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SITCSection 7
U.S. imports of ships' & boats' propellers and blades (SITC 74991) totaled $7.9M in April 2026, traded with 33 countries.
Importers of Ships' & Boats' Propellers and Blades paid $474K in duties in April 2026 — an effective duty rate of 7.0% on $6.8M in dutiable value, based on actual customs collections rather than the published tariff schedule. Ships' & Boats' Propellers and Blades imports of $7.9M in April 2026 ran 15% above the year-to-date monthly average of $6.8M.
Last updated: April 2026 dataMarine propellers and their replacement blades are precision-engineered components central to commercial shipping, naval, and recreational vessel propulsion. Fixed-pitch and controllable-pitch propeller designs serve distinct vessel classes, and material grade — typically nickel-aluminum bronze or stainless steel — is a key specification that affects both performance and corrosion resistance in saltwater service. Propellers for large commercial vessels are often custom-cast to order, making lead times and foundry capacity in the supplying country a significant procurement consideration. Trade in this category tracks closely with global shipbuilding activity and fleet maintenance cycles.
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Both complete propellers and their blades are explicitly covered under this heading, so replacement blades imported separately do not require reclassification. However, if blades are imported as part of a larger propulsion system assembly, the classification of the complete system may take precedence — a distinction worth confirming with a customs broker for high-value shipments.
Nickel-aluminum bronze (NAB) is the dominant alloy for commercial and naval propellers due to its corrosion resistance, strength, and machinability. Stainless steel is common for smaller or high-speed applications. The alloy grade affects both the import valuation and, potentially, whether Section 232 measures on the base metal apply to the finished casting depending on its country of origin.
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Monthly import values over time