EN 4500-004:2026

• Abstract:

  The EN 4500 series specifies the rules for the drafting and presentation of metallic material standards for aerospace applications.; This Part 004 specifies the "Specific rules for titanium and titanium alloys".

• Status: Not Published
• Publication Date: 06-Oct-2026
• ICS: 01.120 - Standardization. General rules
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 4/S 3 - Steels & Heat Resisting Alloys
• Current Stage: 6055 - CEN Ratification completed (DOR) - Publishing
• Start Date: 26-Jul-2026
• Completion Date: 26-Jul-2026
• Ref Project: kSIST FprEN 4500-004:2026 - Aerospace series - Metallic materials - Rules for drafting and presentation of material standards - Part 004: Specific rules for titanium and titanium alloys

• Revises: EN 4500-004:2024 - Aerospace series - Metallic materials - Rules for drafting and presentation of material standards - Part 004: Specific rules for titanium and titanium alloys
• Effective Date: 11-Jun-2025

EN 4500-004:2026 is a CEN aerospace standard that sets the specific rules for drafting and presenting material standards for titanium and titanium alloys. It is aimed at the people who write, revise, or interpret aerospace metallic material standards, so the resulting product standards use a common structure and vocabulary. In practice, it tells you how to present the material designation, form, melting route, condition, tests, and qualification information in a standard.

What does EN 4500-004:2026 specify?

EN 4500-004:2026 belongs to the EN 4500 series, which specifies the rules for drafting and presenting metallic material standards for aerospace applications. This part focuses on titanium and titanium alloys, so it is a drafting rulebook rather than a product specification for one particular alloy.

The document is organized into four main clauses plus a bibliography, with informative annexes that show how to complete each part of the template. The annexes are practical examples for standard writers.

Annex	What it covers
A	Completion of the title page
B	Completion of the introduction
C	Completion of the scope, normative references, terms and definitions, and requirements
D	Completion of Table 1
E	Completion of the bibliography

What are the key requirements of EN 4500-004:2026?

EN 4500-004:2026 gives the wording and structure to use when drafting titanium and titanium alloy material standards for aerospace. Its main job is to keep titles, scopes, tables, and references consistent across the series.

Title and naming rules

Clause 4.2 sets the title structure. For titanium and titanium alloys, the standard tells drafters how to state the method of melting, the form, and any additional information entries.

This matters because the title is often the first thing buyers, engineers, and auditors read. A standard drafted under these rules should tell them quickly what product form and processing route the standard covers.

Clause 4.2.2 lists the allowed melting expressions, including non consumable electrode vacuum melted, consumable electrode vacuum arc melted, consumable electrode vacuum arc remelted, multiple melted, plasma cold hearth melted (P.C.H.M.), and electron-beam melted. For forging stock and forgings, only the required grade is indicated in accordance with EN 4800-001.

Form, processing, and use entries

Clause 4.2.3 gives the permitted form terms for sheets, strips, plates, bars, sections, tubes, wires, forging stock, forgings, remelting stock, castings, and rings. Clause 4.2.4 adds the permitted additional information entries, such as structural applications, pressure applications, superplastic forming, machining, forged fasteners, machined fasteners, and welding.

In practice, this controls how a material standard describes the product family and its intended use. That helps avoid ambiguous titles and makes product standards easier to compare.

Table 1 structure and required wording

Clause 4.5 is the core of the document. It sets the line-by-line structure of Table 1, including material designation, chemical composition, method of melting, form, method of production, further intended processing, limit dimensions, technical specification, dimensional standard, delivery condition and heat treatment, test sample and test piece information, direction of test piece, test requirements, inspection lines, notes, typical use, and product qualification.

Clause 4.5.2 requires chemical composition to be written in a defined order. Clause 4.5.10 lists the permitted delivery condition and heat treatment terms, such as not heat treated, annealed, solution treated, quenched, aged, cold worked, hot isostatically pressed (hipped), descaled, machined, ground, pickled, and stress relieved.

This matters because the same material can be specified in several different processed states. The standard makes the state explicit so the supplier and the purchaser are describing the same product.

Clause 4.5.17 states that line 10, thickness of cladding on each face, is not applicable to titanium and titanium alloys. Clause 4.5.27 says line 27 is not used, and clause 4.5.30 says line 97 is not used. Clause 4.5.28 to 4.5.33 cover marking inspection, dimensional inspection, notes, typical use, and product qualification.

