The independent observatory for US trade — ship movements,
customs records and policy events, measured and tested.
What China actually pays on suitable for use in boilers, superheaters, heat exchangers,
Importers of HS 7304.59 (suitable for use in boilers, superheaters, heat exchangers, ) from China actually paid 75.01% on the taxed portion of the value in 2026-06 — 75.01% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is Free. Over the window the rate on the taxed portion moved 9.55% → 75.01%, with the largest single step +36.4pp in 2025-05. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is Free — importers actually paid 75.01%, so the trade-war overlay added 75 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "7304.59", origin: "China") · see it at trimtabist.com/tariffs
HS 7304.59. The schedule base rate is
Free; importers from China actually paid 75.01% on the
dutiable value in 2026-06 — the trade-war overlay added 75 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 9.55% (2023-07) → 75.01% (2026-06), largest single step +36.4pp in 2025-05.
The trade-war measures that name China or this sector
15 Chapter-99 measures name China; scope mapping is partial (several annexes are PDFs) — absence never means exemption. They do not sum, and some are product-specific — the collected rate above is the composed truth.
Implementation of Duties on Aluminum Pursuant to Proclamation 10895 Adjusting Imports of Aluminum Into the Uni measure 9903.85.67 · Federal Register citation+200%
Notice of Modification: China's Acts, Policies and Practices Related to Technology Transfer, Intellectual Prop measure 9903.91.03 · Federal Register citation+100%
Notice of Modification: China's Acts, Policies and Practices Related to Technology Transfer, Intellectual Prop measure 9903.91.08 · Federal Register citation+100%
Notice of Modification and Proposed Modification of Section 301 Action: China's Targeting of the Maritime, Log measure 9903.91.14 · Federal Register citation+100%
Procedures for Submissions by Certain Steel and Aluminum Producers Committing to New U.S. Steel or Aluminum… measure 9903.82.02 · Federal Register citation+50%
9903.82.14 measure 9903.82.14+50%
Notice of Modification: China's Acts, Policies and Practices Related to Technology Transfer, Intellectual Prop measure 9903.91.02 · Federal Register citation+50%
Notice of Modification: China's Acts, Policies and Practices Related to Technology Transfer, Intellectual Prop measure 9903.91.05 · Federal Register citation+50%
In print: “What China actually pays on suitable for use in boilers, superheaters, heat exchangers, (HS 7304.59)” —
Trimtab US Trade Ledger (TT-010 Duty receipts), US Census imports-for-consumption records — trimtabist.com/tariff/730459/china