Calcium Silicon 24/70 Deoxidizer Lump
This ferroalloy grade with 24% calcium and 70% silicon is supplied in lump form (10-50mm) for use in secondary steel refining. Classified under HTS 7202.99.20.00 as calcium silicon, it provides both deoxidation and desulfurization functions in ladle metallurgy.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If predominantly ferro-silicon with minimal calcium (<10%)
Ferro-silicon containing by weight more than 3% calcium classifies under 7202.21, not as pure calcium silicon.
If manufactured into cored wires for continuous feeding
Cored wire electrodes containing calcium silicon are classified as welding electrodes in heading 8311.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Lump size specification (10-100mm typical) should be documented; fines under 10mm may face different handling requirements
• Include safety data sheets noting pyrophoric properties when wet; pitfall is incorrect hazmat class (often UN1405)
• Confirm no cored wire format, as that changes classification to 8311.20
Related Products under HTS 7202.99.20.00
Calcium Silicon 30/65 Ferroalloy
Calcium silicon 30/65 is a ferroalloy containing approximately 30% calcium and 65% silicon, used primarily as a deoxidizer and desulfurizer in steel production. It falls under HTS 7202.99.20.00 as a specific type of calcium silicon ferroalloy not elsewhere specified in heading 7202. This master alloy helps control non-metallic inclusions in molten steel.
Calcium Silicon Cored Wire Filler
Bulk calcium silicon powder used as filler material for manufacturing cored wires in steel treatment stations. While the final cored wire is elsewhere classified, the pure calcium silicon filler remains under HTS 7202.99.20.00 as the base ferroalloy.
Steelmaking Calcium Silicon Lumps 10-50mm
Standard 10-50mm lumps of calcium silicon ferroalloy for direct addition to steel ladles. Essential for sulfur removal in stainless and specialty steel production, properly classified under HTS 7202.99.20.00.
Low-Aluminum Calcium Silicon 25/65
Specialty grade with reduced aluminum (<1%) for electrical steel production where Al inclusions must be minimized. Falls squarely under HTS 7202.99.20.00 as calcium silicon ferroalloy.
High-Purity Calcium Silicon 28/58
Premium grade calcium silicon with 28% Ca and 58% Si, low impurities (Al<1.5%, C<0.2%), used in high-quality steel production like automotive sheet. HTS 7202.99.20.00 covers this essential steelmaking alloy for inclusion control.
Industrial Calcium Silicon 30/60 Briquettes
Calcium silicon 30/60 formed into briquettes (50x50mm) for easier handling and reduced dust in steel plants. This physical form of the ferroalloy is still classified under HTS 7202.99.20.00 as calcium silicon, not further worked beyond simple compaction.