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HSChapter 72
U.S. imports of high-purity sponge iron and other spongy ferrous products (≥99.94% fe) (HS 720390) totaled $446K in April 2026, traded with 6 countries.
Importers of High-Purity Sponge Iron and Other Spongy Ferrous Products (≥99.94% Fe) paid $45K in duties in April 2026 — an effective duty rate of 10% on $446K in dutiable value, based on actual customs collections rather than the published tariff schedule. High-Purity Sponge Iron and Other Spongy Ferrous Products (≥99.94% Fe) imports of $446K in April 2026 ran 16% below the year-to-date monthly average of $533K.
Last updated: April 2026 dataUltra-high-purity iron at 99.94% or greater by weight occupies a niche above standard DRI, serving powder metallurgy, specialty magnetics, and precision alloy applications where trace impurities are unacceptable. Japan and China are the leading US suppliers, reflecting their advanced powder-iron and specialty-metal industries. The single tariff line (7203900000) covers both spongy forms and high-purity iron in lumps or pellets, so the critical classification question is whether the iron meets the 99.94% purity threshold — material falling short belongs in heading 7203.10 or elsewhere.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
CBP typically requires a mill certificate or third-party laboratory analysis confirming the iron content by weight meets or exceeds 99.94%. The certificate should identify the test method used (e.g., spectrometric analysis) and accompany the commercial invoice. Discrepancies between declared and tested purity can trigger reclassification into a lower-purity heading.
Powder metallurgy (sintered parts, metal injection molding), soft magnetic components, and specialty alloy production are the primary consumers. The stringent purity requirement excludes most steelmaking applications, making this a relatively low-volume but high-value niche within the broader ferrous materials market.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 7203900000 | OTHR SPONGY FERROUS PRDCTS MIN PURITY 99.94 PCT FE | $446K | 10.00% | $45K |
OTHR SPONGY FERROUS PRDCTS MIN PURITY 99.94 PCT FE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7203900000 | SPONGY FERROUS PRDCTS MIN PURITY 99.94 PCT FE, NES | $62.0M |
SPONGY FERROUS PRDCTS MIN PURITY 99.94 PCT FE, NES
164.4K t
NONALLOY PIG IRON 0.5 PRCNT OR LESS PHOSPHORUS
HS 720110
SEMIFINISHED PRODUCTS OF ALLOY STEEL NOT STAINLESS
HS 722490
SMFD IRN/NAL STL LT .25 PCT CRB RECT CS WID 2X THK
HS 720712
FR IOS NAL 600MM AO W TIN CTD OR PLTD UNDR 0.5MM T
HS 721012
FERROUS WASTE & SCRAP NESOI, TURNINGS, CHIPS ETC
HS 720441
FERROUS WASTE & SCRAP NESOI
HS 720449
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CORPUS CHRISTI, TX | -- | $58.3M | +$58.3M |
| PORT HURON, MI | -- | $3.7M | +$3.7M |
| NEWARK, NJ | $351K | $20K | -$331K |