ISO/ASTM FDIS 52959

FINAL DRAFT
International
Standard
ISO/ASTM
FDIS
ISO/TC 261
Additive manufacturing of metals —
Secretariat: DIN
Test artefacts — Compression
Voting begins on:
validation specimens for lattice
2025-11-26
designs
Voting terminates on:
2026-01-21
Fabrication additive de métaux — Pièces types d’essai —
Éprouvettes de validation de compression pour les conceptions de
treillis
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
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TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/ASTM
FDIS
ISO/TC 261
Additive manufacturing of
Secretariat: DIN
metals — Test artefacts —
Voting begins on:
Compression validation specimens
for lattice designs
Voting terminates on:
Fabrication additive de métaux — Pièces types d’essai —
Éprouvettes de validation de compression pour les conceptions de
treillis
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
© ISO/ASTM International 2025
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
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IN ADDITION TO THEIR EVALUATION AS
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
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Published in Switzerland Reference number
© ISO/ASTM International 2025 – All rights reserved
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Values . 1
5 Significance and use . 1
5.1 Significance . . .1
5.2 Use .2
6 Hazards . 2
7 Compression specimen design and manufacture . 2
8 Procedure . 3
8.1 Cleaning .3
8.2 Visual inspection .3
8.3 Specimen measurement .3
9 Specimen identification . 4
Bibliography . 5

© ISO/ASTM International 2025 – All rights reserved
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
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For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 261, Additive manufacturing, in cooperation
with ASTM Committee F42, Additive Manufacturing Technologies, on the basis of a partnership agreement
between ISO and ASTM International with the aim to create a common set of ISO/ASTM standards on
Additive Manufacturing, in collaboration with the European Committee for Standardization (CEN) Technical
Committee CEN/TC 438, Additive manufacturing, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

© ISO/ASTM International 2025 – All rights reserved
iv
Introduction
Validation and verification activities to support the manufacture of components are critical quality
requirements to ensure reliable production of consistent parts. Additive manufacturing (AM) offers the
opportunity to seamlessly incorporate computationally designed, high resolution, lattice structures into
components. On the other hand, AM systems can have different capabilities in terms of feature resolution,
therefore impacting physical properties of lattice structures. In order to ensure quality requirements, there
is a need to develop standardized lattice specimen geometries that can be used as surrogates in destructive
evaluations. Specifically, components incorporating lattice structures can be placed under compressive
loads. Since lattice designs, including, beam, gyroid or schwartz, can be unique to manufacturers, a
standardized approach is needed to ensure that the lattice design is adequately represented and can be
consistently assessed. This can allow for the evaluation of the compressive mechanical strength with
adequate representation of the manufacturing of the lattice design.
This document provides the lattice compression specimen and other AM specific considerations for using
the specimen per an existing compression test method like ASTM E9 or ISO 13314. Although ASTM E9 and
ISO 13314 provide standard methods of compression testing for metallic materials, in this document specific
considerations for lattice structures, such as the minimum number of unit cells, ductile and brittle material
considerations, the option for building specimens with en
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