Australia ADC Anti-Dumping Notice 2026/031: Preliminary Affirmative Determination on Strata Steel Bolts from China

Mechanism

The Australian Anti-Dumping Commission (ADC) administers trade-remedy investigations under Part XVB of the Customs Act 1901 (Cth). Case 659 was initiated on application by DSI Underground Australia Pty Ltd, the domestic producer of strata reinforcing steel bolts used in underground mining and tunnelling operations.

Product scope (HS 7318 / 7326 family): Hollow, flat-rolled steel bolts, whether or not metallic coated (e.g. galvanised) and whether or not alloyed, with:

• Outside diameter: 44–48 mm
• Length: 2.2–2.5 m
• Base metal thickness: 2.8–3.4 mm

These bolts are primary consumables for roof-and-rib ground-support systems in underground hard-rock and coal mines. Australia's major mining operators (BHP Olympic Dam, Rio Tinto Pilbara and Hunter Valley operations, Glencore Cobar, Newmont Tanami) consume significant quantities in ongoing mine-development and production cycles.

First PAD (December 2025): The Commissioner made an initial PAD on 23 December 2025 under s.269TD(1), determining sufficient grounds existed for a dumping duty notice on Chinese imports. At that point no grounds for a countervailing duty notice were identified.

ADN 2026/031 (March 2026): The second PAD revises the security rates for interim dumping duty and, crucially, adds a new countervailing duty component — the Commissioner became satisfied there were sufficient grounds for a CVD notice as well. This dual AD+CVD provisional architecture is the operative chokepoint: importers must lodge securities (cash deposits or bank guarantees) for both duties pending final determination.

SEF 659 was published concurrently (6 March 2026), giving affected exporters and importers a three-week response window (deadline 26 March 2026). The Commissioner is required to report to the Minister by 16 April 2026.

Downstream implications

• Australian mining cost arithmetic: Strata bolts are direct consumables; AD+CVD

provisional duties on Chinese imports shift procurement toward domestic DSI Underground or alternative suppliers (South Korea, Germany), adding cost pressure to mine development capex for BHP, Rio Tinto, Glencore, and Newmont Australian operations.

• China steel-sector pattern continuity: ADN 2026/031 is part of a sustained ADC

enforcement wave against Chinese steel-product exports across structural sections, aluminium extrusions, hollow structural sections, and now mining consumables. Confirms AU-CN trade-remedy tension in manufactured steel products continues into 2026.

• Dual AD+CVD architecture: The extension to countervailing duties signals that

the ADC found evidence of Chinese government subsidisation of strata bolt production, not just price undercutting — a qualitatively distinct finding that may support higher final duties at the determination stage.

• Register gap closure: This is the second AU filing in 2026 (alongside

2026-05-19-australia-firb-foreign-investment-framework-reform) and the first AU 2026 ADC trade-remedy filing — closes the AU=0 2026 trade-remedy gap.

Open questions

• Final determination (due 16 April 2026): What dumping + subsidy margins are confirmed,

and do final duty rates materially exceed the provisional security rates?

• Will any Chinese exporters receive individual (de minimis or zero) margins, reducing

the scope of the final duty notice?

• CVD countervailing duty: Which Chinese government programmes are identified as the

subsidy basis?