Grade and assay
Define target WO₃ grade, acceptable penalties and the sampling or independent laboratory process required for acceptance.
Qualification starts with the material
Tungsten concentrate is commercially assessed using its WO₃ content, impurity profile, moisture, physical characteristics and the receiving buyer’s acceptance criteria. Specifications and terms must be agreed for each lot.
Lot size and continuity
Clarify spot requirements, monthly demand, preferred shipment size and whether recurring supply is needed. Availability is confirmed against the actual program.
Origin and records
Review origin information, counterparty records, applicable export documentation and evidence required by the buyer’s compliance process.
Logistics and terms
Align packaging, loading point, route, destination, delivery schedule and Incoterms before pricing and responsibilities are finalized.
A controlled transaction process
- Define: establish grade, volume, destination and acceptance criteria.
- Review: assess available assay information and supporting records.
- Agree: document inspection, pricing basis, delivery terms and responsibilities.
- Coordinate: manage agreed logistics and document checkpoints through delivery.
Buyer-led qualification
We do not treat an indicative grade or unverified availability as a shipment commitment. Commercial terms depend on the material, evidence, timing and agreed contract.
Read more: Tungsten supply risk and diversification.