Normative use of Table 1 and related documents

Annex C states that the requirements of Table 1 shall be applied and that the documents listed in Table 1 shall be applied. Clause 4.5.27 says the relevant lines from 30 to 94 are completed in accordance with EN 4500-001.

In practice, this means the table is not just a layout aid. It is the normative framework for the material standard, and each referenced line or document contributes to the final specification.

Use of examples and annex templates

Clause 4.1 explains that the examples in the annexes are only illustrations of the drafting rules and may not correspond to real standardized EN semi-finished products. That keeps writers from treating the examples as fixed product definitions.

This matters because the document is a drafting standard. Its examples show how to write a standard correctly, not which titanium products must exist.

What terms does EN 4500-004:2026 define?

EN 4500-004:2026 applies the terms and definitions of EN 4259 and EN 4500-001. It also uses a number of key expressions that are central to drafting titanium material standards.

• P.C.H.M. - plasma cold hearth melted, one of the permitted melting-route terms in the title and Table 1.
• hipped - hot isostatically pressed, used as a delivery condition or processing term.
• Reference heat treatment - the heat treatment taken as the stated reference condition for properties in Table 1.
• Delivery condition - the condition in which the product is supplied, such as annealed, solution treated, or cold worked.
• Product qualification - the qualification programme and related requirements for confirming a product standard.
• C.S.R. - contractile strain ratio, a batch test shown in Annex D.
• TU2 - the other common industry designation given in Annex C for Titanium alloy Ti-2.5Cu.

Who uses EN 4500-004:2026?

EN 4500-004:2026 is used by standards writers, technical committees, and aerospace material specialists who draft titanium and titanium alloy product standards. It also matters to manufacturers, laboratories, quality teams, and buyers who need to interpret those standards consistently.

In practice, it supports the people who decide how a titanium material standard should be structured, how product forms are named, and how test and qualification information is presented for aerospace applications.

What changed in EN 4500-004:2026 from the previous edition?

EN 4500-004:2026 supersedes EN 4500-004:2024. The stated changes are:

• addition of line 4.3, “Further intended processing”, and line 5.2, “Dimensional standard”, in the body of the document and in Annex D
• addition of introductory sentences to Table 1 in Annex C to show that the table is a normative element and that all listed documents shall be applied
• editorial changes to clarify which references to documents and annexes are normative or informative
• restructuring and simplification of the document to achieve a single continuous table

Which standards are used with EN 4500-004:2026?

Standard	What it contributes
EN 4259	General terms and definitions for aerospace metallic materials
EN 4500-001	General rules for drafting and presenting material standards
EN 4800-001	Titanium and titanium alloys technical specification used for product naming and related drafting points
EN 4258	General organization of standardization for aerospace metallic materials
EN 4500-002 to EN 4500-006	Related drafting-rule parts for other material families and filler metals
EN 4800-002 to EN 4800-006	Companion technical specification parts for titanium and titanium alloy product forms
EN ISO 643, EN ISO 4288, EN ISO 8492, EN ISO 8493, EN ISO 12737, ISO 7802, ISO 9649	Test and measurement methods referenced in the document examples

What does the EN 4500-004:2026 document contain?

The document contains a full drafting template for titanium and titanium alloy material standards, centered on Table 1 and its line-by-line completion. It also includes example completed pages in Annexes A and B, a worked example for the scope, references, terms, and requirements in Annex C, and a detailed example of Table 1 in Annex D.

Annex D shows how the table can combine chemical composition, heat treatment, test conditions, inspection items, microstructure and macrostructure checks, surface and internal quality checks, and product qualification entries. The bibliography then points to the companion EN and ISO documents used to write and interpret those sections.

