Sourcing Molybdenum Crucibles from China

Duty and waste controls

Read from the UK Trade Tariff on 20 October 2026, heading 8102 covers molybdenum and its articles, including waste and scrap. Finished molybdenum crucibles are candidates for 8102 99 00 00. The table distinguishes finished articles from manufacturing inputs; powder, sheet and unwrought material are not finished crucibles.

The supplied tariff lines all carry 0% duty for goods from China, with no listed anti-dumping or countervailing duty and no listed suspension. The other-articles and powder lines attach import and export waste controls. Waste shipment controls apply only where the material is waste. For discarded or contaminated crucibles from China, confirm the applicable requirements with your customs broker before shipment.

Confirm the material, manufacturing state and intended use using finding your commodity code. The wider furnace-parts context is covered in molybdenum furnace boats. Treat the worked order as illustrative, with FOB value and freight expressed in whole pounds.

Crucible material, geometry and furnace conditions

Specify pure molybdenum or the agreed alloy, chemistry, density, manufacturing route and surface finish. Supply a drawing showing internal and external diameters, height, wall and base thickness, rim shape, corner radii and lid fit. Identify whether the crucible is machined, formed or fabricated, and agree whether seams are acceptable.

Give the supplier the charge material, furnace atmosphere, operating temperature and heating cycle. Agree a sample trial in your process before accepting production. Ask for batch-linked material certificates and chemistry and density results. REACH registration applies to substances in articles only in certain limited cases; assess the actual product rather than applying powder guidance automatically.

Worked duty example

Illustrative example, not a quote: An illustrative batch of finished molybdenum crucibles for a laboratory furnace under 8102 99 00 00, invoiced at £30,000 free on board, with £800 of freight and insurance to the UK. The customs value is £30,800. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £30,800, so it is £6,160. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Material: match batch identification to the certificate and check chemistry and density against the order.

Geometry: measure the opening, height, wall and base thickness, rim and lid fit against the approved drawing.

Condition: inspect the interior, base and rim for cracks, porosity, machining damage, oxidation and residue; inspect any agreed seams.

Packing: check individual support, protection against contact damage and moisture, and batch identification during quality inspection.

What goes wrong

A crucible can match the outside dimensions while having an undersized cavity or thin base. Low density, cracks and unsuitable chemistry can undermine furnace performance. A certificate without a matching batch identity does not establish which material was delivered.

Packing that allows crucibles to strike each other can damage rims. Moisture and poor protection can leave oxidised surfaces. Record defects before use, retain the packaging and compare the delivery with the approved sample, drawing and batch records.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For repeat volumes, see container programmes.