ASTM International reports that its additive manufacturing (AM) technologies committee (F42) is developing a proposed standard to help control the cleanliness of metal powder feedstock used in AM processes and thus ensure quality of final AM components.

The proposed standard will help AM users to perform cleanliness assessment of unused and re-used powders, the organization said.

According to ASTM International member Aneta Chrostek-Mroz, powder handling and processing practices used in AM, particularly during powder reuse, could lead to the deterioration of powder properties through the introduction of contamination. This can result in inclusions and defects in final components.

“The proposed standard will help manufacturers and users of metal powder feedstock used in additive manufacturing to identify suitable methods for detecting and quantifying different types of contamination,” said Chrostek-Mroz. “The guide will define and classify typical contamination that can be present within metal powder feedstock.”

Technical experts with experience in cleanliness assessment and/or have researched contamination of metal powder used in AM can get involved – for more information email Dan Bergels at

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