SLOVENSKI STANDARD
oSIST prEN 4500-004:2025
01-oktober-2025
Aeronavtika - Kovinski materiali - Pravila za načrtovanje in predstavljanje
standardov za materiale - 004. del: Posebna pravila za titan in titanove zlitine
Aerospace series - Metallic materials - Rules for drafting and presentation of material
standards - Part 004: Specific rules for titanium and titanium alloys
Luft- und Raumfahrt - Metallische Werkstoffe - Regeln für das Erstellen und die
Gestaltung von Werkstoffnormen - Teil 004: Besondere Regeln für Titan und
Titanlegierungen
Série aérospatiale - Matériaux métalliques - Règles pour la rédaction et la présentation
des normes matériaux - Partie 004 : Règles spécifiques au titane et aux alliages de
titane
Ta slovenski standard je istoveten z: prEN 4500-004
ICS:
01.120 Standardizacija. Splošna Standardization. General
pravila rules
49.025.30 Titan Titanium
oSIST prEN 4500-004:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 4500-004:2025
oSIST prEN 4500-004:2025
DRAFT
EUROPEAN STANDARD
prEN 4500-004
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2025
ICS 01.120 Will supersede EN 4500-004:2024
English Version
Aerospace series - Metallic materials - Rules for drafting
and presentation of material standards - Part 004: Specific
rules for titanium and titanium alloys
Série aérospatiale - Matériaux métalliques - Règles Luft- und Raumfahrt - Metallische Werkstoffe - Regeln
pour la rédaction et la présentation des normes für das Erstellen und die Gestaltung von
matériaux - Partie 004 : Règles spécifiques au titane et Werkstoffnormen - Teil 004: Besondere Regeln für
aux alliages de titane Titan und Titanlegierungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

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. prEN 4500-004:2025 E
worldwide for CEN national Members.

