Harmonized System
U.S. exports of Unbleached Uncoated Kraft Paper & Paperboard, 225 g/m² or Over (HS 480451) totaled $7.4M in August 2026.
Importers of Unbleached Uncoated Kraft Paper & Paperboard, 225 g/m² or Over paid $246K in duties in August 2026, an average duty rate of 4.02% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Unbleached Uncoated Kraft Paper & Paperboard, 225 g/m² or Over imports of $6.1M in August 2026 ran 30% above the year-to-date monthly average of $4.7M.
Last updated: August 2026 dataHeavy-weight unbleached, uncoated kraft paperboard at 225 g/m² or above serves demanding structural applications including heavy-duty industrial bags, protective packaging, and certain construction-related substrates where maximum fiber strength and stiffness are required. Canada is the primary US supplier, with Germany and Finland also notable sources. The heading resolves to a single tariff line, 4804510000, and the 225 g/m² floor is a hard classification boundary — importers should secure certified mill test reports confirming grammage to avoid reclassification into the 150–225 g/m² heading (480441). South Korea's presence among top suppliers is also notable for buyers managing origin diversification.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
456 import shipments a month
The most frequent issue is basis weight measurement methodology: g/m² values can vary slightly depending on moisture content at the time of testing. Importers should request certified dry-basis grammage from the mill, as CBP may test samples at entry. Paperboard testing at or near 225 g/m² is at risk of falling into the 150–225 g/m² heading (480441) if the certified weight does not clearly meet the threshold.
The 225 g/m² and above range is typically used where structural rigidity and puncture resistance are critical — heavy multiwall sack inner plies, industrial protective wrapping for metal or glass, and certain construction wrap applications. These end uses require the higher caliper and stiffness that lighter grades cannot provide, making the weight threshold commercially meaningful beyond its classification function.
Subheading 6 of 12 in heading 4804
Subheading 480451 · $7.4M of $187.1M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 4804510000 | Krft Ppr/Pprbrd Unctd Unblchd 225g/M2/More Rll/Sht | $6.1M | 4.02% | 39.19% | $246K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 4804510000 | Krft Ppr/Pprbrd Unctd Unblchd 225g/M2/More Rll/Sht | $7.4M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Trade Directory
List your company under HS 480451 — Unbleached Uncoated Kraft Paper & Paperboard, 225 g/m² or Over, so the companies trading it can find you. Be the first supplier listed.
ImportsExports
Imports
$6.1MYoY · free account
Exports
$7.4MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $53.8M of Unbleached Uncoated Kraft Paper & Paperboard, 225 g/m² or Over and exported $59.2M.
Through August 2026. Source: U.S. Census Bureau.
Exports · August 2026
destination
Mexico and Canada together take 81% of it.
customs district
origin
entry
rate provision · imports
60.8% enters free of duty; duty collected equals 4.02% of imports for consumption.