EN 2576:2020

Aerospace series - Bolts, MJ threads, in heat resisting steel FE-PA2601 (A286) - Classification: 900 MPa (at ambient temperature)/650 °C - Technical specification

This European standard specifies the characteristics, qualification and acceptance requirements for bolts with MJ threads in heat resisting steel FE-PA2601, for aerospace applications.
Classification: 900 MPa1/650 °C2.
It is applicable whenever referenced.

Luft- und Raumfahrt - Schrauben, MJ-Gewinde, aus hochwarmfestem Stahl FE-PA2601 (A286) - Klasse: 900 MPa (bei Raumtemperatur)/650 °C - Technische Lieferbedingungen

Dieses Dokument legt die Eigenschaften sowie die Qualifikations- und Annahmeanforderungen für Schrauben mit MJ-Gewinde aus hochwarmfestem Stahl FE PA2601 für Anwendungen in der Luft- und Raumfahrt fest.
Klasse: 900 MPa /650 °C .
Es gilt in allen Fällen, in denen darauf verwiesen wird.

Série aérospatiale - Vis à filetage MJ, en acier résistant à chaud FE-PA2601 (A286) - Classification : 900 MPa (à température ambiante)/650 °C - Spécification technique

La présente norme européenne spécifie les caractéristiques, les exigences de qualification et de réception des vis à filetage MJ en acier résistant à chaud FE-PA2601, pour applications aérospatiales.
Classification : 900 MPa1) 650 °C 2)
Elle est applicable chaque fois qu'elle est citée en référence.

Aeronavtika - Sorniki, navoj MJ, iz toplotno odpornega jekla FE‑PA2601 (A286) - Klasifikacija: 900 MPa (pri okoljski temperaturi)/650 °C - Tehnična specifikacija

General Information

• Status: Published
• Publication Date: 12-May-2020
• Withdrawal Date: 29-Nov-2020
• ICS: 49.030.20 - Bolts, screws, studs
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3 - Mechanical
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 13-May-2020
• Completion Date: 13-May-2020
• Ref Project: SIST EN 2576:2020 - Aerospace series - Bolts, MJ threads, in heat resisting steel FE‑PA2601 (A286) - Classification: 900 MPa (at ambient temperature)/650 °C - Technical specification

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 2576:2020
01-julij-2020
Aeronavtika - Sorniki, navoj MJ, iz toplotno odpornega jekla FE‑PA2601 (A286) -

Klasifikacija: 900 MPa (pri okoljski temperaturi)/650 °C - Tehnična specifikacija

Aerospace series - Bolts, MJ threads, in heat resisting steel FE‑PA2601 (A286) -

Classification: 900 MPa (at ambient temperature)/650 °C - Technical specification

Luft- und Raumfahrt - Schrauben, MJ-Gewinde, aus hochwarmfestem Stahl FE-PA2601
(A286) - Klasse: 900 MPa (bei Raumtemperatur)/650 °C - Technische
Lieferbedingungen

Série aérospatiale - Vis à filetage MJ, en acier résistant à chaud FE‑PA2601 (A286) -

Classification : 900 MPa (à température ambiante)/650 °C - Spécification technique

Ta slovenski standard je istoveten z: EN 2576:2020
ICS:
49.030.20 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
SIST EN 2576:2020 en,fr,de

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

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SIST EN 2576:2020
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SIST EN 2576:2020
EN 2576
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2020
EUROPÄISCHE NORM
ICS 49.030.20
English Version
Aerospace series - Bolts, MJ threads, in heat resisting steel
FE-PA2601 (A286) - Classification: 900 MPa (at ambient
temperature)/650 °C - Technical specification

Série aérospatiale - Vis à filetage MJ, en acier résistant Luft- und Raumfahrt - Schrauben, MJ-Gewinde, aus

à chaud FE-PA2601 (A286) - Classification : 900 MPa hochwarmfestem Stahl FE-PA2601 (A286) - Klasse:

(à température ambiante)/650 °C - Spécification 900 MPa (bei Raumtemperatur)/650 °C - Technische

technique Lieferbedingungen
This European Standard was approved by CEN on 30 September 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

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2576:2020 E

worldwide for CEN national Members.
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SIST EN 2576:2020
EN 2576:2020 (E)
Contents
Page

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

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

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

3 Terms and definitions ................................................................................................................................... 4

4 Quality assurance ............................................................................................................................................ 6

4.1 Qualification ...................................................................................................................................................... 6

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

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

4.2.2 Conditions .......................................................................................................................................................... 7

4.2.3 Responsibility ................................................................................................................................................... 7

4.2.4 Inspection and test report ........................................................................................................................... 7

5 Requirements ................................................................................................................................................... 7

Annex A (normative) Passivation treatment for bolts ................................................................................. 25

A.1 Pre-treatment ................................................................................................................................................ 25

A.2 Passivation ..................................................................................................................................................... 25

A.3 Water rinse ..................................................................................................................................................... 25

A.4 Finish ................................................................................................................................................................ 25

Annex B (informative) Tensile, stress rupture — Areas and loads formulae ..................................... 26

B.1 Cross sectional area values ....................................................................................................................... 26

B.2 Formulae ......................................................................................................................................................... 27

B.2.1 Cross sectional area ..................................................................................................................................... 27

B.2.2 Test load in kN ............................................................................................................................................... 27

Annex C (informative) Standard evolution form ........................................................................................... 28

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

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SIST EN 2576:2020
EN 2576:2020 (E)
European foreword

This document (EN 2576:2020) 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 November 2020, and conflicting national standards

shall be withdrawn at the latest by November 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.

