Aerospace series - Bolts in heat resisting steel FE-PA2601 (A286) - Classification: 1 100 MPa/650 °C - Technical specification

This document specifies the technical, qualification and quality assurance requirements for bolts in material FE-PA2601 (A286) of tensile strength class 1 100 MPa at room temperature, maximum test temperature of material 650 °C.
Primarily for aerospace applications it is applicable to such bolts when referenced on the product standard or definition document.

Luft- und Raumfahrt - Schrauben aus hochwarmfestem Stahl FE-PA2601 (A286) - Klasse: 1 100 MPa/650 °C - Technische Lieferbedingungen; Deutsche und Englische Fassung EN 3685:2008

Diese Europäische Norm legt die technischen Lieferbedingungen, Qualifikationsbedingungen sowie die Anforderungen an die Qualitätssicherung für Schrauben aus dem Werkstoff FE-PA2601 (A286), Zugfestigkeitsklasse 1 100 MPa bei Raumtemperatur und einer maximalen Prüftemperatur des Werkstoffes von 650 °C fest.
Diese Norm gilt in erster Linie für Anwendungszwecke im Bereich Luft- und Raumfahrt und ist für diejenigen Schrauben anzuwenden, bei denen in der zugehörigen Produktnorm oder Bauunterlage auf sie verwiesen wird.

Série aérospatiale - Vis en acier résistant à chaud FE-PA2601 (A286) - Classification : 1 100 MPa/650 °C - Spécification technique

La présente Norme européenne spécifie les exigences techniques, de qualification et d’assurance qualité des vis en matériau FE-PA2601 (A286), de classe de résistance à la traction de 1 100 MPa à température ambiante, température d’essai maximale du matériau de 650 °C.
Cette norme, essentiellement prévue pour les applications aéronautiques, s’applique à ce type de vis lorsqu’elle est citée dans la norme de produit ou le document de définition.

Aeronavtika - Sorniki iz toplotnoodpornega jekla FE-PA2601 (A286) - Klasifikacija: 1100 MPa/650 °C - Tehnična specifikacija

Ta dokument določa tehnične, kvalifikacijske in kakovostne zahteve za sornike iz toplotnoodpornega jekla FE-PA2601 (A286) natezne trdnosti 1100 MPa pri sobni temperaturi, pri čemer je najvišja preskusna temperatura materiala 650 °C.
Prvotno je namenjen za uporabo v aeronavtiki in se uporablja za take sornike, kadar se nanj sklicuje standard za izdelek ali definicijski dokument.

General Information

Status
Published
Publication Date
08-Oct-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
04-Oct-2019
Due Date
09-Dec-2019
Completion Date
09-Oct-2019

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SLOVENSKI STANDARD
SIST EN 3685:2019
01-december-2019
Nadomešča:
SIST EN 3685:2008

Aeronavtika - Sorniki iz toplotnoodpornega jekla FE-PA2601 (A286) - Klasifikacija:

1100 MPa/650 °C - Tehnična specifikacija

Aerospace series - Bolts in heat resisting steel FE-PA2601 (A286) - Classification: 1 100

MPa/650 °C - Technical specification
Luft- und Raumfahrt - Schrauben aus hochwarmfestem Stahl FE-PA2601 (A286) -
Klasse: 1 100 MPa/650 °C - Technische Lieferbedingungen; Deutsche und Englische
Fassung EN 3685:2008

Série aérospatiale - Vis en acier résistant à chaud FE-PA2601 (A286) - Classification : 1

100 MPa/650 °C - Spécification technique
Ta slovenski standard je istoveten z: EN 3685:2019
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
49.025.10 Jekla Steels
49.030.20 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
SIST EN 3685:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 3685:2019
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SIST EN 3685:2019
EN 3685
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2019
EUROPÄISCHE NORM
ICS 49.030.20 Supersedes EN 3685:2008
English Version
Aerospace series - Bolts in heat resisting steel FE-PA2601
(A286) - Classification: 1 100 MPa/650 °C - Technical
specification

Série aérospatiale - Vis en acier résistant à chaud FE- Luft- und Raumfahrt - Schrauben aus hochwarmfestem

PA2601 (A286) - Classification : 1 100 MPa/650 °C - Stahl FE-PA2601 (A286) - Klasse: 1 100 MPa/650 °C -

Spécification technique Technische Lieferbedingungen
This European Standard was approved by CEN on 1 March 2019.

