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HSChapter 51
U.S. imports of carbonized wool, not carded or combed (HS 510130) totaled $164K in April 2026, traded with 7 countries.
Importers of Carbonized Wool, Not Carded or Combed paid $16K in duties in April 2026 — an effective duty rate of 9.4% on $164K in dutiable value, based on actual customs collections rather than the published tariff schedule. Carbonized Wool, Not Carded or Combed imports of $164K in April 2026 ran 278% above the year-to-date monthly average of $43K.
Last updated: April 2026 dataCarbonization — treating wool with sulfuric acid or similar agents to destroy embedded vegetable matter — is the defining processing step that places raw wool in this heading rather than the greasy or scoured headings. Australia leads US imports, with China and the United Kingdom also supplying carbonized wool. The four 10-digit lines distinguish wool that has received no processing beyond carbonization (5101304000) from further-processed or finer-grade material, with fineness thresholds at 40S. Carbonized wool is a key input for woolen (as opposed to worsted) spinning systems, where vegetable contamination would otherwise degrade yarn quality.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Yes — carbonization is often performed on scoured wool. When both processes have been applied, heading 510130 governs, because carbonization is the more specific processing criterion. The degreased headings (510121 and 510129) explicitly exclude carbonized wool, so the presence of carbonization always directs classification to 510130.
Line 5101304000 covers wool that has been carbonized and received no further processing beyond that step. Lines 5101306500 and 5101307000 apply to carbonized wool that has undergone additional processing: 5101306500 is limited to wool not finer than 40S, while 5101307000 is the general residual for other carbonized wool. The processing history and fineness grade together determine which line applies.
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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 |
|---|---|---|---|---|
| 5101304000 | WOOL, NT CD R CM: CRBNZD: NT PROCESS BEYOND CRBNZD | $163K | 9.47% | $15K |
| 5101306500 | WOOL, NOT CD/CM:CARBONIZED:OTHER:NT FINER THAN 4OS | $1K | 7.17% | $79 |
| 5101307000 | WOOL, NOT CARDED OR COMBED: CARBONIZED: OTHER | $0 | -- | -- |
WOOL, NT CD R CM: CRBNZD: NT PROCESS BEYOND CRBNZD
WOOL, NOT CD/CM:CARBONIZED:OTHER:NT FINER THAN 4OS
WOOL, NOT CARDED OR COMBED: CARBONIZED: OTHER
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 5101300000 | WOOL NOT CARDED OR COMBED CARBONIZED | $6K |
WOOL NOT CARDED OR COMBED CARBONIZED
1.7K kg
YARN, COMBED WOOL, NOT RETAIL, NOT UN 85% WT WOOL
HS 510710
WOVEN FABRICS OF COMBED WOOL OR FAH >=85% WL/FAH O
HS 511219
YARN & FINE AN HAIR, RETAIL PK, NOT UN 85% WL OR H
HS 510910
YARN, CARDED WOOL, NOT RETAIL, NOT UN 85% WT WOOL
HS 510610
WOV FAB CRD WL/FAH >=85% WL/FAH NESOI
HS 511119
WV FB CMB WL/FAH >=85% WL/FAH WEIGHT <=200G/M2
HS 511211
| State | Imports | Exports | Balance |
|---|---|---|---|
| Oregon | $150K | -- | -$150K |
| New Jersey | $14K | -- | -$14K |
| Florida | -- | $6K | +$6K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| SEATTLE, WA | $150K | -- | -$150K |
| NEWARK, NJ | $14K | -- | -$14K |
| MIAMI, FL | -- | $6K | +$6K |