Usually the silicon content in silicon metal is above 98.5, and according to the different contents of impurities such as iron, aluminum and calcium, it is divided into different grades, such as silicon metal 553, 441, 421, 3303, etc.

Silicon metal plays a key role in alloy formulation. Silicon aluminum alloy, especially silicon alloy with the largest usage, is a strong composite deoxidizer that can effectively improve the utilization rate of deoxidizers in the steelmaking process and further purify the molten steel, thereby improving the quality of steel. In addition, the low density and low thermal expansion coefficient of silicon aluminum alloy give it excellent casting performance and wear resistance. Therefore, alloy castings cast with silicon aluminum alloy not only have strong impact resistance, but also have good high-pressure compactness, which greatly extends its service life. This alloy is often used in the manufacture of aerospace vehicles and automotive parts.

silicon metal

chemical composition

Silicon Metal	Grade	Chemical Composition
		Si(%)	Impurity Content
		Si(%)	Fe(%)	Al(%)	Ca(%)	P(PPM)
	97	>97.0%	≤1.5	≤0.5	≤0.3
	553	>98.5%	≤0.5	≤0.5	≤0.3	-
	441	>99.0%	≤0.4	≤0.4	≤0.1
	3303	>99.3%	≤0.3	≤0.3	≤0.03	≤50
	2502	>99.5%	≤0.25	≤0.25	≤0.02	≤40
	2202	>99.5%	≤0.2	≤0.2	≤0.02	≤40
	421	>99.2%	≤0.4	≤0.2	≤0.1	-
	411	>99.2%	≤0.4	≤0.1	≤0.1	-

Industrial silicon of various grades flows to different fields, and can be divided into metallurgical grade and chemical grade.

Metallurgical grade

Metallurgical grade industrial silicon is mainly used to manufacture aluminum alloys as an additive to increase the strength and toughness of the alloy. The main grades are 553#, 551#, 441# and 3303#. Among them, the demand for industrial silicon for cast aluminum alloy is significantly higher than that for deformed aluminum alloy.

Chemical grade

Chemical grade industrial silicon can be used to produce organosilicon and polysilicon. The former uses brands 421#, 411#, 521# and 2202#, while the latter mainly uses 421# and 521#.

silicon metal

Powerful supplier

Henan Aon Metal and Materials Co., Limited: Located in Anyang, Henan, it is an enterprise mainly engaged in ferrosilicon, silicon metal, silicon carbide, ferroalloy, cored wire and other products. Its metal silicon products are of reliable quality and can provide metal silicon of various specifications to meet the needs of different customers. It has a certain degree of popularity and good reputation in the field of ferroalloys and products.

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Silicon Metal Si>=98.5%

chemical composition

Industrial silicon of various grades flows to different fields, and can be divided into metallurgical grade and chemical grade.

Metallurgical grade

Chemical grade

Powerful supplier