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, Turkey 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

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3685:2019 E

worldwide for CEN national Members.
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SIST EN 3685:2019
EN 3685:2019 (E)
Contents
Page

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 5

4 Certification and quality assurance .......................................................................................................... 7

4.1 Qualification ...................................................................................................................................................... 7

4.1.1 Purpose ............................................................................................................................................................... 7

4.1.2 Conditions .......................................................................................................................................................... 7

4.1.3 Qualification test requirements and procedures ................................................................................ 7

4.1.4 Qualified manufacturers .............................................................................................................................. 7

4.2 Acceptance ......................................................................................................................................................... 7

4.2.1 Purpose ............................................................................................................................................................... 7

4.2.2 Conditions .......................................................................................................................................................... 8

4.3 Quality system certification ........................................................................................................................ 8

4.3.1 Purpose ............................................................................................................................................................... 8

4.3.2 Requirements and procedure ..................................................................................................................... 8

4.4 Responsibility for inspection and tests ................................................................................................... 8

4.5 Inspection and test report ........................................................................................................................... 8

5 Technical requirements and test methods ............................................................................................ 9

Bibliography ................................................................................................................................................................. 29

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SIST EN 3685:2019
EN 3685:2019 (E)
European foreword

This document (EN 3685:2019) has been prepared by the Aerospace and Defence Industries

Association of Europe - Standardization (ASD-STAN).

After enquiries and votes carried out in accordance with the rules of this Association, this Standard has

received the approval of the National Associations and the Official Services of the member countries of

ASD, prior to its presentation to CEN.

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 February 2020, and conflicting national standards

shall be withdrawn at the latest by February 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent

rights.
This document supersedes EN 3685:2008.

According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Turkey and the

United Kingdom.
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SIST EN 3685:2019
EN 3685:2019 (E)
1 Scope

This European standard specifies the technical specification, qualification and quality assurance

requirements for bolts in material FE–PA2601 (A286) of tensile strength class 1 100 MPa at room

temperature, maximum test temperature of material 650 °C.

Primarily for aerospace applications it is applicable to such bolts when referenced on the product

standard or definition document.
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 3041, Aerospace series — Propulsion standard parts — Manufacturing process change procedure for

qualified parts

EN 3761, Aerospace series — Heat resisting alloy FE-PA2601 — Softened and cold worked — Bar for

forged fasteners — D ≤ 50 mm — 1 100 MPa ≤ R ≤ 1 300 MPa

EN ISO 3452-1, Non-destructive testing — Penetrant testing — Part 1: General principles

EN ISO 4288, Geometrical product specifications (GPS) — Surface texture: Profile method — Rules and

procedures for the assessment of surface texture
EN ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method

ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by

acceptance quality limit (AQL) for lot-by-lot inspection
ISO 7961, Aerospace series — Bolts — Test methods

ASD-STAN/TR 3040-1, Aerospace series — Quality assurance — EN aerospace products — Part 1: List of

approved manufacturers
ASD-STAN/TR 3775, Bolts and pins — Materials
ASTM E112, Standard Test Methods for Determining Average Grain Size

1 In preparation at the date of publication of this European standard (www.asd-stan.org).

2 Published as ASD-STAN-Prestandard at the date of publication of this European standard by AeroSpace and Defence

Industries Association of Europe – Standardization (ASD-STAN) (www.asd-stan.org).

3 Published as ASD-STAN Technical Report at the date of publication of this European standard by AeroSpace and Defence

Industries Association of Europe – Standardization (ASD-STAN) (www.asd-stan.org).

