Section 232: National Security Tariffs
Section 232 of the Trade Expansion Act of 1962 allows the president to impose tariffs on imports deemed a threat to national security. Originally used for steel and aluminum, Trump 2.0 expanded it to cover automobiles, auto parts, furniture, and heavy trucks.
Steel & Aluminum Rate
🏗️25%
No more exclusions since Feb 2025
Auto Tariff
🚗25%
Effective April 3, 2025
Downstream Jobs Lost
⚠️75,000
Manufacturing, construction, agriculture
Cost Per Job Saved
💰$900K
Tax Foundation estimate
The Full History of Section 232
Origins: The Trade Expansion Act of 1962
Section 232 was signed into law by President Kennedy as part of the Cold War-era Trade Expansion Act. The original intent was narrow: if imports of a specific product threatened the nation's ability to produce goods essential for national defense, the president could restrict them. For decades, it was rarely invoked — the Department of Commerce conducted only a handful of investigations, mostly related to oil imports in the 1970s and 1980s.
2002: Bush's Steel Tariffs — The First Test
In March 2002, President George W. Bush imposed tariffs of 8–30% on imported steel under Section 201 (safeguard provisions), not Section 232. However, the episode is foundational context: the WTO ruled the tariffs illegal in November 2003, and Bush lifted them after just 21 months under threat of EU retaliation targeting politically sensitive states like Florida and Michigan. The lesson — that steel tariffs invite fierce retaliation — was ignored 15 years later.
2018: Trump 1.0 Invokes Section 232
On March 8, 2018, President Trump signed proclamations imposing a 25% tariff on imported steel and a 10% tariff on imported aluminum, citing national security concerns. Commerce Secretary Wilbur Ross had conducted an investigation concluding that import levels threatened the domestic steel industry's viability. The tariffs applied globally — hitting allies like Canada, the EU, Japan, and South Korea alongside China. This was the first significant use of Section 232 for tariffs since the statute's creation. Initial exemptions were granted to allies, creating a complex web of country-specific exclusions.
2019–2021: Exclusions, Quotas, and Retaliation
The exemption system became unwieldy — Commerce processed over 500,000 exclusion requests. The EU, Canada, Mexico, and others imposed retaliatory tariffs on American bourbon, Harley-Davidsons, blue jeans, and agricultural products. Canada and Mexico were eventually exempted as part of the USMCA trade deal, while the EU and UK remained subject to tariffs.
2022: Biden Converts to Tariff-Rate Quotas
Rather than eliminate Section 232 tariffs, President Biden converted them for the EU, UK, and Japan into tariff-rate quotas (TRQs) — allowing a certain volume duty-free, with the 25% tariff applying above the quota. This eased tensions with allies but kept the fundamental tariff architecture in place. Chinese steel remained subject to both Section 232 (25%) and Section 301 tariffs (25%), resulting in a 50% combined rate.
2025: Trump 2.0 — Expansion and Escalation
Upon returning to office, President Trump dramatically expanded Section 232. In February 2025, all existing exclusions and TRQs were eliminated — every country now faces the full 25% on steel and aluminum with no exceptions. The aluminum rate was raised from 10% to 25%. In April, a 25% tariff on imported automobiles took effect, followed by auto parts in May. Additional investigations were launched into furniture, heavy trucks, and potentially semiconductors. The expansion transformed Section 232 from a targeted metals tariff into a broad industrial policy tool.
Current Section 232 Tariff Rates
| Product | Rate | Effective | Expanded |
|---|---|---|---|
| Steel | 25% | 2018-03-23 | 2025-02-10 |
| Aluminum | 25% | 2018-03-23 | 2025-02-10 |
| Automobiles | 25% | 2025-04-03 | — |
| Auto Parts | 25% | 2025-05-03 | — |
| Furniture (Metal/Aluminum) | 25% | 2025-02-10 | — |
| Heavy Trucks | 25% | 2025-04-03 | — |
Since February 2025, all country exclusions and tariff-rate quotas have been eliminated. Every trading partner faces the full rate with no exceptions.
Steel Price Index (Hot-Rolled Coil, $/ton)
Prices spiked 39% in the first year of Section 232 tariffs (2018), hit a pandemic-driven peak of $1,950/ton in 2021, and have settled around $940/ton — still 52% above pre-tariff levels.
