Standard International Trade Classification
U.S. imports of Induction or Dielectric Industrial & Laboratory Furnaces and Ovens (SITC 74132) totaled $4.5M in August 2026, imported from 29 countries.
Importers of Induction or Dielectric Industrial & Laboratory Furnaces and Ovens paid $754K in duties in August 2026, an average duty rate of 16.80% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Induction or Dielectric Industrial & Laboratory Furnaces and Ovens imports of $4.5M in August 2026 ran 36% below the year-to-date monthly average of $7.0M.
Last updated: August 2026 dataInduction furnaces use electromagnetic fields to heat electrically conductive workpieces directly, while dielectric ovens heat non-conductive materials through high-frequency electric fields—two distinct technologies grouped here because both achieve contactless, volumetric heating. Induction melting and hardening furnaces are indispensable in steel foundries, automotive component manufacturing, and precious-metal refining, where rapid, localized heating improves metallurgical outcomes. Dielectric equipment, including radio-frequency dryers, serves the wood-products, plastics, and food-processing industries. Section 301 measures may apply to units of Chinese origin, and importers should verify the applicable subheading before sourcing decisions.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
96 import shipments a month
Multi-mode furnaces are classified according to their principal heating function. If induction heating is the primary operating mode and resistance elements serve only as auxiliary or standby heat, the unit would generally be classified here. When the functions are genuinely equal, the heading that appears last in the tariff schedule may apply, but a CBP binding ruling is the safest path for hybrid equipment.
Dielectric and radio-frequency heating equipment operates at frequencies regulated by the FCC in the United States. Imported units must comply with FCC Part 18 industrial, scientific, and medical (ISM) equipment rules, which set limits on radio-frequency emissions. Importers should obtain FCC compliance documentation from the manufacturer before entry to avoid detention or required modification at the port.
Basic heading 490 of 642 in section 7
Basic heading 74132 · $4.5M of $172.0B
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Imports · August 2026
origin
United Kingdom and Thailand together supply 47% of it. Vietnam pays 28.9% duty; Germany 9.7%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$4.5MYoY · free account
Exports
$3.2MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $74.7M of Induction or Dielectric Industrial & Laboratory Furnaces and Ovens.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.