Importers of HS 8302.42 (of iron or steel, of aluminum or of zinc) from Vietnam actually paid 22.8% on the taxed portion of the value in 2026-06 — 22.8% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 3.9%. Over the window the rate on the taxed portion moved 3.89% → 22.8%, with the largest single step +13.7pp in 2025-09. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 3.9% — importers actually paid 22.8%, so the trade-war overlay added 18.9 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8302.42", origin: "Vietnam") · see it at trimtabist.com/tariffs
HS 8302.42. The schedule base rate is 3.9%; importers from Vietnam actually paid 22.8% on the dutiable value in 2026-06 — the trade-war overlay added 18.9 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 3.89% (2023-07) → 22.8% (2026-06), largest single step +13.7pp in 2025-09.
Vietnam's lower duty (22.8% vs 30.39%) lets it price up to 6.2% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $1.68/kg vs $1.73/kg (duty in, freight out).
All goods from Vietnam · the whole tariff ledger · 7 CBP rulings cite this code · reproduce: tariff_story(hs: "8302.42", origin: "Vietnam") via /connect. Not customs or legal advice.