Tantalum powder, sheet and wire from China

Where to start: a documented tantalum production base

A concrete starting point is Ningxia Orient Tantalum Industry Co., Ltd. (宁夏东方钽业股份有限公司), whose registered address is on Yejin Road, Dawukou District, Shizuishan, Ningxia. Its Chinese listed-company profile identifies tantalum powder and tantalum wire among its products. Separately, Shizuishan’s government names the company’s high-purity tantalum powder experimental-line project in Shizuishan High-tech Industrial Development Zone.

These sources establish a named producer and production location; they do not establish that every trader using a Ningxia address manufactures tantalum. Ask the seller to identify which site makes the powder, melts the ingot and rolls or draws the finished material. Make those names part of the quotation and batch-document requirements. Use our factory versus trading company guide when the seller and manufacturing site differ.

Write separate specifications for powder and mill products

For plate, sheet and strip, ASTM B708-25 is the relevant product specification. Its scope distinguishes R05200 unalloyed tantalum made by electron-beam or vacuum-arc melting from R05400 unalloyed tantalum made by powder-metallurgy consolidation. State the required grade and edition explicitly; do not let the supplier substitute one route for the other without your approval.

ASTM B365 covers tantalum and tantalum-alloy rod and wire; ASTM B521 covers seamless and welded tantalum and tantalum-alloy tubes. Put the applicable specification alongside the drawing, dimensions, tolerances, condition and agreed test requirements. These are material specifications to incorporate into the purchase contract. Our product specification guide explains how to turn that brief into comparable quotations.

For capacitor-grade tantalum powder, request the supplier’s specific-charge (CV/g), leakage-current and particle-characterisation test reports, together with the pressing, sintering and formation conditions used. Agree your own acceptance conditions before ordering a qualification batch. Compare results produced under the same conditions rather than ranking powders by the headline CV/g alone.

Inspection must follow the application

Capacitor powder: specify batch oxygen results, packaging requirements and your electrical acceptance tests. Retain an identified sample from the approved batch and require written approval for changes to the powder grade or production process.

Sheet and wire: require a batch-linked certificate stating the specified grade and the actual chemistry and mechanical results required by the agreed standard. Check thickness or diameter, surface condition and identification against the order. For formed or welded parts, make a trial using the intended fabrication process before releasing the production order.

Chemical-process linings: give the engineer the acid composition, concentration, temperature and contact with other metals before selecting the grade. An incoming purity test cannot establish suitability for the operating environment. For titanium procurement, see our titanium products sourcing guide.

Keep the material certificate, retained sample and inspection report tied to the same batch identifier. Our quality planning guide for engineered parts helps define the acceptance record.

UK obligations: decide whether you are importing a substance or an article

For a Great Britain business importing tantalum as a substance, check UK REACH before the annual quantity reaches 1 tonne per substance per legal entity. HSE states that manufacture or import at or above that threshold requires registration. Establish whether your imports are covered by an appropriate registration or Only Representative arrangement; do not assume the Chinese supplier’s EU paperwork covers your GB obligations.

HSE distinguishes substances from articles, whose shape, surface or design determines their function. Assess sheet, wire and finished components against that distinction rather than treating every item under heading 8103 identically. HSE also explains that substances in articles may require registration where they are intended to be released during use.

UK REACH operates in England, Scotland and Wales; EU REACH continues to apply in Northern Ireland. Use our UK REACH guide to structure the importer’s review.

Before contracting, ask for the smelter identity and the mineral-origin due-diligence documents your customer requires. Make their acceptance a contractual condition rather than assuming that a supplier’s country of manufacture proves the ore’s origin. For cobalt procurement, see our cobalt metal and powders sourcing guide.

Cambridge China Bridge’s factory verification service is the relevant starting point for checking the named production site and agreeing which batch records must accompany the order.

UK duty and a worked import VAT calculation

The following entries were read from the UK Integrated Online Tariff on 3 October 2026. Each shows third-country duty of 0% and standard import VAT of 20%; no China anti-dumping duty is listed in the measures inspected. The table covers tantalum powder, mill products and crucibles, not a finished capacitor. Recheck the classification and measures for the actual goods and declaration date. For other specialist metals, see our gallium, germanium and minor metals guide. For antimony procurement, see our antimony ingot sourcing guide. For gold materials, see our gold powder, wire and sheet sourcing guide. For silver powder procurement, see our silver powder sourcing guide. For other silver forms, see our silver sheet and strip guide.

Hypothetical calculation, not a tantalum price or supplier quote: assume sheet under 8103991000 has an agreed customs value of £45,900, already including freight and insurance to the UK border. Assume a further £300 of delivery and clearance expenses to the first UK destination, not already included, and no other additions.

Duty = £45,900 × 0% = £0. Import VAT value = £45,900 + £300 + £0 = £46,200. Import VAT = £46,200 × 20% = £9,240. Duty plus import VAT is therefore £9,240. HMRC requires the VAT value to include relevant incidental expenses to the first UK destination and a further destination known at importation. See calculating UK import duty and VAT.