The Section 232 duty treatment of an aluminum casting cannot be determined from the words aluminum casting alone. The importer and customs adviser need the product classification, origin, entry date and applicable measures. This page is a shipment-review checklist, not a live tariff-rate table.
Confirm the Classification Before Budgeting a Duty
Provide the part drawing, material description, intended function and delivered condition to the importer or broker. Ask which HTS classification and relevant metal or derivative provisions apply. Record the reasoning and the party responsible for the classification decision.
Do not use a supplier's product category as a customs ruling. A casting incorporated into another product, a finished component and a raw casting may require different classification review. Resolve open classification questions before comparing landed costs.
Use the Entry Date and Applicable Official Notices
Trade measures can change between quotation, tooling release and importation. Use the planned entry date, origin, applicable exceptions and later amendments. The April 2026 U.S. proclamation is one dated reference; it is not a complete determination of the rules for a later shipment.
Ask the broker to verify all applicable measures and their interaction. This article does not state that all aluminum castings carry a fixed additional percentage, and it does not substitute another blanket percentage for a classification decision.
Make the Landed-Cost Worksheet Traceable
| Field | Information to record |
|---|---|
| Product | Drawing/revision, function, material and delivered condition |
| Customs basis | Classification, origin, entry date and valuation assumptions |
| Applicable measures | Official notice or rule, effective period, basis and confirmed treatment |
| Manufacturing | Tooling and recurring operations included in the supplier quote |
| Logistics | Incoterm, transport, insurance, handling and broker assumptions |
| Ownership | Importer/broker decision owner and unresolved questions |
RFQ CTA
Have a casting project? Submit the RFQ details, then email your drawing for a structured quote review.
Send the drawing, target alloy, finishing scope, MOQ, and delivery timing. Bohua will review it like a real sourcing project, not a generic contact request.
Separate currency, quoted manufacturing cost and customs value where the valuation rules require it. Do not calculate every duty as a generic markup on an unspecified supplier price.
Ask the Supplier for the Right Documents
Identify the commercial invoice, packing information, material records, origin statements and other shipment evidence required by the importer. Confirm whether smelt-and-cast information or another metal-origin record is required and what the supplier can substantiate. Do not imply that the foundry can issue evidence it does not hold.
Agree document timing before the shipment is released. Keep manufacturing quotation assumptions separate from the broker's duty determination so one can be updated without obscuring the other.
FAQ
Can a quotation use one fixed Section 232 percentage for all castings?
Not without confirming the relevant classification, origin, entry date and rules. Use a traceable shipment-specific assumption.
Can the foundry determine the importer's final tax liability?
The supplier can provide agreed product and shipment information. The importer and qualified customs adviser own the applicable import determination.
What should be sent with a sourcing RFQ?
Send the drawing, intended destination, quantity, delivery terms and required documentation through the casting RFQ form. State which customs assumptions remain subject to importer/broker confirmation.
Project CTA
Ready to Source This Part?
Submit the RFQ details here, then email your drawing for a structured DFM review and quote.