4 Published by: ASTM International, 100 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, USA.

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SIST EN 3685:2019
EN 3685:2019 (E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

 ISO Online browsing platform: available at http://www.iso.org/obp
 IEC Electropedia: available at http://www.electropedia.org/
3.1
production batch

quantity of finished parts fabricated by the same process from a single material cast (single heat of

alloy), having the same basic part number and diameter, heat treated together to the same specified

condition and produced as one continuous run
3.2
inspection lot

quantity of parts from a single production batch of the same part number which completely defines the

parts
3.3 Surface discontinuities
3.3.1
crack

rupture in the material which may extend in any direction and which may be intercrystalline or

transcrystalline in character
3.3.2
seam

longitudinal surface discontinuity in the form of an unwelded open fold in the material

3.3.3
lap

surface discontinuity caused by folding over metal fins or sharp corners and then rolling or forging

them into the surface
3.3.4
inclusion
non-metallic particles originating from the material manufacturing process

Note 1 to entry: These particles may be isolated or arranged in strings extending longitudinally.

3.4
test temperature
ambient temperature, unless otherwise specified
3.5
simple random sampling

taking of n items from a population of N items in such a way that all possible combinations of n items

have the same probability of being chosen
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SIST EN 3685:2019
EN 3685:2019 (E)
3.6
critical defect

defect that according to judgement and experience, is likely to result in hazardous or unsafe conditions

for individuals using, maintaining, or depending upon the considered product, or that is likely to

prevent performance of the function of a major end item
3.7
major defect

defect other than critical, that is likely to result in a failure or to reduce materially the usability of the

considered product for its intended purpose
3.8
minor defect

defect that is not likely to reduce materially the usability of the considered product for its intended

purpose, or that is a departure from established specification having little bearing on the effective use

or operation of this product
3.9
sampling plan

plan according to which one or more samples are taken in order to obtain information and possibly to

reach a decision
3.10
Limiting Quality

quality level in a sampling plan, which corresponds to a specified and relatively low probability of

acceptance, in this case 10 % probability of acceptance

Note 1 to entry: It is the limiting lot quality characteristic that a lot of this quality would occur.

3.11
Acceptance Quality Limit
AQL

quality limit which in a sampling plan corresponds to a specified but relatively high probability of

acceptance

Note 1 to entry: It is the maximum per cent defective (or the maximum number of defects per hundred units)

that, for purposes of sampling inspection, can be considered satisfactory as a process average.

3.12
finished bolt

bolt ready for use, inclusive of any possible treatments and/or surface coatings, as specified in the

dimensional standard or definition document
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SIST EN 3685:2019
EN 3685:2019 (E)
4 Certification and quality assurance
4.1 Qualification
4.1.1 Purpose

The purpose of qualification tests is to ensure that the bolt design and bolt manufacturing conditions

allow the bolt to comply with the requirements of this document.
4.1.2 Conditions

The qualification tests summarized in Table 3 shall be performed on each type and diameter of bolt.

Proposed changes in manufacturing source or procedure shall be subject to the requirements of

EN 3041.

25 bolts selected from a single inspection lot by simple random sampling shall be subjected to the

qualification tests.

The number of bolts to be subjected to each test as well as the method(s) to be used are specified in

Table 1.
The tests to be applied to each bolt are shown in Table 4.

The test programme may possibly be reduced, this decision will be based on the comparison of results

obtained from parts of similar design, size and manufacturing conditions.

All or part of these tests may also be performed for production acceptance, when a reinforced

inspection seems to be necessary, or to survey bolts that have not proved satisfactory in use.

In that case, the sample to be subjected to these tests is the same as that used for production acceptance

tests.
4.1.3 Qualification test requirements and procedures

The technical requirements for the product standard qualification system (e. g. according to EN 9133 or

an equivalent aerospace accepted and established qualification system) shall be used and documented

according to the specified tests if not otherwise agreed between customer and supplier.

4.1.4 Qualified manufacturers

A list of qualified manufacturers for specific standard parts is listed in ASD-STAN/TR 3040-1.

4.2 Acceptance
4.2.1 Purpose

The purpose of acceptance tests is to check, as simply as possible, by a method representative of actual

use conditions, with the uncertainty inherant to statistical sampling, that the bolts constituting the

batch satisfy the requirements of this European standard.
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SIST EN 3685:2019
EN 3685:2019 (E)
4.2.2 Conditions

Acceptance tests are summarized in Table 3. They shall be performed on each batch. Table 1 specifies

the test method and sampling plan to be used for each test. Bolts from the batch to be tested shall be

selected by simple random sampling.
Each bolt may be submitted to several tests.

