EN ISO/ASTM 52967:2025
(Main)Additive manufacturing for aerospace - General principles - Part classifications for additive manufactured parts used in aviation (ISO/ASTM 52967:2024)
General Information
- Abstract
1.1 This document is intended to be used to assign part classifications across the aviation industries that use AM to produce parts.
1.2 This document is applicable to all AM technologies defined in ISO/ASTM 52900 used in aviation.
1.3 This document is intended to be used to establish a metric for AM parts in downstream documents.
1.4 This document is not intended to establish criteria for any downstream processes, but rather to establish a metric that these processes can use.
1.5 The part classification metric could be utilized by the engineering, procurement, non-destructive inspection, testing, qualification, or certification processes used for AM aviation parts.
1.6 The classification scheme in this document establishes a consistent methodology to define and communicate the consequence of failure associated with AM aviation parts.
1.7 This document is not intended to supersede the requirements and definitions of the applicable regulations or policies, including but not limited to the ones listed in Annex A1.
1.8 Tables A.1.1-A.1.3 align the existing regulations and guidance with the four part classes established herein. However, this alignment should not be construed as an alignment of the existing regulations to each other.
1.9 The material or process, or both, in general does not affect the consequence of failure of a part, therefore the classification scheme defined in this document may be used outside AM.
1.10 The user of this document should not assume regulators’ endorsement of this document as accepted mean of compliance.
1.11 This document does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this document to establish appropriate safety, health, and environmental documents and determine the applicability of regulatory limitations prior to use.
1.12 This document was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
- Status
- Published
- Publication Date
- 25-Nov-2025
- Technical Committee
- CEN/TC 438 - Additive Manufacturing
- Drafting Committee
- CEN/TC 438 - Additive Manufacturing
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 26-Nov-2025
- Due Date
- 18-Aug-2027
- Completion Date
- 26-Nov-2025
Overview
EN ISO/ASTM 52967:2025 (ISO/ASTM 52967:2024) establishes a consistent part‑classification scheme for additive manufacturing (AM) parts used in aviation. Its primary purpose is to provide a common metric that downstream documents (material/process specifications, inspection, qualification, certification) can reference to communicate the consequence of failure for AM aviation parts. The standard applies to all AM technologies defined in ISO/ASTM 52900 and is intended for use across civil, military and spaceflight aviation sectors while not replacing existing regulatory requirements.
Key Topics
- Scope and applicability
- Assigns part classifications across aviation industries that use AM.
- Applicable to all AM technologies per ISO/ASTM 52900.
- Intended as a metric for downstream documents; it does not define specific acceptance criteria for those processes.
- Four‑class classification scheme
- Class A (High) - Failure can directly affect continued safe flight and landing; may cause serious or fatal injury or require exceptional piloting skill.
- Class B (Medium) - Failure can indirectly affect safe flight or result in significant increase in crew workload or minor injuries.
- Class C (Low) - Failure has no effect on continued safe flight/landing; may slightly reduce functionality or increase workload.
- Class D (Negligible) - Failure has negligible or no effect on operational capability; no risk to personnel or other equipment.
- Use as a risk metric
- Supports consistent communication of consequence of failure across engineering, procurement, NDI, testing, qualification and certification activities.
- Limitations & regulatory position
- Not intended to supersede regulatory definitions; users should not assume regulatory endorsement as an accepted means of compliance.
- Material or process generally does not alter the consequence‑of‑failure classification, so applicability may extend beyond AM.
Applications
- Design and systems engineering - categorize AM parts during design reviews and systems safety analyses.
- Procurement and supplier control - define procurement requirements and traceability needs based on part class.
- Inspection and qualification - inform the level of non‑destructive inspection, testing, and qualification called out in downstream standards.
- Certification and approval - provide a harmonized consequence‑of‑failure metric to support documentation submitted to regulatory bodies (FAA, EASA, military authorities), while recognizing regulators’ own requirements.
Related standards
- ISO/ASTM 52900 (AM fundamentals and vocabulary)
- FAA advisory circulars and regulations (referenced in Annex A)
- MIL‑STD and NASA, AWS, AMS standards cited for alignment and supporting guidance
Keywords: additive manufacturing aerospace, AM for aviation, part classification, ISO/ASTM 52967, aviation AM standards, AM qualification, safety‑critical AM parts.
