy industry faces challenges and opportunities
----Interview with Li Hongwei
General Manager
Chengdu Sigma Nonferrous Metal Co., Ltd.
General Manager
Chengdu Sigma Nonferrous Metal Co., Ltd.
The Sigma Group, founded in 1978, primarily focuses on smelting of secondary aluminum alloy and zinc alloy and the trading of metal scrap. Sigma has sizeable plants in Taiwan (Kaohsiung) and mainland China (Shanghai, Zhangzhou, Chongqing, Rizhao, Chengdu, and Changchun), with over 1,600 employees and annual turnover of RMB8.2 billion.