SIST EN 2955:2025
(Main)Aerospace series - Recycling of titanium and titanium alloy scrap
Aerospace series - Recycling of titanium and titanium alloy scrap
This document specifies the general requirements for the recycling, by vacuum remelting or cold hearth
melting, of titanium and titanium alloy scrap used for the production of ingots.
Luft- und Raumfahrt - Wiederaufbereitung von Schrott aus Titan und Titanlegierungen
Dieses Dokument legt die allgemeinen Anforderungen für das Recycling von Schrott aus Titan und Titanlegierungen, der für die Herstellung von Gussblöcken verwendet wird, durch Vakuum-Umschmelzen oder Kaltherdschmelzen, fest.
Série aérospatiale - Recyclage des chutes de titane et d'alliages de titane
Le présent document spécifie les exigences générales relatives au recyclage, par refusion sous vide ou par fusion en sole froide, des chutes de titane et d'alliages de titane utilisées pour l’élaboration de lingots.
Aeronavtika - Recikliranje odpadnega titana in titanovih zlitin
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2025
Aeronavtika - Recikliranje odpadnega titana in titanovih zlitin
Aerospace series - Recycling of titanium and titanium alloy scrap
Luft- und Raumfahrt - Wiederaufbereitung von Schrott aus Titan und Titanlegierungen
Série aérospatiale - Recyclage des chutes de titane et d'alliages de titane
Ta slovenski standard je istoveten z: EN 2955:2025
ICS:
13.030.50 Recikliranje Recycling
49.025.30 Titan Titanium
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 2955
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 49.025.30 Supersedes EN 2955:1993
English Version
Aerospace series - Recycling of titanium and titanium alloy
scrap
Série aérospatiale - Recyclage des chutes de titane et Luft- und Raumfahrt - Wiederaufbereitung von Schrott
d'alliages de titane aus Titan und Titanlegierungen
This European Standard was approved by CEN on 25 November 2024.
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 2955:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Recycling . 5
4.1 General requirements . 5
4.2 Approval . 6
4.3 Procedure . 6
4.4 Technical requirements . 6
4.4.1 General. 6
4.4.2 Turnings . 7
Annex A (informative) Flowchart for scrap recycling . 15
Bibliography . 16
European foreword
This document (EN 2955:2025) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document shall be given the status of a national standard, either by publication of an identical text
or by endorsement, at the latest by August 2025, and conflicting national standards shall be withdrawn
at the latest by August 2025.
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.
This document supersedes EN 2955:1993.
The main changes with respect to the previous edition are as follows:
— EN 2955:1993-11:
o editorial improvements and global review of the document;
o modification of Table 1, line 6 “Scrap from used massive parts” and line 7 “Scrap from used
light parts”;
o modification of the scope by adding “cold hearth melting”;
o modification of subclause 4.4.1 by adding “except for exfoliated ends”;
o modification of subclause 4.4.2 by adding “cold hearth melting”.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this document: 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.
1 Scope
This document specifies the general requirements for the recycling, by vacuum remelting or cold hearth
melting, of titanium and titanium alloy scrap used for the production of ingots.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
scrap processor
processor that classifies the scrap and guarantees conformity to the melter's requirements acting in
accordance with the aerospace purchaser’s requirements
Note 1 to entry: Scrap processing may be carried out by an independent processor (scrap dealer), by the melter's
processing department or by the purchaser's processing department.
3.2
melter
company which manufactures titanium or titanium alloy ingots
3.3
purchaser
body which purchases the products from a manufacturer or a stockist in accordance with the
requirements of the user
Note 1 to entry: The purchaser can also be the user.
3.4
melter's recovery department
department responsible for recovering the scrap produced by the melter and preparing it for treatment
by the scrap processor
3.5
purchaser's recovery department
department responsible for recovering the scrap produced by the purchaser and preparing it for
treatment by the scrap processor
3.6
scrap lot
scrap from the same alloy and same classification prepared by the same processor in accordance with
the same process schedule and processed at the same time
3.7
classification of scrap
sorting of scrap in categories and sub-categories
Note 1 to entry: Scrap categories and sub-categories are specified in Table 1.
3.8
traceable scrap
individual pieces of scrap, the history of which can be traced back to the original ingot
3.9
massive scrap
scrap with an individual mass specified by the melter requiring 100 % check
3.10
light scrap
scrap with an individual mass specified by the melter for sampling
3.11
non-contaminated scrap
scrap which is free from contamination
EXAMPLE Contamination can, for instance, be caused by:
— brazing;
— electrolytic deposits;
— painting;
— coating;
— oxidation caused by heating;
— nitriding;
— machining: broken tools/blades/wheels.
4 Recycling
4.1 General requirements
For flowchart for scrap recycling, see Annex A, Figure A.1.
The scrap shall:
a) come from a source approved by the scrap processor, but only if any defects which led to the
rejection can be removed by remelting (without high density inclusions such as HDI or carbides);
b) be collected, segregated according to alloy type, classified in accordance with Table 1, put into
appropriate container and marked with an identification number according to a laid-down
procedure.
4.2 Approval
a) For each scrap category, the scrap processor shall demonstrate that his sorting process is capable of
yielding a product that meets the requirements of this document.
b) In order to demonstrate this capability, a verification programme shall be established in
conjunction with the melter, if appropriate, by the purchaser.
c) After satisfactory results, the scrap processor shall be approved for processing of the scrap
category concerned.
4.3 Procedure
a) Methods for inspection, cleaning, preparation, identification, maintenance of traceability and test
frequency shall be laid down in a written procedure for each scrap category.
b) The melter and the purchaser shall have access to all documents and installations of the scrap
processor in order to verify the application of the procedure.
c) Any proposed change to this procedure shall be submitted for approval to the melter and, if
appropriate, to the purchaser.
d) The scrap processor shall furnish a certificate of conformity to the requirements of the order for
each lot which shall include the following information:
1) scrap lot number;
2) alloy type;
3) scrap ca
...
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