US Opens Antidumping and Subsidy Investigations Into Linear Hydraulic Cylinders From China, India, Mexico, Canada and Korea

On September 14, 2026, the U.S. Department of Commerce’s Enforcement and Compliance unit published two notices, applicable September 8, 2026, opening trade-remedy investigations into certain linear hydraulic cylinders and parts thereof. One initiates antidumping (less-than-fair-value) investigations covering Canada, China, India, Korea and Mexico (91 FR 58060, Doc 2026-18706); the other initiates countervailing duty investigations covering China, India and Mexico (91 FR 58067, Doc 2026-18707). The headline detail for a metal-parts buyer is the scope: it reaches beyond finished cylinders to the precision-machined steel barrels and chrome-plated, machined steel piston rods that are core turned, bored, honed and milled components in their own right.

This matters to anyone sourcing hydraulic cylinder components or similar precision-machined steel parts. The investigations cover specific origin flows and producers and set the stage for cash-deposit requirements that land in an importer’s landed cost. Below, what the notices establish versus what remains a petition-stage allegation.

What the Initiation Notices Establish

The confirmed, dated facts come straight off the notices. Commerce received the petitions on July 29, 2026, filed by the Hydraulic Cylinders Fair Trade Coalition and named domestic producers. On August 18, 2026, Commerce extended the initiation deadline by 20 days to poll the domestic industry (91 FR 53848); the deadline landed on September 8, 2026.

The period of investigation is defined per country. For the antidumping case, the POI for Canada, India, Korea and Mexico is July 1, 2025 through June 30, 2026, while the China POI is January 1, 2026 through June 30, 2026. For the countervailing duty case, the POI is January 1 through December 31, 2025.

The alleged antidumping margins in the petitions – petitioner-supplied estimates, not findings – are:

• Canada: 248.33% to 744.85%
• China: 149.86-394.07% (Malaysia surrogate); 103.05-197.07% (Mexico surrogate); 299.38-440.48% (Türkiye surrogate)
• India: 85.31% to 370.67%
• Korea: 73.09% to 158.74%
• Mexico: 56.79% to 157.12%

The countervailing duty notice states Commerce found sufficient information to initiate on 21 alleged subsidy programs for China, 33 for India and 23 for Mexico. No subsidy rates have been set yet.

Why the Scope Reaches Machine Shops

The scope is unusually relevant to component manufacturing because it covers the machined subassemblies as well as the finished cylinder. Covered cylinders must have steel barrels, a bore of 25.4 mm (one inch) or more, and a retracted length of 101.6 mm (four inches) or more. Any design meeting that description is covered – tie-rod, welded body, telescopic, plunger, rodless, differential, single or double acting, ram type and others.

Critically, the scope also covers these components when shipped as such:

• Steel barrels: processed welded or seamless steel tubes at least 101.6 mm long with an inner diameter of 25.4 mm or more that have had their inner diameter precision machined (for example through honing or skiving and burnishing) and further processed – cutting to length, end finishing such as machine-threading and chamfering, port drilling, and the addition of weldments, ports, end caps and seals.
• Steel piston rods: solid or hollow steel bars or tubes at least 101.6 mm long that have been hard chrome plated or chrome coated, cut to length, and machined to be a piston rod.
• Attached parts: flanges, trunnions, clevises, pistons, rings, gaskets, seals, valves, sensors and hydraulic tubing imported with, attached to, or invoiced with a covered cylinder, barrel or rod.

Two boundaries matter. The scope does not cover those attachments when imported or invoiced separately, and it reaches goods that undergo minor processing in a third country that would not have removed them from scope if done in the country of manufacture. Listed HTSUS codes are 8412.21.0015, .0030, .0045, .0060, .0075 and 8412.90.9005.

That is why cylinder work sits in the same orbit as other precision turned and bored parts covered by trade actions, such as the countervailing duty review of brass rod from Korea: trade relief attaches to a scoped product and a determined origin.

1. A Petition-Stage Number Is Not a Deposit Rate

The margins above are allegations by the petitioners, not determinations; Commerce has only now initiated the cases. The antidumping preliminary determinations are due no later than 140 days after initiation, and the countervailing duty preliminary determinations no later than 65 days after initiation, unless postponed. Any company-specific rate emerges only then, so pricing a barrel or cylinder on today’s petition figures is pricing on a placeholder.

