ISO 4490:1978

Metallic powders — Determination of flowability by means of a calibrated funnel (Hall flowmeter)

The method is applicable only to powders which flow freely through the specified test orifice. It measures the time required for 50 g of a metallic powder to flow through the orifice of a calibrated funnel. Specifies apparatus, calibration of the funnel, sampling, procedure, expression of results and test report.