Relations
- Effective Date
- 12-Feb-2026
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Frequently Asked Questions
EN ISO/ASTM 52967:2025 is a standard published by the European Committee for Standardization (CEN). Its full title is "Additive manufacturing for aerospace - General principles - Part classifications for additive manufactured parts used in aviation (ISO/ASTM 52967:2024)". This standard covers: 1.1 This document is intended to be used to assign part classifications across the aviation industries that use AM to produce parts. 1.2 This document is applicable to all AM technologies defined in ISO/ASTM 52900 used in aviation. 1.3 This document is intended to be used to establish a metric for AM parts in downstream documents. 1.4 This document is not intended to establish criteria for any downstream processes, but rather to establish a metric that these processes can use. 1.5 The part classification metric could be utilized by the engineering, procurement, non-destructive inspection, testing, qualification, or certification processes used for AM aviation parts. 1.6 The classification scheme in this document establishes a consistent methodology to define and communicate the consequence of failure associated with AM aviation parts. 1.7 This document is not intended to supersede the requirements and definitions of the applicable regulations or policies, including but not limited to the ones listed in Annex A1. 1.8 Tables A.1.1-A.1.3 align the existing regulations and guidance with the four part classes established herein. However, this alignment should not be construed as an alignment of the existing regulations to each other. 1.9 The material or process, or both, in general does not affect the consequence of failure of a part, therefore the classification scheme defined in this document may be used outside AM. 1.10 The user of this document should not assume regulators’ endorsement of this document as accepted mean of compliance. 1.11 This document does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this document to establish appropriate safety, health, and environmental documents and determine the applicability of regulatory limitations prior to use. 1.12 This document was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
1.1 This document is intended to be used to assign part classifications across the aviation industries that use AM to produce parts. 1.2 This document is applicable to all AM technologies defined in ISO/ASTM 52900 used in aviation. 1.3 This document is intended to be used to establish a metric for AM parts in downstream documents. 1.4 This document is not intended to establish criteria for any downstream processes, but rather to establish a metric that these processes can use. 1.5 The part classification metric could be utilized by the engineering, procurement, non-destructive inspection, testing, qualification, or certification processes used for AM aviation parts. 1.6 The classification scheme in this document establishes a consistent methodology to define and communicate the consequence of failure associated with AM aviation parts. 1.7 This document is not intended to supersede the requirements and definitions of the applicable regulations or policies, including but not limited to the ones listed in Annex A1. 1.8 Tables A.1.1-A.1.3 align the existing regulations and guidance with the four part classes established herein. However, this alignment should not be construed as an alignment of the existing regulations to each other. 1.9 The material or process, or both, in general does not affect the consequence of failure of a part, therefore the classification scheme defined in this document may be used outside AM. 1.10 The user of this document should not assume regulators’ endorsement of this document as accepted mean of compliance. 1.11 This document does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this document to establish appropriate safety, health, and environmental documents and determine the applicability of regulatory limitations prior to use. 1.12 This document was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
EN ISO/ASTM 52967:2025 is classified under the following ICS (International Classification for Standards) categories: 25.030 - Additive manufacturing; 49.035 - Components for aerospace construction. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO/ASTM 52967:2025 has the following relationships with other standards: It is inter standard links to ISO/ASTM 52967:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN ISO/ASTM 52967:2025 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2026
Dodajalna izdelava v letalski in vesoljski industriji - Splošna načela - Razvrstitev
izdelkov za letalsko industrijo, izdelanih z dodajalno izdelavo (ISO/ASTM
52967:2024)
Additive manufacturing for aerospace - General principles - Part classifications for
additive manufactured parts used in aviation (ISO/ASTM 52967:2024)
Additive Fertigung für Luftfahrt- und Raumfahrt - Allgemeine Grundsätze - Bauteil-
Klassifizierungen für additiv gefertigte Bauteile in Luft- und Raumfahrt (ISO/ASTM
52967:2024)
Fabrication additive pour l'aérospatiale - Principes généraux - Classification de pièces
pour les pièces produites par fabrication additive utilisées dans l'aviation (ISO/ASTM
52967:2024)
Ta slovenski standard je istoveten z: EN ISO/ASTM 52967:2025
ICS:
25.030 3D-tiskanje Additive manufacturing
49.035 Sestavni deli za letalsko in Components for aerospace
vesoljsko gradnjo construction
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO/ASTM 52967
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2025
EUROPÄISCHE NORM
ICS 49.035; 25.030
English Version
Additive manufacturing for aerospace - General principles
- Part classifications for additive manufactured parts used
in aviation (ISO/ASTM 52967:2024)
Fabrication additive pour l'aérospatiale - Principes Additive Fertigung für Luftfahrt- und Raumfahrt -
généraux - Classification de pièces pour les pièces Allgemeine Grundsätze - Bauteil-Klassifizierungen für
produites par fabrication additive utilisées dans additiv gefertigte Bauteile in Luft- und Raumfahrt
l'aviation (ISO/ASTM 52967:2024) (ISO/ASTM 52967:2024)
This European Standard was approved by CEN on 24 November 2025.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO/ASTM 52967:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO/ASTM 52967:2024 has been prepared by Technical Committee ISO/TC 261 "Additive
manufacturing” of the International Organization for Standardization (ISO) and has been taken over as
secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2026, and conflicting national standards shall be
withdrawn at the latest by May 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO/ASTM 52967:2024 has been approved by CEN as EN ISO/ASTM 52967:2025 without
any modification.
