BY 
GENN
2025/07
News
The difference between metal silicon 441 and metal silicon 553
Metal Silicon 441 (≥99.0% Si) features stricter impurity limits: iron (Fe≤0.4%), aluminum (Al≤0.4%), and calcium (Ca≤0.1%). This higher purity makes it suitable for precision applications like photovoltaic polysilicon, semiconductor-grade silicon powder, and high-end aluminum alloys where purity directly impacts performance.
Metal Silicon 553 (≥98.5% Si) allows higher impurities: Fe≤0.5%, Al≤0.5%, Ca≤0.3%. Its lower cost and moderate purity suit industrial uses like general aluminum alloy production (enhancing strength and wear resistance), silicones, and refractories.
While both are produced via carbothermic reduction in electric arc furnaces, 441 commands a higher price due to refined purification. 553 offers better cost-efficiency for bulk metallurgical processes where ultra-high purity is non-critical.