2. The Injury Hurdle Comes First

Commerce’s initiation is not the only gate. The U.S. International Trade Commission must make its preliminary injury determination within 25 days of receiving notice, and a negative ITC determination for any country ends the investigation. A country can be named and still drop out before any margin is finalized.

3. Component-Level Origin Is the Exposure Point

Because the scope captures barrels and rods as subject merchandise, the exposure is not limited to whoever assembles the complete cylinder. A supplier of honed steel barrels or chrome-plated, machined piston rods into the United States – or a machining shop whose output is a covered barrel or rod – sits inside the definition. The producing entity, not just the country, decides any future company-specific rate, and all-others rates can differ sharply from respondent rates, as in the proposed Section 232 derivative-article additions that also named hydraulic parts.

What Buyers of Cylinders, Barrels and Rods Should Verify

Nothing here changes the mechanical properties of any steel or the properties of a honed bore or a chrome-plated rod, and no duty applies yet. What it supports is a short, reusable sourcing check:

• Map the scope against your parts. Confirm whether each part is a covered cylinder, a covered steel barrel (precision-machined bore, 25.4 mm or more), or a covered chrome-plated, machined piston rod – and whether it ships with or separately from a cylinder.
• Establish producing origin, not just assembly country. Document where the barrel or rod is actually made, since third-country minor processing does not remove merchandise from scope.
• Watch the two clocks. Track the CVD preliminary (about 65 days from initiation) and the AD preliminary (about 140 days), plus the ITC’s 25-day injury vote.
• Model landed cost with duty pass-through. Confirm which party is importer of record and whether a quote assumes future cash-deposit pass-through.
• Separate-scope discipline. Keep separately imported fittings, seals, valves and tubing clearly outside covered barrel and rod shipments.

Limited Conclusions

What is established and dated: on September 8, 2026, with notices published September 14, 2026, Commerce initiated antidumping investigations into linear hydraulic cylinders and parts from Canada, China, India, Korea and Mexico (A-122-879, A-570-240, A-533-952, A-580-923, A-201-870) and countervailing duty investigations into the same products from China, India and Mexico (C-570-241, C-533-953, C-201-871). The scope reaches precision-machined steel barrels and chrome-plated, machined piston rods, and the alleged margins run wide – from the mid-50s to over 700 percent – but remain petition-stage allegations pending the ITC injury vote and Commerce’s preliminary determinations.

The durable takeaway: trade-remedy exposure on machined parts attaches at the level of the scoped component and the producing country, not the finished assembly. This notice implies no change to any specific part’s physical properties or quoted price, but the general habit – identify producing origin, keep a defensible paper trail, and price on landed cost including applicable duties – keeps cost, quality and compliance decisions audit-ready.

References

• Commerce, Enforcement & Compliance. “Certain Linear Hydraulic Cylinders and Parts Thereof From Canada, the People’s Republic of China, India, the Republic of Korea, and Mexico: Initiation of Less-Than-Fair-Value Investigations.” Federal Register Doc 2026-18706, 91 FR 58060, September 14, 2026 (applicable September 8, 2026). Retrieved September 14, 2026. federalregister.gov/documents/2026/09/14/2026-18706
• Commerce, Enforcement & Compliance. “Certain Linear Hydraulic Cylinders and Parts Thereof From the People’s Republic of China, India, and Mexico: Initiation of Countervailing Duty Investigations.” Federal Register Doc 2026-18707, 91 FR 58067, September 14, 2026 (applicable September 8, 2026). Retrieved September 14, 2026. federalregister.gov/documents/2026/09/14/2026-18707
• Official PDFs, govinfo.gov (U.S. GPO): FR Doc 2026-18706, 91 FR 58060-58066, and FR Doc 2026-18707, 91 FR 58067-58071, September 14, 2026. FR-2026-09-14/pdf/2026-18706.pdf and …/2026-18707.pdf
• Initiation deadline extension, 91 FR 53848 (August 18, 2026), cited in the September 14 notices.

Need a DFM and sourcing review on hydraulic cylinder components – turned steel barrels, machined or chrome-plated piston rods, end caps, glands, or brackets? Submit your drawing, material grade, quantity, finishing requirements, and key tolerances for a free DFM review and quote. Request a quote →