1、BRITISH STANDARD AEROSPACE SERIES BS EN 3899:2004 Inserts, thickwall, self-locking, MJ threads, in heat resisting steel FE-PM3801 (17-4PH) Technical specification The European Standard EN 3899:2004 has the status of a British Standard ICS 49.030.30 BS EN 3899:2004 This British Standard was published
2、 under the authority of the Standards Policy and Strategy Committee on 16 December 2004 BSI 16 December 2004 ISBN 0 580 45111 9 National foreword This British Standard is the official English language version of EN 3899:2004. It supersedes BS EN 3899:2003, which is withdrawn. The UK participation in
3、 its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement internat
4、ional or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport
5、 to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee a
6、ny enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 23 and
7、a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN3899 November2004 ICS49.030.30 SupersedesEN3899:2003 Englishversion Aerospaceserie
8、sInserts,thickwall,selflocking,MJthreads,in heatresistingsteelFEPM3801(174PH)Technical specification SriearospatialeDouillesfiletes,paroirenforce, freinageinterne,filetageMJ,enacierrsistantchaud FEPM3801(174PH)Spcificationtechnique LuftundRaumfahrtGewindeeinstze,dickwandig, selbstsichernd,MJGewinde,
9、aushochwarmfestemStahl FEPM3801(174PH)TechnischeLieferbedingungen ThisEuropeanStandardwasapprovedbyCENon11September2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatel
10、istsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlangua
11、geandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal
12、, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.
13、No.EN3899:2004:EEN 3899:2004 (E) 2 Contents Page Foreword3 1 Scope4 2 Normative references4 3 Terms and definitions .4 4 Quality assurance6 4.1 Qualification.6 4.2 Acceptance.7 4.2.1 Purpose.7 4.2.2 Conditions7 4.2.3 Responsibility7 4.2.4 Inspection and test report.7 5 Requirements.7 Annex A (normat
14、ive) Definition of test block .16 Annex B (normative) Assembly for rotational resistance test .18 Annex C (normative) Axial tensile strength test20 Annex D (normative) Assembly for reusability test.22 EN 3899:2004 (E) 3 Foreword This document (EN 3899:2004) has been prepared by the European Associat
15、ion of Aerospace Manufacturers - Standardization (AECMA-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 AECMA, prior to its present
16、ation 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 May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. This document supersedes EN 3899:2003. Acco
17、rding to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithua
18、nia, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 3899:2004 (E) 4 1 Scope This standard specifies the characteristics, qualification and acceptance requirements for self-locking thickwall inserts with MJ threads, in F
19、E-PM3801, for aerospace applications. It is applicable whenever referenced. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the refere
20、nced document (including any amendments) applies. ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-Iot inspection ISO 3452, Non-destructive testing Penetrant inspection General principles ISO 4288, Geometrical
21、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 7481, Aerospace Nuts, self-locking, with maximum operating temperature less than or equal to 425 C
22、Test methods EN 2638, Aerospace series Aluminium alloy 2024-T3, extruded bar and section 1,2 (a or D) 150 mm with coarse peripheral grain control 1)EN 3906, Aerospace series Martensitic corrosion resisting steel FE-PM3801 Air melted Solution treated Bar D 50 mm For the manufacture of fasteners 1 100
23、 MPa R m 1 300 MPa 1)EN 4014, Aerospace series Inserts, thickwall, self-locking Design standard EN 4015, Aerospace series Inserts, thickwall, self-locking Installation and removal procedure EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts 1)AS
24、TM E112-96, Standard Test Methods for Determining Average Grain Size 2)3 Terms and definitions For the purposes of this standard, the following terms and definitions apply. 3.1 batch quantity of finished parts, of the same type and same diameter, produced from the same material obtained from the sam
25、e 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 1) Published as AECMA Prestandard at the date of publication of this standard 2) Published by: American Society for Tes
26、ting and Materials (ASTM), 1916, Race street, Philadelphia, PA 19103, USA EN 3899:2004 (E) 5 3.2 Inspection lot quantity of parts from a single production batch with the same part number which completely defines the part 3.3 Surface discontinuities 3.3.1 crack rupture in the material which may exten
