工业金属板块9月12日涨2.83%，电工合金领涨，主力资金净流入8.26亿元

Group 1 - The industrial metal sector increased by 2.83% on September 12, with Electric Alloy leading the gains [1] - The Shanghai Composite Index closed at 3883.69, up 0.22%, while the Shenzhen Component Index closed at 12996.38, up 0.13% [1] - Key stocks in the industrial metal sector showed significant price increases, with Electric Alloy rising by 17.29% and trading volume of 726,500 shares [1] Group 2 - The industrial metal sector saw a net inflow of 826 million yuan from main funds, while retail investors experienced a net outflow of 165 million yuan [2] - The stock of Northern Copper had a net inflow of 495 million yuan from main funds, representing 33.40% of its total trading [3] - Electric Alloy experienced a net outflow of 112 million yuan from speculative funds, indicating a shift in investor sentiment [3]