SIST EN 3899:2004
(Main)Aerospace series - Inserts, thickwall, self-locking, MJ threads, in heat resisting steel FE-PM3801 (17-4PH) - Technical specification
Aerospace series - Inserts, thickwall, self-locking, MJ threads, in heat resisting steel FE-PM3801 (17-4PH) - Technical specification
This standard specifies the characteristics, qualification and acceptance requirements for self-locking thickwall inserts with MJ threads, in FE-PM3801, for aerospace applications.
It is applicable whenever referenced.
Aerospace series - Inserts, thickwall, self-locking, MJ threads, in heat resisting steel FE-PM3801 (17-4PH) - Technical specification
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Inserts, thickwall, self-locking, MJ threads, in heat resisting steel FE-PM3801 (17-4PH) - Technical specificationAerospace series - Inserts, thickwall, self-locking, MJ threads, in heat resisting steel FE-PM3801 (17-4PH) - Technical specification49.030.30MaticeNutsICS:Ta slovenski standard je istoveten z:EN 3899:2003SIST EN 3899:2004en01-maj-2004SIST EN 3899:2004SLOVENSKI
STANDARD
SIST EN 3899:2004
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3899January 2003ICS 49.030.30English versionAerospace series - Inserts, thickwall, self-locking, MJ threads, inheat resisting steel FE-PM3801 (17-4PH) - TechnicalspecificationThis European Standard was approved by CEN on 2 June 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.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, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3899:2003 ESIST EN 3899:2004
EN 3899:2003 (E)2ContentspageForeword.31Scope.32Normative references.33Terms and definitions.44Quality assurance.65Requirements.6Annex A (normative)
Definition of test block.16A.1Test block in aluminium alloy.16A.2Test block in heat resisting steel.16Annex B (normative)
Assembly for rotational resistance test.17Annex C (normative)
Axial tensile strength test.18Annex D (normative)
Assembly for reusability test.19SIST EN 3899:2004
EN 3899:2003 (E)3ForewordThis document (EN 3899:2003) has been prepared by the European Association of Aerospace Manufacturers –Standardization (AECMA-STAN).After enquiries and votes carried out in accordance with the rules of this Association, this Standard has receivedthe approval of the National Associations and the Official Services of the member countries of AECMA, prior to itspresentation to CEN.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by July 2003, and conflicting national standards shall be withdrawn at the latest byJuly 2003.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries 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,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.1 ScopeThis standard specifies the characteristics, qualification and acceptance requirements for self-locking thickwallinserts with MJ threads, in FE-PM3801, for aerospace applications.It is applicable whenever referenced.2 Normative referencesISO 2859-1Sampling procedures for inspection by attributes – Part 1: Sampling schemes indexed byacceptance quality limit (AQL) for lot-by-Iot inspectionISO 3452Non-destructive testing – Penetrant inspection – General principlesISO 4288Geometrical Product Specifications (GPS) – Surface texture: Profile method – Rules andprocedures for the assessment of surface textureISO 5855-2Aerospace – MJ threads – Part 2: Limit dimensions for bolts and nutsISO 7481Aerospace – Nuts, self-locking, with maximum operating temperature less than or equal to425 °C –Test methodsEN 2638Aerospace series – Aluminium alloy 2024-T3 – extruded bar and section – 1,2 £ (a or D) £ 150mm with coarse peripheral grain control 1)EN 3042Aerospace series – Quality assurance - EN aerospace products – Qualification procedureEN 4014Aerospace series – Inserts, thickwall, self-locking – Design standard 1)EN 4015Aerospace series – Inserts, thickwall, self-locking – Installation and removal procedure 1)ASTM E112-96Standard Test Methods for Determining Average Grain Size 2)
1)Published as AECMA Prestandard at the date of publication of this standardSIST EN 3899:2004
EN 3899:2003 (E)43 Terms and definitionsFor the purposes of this standard, the following terms and definitions apply.3.1 batchquantity of finished thickwall inserts, of the same type and same diameter, produced from a material obtained fromthe same melt, manufactured in the course of the same production cycle, following the same manufacturing routeand having undergone all the relevant heat treatments and surface treatments3.2 Surface discontinuities3.2.1 crackrupture in the material which may extend in any direction and which may be intercrystalline or transcrystalline incharacter3.2.2 seamopen surface defect3.2.3 lapsurface defect caused by folding over metal fins or sharp corners and then compressing them into the surface3.2.4 inclusionsnon-metallic particles originating from the material manufacturing process. These particles may be isolated orarranged in strings.3.3 test temperatureambient temperature, unless otherwise specified3.4 simple random samplingthe taking of n items from a population of N items in such a way that all possible combinations of n items have thesame probability of being chosen3.5 critical defectdefect that, according to judgement and experience, is likely to result in hazardous or unsafe conditions forindividuals using, maintaining, or depending upon the considered product, or that is likely to prevent performance ofthe function of a major end item3.6 major defectdefect other than critical, that is likely to result in a failure or to reduce materially the usability of the consideredproduct for its intended purpose3.7 minor defect
