U.S. imports of Cast Articles of Nonmalleable Cast Iron (NESOI) (HS 732510) totaled $14.3M in September 2026, imported from 40 countries.
Importers of Cast Articles of Nonmalleable Cast Iron (NESOI) paid $4.0M in duties in September 2026, an average duty rate of 27.96% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: September 2026 dataNonmalleable (gray) cast iron castings not elsewhere specified include a broad range of municipal infrastructure and utility products: manhole covers, catch basin grates, cleanout covers, valve boxes, and meter boxes each have dedicated 10-digit lines (7325100010 through 7325100035), with a residual line (7325100080) for other articles. These products are critical inputs for water, sewer, and stormwater infrastructure projects, and procurement is often subject to Buy America requirements under federal grant programs. India leads US imports, followed by China and Mexico.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1.2K import shipments a month
Yes. Federal infrastructure grant programs — including those administered under the Infrastructure Investment and Jobs Act — typically impose Buy America requirements mandating that iron and steel products used in covered projects be produced in the United States. Imported cast iron manhole covers, grates, and frames would generally not satisfy these requirements unless a waiver is granted. Importers and project owners should review the specific grant terms and consult legal counsel before specifying imported castings on federally funded work.
The schedule provides dedicated lines for manhole covers, rings, and frames (7325100010); catch basin grates and frames (7325100020); cleanout covers and frames (7325100025); valve and service boxes (7325100030); and meter boxes (7325100035). All other nonmalleable cast iron articles not elsewhere specified fall under 7325100080. Correct line selection depends on the specific function of the casting, not just its shape.
Subheading 2 of 3 in heading 7325
Subheading 732510 · $14.3M of $33.6M
ImportsExports
Imports
$14.3MYoY · free account
Exports
$3.7MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to September 2026, the U.S. imported $183.6M of Cast Articles of Nonmalleable Cast Iron (NESOI) and exported $44.6M.
Through September 2026. Source: U.S. Census Bureau.
Trade Directory
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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 |
|---|---|---|---|---|---|
| 7325100080 | Other Nonmalleable Cast Iron; NESOI | $6.1M | 44.73% | 91.25% | $2.7M |
| 7325100010 | Manhole Covers, Rings A Frames, Nonmalbl Cast Iron | $2.9M | 14.28% | 88.60% | $412K |
| 7325100030 | Nonmalleable Cast Iron, Valve and Service Boxes | $2.1M | 17.31% | 95.75% | $356K |
| 7325100020 | Nonmalleable Cast Iron Catch Basin, Grate, Frame | $1.9M | 15.18% | 83.91% | $289K |
| 7325100035 | Meter Boxes of Nonmalleable Cast Iron | $654K | 9.55% | 95.20% | $62K |
| 7325100025 | Nonmalleable Cast Iron, Cleanout Covers and Frame | $392K | 14.67% | 77.92% | $57K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7325100000 | Cast Articles NESOI of Nonmalleable Cast Iron | $3.8M |
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.
Imports · September 2026
origin
India and China together supply 84% of it. China pays 61.2% duty; Mexico 6.3%.
customs district
destination
entry
rate provision · imports
4.7% enters free of duty; duty collected equals 27.96% of imports for consumption.