💰 Cost Per Job Saved: $900,000
The most damning statistic about Section 232: American consumers and businesses paid $72 billion annually in higher steel and aluminum costs to protect roughly 6,400 jobs in domestic mills and smelters. That works out to approximately $900,000 per job saved— more than 16 times the median steel worker's salary.
| Annual consumer cost of steel tariffs | $72B |
| Steel + aluminum jobs protected | ~6,400 |
| Cost per protected job | $900,000 |
| Median steel worker salary | $55,000 |
| Multiplier: cost vs. salary | 16.4× |
| Downstream jobs lost | 75,000 |
| Net jobs destroyed | ~68,600 |
Source: Tax Foundation, Federal Reserve, Peterson Institute estimates (2025). Net jobs figure reflects the gap between 6,400 protected and 75,000 lost downstream.
Historical Timeline
Bush imposes steel tariffs (8–30%)
WTO rules tariffs illegal; Bush lifts them after 21 months
Trump invokes Section 232: 25% steel, 10% aluminum
Exemptions granted to select allies (Australia, Brazil, Argentina, South Korea)
Biden converts EU/UK/Japan tariffs to tariff-rate quotas
Biden triples 301 tariff on Chinese steel to 25%, keeps 232 in place
Trump 2.0 eliminates all 232 exclusions; aluminum raised to 25%
April: 25% tariff on imported automobiles takes effect
May: 25% tariff on auto parts takes effect
Jobs: Protected vs. Lost
Source: Tax Foundation, Federal Reserve estimates, 2025
Winners vs. Losers
Section 232 created a stark divide: a handful of domestic steel and aluminum producers reaped record profits, while the vastly larger universe of downstream manufacturers — who use steel and aluminum as inputs — absorbed billions in higher costs.
US Steel Mills
Nucor, US Steel, Steel Dynamics saw record profits in 2021-2022
US Aluminum Smelters
Century Aluminum restarted idled capacity in Kentucky
Auto Manufacturers
Ford estimated $1.5B annual cost increase; GM paused EV investments
Construction
Steel rebar & structural steel costs up 40%, delaying infrastructure projects
Appliance Makers
Whirlpool initially supported tariffs, then reversed as costs rose
Agriculture Equipment
John Deere, AGCO faced higher input costs plus retaliatory tariffs on exports
Oil & Gas Pipelines
Pipeline-grade steel costs spiked, delaying Permian Basin projects
Can & Container Mfg
Beer, soda, and food cans saw 15-20% cost increases
Did Tariffs Reduce Imports?
Steel Imports
27.2% decline
$34.6B (2017) → $25.2B (2024)
Imports fell, but much of the decline reflects trade diversion — steel routed through third countries like Vietnam and Mexico to avoid direct tariffs.
Aluminum Imports
26.1% decline
$6.9B (2017) → $5.1B (2024)
Domestic aluminum production increased only modestly. Much of the "reduction" was actually reclassification and downstream processing shifts.
Auto Tariff Impact
Avg. Price Increase per Vehicle
🚗$6,200
On imported vehicles
Domestic Price Spillover
📈$2,800
Even US-made cars cost more
Vehicles Affected
🚛8.3M
Imported annually
Est. Annual Revenue
💵$52B
From auto tariffs alone
The 25% auto tariff represents the most consumer-visible Section 232 action. Even "American-made" vehicles contain 40–60% foreign parts — meaning domestic sticker prices rose by an estimated $2,800 due to parts cost pass-through.
Most affected brands: Toyota, Honda, Hyundai/Kia, BMW, Mercedes-Benz, and Volkswagen — which together account for over 60% of US imports. Japanese automakers alone face an estimated $18 billion in additional annual costs.
Source: Peterson Institute for International Economics, 2025
Related Product & Country Profiles
Related Analysis
🇨🇳 Section 301
China tariffs — often stacked on top of 232
⚖️ IEEPA Saga
Emergency tariffs struck down by SCOTUS
📉 GDP & Jobs Impact
Full economic cost across all tariffs
🏭 Industry Scoreboard
Winners and losers by sector
📊 Effective Rate
How 232 fits into overall tariff burden
🌍 Country Profiles
See steel/aluminum tariffs by country