2)Published by: American Society for Testing and Materials (ASTM), 1916, Race street, Philadelphia, PA 19103, USASIST EN 3899:2004
EN 3899:2003 (E)5defect that is not likely to reduce materially the usability of the considered product for its intended purpose, or thatis a departure from established specification having little bearing on the effective use or operation of this product3.8 sampling planplan according to which one or more samples are taken in order to obtain information and possibly to reach adecision3.9 limiting quality(sampling plan) the quality level which corresponds to a specified and relatively low probability of acceptanceNOTE 1 It is the limiting lot quality characteristic that the consumer is willing to accept with a low probabilitythat a lot of this quality would occur.NOTE 2 For the purposes of this Standard, the limiting quality quoted in table 4 corresponds to a probability ofacceptance of 10%.3.10 acceptance quality limitAQLmaximum per cent defective (or the maximum number of defects per hundred units) that, for purposes of samplinginspection can be considered satisfactory as a process averageNOTE Variant: quality limit which in a sampling plan corresponds to a specified but relatively high probability ofacceptance.3.11 finished thickwall insertthickwall insert ready for use, inclusive of any possible treatments and/or surface coatings, as specified in theproduct standard or definition document3.12 definition documentdocument specifying all the requirements for finished thick wall inserts3.13 self-locking torquetorque to be applied to the associated bolt to maintain its movement of rotation in relation to the thickwall insertassembly which is under no axial load and the insert locking zone being completely engaged with the bolt(minimum protrusion of two pitches, including the end chamfer)3.14 seating torquetightening torque to be applied to the thickwall insert and bolt assembly to introduce or to increase the axial load inthe assembly3.15 unseating torqueuntightening torque to be applied to the thickwall insert and bolt assembly to reduce or remove the axial load in theassemblySIST EN 3899:2004
EN 3899:2003 (E)63.16 breakaway torquetorque required to start unscrewing the associated bolt with respect to the installed thickwall insert, with the insertlocking zone still fully engaged on the bolt, but after the axial load in the assembly has been removed byunscrewing half a turn followed by a halt in rotational movement4 Quality assurance4.1 QualificationEN 3042Qualification inspections and tests (requirements, methods, numbers of thickwall inserts) are specified in table 1.They shall be carried out on:- each type and diameter of thickwall inserts;- 44 thick wall inserts selected from a single batch by simple random sampling.The test programme may possibly be reduced, or the qualification be granted without inspection or testing :any such decision shall be based on the results obtained on similar types and diameters of thickwall insertsprovided that the design and manufacturing conditions are identical.Table 2 indicates the allocation of thickwall insert samples for the inspections and tests.4.2 Acceptance4.2.1 PurposeThe purpose of acceptance inspections and tests is to check, as simply as possible, by a method representative ofactual use conditions, with the uncertainty inherent to statistical sampling, that the thickwall inserts constituting thebatch satisfy the requirements of this standard.4.2.2 ConditionsAcceptance inspections and tests (requirements, methods, numbers of thick wall inserts) are specified in table 1.They shall be carried out on each batch. Thickwall inserts from the batch to be tested shall be selected by simplerandom sampling.Each thickwall insert 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 beperformed during the acceptance inspections and tests. In this case, the number of thickwall inserts submitted tothese inspections and tests is the same as that submitted for qualification inspection and tests.4.2.3 ResponsibilityAcceptance inspections and tests shall be carried out by the manufacturer, or under his responsibility.4.2.4 Inspection and test reportA test report showing actual numerical values shall be provided if specified in the purchase order.5 RequirementsSee table 1.SIST EN 3899:2004
EN 3899:2003 (E)7Table 1 – Technical requirements and test methodsClauseCharacteristicRequirementInspection and test methodQ/A aSample sizeQ5.1MaterialIn accordance with the productstandard or definition documentChemical analysis or certificate ofcompliance issued by themanufacturer of the semi-finishedproductAQ445.2Dimensions,tolerances andtolerances ofform andpositionIn accordance with the productstandard or definition documentStandard gaugingATables 3 and 45.3ManufacturingQ5.3.1ProcessInserts may be manufactured bymachining or forming.Manufacturing method shall beindicated.Q5.3.2Heat treatmentThe heat treatment medium oratmosphere shall not cause anysurface contamination.Any scale which will not beremoved by subsequentmachining shall be removed byabrasive blasting, with anappropriate equipment.The blanks shall be solutiontreated at a temperature of1 025 °C to 1 055 °C, held at theselected temperature within ± 15°C for 4 h ± 15 min quench in oil,or alternative, or faster.The solution treated blanks shallbe precipitation heat treated at(540 ± 5) °C, held at thistemperature for 4 h ± 15 min andair cooled or faster.Calibration of the heat treatmentequipment shall be confirmed.Visual examinationExamination of the heat treatmentspecificationQ44ATables 3 and 45.3.3Thre
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