EN 4700-005:2025

Aerospace series - Steel and heat-resisting alloys for wrought products - Technical specification - Part 005: Forging stocks

This document specifies the requirements for the ordering, manufacture, testing, inspection and delivery of steel and heat-resisting alloy forging stock. It is presupposed to be applied when referred to and in conjunction with the EN material standard unless otherwise specified on the drawing, order or inspection schedule.

Luft- und Raumfahrt - Stahl und Hochwarmfesten Legierungen - Umgeformte Erzeugnisse - Technische Lieferbedingungen - Teil 005: Schmiede Vormaterial

No Scope available

Série aérospatiale - Acier et alliages résistant à chaud pour les produits corroyés - Spécification technique - Partie 005 : Produits destinés à la forge

Le présent document spécifie les exigences relatives aux commandes, à la fabrication, aux essais, aux contrôles et à la livraison des produits destinés à la forge en acier et alliages résistant à chaud. Il est supposé être appliqué lorsqu'il est cité en référence et conjointement avec la norme de matériau EN sauf spécification contraire figurant sur le dessin, la commande ou la fiche d'essais.

Aeronavtika - Jeklo in zlitine, odporne proti vročini - Gneteni izdelki - Tehnična specifikacija - 005. del: Materiali za kovanje

General Information

• Status: Published
• Publication Date: 09-Dec-2025
• ICS: 49.025.10 - Steels
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 4/S 3 - Steels & Heat Resisting Alloys
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 10-Dec-2025
• Completion Date: 10-Dec-2025
• Ref Project: SIST EN 4700-005:2026 - Aerospace series - Steel and heat-resisting alloys - Wrought products - Technical specification - Part 005: Forging stocks

Relations

• Replaces: EN 4700-005:2010 - Aerospace series - Steel and heat resisting alloys - Wrought products - Technical specification - Part 005: Forging stock
• Effective Date: 30-Aug-2023

Overview

EN 4700-005:2025 - part of the CEN Aerospace series - is the European technical specification for forging stocks made from steel and heat-resisting alloys (wrought products). It specifies requirements for ordering, manufacture, testing, inspection and delivery of forging stock and is intended to be applied when referenced, in conjunction with the relevant EN material standard. The document was approved by CEN in 2025 and supersedes EN 4700-005:2010.

Key topics and technical requirements

This specification focuses on practical quality and compliance controls for aerospace forging stock. Key topics include:

• Scope and applicability - covers steel and heat-resisting alloy forging stock intended for aerospace use; to be used with the applicable EN material standard.
• Wording of order - clear purchaser/producer obligations: quantities, delivery dates, material standard number, delivery condition and metallurgical code, dimensions/tolerances, packing and any special tests.
• Health & safety - products must meet applicable local safety laws and be accompanied by a product safety data sheet.
• Manufacturing schedule & inspection - production in accordance with the relevant material standard and EN 2078 manufacturing/inspection schedules.
• Qualification requirements - qualification phases (typically first three batches from at least two casts unless agreed otherwise).
• Release testing and traceability - manufacturer responsibility for release tests; purchaser may witness tests; test samples must be representative; full traceability requirements.
• Retests, rework and rejection rules - defined retest procedures, acceptance criteria, options for 100% retest, re-heat treatment, or rejection when requirements are not met.
• Special tests and capability clause - purchaser-specified special tests; possibility to omit routine tests if sufficient statistical capability evidence exists (without relieving manufacturer responsibility).
• Referenced test methods - tensile, hardness, macro/micrographic examination, non-destructive testing and other EN/ISO/ASTM/AMS standards are cited as normative references.

Applications and who uses this standard

EN 4700-005:2025 is used by:

• Aerospace OEMs and Tier‑1 suppliers for specifying forging stock procurement.
• Steel and heat‑resisting alloy forging mills and material producers to establish production, testing and release procedures.
• Quality managers, procurement engineers, inspectors and certification bodies ensuring material conformity for aircraft parts.
• Design and metallurgical engineers referencing material delivery conditions for downstream forging and heat treatment.

Common use cases: procurement specifications for forgings, supplier qualification, manufacturing schedules, inspection and acceptance criteria for aerospace alloys, and audit/traceability documentation.