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prEN 4500-004:2025 (E)
Contents Page
Foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Rules for drafting a European standard for aerospace metallic materials. 6
4.1 General. 6
4.2 Title . 6
4.2.1 General. 6
4.2.2 Method of melting . 6
4.2.3 Form entries . 7
4.2.4 Additional information entries . 8
4.3 Introduction . 8
4.4 Scope, normative references, terms and definitions, requirements . 8
4.5 Table 1 . 9
4.5.1 Line 1: Material designation . 9
4.5.2 Line 2: Chemical composition. 9
4.5.3 Line 3: Method of melting . 9
4.5.4 Line 4.1: Form . 9
4.5.5 Line 4.2: Method of production . 9
4.5.6 Line 4.3: Further intended processing . 9
4.5.7 Line 4.4: Limit dimension(s) . 9
4.5.8 Line 5.1: Technical specification . 9
4.5.9 Line 5.2: Dimensional standard . 10
4.5.10 Line 6.1: Delivery condition and Heat treatment . 10
4.5.11 Line 6.2: Delivery condition code . 10
4.5.12 Line 7: Use condition and Heat treatment . 10
4.5.13 Line 8.1: Test sample(s) . 10
4.5.14 Line 8.2: Test piece(s) . 10
4.5.15 Line 8.3: Heat treatment . 11
4.5.16 Line 9: Dimensions concerned . 11
4.5.17 Line 10: Thickness of cladding on each face . 11
4.5.18 Line 11: Direction of test piece . 11
4.5.19 Lines 12 to 16: Tensile (T) . 11
4.5.20 Line 17: Hardness . 11
4.5.21 Line 18: Shear strength . 11
4.5.22 Line 19: Bending . 11
4.5.23 Line 20: Impact strength . 11
4.5.24 Lines 21 to 26: Creep (C) . 11
4.5.25 Line 27 . 11
4.5.26 Line 29: Reference heat treatment . 12
4.5.27 Lines 30 to 94 . 12
4.5.28 Line 95: Marking inspection . 12
4.5.29 Line 96: Dimensional inspection . 12
4.5.30 Line 97 . 12
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4.5.31 Line 98: Notes . 12
4.5.32 Line 99: Typical use . 12
4.5.33 Line 100: Product qualification . 12
4.6 Bibliography . 12
Annex A (informative) Completion of title page . 13
Annex B (informative) Completion of the introduction . 14
Annex C (informative) Completion of the scope, normative references, terms and
definitions, and requirements . 15
Annex D (informative) Completion of Table 1 . 16
Annex E (informative) Completion of the bibliography. 22
Bibliography . 23
oSIST prEN 4500-004:2025
prEN 4500-004:2025 (E)
Foreword
This document (prEN 4500-004:2025) has been by the Technical Committee ASD-STAN/D04
“Material”.
This document is currently submitted to the CEN Enquiry
This document will supersede EN 4500-004:2024.
prEN 4500-004:2025 includes the following significant technical changes with respect to
EN 4500-004:2024:
— addition of the lines 4.3 "Further intended processing" and 5.2 "Dimensional standard" in the body
of the document and in Annex D;
— addition of introductory sentences to Table 1 in Annex C to highlight the fact that the table is a
normative element and that all the documents that it lists shall be applied;
— overall editorial modifications to give clarity on the normative or informative nature of the
references made to other documents or Annexes;
— restructuring of the document and simplification of the Template to achieve a single continuous
table.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
oSIST prEN 4500-004:2025
prEN 4500-004:2025 (E)
Introduction
This document is part of the series of EN metallic material standards for aerospace applications. The
general organization of this series is described in EN 4258.
The EN 4500 series (Aerospace series — Metallic materials — Rules for drafting and presentation of
material standards) is composed by the following documents:
— General rules EN 4500-001;
— Specific rules for aluminium, aluminium alloys and EN 4500-002;
magnesium alloys
— Specific rules for heat-resisting alloys EN 4500-003;
— Specific rules for titanium and titanium alloys EN 4500-004;
— Specific rules for steels EN 4500-005;
— Specific rules for filler metals for welding EN 4500-002 to EN 4500-005;
— Specific rules for filler metals for brazing EN 4500-006.
Basis for the drafting of all European standards is CEN/CENELEC Internal Regulations — Part 3:
Principles and rules for the structure and drafting of CEN and CENELEC documents.
oSIST prEN 4500-004:2025
prEN 4500-004:2025 (E)
1 Scope
The EN 4500 series specifies the rules for the drafting and presentation of metallic material standards
for aerospace applications.
This Part 004 specifies the “Specific rules for titanium and titanium alloys”.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 4259, Aerospace series — Metallic materials — Definition of general terms
EN 4500-001, Aerospace series — Metallic materials — Rules for drafting and presentation of material
standards — Part 001: General rules
EN 4800-001, Aerospace series — Titanium and titanium alloys — Technical specification — Part 001:
Plates, sheets and strips
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 4259 and EN 4500-001 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/
4 Rules for drafting a European standard for aerospace metallic materials
4.1 General
Examples given in Annexes are only intended to illustrate the rules for drafting and presentation and
might not correspond to real standardized EN semi-finished products. Technological development can
require the use of terms additional to those listed.
4.2 Title
4.2.1 General
Shall be according to EN 4500-001.
See also Annex A of this document.
The following are examples of descriptions which shall be used.
4.2.2 Method of melting
For forging stock and forgings, only the required grade shall be indicated in accordance with
EN 4800-001.
For other forms, use one or more of the following terms:
— non consumable electrode vacuum melted;
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prEN 4500-004:2025 (E)
— consumable electrode vacuum arc melted;
— consumable electrode vacuum arc remelted;
— multiple melted;
— plasma cold hearth melted (P.C.H.M.);
— electron-beam melted.
4.2.3 Form entries
a) Sheets, strips, plates:
The terms may be qualified with one of the following terms:
1) cold rolled;
2) hot rolled;
b) Bars:
The term may be qualified with one or more of the following terms:
1) rolled;
2) extruded;
3) forged;
c) Sections:
The term may be qualified with the following term:
1) extruded;
d) Tubes:
The term may be qualified with one or more of the following terms:
1) rolled;
2) drawn;
3) extruded;
4) seamless;
5) welded;
e) Wires:
The term may be qualified with one or more of the following terms:
1) extruded;
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2) rolled;
3) drawn;
f) Forging stock;
g) Forgings;
h) Remelting stock;
i) Castings:
The term may be qualified with one or more of the following terms:
1) investment;
2) rammed graphite mould;
3) hot isostatically pressed (hipped);
j) Rings:
The term may be qualified with one or more of the following terms:
1) rolled;
2) forged;
3) welded.
4.2.4 Additional information entries
— For structural applications;
— For pressure applications;
— For superplastic forming;
— For machining;
— For forged fasteners;
— For machined fasteners;
— For welding.
4.3 Introduction
Shall be according to EN 4500-001.
See also Annex B of this document.
4.4 Scope, normative references, terms and definitions, requirements
Shall be according to EN 4500-001.
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See also Annex C of this document.
4.5 Table 1
4.5.1 Line 1: Material designation
Shall be according to EN 4500-001.
See also Annex D of this document.
4.5.2 Line 2: Chemical composition
The chemical composition shall be written in accordance with EN 4500-001 and the order of
presentation of elements shall conform to the following rules:
— alloy elements in decreasing maximum content order;
— gas elements in decreasing maximum content order;
— trace elements in decreasing maximum content order;
— ratio and/or total elements;
— other elements: each and total.
4.5.3 Line 3: Meth
...