ASTM International has published a new Standard Guide for the non-destructive testing (NDT) of metal parts produced by additive manufacturing (AM) methods. The guide numbered ASTM E3166, is the culmination of a 5-year effort in the Subcommittee E07.10 on Specialized NDE Methods. Jess Waller of NASA led a task group of more than 100 industry experts in the performance of round-robin studies of AM builds with non-destructive and destructive evaluations. The guide also features an extensive section describing the application of PCRT to metal AM parts. The results of the investigation and recommendations for NDT of AM parts are presented in the published Standard Guide, which is available online.