ASTM B964 Measures Flow Rate of Metal Powders Using Carney Funnel
October 1, 2009 // Published as a news service by IHS
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ASTM International published ASTM B964 - Test Methods for Flow Rate of Metal Powders Using the Carney Funnel.
Flow characteristics of fine metal powders are important in filling dies for pressing of powder metallurgy compacts, which are later sintered and sometimes machined into finished parts, according to ASTM.
The flow rate, as measured by ASTM B964, determines the flow necessary for a precise quantity of powder to be introduced into the die.
ASTM B964 was developed by Subcommittee B09.02 on Base Metal Powders, part of Committee B09 on Metal Powders and Metal Powder Products.
Frank Venskytis, a member of Committee B09, said ASTM B964 will serve as a complement to ASTM B213 - Test Method for Flow Rate of Metal Powders when ASTM B213 cannot be used due to fine powders not flowing through the small-orifice Hall funnel.
The Carney funnel has an orifice twice the diameter of the Hall.
According to Venskytis, for future revisions of ASTM B964, the subcommittee plans to develop a reference powder for calibration of the Carney flow apparatus.
ASTM B964 will be useful to those who work with refractory metal powders and fine ferrous materials.
Source: ASTM International.