Related standards

Typical cross-references (not exhaustive):

• EN 4258 (series organization), EN 2078 (manufacturing/inspection schedules), EN 2002 series (tensile and test methods), EN 2950/2951 (micro/macro examination), EN 2032 (designation & metallurgical coding), and cited AMS/ASTM practices for macroetching and pyrometry. These linked standards provide the specific test methods and material definitions used with EN 4700-005:2025.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2026
Aeronavtika - Jeklo in zlitine, odporne proti vročini - Gneteni izdelki - Tehnična
specifikacija - 005. del: Materiali za kovanje
Aerospace series - Steel and heat-resisting alloys - Wrought products - Technical
specification - Part 005: Forging stocks
Luft- und Raumfahrt - Stahl und Hochwarmfesten Legierungen - Umgeformte
Erzeugnisse - Technische Lieferbedingungen - Teil 005: Schmiede Vormaterial
Série aérospatiale - Aciers et alliages résistant à chaud - Produits corroyés -
Spécification technique - Partie 005 : Produits destinés à la forge
Ta slovenski standard je istoveten z: EN 4700-005:2025
ICS:
49.025.10 Jekla Steels
77.140.85 Železni in jekleni kovani Iron and steel forgings
izdelki
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 4700-005
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2025
EUROPÄISCHE NORM
ICS 49.025.10 Supersedes EN 4700-005:2010
English Version
Aerospace series - Steel and heat-resisting alloys for
wrought products - Technical specification - Part 005:
Forging stocks
Série aérospatiale - Acier et alliages résistant à chaud Luft- und Raumfahrt - Stahl und Hochwarmfesten
pour les produits corroyés - Spécification technique - Legierungen - Umgeformte Erzeugnisse - Technische
Partie 005 : Produits destinés à la forge Lieferbedingungen - Teil 005: Schmiede Vormaterial
This European Standard was approved by CEN on 8 September 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 4700-005:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 7
4 Wording of order . 7
5 Health and safety . 7
6 Technical requirements . 8
6.1 General. 8
6.2 Qualification requirements . 8
6.3 Release requirements . 8
6.3.1 Release tests . 8
6.3.2 Retests . 8
6.3.3 Rejection . 9
6.3.4 Special tests . 9
6.3.5 Capability clause . 9
6.3.6 Statistical process control. 9
6.3.7 Inspection and test report . 9
6.4 Traceability . 10
7 Requirements . 10
Bibliography . 29

European foreword
This document (EN 4700-005:2025) 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 June 20026 and conflicting national standards shall be withdrawn at
the latest by June 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.
This document supersedes EN 4700-005:2010.
EN 4700-005:2010:
 update of Clause 2 “Normative references”;
 Table 1: addition of a note in line 17 and addition of ASTM E340 and ASTM E381 for steels in
line 51.
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.
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.
1 Scope
This document specifies the requirements for the ordering, manufacture, testing, inspection and
delivery of steel and heat-resisting alloy forging stock. It is presupposed to be applied when referred to
and in conjunction with the EN material standard unless otherwise specified on the drawing, order or
inspection schedule.
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 2002-001, Aerospace series — Metallic materials — Test methods — Part 001: Tensile testing at
ambient temperature
EN 2002-002, Aerospace series — Metallic materials — Test methods — Part 002: Tensile testing at
elevated temperature
EN 2002-005, Aerospace series — Test methods for metallic materials — Part 005: Uninterrupted creep
and stress-rupture testing
EN 2003-002, Aerospace series — Steels — Test methods — Part 002: Izod impact test
EN 2032-001, Aerospace series — Metallic materials — Part 001: Conventional designation
EN 2002-16, Aerospace series — Metallic materials — Test methods — Part 16: Non-destructive
testing — Penetrant testing
EN 2032-2, Aerospace series — Metallic materials — Part 2: Coding of metallurgical condition in
delivery condition
EN 2078, Aerospace series — Metallic materials — Manufacturing schedule, inspection schedule,
inspection and test report — Definition, general principles, preparation and approval
EN 2950, Aerospace series — Test method — Wrought heat resisting alloys Semi-finished products and
parts — Conditions for macrographic and micrographic examination — Atlas of structures and defects
EN 2951, Aerospace series — Metallic materials — Micrographic determination of content of non-metallic
inclusions
EN 3874, Aerospace series — Test methods for metallic materials — Constant amplitude force-controlled
low cycle fatigue testing
EN 3987, Aerospace series — Test methods for metallic materials — Constant amplitude force-controlled
high cycle fatigue testing
EN 3988, Aerospace series — Test methods for metallic materials — Constant amplitude strain-
controlled low cycle fatigue testing
EN 4259:2022, Aerospace series — Metallic materials — Definition of general terms

