Powder chemistry, particle size distribution and flow behaviour together determine whether a part can be produced reliably.
| Check | What it tells you | What to request with the quote |
|---|---|---|
| Chemical composition | Alloy grade and impurity limits | Batch CoA, oxygen/nitrogen and relevant element limits |
| Particle size distribution | Distribution of the fine and coarse fractions | Cut, D10/D50/D90, measurement method |
| Flow time | Flow behaviour under defined test conditions | Method, unit and acceptance range |
| Apparent / tap density | Density of the powder bulk under different conditions | Request both values separately, with their methods |
| Morphology | Sphericity, satellites and agglomerates | Representative SEM image, sampling method |
| Part properties | Performance after printing and post-processing | Build orientation, heat treatment, test standard and specimen details |
Process selection
For LPBF, spreadability and a particle size cut suited to the machine; for DED, feed stability; for binder jetting and MIM, sintering behaviour and the requirements of the process system are considered together. Do not move a powder from one process to another just because the alloy name is the same.
Documentation package
Request the current technical datasheet, the batch certificate of analysis (CoA), the safety data sheet (SDS) and a traceable batch number. For handling and storage, follow the relevant SDS and your facility’s powder safety procedures.
Source: CNPC POWDER Company Catalog, printed pp. 3–23 and 29. Catalogue data is a reference for material selection; the datasheet, certificate of analysis of the delivered batch and application tests prevail.