Density characterisation of metal powders in the laboratory

First of all, the density of a metal powder is relative to different parameters depending on whether it is packed or not, as what is determined is the density of the metal powder studied.

In fact, following the recommendations of the Ma-0015 standard, the different types of density that can be determined are

• The bulk density, determined by the funnel method, in accordance with ISO 3923-1 or ASTM B212
• Density after compaction, determined according to ISO 3953 or ASTM B527.
• True density, determined by helium pycnometry, in accordance with ISO 12154 or
  ASTM B923

The support of a laboratory competent in the determination of these parameters is therefore essential in the characterisation of the density of metal powders.