Published as ASD-STAN prEN at the date of publication of this document, available at:
https://www.asd-stan.org/.
EN 10027-1, Designation systems for steels — Part 1: Steel names
EN 10079, Definition of steel products
EN ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method (ISO 148-1)
EN ISO 642, Steel — Hardenability test by end quenching (Jominy test) (ISO 642)
EN ISO 3651-1, Determination of resistance to intergranular corrosion of stainless steels — Part 1:
Austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in nitric acid medium by
measurement of loss in mass (Huey test) (ISO 3651-1)
EN ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels — Part 2:
Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in media containing
sulfuric acid (ISO 3651-2)
EN ISO 3887, Steels — Determination of the depth of decarburization (ISO 3887)
EN ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1)
EN ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method (ISO 6507-1)
EN ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (ISO 6508-1)
EN ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
(ISO 6892-1)
EN ISO 6892-2, Metallic materials — Tensile testing — Part 2: Method of test at elevated temperature
(ISO 6892-2)
AMS 2315, Determination of delta ferrite content
AMS 2750, Pyrometry
ASTM A604, Standard practice for macroetch testing of consumable electrode remelted steel bars and
billets
ASTM E340, Standard practice for macroetching metals and alloys
ASTM E381, Standard method of macroetch testing steel bars, billets, blooms and forgings