27、d in any direction and which may be intercrystalline or transcrystalline in character 3.3.2 seam open surface defect 3.3.3 lap surface defect caused by folding over metal fins or sharp corners and then compressing them into the surface 3.3.4 inclusions non-metallic particles originating from the mat
28、erial manufacturing process. These particles may be isolated or arranged in strings. 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 sam
29、e 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 majo
30、r 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 inten
31、ded 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 (LQ
32、 10 ) in a sampling plan, the quality limit which corresponds to a specified 10 % probability of acceptance EN 3899:2004 (E) 6 3.11 acceptance quality limit (AQL) a quality limit which in a sampling plan corresponds to a specified but relatively high probability of acceptance It is the maximum per c
33、ent 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 thickwall insert thickwall insert ready for use, inclusive of any possible treatments and/or surface coatings, as specified
34、in the product standard or definition document 3.13 definition document document specifying all the requirements for finished thick wall inserts 3.14 self-locking torque torque to be applied to the associated bolt to maintain its movement of rotation in relation to the thickwall insert assembly whic
35、h 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) 3.15 seating torque tightening torque to be applied to the thickwall insert and bolt assembly to introduce or to increase the axial load in the a
36、ssembly 3.16 unseating torque untightening torque to be applied to the thickwall insert and bolt assembly to reduce or remove the axial load in the assembly 3.17 breakaway torque torque required to start unscrewing the associated bolt with respect to the installed thickwall insert, with the insert l
37、ocking zone still fully engaged on the bolt, but after the axial load in the assembly has been removed by unscrewing half a turn followed by a halt in rotational movement 4 Quality assurance 4.1 Qualification EN 9133 Qualification inspections and tests (requirements, methods, numbers of thickwall in
38、serts) 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 suc
39、h decision shall be based on the results obtained on similar types and diameters of thickwall inserts provided that the design and manufacturing conditions are identical. Table 2 indicates the allocation of thickwall insert samples for the inspections and tests. EN 3899:2004 (E) 7 4.2 Acceptance 4.2
40、.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 thickwall inserts constituting the batch satisfy the requirements of this standard. 4.2.
41、2 Conditions Acceptance 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 simple random sampling. Each thickwall insert may be submitted to
42、 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 inspections and tests. In this case, the number of thickwall inserts submitted to these inspections and tests is the same a
43、s 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 p
44、urchase order. 5 Requirements See Table 1. EN 3899:2004 (E) 8 Table 1 Technical requirements and test methods Clause Characteristic Requirement Inspection and test method Q/A aSample size Q 5.1 Material In accordance with the product standard or definition document Chemical analysis or certificate o
45、f conformity issued by the manufacturer of the semi-finished product A Q 44 5.2 Dimensions, tolerances and tolerances of form and position In accordance with the product standard or definition document Standard gauging A Tables 3 and 4 5.3 Manufacturing Q 5.3.1 Process Inserts may be manufactured by
46、 machining or forming. Manufacturing method shall be indicated. Q The heat treatment medium or atmosphere shall not cause any surface contamination. Calibration of the heat treatment equipment shall be confirmed. Any scale which will not be removed by subsequent machining shall be removed by abrasiv
47、e blasting with an appropriate equipment. Visual examination 5.3.2 Heat treatment The blank shall be solution treated at a temperature of 1 025 C to 1 055 C, hold at the selected temperature within 15 C for 4 h 15 min and oil quench or equivalent or faster. The solution treated blanks shall be preci
48、pitation heat treated at (540 5) C, held at this temperature for 4 h 15 min, and air cooled or faster. Examination of the heat treatment specification 5.3.3 Q 44 Thread deformation Threads in the locking zone may be deformed in any manner provided that the insert meets the requirements of this standard. The finished inserts shall allow the “GO“ thread plug gauge to enter a minimum of one turn, when gauged from the counterbore side before engagement of the
