Overview
ISO/ASTM 52908:2023 - Additive manufacturing of metals - Finished part properties - Post-processing, inspection and testing of parts produced by powder bed fusion - specifies requirements for the qualification, quality assurance, post‑processing, inspection and testing of metallic parts produced by powder bed fusion (PBF). Intended for part providers and customers, the standard aligns testing and qualification methods with ISO/ASTM 52927 (categories H and M) to ensure repeatable finished‑part properties for industrial AM metal components.
Key topics and requirements
- Qualification and documentation
- Requirements for part validation, technical and facility documentation, and quality assurance records.
- Qualification records capture evidence that produced parts meet purchase specifications.
- Post‑processing
- Guidance on post‑build activities such as thermal treatment (stress relief, annealing/aging, densification), separation from build platforms and supports, and surface finishing.
- Considerations for reducing residual stresses and anisotropy, and preparing parts for mechanical machining.
- Inspection and testing
- Metallurgical testing (microstructure, chemical analysis, inclusion content) and specimen selection/preparation.
- Material testing: density measurement (Archimedean and image analysis), orientation effects, and specimen geometry/surface quality.
- Mechanical testing: static and dynamic test procedures referenced to established standards.
- Surface quality inspection, geometrical inspection (form, dimensions, tolerances), and non‑destructive testing (NDT).
- Conformance to purchase specifications
- Methods and acceptance criteria are to be defined at design stage, with inspection/testing performed per the purchase specification and relevant normative references.
Practical applications and users
- Who uses this standard
- Additive manufacturing service providers, OEMs, QA and materials engineers, procurement and regulatory teams, and customers specifying metallic PBF parts.
- Why it’s useful
- Standardizes post‑process workflows and acceptance criteria for PBF metal parts to reduce variability and support certification for industrial, aerospace, medical, and high‑reliability applications.
- Facilitates consistent reporting, supplier qualification, and supplier/customer communication around finished part properties and testing requirements.
Related standards
- ISO/ASTM 52927 (main characteristics and test methods)
- ISO/ASTM 52920 (qualification principles for AM processes and sites)
- ISO/ASTM 52900 (AM fundamentals and vocabulary)
- ISO/ASTM 52907, 52928 (powder characterization and powder life cycle)
- ISO 6892‑1, ASTM E8/E8M, ASTM B962, ASTM B311 (referenced mechanical and density test methods)
Keywords: ISO/ASTM 52908:2023, powder bed fusion, PBF, additive manufacturing, post‑processing, inspection, testing, qualification, quality assurance.