HS Code for Ferrosilicon

Ferrosilicon containing 55% or less of silicon by weight is classified under HS code 7202.29. Ferro-alloys are defined in Note 1(c) to Chapter 72 as alloys in pigs, blocks, lumps, or similar primary forms, used as additives in the manufacture of other steels. Ferrosilicon is a primary ferro-alloy used for deoxidizing steel and as an alloying element to improve hardness and tensile strength. The Harmonized System splits ferrosilicon into two primary subheadings based on the weight percentage of silicon. Subheading 7202.21 is reserved for ferrosilicon containing more than 55% silicon, while 7202.29 covers all other ferrosilicon with 55% or less silicon. This distinction is vital because the silicon content significantly impacts the material's value and its application in the metallurgical process. Importers must provide a chemical analysis report to justify the use of 7202.29 over the higher-silicon alternative.

Products Included

• Ferrosilicon with 15% to 55% silicon content
• Low-silicon ferrosilicon lumps
• Ferrosilicon briquettes (55% or less Si)
• Ferrosilicon powder for heavy media separation

Common Misclassification

The most frequent misclassification is using HS code 7202.21 for material that actually contains 55% or less silicon. Conversely, if the silicon content exceeds 55%, 7202.29 cannot be used. Another error is classifying the product as silicon metal under HS code 2804.61 or 2804.69. Silicon metal is a chemical element with very low iron content, whereas ferrosilicon is an alloy of iron and silicon. If the iron content is high enough to meet the definition of a ferro-alloy, it must stay in Chapter 72.

FAQ

What is the HS code for Ferrosilicon?

If the silicon content is 55% or less by weight, the HS code is 7202.29. If it is higher, it is 7202.21.

How is the silicon percentage verified for customs?

Customs authorities typically require a Mill Test Certificate (MTC) or an independent laboratory assay to verify the precise weight percentage of silicon and iron.