... Silicon Metal 1) 2202Si: 99.5%min, Fe: 0.2%max, Al: 0.2%max, Ca: 0.02%max, P: 0.004%max ... 2) 3303Si: 99.3%min, Fe: 0.3%max, Al: 0.3%max, Ca: 0.03 ... %max, P: 0.005%max 3) 411Si: 99.2%min, Fe: 0 ... .4%max, Al: 0.1%max, Ca: 0.1%max, P ... : 0.005%max 4) 421Si: 99.2%min, Fe: 0.5%max, Al: 0.2%max, Ca: 0.1%max, P: 0 ...