金屬硅:

化學成份：
2202級 si >99.5% fe≤0.2 al≤0.2 ca≤0.02 P≤0.004%

3303級 si >99.3% fe ≤0.3 al≤0.3 ca≤0.03 P≤0.005%

441級  si >99.0% fe ≤0.4 al≤0.4 ca≤0.1

553級  si >98.5% fe ≤0.5 al≤0.5 ca≤0.3