Published by Society of Automotive Engineers (SAE), available at: https://www.sae.org/.
Published by American Society for Testing and Materials (ASTM International), available at:
https://www.astm.org/.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 4259:2022 and the following
apply. For definitions specific to steel, EN 10079 applies.
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
batch
quantity of bars and sections consisting of the same nominal dimensions or having the same heat
treatment condition
Note 1 to entry: For the general case, see EN 4259:2022.
Note 2 to entry: For heat treatment using a continuous furnace, a continuous run of less than or equal to eight
hours (or: ≤ 8 h) may be considered as the same heat treatment charge.
[SOURCE: EN 4259:2022, Table 1, No. 4, modified – Addition of Note 1 to entry]
4 Wording of order
The order shall clearly indicate:
a) quantities to be supplied;
b) dates of delivery;
c) material standard number;
d) delivery condition and metallurgical code of products;
e) dimensions and tolerances or reference to an appropriate dimensional standard;
f) product designation, when required;
g) forwarding address;
h) nature and type of packing, if required;
i) surface protection, if appropriate;
j) definition and frequency of any special tests and their retest procedures, if required.
5 Health and safety
The products in the delivery condition shall fulfil the current health and safety laws of the area of the
country where they are to be delivered.
A product safety data sheet shall be available.
6 Technical requirements
6.1 General
The product shall be manufactured in accordance with the requirements of the relevant material
standard and the applicable requirements of this specification. A manufacturing schedule shall be
established and applied in accordance with EN 2078.
Product shall satisfy the requirements of the material standard and/or order and shall be free from
irregularities prejudicial to the subsequent manufacture or use of this product.
Notwithstanding previous acceptance complying with this document, any product that is found at a
later stage to contain such defects shall be rejected.
Unless otherwise specified, the requirements in Table 1 and Table 2 shall apply in conjunction with
those of the relevant material standard. Table 1 relates to lines 1 to 29 (inclusive) of the material
standard and Table 2 relates to lines 30 onwards in which the sub-line format is also used. Lines 2 to 98
may also be opened in line 100 if the material standard details specific qualification requirements. If a
specific line number is not shown in Table 1 and Table 2, the requirement is stated in the material
standard and/or order.
The requirements of the order and/or material standard shall override the requirements of the
technical specification.
6.2 Qualification requirements
Qualification requirements when invoked by the material standard and/or order are detailed in Table 1
and Table 2. Unless otherwise agreed between the manufacturer and purchaser, the qualification phase
shall be run on the first three batches, coming from at least two casts.
6.3 Release requirements
6.3.1 Release tests
Release testing shall be the responsibility of the manufacturer.
The purchaser reserves the right to perform any of the inspections and/or tests required by the
material standard and/or order.
The test samples shall be representative of the product.
When required by the order, the manufacturer shall inform the purchaser of the planned dates for
extraction of samples and release testing in order that these operations may be witnessed.
Table 1 and Table 2 detail the requirements for each line of the material standard. Unless otherwise
specifically requested by the purchaser, a particular inspection and/or test for release shall be carried
out if corresponding acceptance criteria and/or values are stated in the applicable material standard
but see also in subclause 6.3.5.
6.3.2 Retests
If any requirement is not met, retests shall be carried out under the following conditions unless
otherwise stated in the material standard or order.
If the test procedure or test piece preparation is faulty, testing shall be re-applied at the original
frequency after rectification of the original cause of failure, on a test sample located near the first one.
When failure cannot be attributed to faulty testing, or test piece preparation, further test samples shall
be selected at twice the original frequency from the product, one of which shall be that on which the
original results were obtained unless already withdrawn by the manufacturer after suitable
identification of the cause of failure. If all retest results are satisfactory, the batch shall be accepted.
If one or more tests are unsatisfactory, the batch shall be:
 — rejected;
 — 100 % retested and the conforming products accepted; or
 — partially or fully re-heat treated if heat treatment can rectify the cause of the failure and
tested as a completely new batch except for chemical composition and cleanness inspection. The
reheat treatment shall be stated on the release test certificate.
For cleanness inspection, if the material fails the requirement the product may be cut back
before retesting.
6.3.3 Rejection
Any failure to meet the requirements of the material standard shall be cause for rejection.
6.3.4 Special tests
Special tests may be required by the purchaser. In such cases, the nature of the test, method, frequency
and technical requirements shall be specified on the order or inspection schedule and shall be mutually
agreed by the manufacturer and purchaser.
6.3.5 Capability clause
Where the capability clause is invoked and where sufficient statistical evidence exists, the test need not
be carried out (unless specifically requested by the purchaser).
However, this in no way reduces the obligations of the manufacturer to fulfil the requirements.
If subsequent testing indicates that the product does not comply with the requirements, the batch shall
be rejected.
6.3.6 Statistical process control
Reduction in the extent of release testing, other than that specified in subclause 6.3.5 above, may be
negotiated with the purchaser on the basis of appropriate statistical process control and/or
statistical data.
6.3.7 Inspection and test report
The manufacturer shall furnish, with each delivery, a report conforming to the requirements of EN 2078
stating the following:
a) manufacturer's name and address and, if appropriate, identification of the plant;
b) order number;
c) material standard number;
d) delivery condition and metallurgical code of the product;
e) quantity and dimensions;
f) manufacturing and inspection schedule reference;
g) cast and batch number;
h) batch and/or test samples heat treatment conditions;
i) results of the tests and retests if any.
6.4 Traceability
Each product shall be traceable to the cast, production batch and/or heat treatment batch at all stages
of manufacture, testing and delivery.
7 Requirements
Requirements are given in Table 1 and Table 2.
Table 1 — Technical requirements for lines 1 to 29, where appropriate
Material standard line
Requirements Frequency of testing
reference
Qualification Release
No. Title
1 Material designation EN 2032-001 and EN 10027-1 if applicable — —
2 Chemical composition The chemical composition of the alloy shall comply with requirements of the material standard. a) 1 per cast a) 1 per
in the case cast in
The test samples used for chemical analysis shall be representative of the melt.
of air the case
The method of analysis shall be at the option of the manufacturer, but in cases of dispute, the
melted or of air
reference method set out in the relevant EN or ISO standard shall be used. If no EN or ISO standard
vacuum melted
exists, a fundamental and agreed method of chemical analysis calibrated against accepted reference
induction or
standards shall be used.
melted vacuum
In the case of remelted material, samples shall be taken from positions as follows:
product inductio
a) vacuum arc remelted (VAR) ingots: the bottom of each ingot or ingot product;
n
b) 2 per VAR
melted
b) electroflux or electroslag remelted (ESR) ingots: the top and bottom ends of each ingot or ingot
or ESR
product
product.
ingot
representi b) 1 on one
An analysis shall be made of each sample and certificates of analysis shall be supplied to the
purchaser. The elements to be determined shall be as required by the material specification or as ng top and ingot or
bottom ingot
agreed between the manufacturer and the purchaser.
positions product
Elements not quoted in the material standard shall not be intentionally added to the alloy without
in case
the agreement of the purchaser, except for the purpose of finishing the heat (e.g. addition of
of VAR
deoxidant); reasonable precautions shall be taken
...