Kymera International, a speciality materials company headquartered in Raleigh, North Carolina, USA, has received a master Carney flowmeter in line with a new standard approved by the Metal Powder Producers Association (MPAA) Standards committee. The new standard has approved a new test method standard regarding the flow rate of non-free-flowing metal powders using a Carney flowmeter funnel.
Prior to this, no Carney funnels are said to have been calibrated for this flow metric, but, rather, tested the apparent density of the powders. The new calibration powder is a 316L stainless steel screen cut that was tested for stability and repeatability of flow time over an extended period.
Kymera now has 200 g quantities of this calibration powder available to purchase with which buyers can test their own Carney flowmeter funnels. A new funnel should have a flow time of 31.0 ±0.5 seconds for 150 g; funnels with a flow time of fewer than 28 seconds are invalid.
The MPAA Standards Committee intends to coordinate an inter-laboratory test programme in 2022 in conjunction with ASTM Committee B09 on Metal Powders and Metal Powder Products to determine the precision of the new Carney flow rate test method. A valid flowmeter funnel will be required for participation.