International
Standard
ISO/ASTM 52967
First edition
Additive manufacturing for
2024-10
aerospace — General principles
— Part classifications for additive
manufactured parts used in aviation
Fabrication additive pour l'aérospatiale — Principes généraux —
Classification de pièces pour les pièces produites par fabrication
additive utilisées dans l'aviation
Reference number
ISO/ASTM 52967:2024(en) © ISO/ASTM International 2024
ISO/ASTM 52967:2024(en)
© ISO/ASTM International 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
© ISO/ASTM International 2024 – All rights reserved
ii
ISO/ASTM 52967:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Referenced Documents . 2
3 Terminology . . 3
4 Part Classification Designations . 3
Annex A (Mandatory Information) . . 4
Bibliography .11
© ISO/ASTM International 2024 – All rights reserved
iii
ISO/ASTM 52967:2024(en)
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 document should be noted (see www.iso.org/directives).
ASTM International is one of the world’s largest voluntary standards development organizations with
global participation from affected stakeholders. ASTM technical committees follow rigorous process due to
balloting procedures.
ISO and ASTM International draw attention to the possibility that the implementation of this document
may involve the use of (a) patent(s). ISO and ASTM International take 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 and ASTM International 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 and
ASTM International 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
constitute an endorsement.
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 ASTM Committee F42, Additive manufacturing technologies (as
ASTM F3752-22) and drafted in accordance with its editorial rules. It was assigned to Technical Committee
ISO/TC 261, Additive manufacturing, and adopted under the “fast-track procedure”.
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 2024 – All rights reserved
iv
ISO/ASTM 52967:2024(en)
Introduction
The use of additive manufacturing (AM) technology allows designs that may not be achieved with
traditional manufacturing methods. It is important to understand the risk associated with the AM usage
by understanding the consequence of failure (including the loss of intended function) of the usage. Such
information can be beneficial in establishing consistent manufacturing, inspection, or qualification processes
relative to a defined risk scale, which can serve as supporting data when seeking regulatory approval of an
AM part. A part classification scheme based on a part’s consequence of failure can provide a consistent risk
metric. Without carefully defined part classes, the ability to accurately gauge the consequence of failure
associated with additively manufactured aviation parts within and across programs, projects, and suppliers
becomes exceedingly difficult, resulting in mitigations that are either not commensurate or inconsistent.
The part classification scheme documented here does not affect a part’s functional requirements, but rather
is used to group additive manufacturing aviation parts into categories which can be used in downstream
standards. For example, this classification scheme can be used in material and process specifications to
determine the appropriate levels of process control, thermal post processing, qualification, and inspection
to ensure AM parts meet their application requirements. This classification scheme does not specify how the
classification is used in any downstream processes. The use of the classification shall be left to the cognizant
engineering or production entities, or downstream documents which reference this standard.
© ISO/ASTM International 2024 – All rights reserved
v
International Standard ISO/ASTM 52967:2024(en)
Additive manufacturing for aerospace — General principles
— Part classifications for additive manufactured parts used in
aviation
1 Scope
1.1 This practice is intended to be used to assign part classifications across the aviation industries that
use AM to produce parts.
1.2 This practice is applicable to all AM technologies defined in ISO/ASTM 52900 used in aviation.
1.3 This practice is intended to be used to establish a metric for AM parts in downstream documents.
1.4 This practice is not intended to establish criteria for any downstream processes, but rather to establish
a metric that these processes can use.
1.5 The part classification metric could be utilized by the engineering, procurement, non-destructive
inspection, testing, qualification, or certification processes used for AM aviation parts.
1.6 The classification scheme in this practice establishes a consistent methodology to define and
communicate the consequence of failure associated with AM aviation parts.
1.7 This practice is not intended to supersede the requirements and definitions of the applicable
regulations or policies, including but not limited to the ones listed in Annex A1.
Tables A.1.1-A.1.3 align the existing regulations and guidance with the four part classes established herein.
However, this alignment should not be construed as an alignment of the existing regulations to each other.
1.9 The material or process, or both, in general does not affect the consequence of failure of a part,
therefore the classification scheme defined in this document may be used outside AM.
1.10 The user of this standard should not assume regulators’ endorsement of this standard as accepted
mean of compliance.
1.11 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety, health, and environmental practices
and determine the applicability of regulatory limitations prior to use.
1.12 This international standard was developed in accordance with internationally recognized principles on
standardization established in the Decision on Principles for the Development of International Standards, Guides
and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
© ISO/ASTM International 2024 – All rights reserved
ISO/ASTM 52967:2024(en)
2 Referenced Documents
1)
2.1 ISO/ASTM Standards:
52900 Additive Manufacturing – General principles – Fundamentals and vocabulary
2)
...