SIST EN 3818:2004
(Main)Aerospace series - Bolts with MJ threads, in titanium alloy TI-P64001 - Classification: 1100 MPa (at ambient temperature) - Technical specification
Aerospace series - Bolts with MJ threads, in titanium alloy TI-P64001 - Classification: 1100 MPa (at ambient temperature) - Technical specification
This standard specifies the characteristics, qualification and acceptance requirements for bolts with MJ threads in TI-P63.
Classification : 1 100 MPa
It is applicable whenever referenced.
Série aérospatiale - Vis a filetage MJ, en alliage de titane TI-P63 - Classification:1 100 MPa (a température ambiante) - Spécification technique
Aerospace series - Bolts with MJ threads, in titanium alloy TI-P64001 - Classification: 1100 MPa (at ambient temperature) - Technical specification
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 3818:2004
01-maj-2004
Aerospace series - Bolts with MJ threads, in titanium alloy TI-P64001 -
Classification: 1100 MPa (at ambient temperature) - Technical specification
Aerospace series - Bolts with MJ threads, in titanium alloy TI-P64001 - Classification:
1100 MPa (at ambient temperature) - Technical specification
Série aérospatiale - Vis a filetage MJ, en alliage de titane TI-P63 - Classification:1 100
MPa (a température ambiante) - Spécification technique
Ta slovenski standard je istoveten z: EN 3818:2003
ICS:
49.030.20 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
SIST EN 3818:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 3818:2004
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SIST EN 3818:2004
EUROPEAN STANDARD
EN 3818
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2003
ICS 49.030.20
English version
Aerospace series - Bolts with MJ threads, in titanium alloy TI-
P64001 - Classification: 1100 MPa (at ambient temperature) -
Technical specification
This European Standard was approved by CEN on 19 August 2002.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovak Republic, Spain, Sweden, Switzerland and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3818:2003 E
worldwide for CEN national Members.
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SIST EN 3818:2004
EN 3818:2003 (E)
Contents
page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions.5
4 Quality assurance .7
5 Requirements .7
Annex A (informative) Tensile and tension fatigue - areas and loads formulae.25
A.1 Cross sectional area values.25
A.2 Formulae.25
A.2.1 Cross sectional area.25
A.2.2 Tensile test load.26
A.2.3 Tension fatigue test load.26
2
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SIST EN 3818:2004
EN 3818:2003 (E)
Foreword
This document EN 3818:2003 has been prepared by the European Association of Aerospace Manufacturers
(AECMA).
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 AECMA, 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 August 2003, and conflicting national standards shall be withdrawn at the latest by
August 2003.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard : Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,
Slovak Republic, Spain, Sweden, Switzerland and United Kingdom.
3
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SIST EN 3818:2004
EN 3818:2003 (E)
1 Scope
This standard specifies the characteristics, qualification and acceptance requirements for bolts with MJ threads in
TI-P64001.
1)
Classification : 1 100 MPa
It is applicable whenever referenced.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
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 3452, Non-destructive testing - Penetrant inspection - General principles.
ISO 3534, Statistics -Vocabulary and symbols.
ISO 4288, Geometrical Product Specifications (GPS) - Surface texture: Profile method - Rules and procedures for
the assessment of surface texture.
ISO 5855-2, Aerospace - MJ threads - Part 2: Limit dimensions for bolts and nuts.
ISO 6892, Metallic materials - Tensile testing at ambient temperature.
ISO 7961, Aerospace - Bolts - Test methods.
EN 3042, Aerospace Series -Quality assurance -EN aerospace products -Qualification procedure.
1) Minimum tensile strength of the material at ambient temperature
4
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SIST EN 3818:2004
EN 3818:2003 (E)
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
3.1
production batch
quantity of finished bolts Manufactured, using 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 bolts from a single production batch with the same part number which completely defines the bolt.
3.3 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
open surface defect which is the result of the extension of the material
3.3.3
lap
surface defect caused by folding over metal fins or sharp corners and then rolling or forging them into the surface
3.3.4
inclusions
non-metallic particles originating from the material manufacturing process. These particles may be isolated or
arranged in strings
3.4
test temperature
ambient temperature, unless otherwise specified
3.5
2)
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
2)
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
2
) Definitions taken in ISO 3534
5
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SIST EN 3818:2004
EN 3818:2003 (E)
3.7
2)
major defect
defect other than critical, that is likely to result in a failure or to reduce materially the useability of the considered
product for its intended purpose
3.8
3)
minor defect
defect that is not likely to reduce materially the useability of the considered product for its intended purpose, or that
is a departure from established specification having a little bearing on the effective use or operation of this product
3.9
2)
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 (LQ )
10
in a sampling plan, a quality level which corresponds to a specified and relatively low probability of acceptance, in
this case 10 % probability of acceptance
3.11
2)
acceptable quality level (AQL)
quality level which is a sampling plan corresponds to a specified but relatively high probability of acceptance.