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 2576:2020
EN 2576:2020 (E)
1 Scope

This document specifies the characteristics, qualification and acceptance requirements for bolts with MJ

threads in heat resisting steel FE-PA2601, for aerospace applications.
1 2
Classification: 900 MPa /650 °C .
It is applicable whenever referenced.
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 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

EN ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature

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 5855-2, Aerospace — MJ threads — Part 2: Limit dimensions for bolts and nuts
ISO 7961, Aerospace — Bolts — Test methods
ASTM E 112, Standard Test Methods for Determining Average Grain Size
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/
Minimum tensile strength of the material at ambient temperature.
Maximum test temperature of the parts.
3 Published by: ASTM International (http://www.astm.org/).
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EN 2576:2020 (E)
3.1
batch

quantity of finished parts, of the same type and same diameter, produced from the same material

obtained from the same melt, manufactured in the course of the same production cycle, following the

same manufacturing route and having undergone all the relevant heat treatments and surface

treatments
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

the 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
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
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SIST EN 2576:2020
EN 2576:2020 (E)
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

product standard or definition document
3.13
definition document
document specifying all the requirements for finished bolts
4 Quality assurance
4.1 Qualification

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.

Qualification inspections and tests (requirements, methods, number of bolts) are specified in Table 1.

They shall be carried out on:
— each type and diameter of bolt;
— 25 bolts selected from a single inspection lot by simple random sampling.
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EN 2576:2020 (E)

The test programme may possibly be reduced, or the qualification of a bolt be granted without

inspection or testing: any such decision shall be based on the results obtained on similar types and

diameters of bolts provided that the design and manufacturing conditions are identical.

Table 2 indicates the allocation of bolt samples for the inspections and tests.
4.2 Acceptance
4.2.1 Purpose

The purpose of acceptance inspections and tests is to check, as simply as possible, by a method

representative of actual use conditions, with the uncertainty inherent to statistical sampling, that the

bolts constituting the batch satisfy the requirements of this standard.
4.2.2 Conditions

Acceptance inspections and tests (requirements, methods, number of bolts) are specified in Table 1;

they shall be carried out on each batch. Bolts from the batch to be tested shall be selected by simple

random sampling.
Each bolt may be submitted to several inspections or tests.

If a more stringent inspection is deemed necessary, all or part of the qualification inspections and tests

may be performed during the acceptance inspection and testing. In this case, the number of bolts

submitted to these inspections and tests is the same as that submitted for qualification inspection and

tests.
4.2.3 Responsibility

Acceptance inspections and tests shall be carried out by the manufacturer, or under his responsibility.

4.2.4 Inspection and test report

A test report showing actual numerical values shall be provided if specified in the purchase order.

5 Requirements
See Table 1.
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EN 2576:2020 (E)
Table 1 — Technical requirements and test methods
Clause Characteristic Requirement Inspection and test Sample
Q/A
method size
5.1 Material In accordance with the product Chemical analysis or Q
standard or definition certificate of compliance
document issued by the manufacturer
of the semi-finished product
5.2 Dimensions, In accordance with the product Standard gauging Q 25
tolerances and standard or definition
A Table 3
tolerances document
and
of form and
Table 4
position
5.3 Manufacturing
5.3.1 Forging The heads of the bolts shall be The method of forging shall Q
formed by hot or cold forging. be indicated.
If hot forged, the forging
temperature shall not exceed
1 150 °C and they shall be air
cooled.
The equipment shall ensure a
uniform temperature
throughout the batch.
5.3.2 Heat treatment The heat treatment medium or Calibration of the heat Q
atmosphere shall not cause any treatment equipment shall
surface contamination except as be confirmed.
permitted by 5.5.6.
Any scale not removed by Visual examination
subsequent machining shall be
removed by abrasive blasting
with appropriate equipment.
5.3.2.1 Solution heat The headed blanks shall be Examination of the heat
treatment solution treated at a treatment specification
temperature of (980 ± 15) °C,
held at this temperature and
quenched in oil, water or
equivalent.
5.3.2.2 Precipitation Before cold rolling the
underhead radius, and thread
heat treatment
rolling, the parts shall be
precipitation heat treated at
710 °C to 730 °C, holding the
selected temperature within
±8 °C for not less than 16 hours
and cooling in air or equivalent.
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EN 2576:2020 (E)
Clause Characteristic Requirement Inspection and test Sample
Q/A
method size
5.3.3 Removal of After heat treatment the headed
surface blanks shall have the shank and
contamination bearing surface of the head
by machining machined:
or sand
a) for the removal of all See 5.5.6.
blasting.
surface contamination and
oxide penetration;
b) to obtain a clean smooth
surface.
The amount of material See 5.5.1.
removed (see Figure 1) shall be
as little as practicable and shall
not exceed the limits of Table 5.

5.3.4 Head to shank After completion of solution, Dimensional check (see 5.2) Q 25

fillet precipitation heat treatment and visual examination
A Table 3
and machining, the underhead
and
fillet radius shall be cold rolled
Table 4
to remove all visual signs of
machining and to create cold
working.
This may cause distortion which
shall not exceed the values in
Figure 2, unless otherwise
specified on the product
standard or definition
document.
For parts with compound radii
between head and shank (e. g.
T head bolts), only the radius
that blends with the head shall
be cold worked, however it is
acceptable for cold work to
extend over the compound
radius.
The fillet shall not show seams
or inclusions (see Table 6).
5.3.5 Threads Shall be formed by a single Q
rolling process after all heat
treatment and machining
(see Figure 3).
5.3.6 Surface In accordance with the product EN ISO 4288 Q 3
roughness standard or definition
Visual examination A Table 3
document
and
Table 4
A 100 %
5.3.7 Surface coating In accordance with the product See applicable coating Q 3
standard or definition standard.
A Table 3
document
and
Table 4
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EN 2576:2020 (E)
Clau
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