U.S. Finds Critical Circumstances on Chinese Graphite Electrodes – What the 103.49% Preliminary Rate Means for EDM and Mold Buyers

Fact check date: September 26, 2026. Event date: September 24, 2026. Case: C-570-221.

On September 24, 2026, the U.S. Department of Commerce’s International Trade Administration (ITA) published a preliminary affirmative critical circumstances determination in the countervailing duty (CVD) investigation of large diameter graphite electrodes from China. In plain terms, Commerce found reason to believe that imports of these electrodes surged and that they benefited from subsidies inconsistent with the WTO Subsidy Agreement. The finding triggers retroactive suspension of liquidation, which is the part that changes real procurement math for anyone buying EDM electrodes.

This matters to precision manufacturing because large diameter graphite electrodes are not a niche curiosity. They are a primary consumable in sinker (ram) EDM, the process shops use to burn cavities into hardened tool steel, titanium, and complex mold geometries that are expensive or impossible to mill. When duty exposure on electrodes moves, it moves on mold making, tooling lead time, and the cost of hard-metal features.

What Commerce Actually Determined

According to the notice (document 2026-19518, published at 91 FR 60593), Commerce preliminarily determined that critical circumstances exist for all producers and exporters of large diameter graphite electrodes from China.

• Period of investigation: January 1, 2025 through December 31, 2025.
• Petitioners: the Large Diameter Graphite Electrodes Fair Trade Coalition, whose members are Resonac Graphite America Inc. and Tokai Carbon GE LLC.
• Massive imports test: Commerce compared monthly shipment data for base period October 2025 to February 2026 against comparison period March 2026 to July 2026. Import quantity under HTSUS 8545.11.0020 during the comparison period exceeded the base period by more than 15 percent, the regulatory threshold for “massive.”
• Subsidy programs cited: export loans from Chinese state-owned banks, export seller’s and buyer’s credit, grants tied to brands and trade development, among others.

Because the two mandatory respondents — Dantan New Materials Co., Ltd. and Shanxi Juxian Graphite New Material Co., Ltd. — did not cooperate, Commerce applied facts available with adverse inferences (AFA) to them and the Government of China. No verification was conducted, and Commerce stated there were no calculations to disclose because the applied rates are based on prior proceedings.

Why This Is More Than a Headline About Electrodes

The critical-circumstances finding is a procedural escalation, not an isolated event. It sits on top of the July 30, 2026 preliminary affirmative CVD determination (document 2026-15397, 91 FR 48076), which set estimated countervailable subsidy rates at 103.49 percent ad valorem for both mandatory respondents and for all others.

The operational consequence is the retroactive date. Under the critical circumstances finding, Commerce intends to direct U.S. Customs and Border Protection (CBP) to suspend liquidation of unliquidated entries entered or withdrawn from warehouse on or after May 1, 2026 — 90 days before the preliminary determination published on July 30, 2026. Those entries will require a cash deposit at the preliminary rate.

That 90-day lookback is the point most buyers miss. Importers who booked electrode orders in May, June, and July 2026 assumed one landed cost. The preliminary determination, reinforced by the critical circumstances finding, can retroactively change the duty treatment of entries already in the country.

Impact on Machining Shops, Mold Makers and Their Customers

Electrode cost is a smaller share of a part’s price than tooling or machine time, but it is a controllable and repeatable input. Three effects are worth planning for:

• Electrode blank pricing and availability. A 103.49 percent preliminary subsidy rate is high enough that importers of Chinese large diameter electrodes may pause orders, reroute sourcing, or pass costs through. That can tighten supply or shift quotes for the graphite you consume in sinker EDM, particularly for larger electrode formats used on deep cavities.
• Landed cost on in-transit and warehoused stock. The retroactive suspension date means duty exposure can move after the fact. Buyers who only track the invoice price will see the gap at entry summary, not at the quote.
• Downstream tooling and mold pricing. If electrode cost rises, EDM-heavy work such as hardened tool steel dies, deep ribs, and sharp internal corners sees margin pressure. That pressure is usually quoted into the next job, so it can appear as an unexplained increase months later.

Note the limits of this analysis: the determination is preliminary. Commerce will make its final critical circumstances finding in the final determination of the investigation, currently scheduled for December 7, 2026. Rates, scope, and effective dates can change, and nothing here is legal advice.

How This Interacts with Material and Process Choices

When electrode landed cost is unstable, the sensible response is often process substitution rather than simply absorbing the increase. Depending on the part, shops can evaluate:

• High-speed milling of hardened steel where geometry allows, using appropriate tooling and conservative parameters, instead of burning the feature with an electrode. Whether this works depends on material, hardness, geometry, drawing quality, and inspection requirements — not a universal rule.
• Wire EDM for through-features and profiles, which uses wire rather than large machined electrodes and is less exposed to the electrode duty change.
• Electrode design efficiency, including reducing electrode count per cavity through better splitting and orbiting strategy, which lowers total graphite consumption per part.

None of these should be applied as blanket policy. Each depends on material, thickness, geometry, drawing quality and inspection requirements. The right move is a DFM review of the specific part against current electrode economics.

Verification Actions for Buyers

Given that this is a preliminary action with a live comment period and a December final date, buyers should treat it as a moving target and verify rather than assume:

1. Confirm your entry dates. If you imported large diameter graphite electrodes from China on or after May 1, 2026, check entry summary treatment and the cash deposit rate applied, and confirm with your customs broker whether suspension of liquidation applies to your entries.
2. Read the primary notices, not summaries. The critical circumstances notice is document 2026-19518 (91 FR 60593) and the underlying preliminary CVD determination is document 2026-15397 (91 FR 48076), both on federalregister.gov.
3. Check scope carefully. Commerce modified scope language in the preliminary determination. Electrode type, diameter, and grade determine coverage, so compare your purchase specifications against the scope appendix before assuming you are in or out.
4. Re-onboard electrode suppliers. Ask current and alternate suppliers for production origin, HTSUS classification, and their exposure to the case. Sourcing from a non-subject origin changes the duty treatment.
5. Re-price EDM-heavy work. For jobs with significant sinker EDM content, revisit the electrode-cost assumption in your quote before the December 7 final determination, not after.

Preliminary trade actions change. The reliable practice is to date-stamp every assumption and re-check the primary source before you commit a quote or a purchase order.

Sources

• U.S. Department of Commerce, International Trade Administration. “Large Diameter Graphite Electrodes From the People’s Republic of China: Preliminary Affirmative Critical Circumstances Determination in Countervailing Duty Investigation.” Document 2026-19518, 91 FR 60593, published September 24, 2026, applicable September 24, 2026, dated September 18, 2026. federalregister.gov
• U.S. Department of Commerce, International Trade Administration. “Large Diameter Graphite Electrodes From the People’s Republic of China: Preliminary Affirmative Countervailing Duty Determination, and Alignment of Final Determination With Final Antidumping Duty Determination.” Document 2026-15397, 91 FR 48076, published July 30, 2026. federalregister.gov

This article summarizes publicly available regulatory notices as of September 26, 2026 and is provided for general information, not as legal, customs, or financial advice. Preliminary determinations are subject to change.

If you are planning parts with heavy sinker EDM content or need to reassess tooling economics, send us your drawing, material, quantity and key tolerances for a DFM and RFQ review: contact our engineering team. Related reading: DFM guidelines, tolerance selection, and surface finish guide.