The bolts to be subjected to destructive tests may be those on which non-destructive tests have been

performed.
4.3 Quality system certification
4.3.1 Purpose

The purpose of quality system certification is to ensure that the manufacturer has demonstrated the

acceptability of his quality system and his ability for continuing production of parts to this document, to

the required limit of quality.
4.3.2 Requirements and procedure

The manufacturer’s operations shall be an approved production organization for aerospace products

and shall demonstrate that it has implemented and is able to maintain a quality system (e. g. according

to EN 9100 or an equivalent aerospace accepted and established quality management system).

The qualification procedure for aerospace standard products (e. g. according to EN 9133 or an

equivalent aerospace accepted and established qualification procedure) shall be used and documented

according to the specified tests if not otherwise agreed between customer and supplier.

4.4 Responsibility for inspection and tests

The manufacturer is responsible for the performance of all inspection and test requirements as

specified herein. Each manufacturer will use their own or exceptionally any other facilities approved in

accordance with clause 4.1 and clause 4.2 for the implementation of these inspection and test

requirements.
4.5 Inspection and test report

A test report showing actual numerical values shall be provided at the purchaser's option as part of the

terms of the purchase order.
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SIST EN 3685:2019
EN 3685:2019 (E)
5 Technical requirements and test methods
See Table 1.
Table 1
Inspection and test Sample
Clause Characteristic Requirement Q/A
method size
5.1 Material Material FE-2601 to As stated in the material
specification EN 3761 or to specification.
specification
ASD-STAN/TR 3775,
Table 3, strength class
1 100 MPa supplied by an
approved source shall be
used for the manufacture
of bolts to this European
standard.
5.2 Dimensions, Q 25
tolerances of
A Table 6
form and
and
position,
Table 7
threads and
quality
5.2.1 Dimensions The dimensions of the All dimensions shall be
finished bolts shall controlled by an approved
conform to the product system of gauging.
standard or drawing.
5.2.2 Tolerances of Tolerances of form and Tolerances of form and
form and position shall conform to position shall be
position the product standard or controlled by an approved
drawing. system of gauging.
5.2.3 Threads Threads shall conform to Threads shall be gauged
the product standard or by an approved system of
drawing. gauging.
5.3 Manufacturing
5.3.1 Forging The heads of the bolts shall The method of forging
be formed by hot or cold shall be approved.
forging. If hot forged the
forging temperature shall
not exceed 1 150 °C and
shall be air cooled or
faster. The heating
equipment for forging shall
be of a type which ensures
a consistent temperature
throughout the batch.
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SIST EN 3685:2019
EN 3685:2019 (E)
Inspection and test Sample
Clause Characteristic Requirement Q/A
method size
5.3.2 Heat treatment The heat treatment The heat treatment
medium or atmosphere equipment shall be
shall not cause any surface approved.
contamination except as
permitted by 5.5.6.
Any scale which will not be The equipment for
removed by subsequent abrasive blasting shall be
machining shall be approved.
removed by abrasive
blasting.
5.3.2.1 Solution and The headed blanks shall be
precipitation precipitation treated at a
heat treatment temperature 710 °C to
730 °C holding the selected
temperature within ±8 °C
for not less than 16 hours
and cooling in air.
5.3.3 Removal of After precipitation treat- See 5.5.1.
surface ment the headed blanks
contamination shall have the shank and
bearing surface of the head
machined:
a) for the removal of all
surface contamination
and oxide penetration;
b) to obtain a clean
smooth surface.
The amount of material
removed (see Figure 1)
shall be as little as
practicable and shall
respect the requirements
of 5.5.1.
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SIST EN 3685:2019
EN 3685:2019 (E)
Inspection and test Sample
Clause Characteristic Requirement Q/A
method size
5.3.4 Head-to-shank After completion of pre- Dimensional check Q 25
fillet cipitation treatment and (see 5.5.2) and visual
machining the underhead examination.
radius shall be cold rolled
A Table 6
sufficiently to remove all
and
evidence of machining.
Table 7
Cold rolling the head to
shank fillet radius may
cause distortion of the fillet
area. Any such distortion
shall be in accordance with
the requirements of
Figure 2 unless otherwise
specified on the bolt
standard or drawing.
For parts with compound
radii between head and
shank, co
...

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