U.S. Finds CGI Brake Drums From China Circumvent Existing Duties at up to 150.25% – What Casting and Machining Buyers Should Verify

On September 22, 2026, the U.S. Department of Commerce published a preliminary affirmative country-wide determination that brake drums made of compacted graphite iron (CGI) from the People’s Republic of China are later-developed merchandise that circumvents the existing antidumping and countervailing duty orders on certain brake drums from China. The cash deposit rate for the China-wide entity under the underlying antidumping order is 150.25%. The notice is dated September 17, 2026 and applies September 22, 2026.

This is not a tariff on a raw material or a new investigation into a new product. It is a finding that a material substitution inside an existing product line – gray cast iron swapped for compacted graphite iron – did not move the product out of an existing order’s scope. That distinction matters to anyone buying or finishing cast and machined vehicle components: material change, origin and finishing location are read together, not separately.

What Commerce Actually Determined

The determination was issued under section 781(d) of the Tariff Act of 1930, as amended, and 19 CFR 351.226(k) – the provision for later-developed merchandise. It rests on three dated steps:

• The underlying orders on brake drums from China and Türkiye were published August 12, 2025 (AD order 90 FR 38730; CVD order 90 FR 38753). Those orders cover brake drums made of gray cast iron, whether finished or unfinished, with an actual or nominal inside diameter of 14.75 inches or more but not over 16.6 inches, weighing more than 50 pounds.
• Commerce initiated a circumvention inquiry on January 27, 2026 (91 FR 3435), after a request from Webb Wheel Products, Inc., a domestic interested party. Mandatory respondents selected April 20, 2026: CAIEC Trailer Master Co., Ltd., Kara CVS Inc. and Trailer MASTER CVS INC.
• The preliminary determination (Doc 2026-19372, 91 FR 60082; case numbers A-570-174 and C-570-175) finds, on a country-wide basis, that CGI brake drums from China are later-developed merchandise covered by the orders. The inquiry merchandise is CGI brake drums of the same dimensional envelope (14.75 to 16.6 inches inside diameter, over 50 pounds) produced in China and exported to the United States, including model number M328D557 produced by PanAsia CVS (HK) Limited.

Two procedural consequences follow. Commerce will direct U.S. Customs and Border Protection to suspend liquidation on unliquidated entries of CGI brake drums from China entered, or withdrawn from warehouse, for consumption on or after January 27, 2026, and CBP will collect cash deposits at the underlying order rates: the AD rate for the China-wide entity of 150.25% and the CVD rate for all others of 11.94%, with company-specific rates applying where a respondent holds one.

This is a preliminary finding. Case briefs are due within 14 days of publication and rebuttal briefs within seven days after that; a hearing may be requested within 30 days. Commerce will notify the U.S. International Trade Commission under section 781(e), and the ITC has up to 60 days after notification to give written advice if it sees a significant injury issue. A final determination is still ahead.

Why a Material Swap Is the Whole Case

The original orders are written around gray cast iron. CGI is a different material: the graphite in compacted graphite iron is vermicular rather than flake-shaped, which raises tensile strength and stiffness and improves fatigue behaviour at close to the same density as gray iron. That is why the substitution was attempted – a stronger, stiffer iron lets a designer thin the section, hold stiffness, and cut mass on an unsprung vehicle component.

Commerce’s finding is procedural rather than technical: a change in the material specification did not take the product out of the order, because the product remains a brake drum of the covered dimensions and function. The statutory question is about later development, not about which iron grade performs better.

What Changes on the Shop Floor

For a shop that machines, bores or balances brake drums, CGI changes real process inputs even though the part envelope is unchanged:

• Turning and boring forces run higher. CGI’s higher strength and stiffness and its abrasive, compacted graphite structure typically increase cutting forces and tool wear relative to flake-graphite gray iron. Where that matters, shops normally move to more wear-resistant insert grades and coatings and revisit feed and speed, rather than assuming gray-iron parameters carry over. The correct values are material-, insert- and machine-specific and should be established on the actual work, not copied from a general table.
• Chip formation and finish differ. Compacted graphite produces shorter, more segmented chips than flake gray iron, which changes chip evacuation and the risk of surface tearing on the bore and flange faces. Finish and roundness limits on friction and mounting surfaces must be re-qualified, not inherited.
• Inspection mix shifts. Because CGI relies on graphite morphology for its properties, incoming verification is metallurgical – graphite form, nodularity and matrix – not only a hardness number. Accepting a certificate without confirming the grade risks machining to print with out-of-spec material.
• Mass and balance targets move. A thinner CGI drum holds stiffness at lower mass, which shifts the balance and runout windows and can change fixturing for hub boring and flange facing.

What Buyers Should Verify Now

• Re-check scope by material and dimensions, not by name. A drum that is CGI rather than gray iron, but still falls inside the 14.75 to 16.6 inch inside-diameter band and the over-50-pound threshold, is subject to this preliminary finding. Confirm the grade on the certificate and the measured dimensions.
• Trace origin through every manufacturing step. The finding attaches to drums produced in China and exported to the United States. Establish where the casting is poured and where it is finish-machined, and keep both with the material documentation. A structured RFQ validation checklist is a reasonable place to record that evidence as a line item.
• Re-price entries already in motion. Suspension of liquidation reaches entries on or after January 27, 2026. Any order placed, shipped or warehoused since that date may carry exposure that was not in the original quote – a documentation and cut-off exercise rather than a market-timing one.
• Qualify a documented alternative source. Where a program depends on cast-iron drums, a supplier qualification record should capture origin and material grade so re-sourcing does not restart from zero.
• Read this against the broader trade-remedy pattern. The same week, Commerce also set final solar-cell AD/CVD duties on India, Indonesia and Laos and final steel rebar duties on Vietnam, Egypt and Bulgaria. Origin and material-substitution questions are being tested across several component categories at once.

Limited Conclusions

What is established and dated: on September 22, 2026, Commerce published a preliminary affirmative country-wide determination (Doc 2026-19372, 91 FR 60082; A-570-174 and C-570-175) that CGI brake drums from China circumvent the AD and CVD orders on certain brake drums from China (90 FR 38730 and 90 FR 38753, August 12, 2025). Liquidation is suspended on entries from January 27, 2026, and the ITC consultation and a final determination remain outstanding.

For precision manufacturing buyers and shops, the practical message is narrower than the headline rate. The product did not change shape; the iron did. A material substitution inside a covered component, finished somewhere along a multi-step supply chain, can still be treated as inside an existing order – so material grade, dimensional band and production origin need to be documented and read together, not treated as independent facts on separate certificates.

References

• Commerce, Enforcement & Compliance, ITA. Certain Brake Drums From the People’s Republic of China: Preliminary Affirmative Determination of Circumvention of the Antidumping Duty and Countervailing Duty Orders, Doc 2026-19372, 91 FR 60082, applicable September 22, 2026 (dated September 17, 2026). Retrieved September 23, 2026. federalregister.gov/documents/2026/09/22/2026-19372
• Underlying orders: Certain Brake Drums From the People’s Republic of China and the Republic of Türkiye: Antidumping Duty Orders, 90 FR 38730 (August 12, 2025), Doc 2025-15248; Countervailing Duty Orders, 90 FR 38753 (August 12, 2025), Doc 2025-15249. 2025-15248 | 2025-15249
• Initiation of the circumvention inquiry: 91 FR 3435 (January 27, 2026), Doc 2026-01598. federalregister.gov/documents/2026/01/27/2026-01598

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