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
microstructural shearing (shear bending)
V or U shaped rippled grain structure immediately below the thread root, or chevron shaped rippled grain structure
within the thread crest
3.13
finished bolt
bolt ready for use, inclusive of any possible treatments and/or surface coatings, as specified in the product
standard or definition document
3.14
definition document
document specifying all the requirements for finished bolts
3
Definitions taken in ISO 3534
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SIST EN 3818:2004
EN 3818:2003 (E)
4 Quality assurance
4.1 Qualification
EN 3042
Qualification inspections and tests (requirements, methods, numbers of bolts) are specified in Table 1.They shall
be carried out on:
-each type diameter of bolt;
-25 bolts selected from a single inspection lot by simple random sampling.
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 specimens for the inspections and tests.
4.2 Acceptance
4.2.1 Purpose
The purpose of acceptance inspection 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 to this standard.
4.2.2 Conditions
Acceptance inspections and tests (requirements, methods, numbers of bolts) are specified in Table 1; they shall be
carried out on each production batch. Bolts from the batch or lot 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 test 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 at the puchaser's option as part of the terms of the
purchase order.
5 Requirements
See Table 1
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SIST EN 3818:2004
EN 3818:2003 (E)
Table 1 — Technical requirements and test methods
a)
Clause Characteristic Requirement Inspection and test method Sample size
Q/A
5.1 Material In accordance with the product Chemical analysis or certificate Q
standard or definition document of conformity issued by the
A
manufacturer of the semi-
finished product
5.2 Dimensions, In accordance with the product Standard gauging Q20
tolerances and standard or definition document
A See Tables
tolerances of form
5and6
and position
5.3 Manufacturing
5.3.1 Forging The head of the bolts shall be According to the route of Q
forged by a hot forging process manufacture
before heat treatment
The equipment shall ensure an
The equipment used shall be
adequate and uniform temperature
approved.
throughout the production batch.
5.3.2 Heat treatment The forged blanks shall be heat According to process control Q
treated to produce the properties
required by the definition
document.
Blanks shall not be heat treated
The equipment shall be
more than twice.
approved
5.3.3 Removal of surface If machining is required the
contamination requirements of 5.5.1 shall be
(bearing face and respected.
shank}
5.3.4 Filet between head The fillet radius shall be cold rolled Visual examination underQFive
b)
after heat treatment and appropriate magnification and
and shank
A See Table
machining so as to remove all dimensional check
visual signs of machining and to
5 and 6
create superficial cold working.
The deformation shall not exceed
the values in Figure 2.
5.3.5 Threads Formed by a single rolling process According to the manufacturing
after full heat treatment route
5.3.6 Surface roughness The surface roughness shall be as ISO 4288 – Visual comparisonQFive
specified by the product standard method
A See Tables
or the definition document prior to
surface coating.
5 and6
5.3.7 Surface coating In accordance with the product See applicable coatingQFive
standard or definition document specification
A See Tables
5 and 6
(continued)
8
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SIST EN 3818:2004
EN 3818:2003 (E)
Table 1 (continued)
a)
Clause Characteristic Requirement Inspection and test method Q/A Sample size
5.4 Mechanical A test sample shall be selected
properties from each diameter of bar, wire,
sheet or strip drawn from each
cast, and shall be heat treated
together with a production batch of
bolts
The sample selected shall be
sufficient to provide tensile test
pieces. The test pieces shall meet
the mechanical properties required
by the material standard.
On bolts: see ISO 7961
5.4.1 Tensile See Table 3 QFive
c)
strength
On test specimens :
The requirements generally apply
A See Tables
see ISO 6892.
on bolts however the requirements
The test specimens to be
apply to test specimens in the produced from the same
7 or 8.
material batch as the bolts and
following cases :
treated with them.
a) protruding head bolts of grip
length less than twice the nominal
shank diameter ;
b) countersunk head bolts of grip
length less than 2,5 times the
nominal shank diameter ;
c) threaded to head bolts of overall
length less than 3 times the
nominal shank diameter or bolts
having an overall length less than
18 mm ;
d) bolts with a thread length less
than 1,5 times the thread diameter
5.4.2 Tension fatigue Life: ISO 7961 QFive
d)
strength - mean value:
min. 65 000 cycles
A See Table 7.
- individual value:
min. 45 000 cycles
max.130 000 cycles
Frequency: 140 Hz max.
Loads : see Table 4.
5.4.3 Recess torque Removal torque as specified by The equipment used shall beQFive
the product standard or definition approved.
document, using the appropriate
A See Tables
driver with an end load of (45 –
2,5) N, without camout or
5 and 6
excessive distortion.
9
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