U.S. imports of Iron & Non-Stainless Steel Butt Welding Fittings (HS 730793) totaled $31.2M in August 2026, imported from 30 countries.
Importers of Iron & Non-Stainless Steel Butt Welding Fittings paid $16.5M in duties in August 2026, an average duty rate of 51.89% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Iron & Non-Stainless Steel Butt Welding Fittings imports of $31.2M in August 2026 ran 23% above the year-to-date monthly average of $25.3M.
Last updated: August 2026 dataButt welding fittings — including elbows, reducers, tees, and caps — are permanently welded into high-pressure piping systems used in oil-and-gas, power generation, and chemical processing, making material certification and dimensional standards critical at entry. Italy and South Korea lead US imports under this heading, with Malaysia, Canada, and Vietnam also significant sources. The eight 10-digit lines segment by alloy type (iron/nonalloy vs. non-stainless alloy steel), machining status, and inside-diameter threshold (below or at/above 360 mm). Section 232 tariffs apply broadly, and importers should verify whether specific antidumping or countervailing duty orders cover the alloy grade and origin combination being imported.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1.6K import shipments a month
The US schedule separates fittings that have not been machined, tooled, or otherwise processed from those that have. An unprocessed forged blank and a finished machined fitting of the same alloy and diameter can fall under different 10-digit lines, so importers must confirm the manufacturing stage at the time of export.
End-users in pressure-service applications generally require mill test reports (MTRs) certifying compliance with ASTM A234 or equivalent standards, along with heat and lot traceability. Customs brokers may also need a manufacturer's affidavit confirming country of origin, particularly where circumvention of antidumping orders is a concern.
Subheading 6 of 10 in heading 7307
Subheading 730793 · $31.2M of $280.0M
ImportsExports
Imports
$31.2MYoY · free account
Exports
$2.9MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $291.6M of Iron & Non-Stainless Steel Butt Welding Fittings and exported $33.3M.
Through August 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 |
|---|---|---|---|---|---|
| 7307939040 | Butt Weld Fit, Ins Diam>=360mm, Irn/Nnalloy, NESOI | $15.8M | 51.96% | 100.00% | $8.2M |
| 7307933040 | Butt Weld Fit, Ins Diam < 360mm, Irn/Nnalloy, NESOI | $10.4M | 51.96% | 99.97% | $5.4M |
| 7307939060 | Butt Welding Fittings Aly Stl Ex Stnl Dia 360mm Om | $2.4M | 53.66% | 100.00% | $1.3M |
| 7307936000 | Butt Welding Fittings Aly Stl Ex Stnls Dim Lt 360m | $2.3M | 48.24% | 100.00% | $1.1M |
| 7307939010 | Butt Weld Fit, In Dia>=360mm, Ir/Nal, Nt Mach/Tld/Prc | $449K | 54.30% | 100.00% | $244K |
| 7307933010 | Butt Weld Fit, In Dia<360mm, Ir/Naly, Nt Mach/Tld/Prc | $379K | 55.67% | 100.00% | $211K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7307931000 | Butt Welding Fittings of Iron or Nonalloy Steel | $2.1M |
| 7307932000 | Butt Welding Fittings of Alloy Steel not Stainless | $795K |
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 · August 2026
origin
Italy and South Korea together supply 57% of it.
customs district
destination
entry
rate provision · imports
0.0100% enters free of duty; duty collected equals 51.89% of imports for consumption.