ASTM F3616-25

1.1.1 Collates information from existing standardized and non-standardized techniques and explains how the selected test methods can be adopted for contamination detection.

1.1.2 Defines contamination types that may be present within metal powders used in Laser Beam Powder Bed Fusion (PBF-LB).

1.1.3 Outlines a standardized contamination classification system.

1.1.4 Increases awareness of qualitative techniques that might be utilized for contamination detection.

1.1.5 Provides an overview of techniques that could be used for contamination detection.

1.1.6 Identifies advantages and limitations of commonly used techniques for detection of contamination within metal powders.

1.1.7 Provides outputs of contamination detection using different techniques.

1.1.8 Provides recommendations on selection of techniques for contamination assessment.

1.2.1 Sampling

1.2.2 Sample size—The test sample size and analysis duration for each technique can be modified depending on user requirements.

1.2.3 Sample preparation

1.2.4 Number of tests and retests

1.2.5 Controlling moisture in powder feedstock used in additive manufacturing (AM).

1.2.6 Acceptance limits for contamination which might be present within metal powders used in AM. Therefore, the standard does not allow material qualification for PBF-LB.

1.2.7 The techniques outlined within the document do not enable quantitative analysis of a contamination.

1.2.8 This guide does not purport to address all techniques that can be used for contamination assessment. This guide does not cover standardized techniques, which were primary developed for other purposes (for example, Inductively Coupled Plasma Atomic Emission Spectroscopy, Inert Gas Fusion). However, it should be noted that other techniques might be adapted for contamination detection.