1、BRITISH STANDARD AEROSPACE SERIESBS EN 4458:2005Studs, MJ threads, in titanium alloy TI-P64001, MoS2 coated, with serrated locking ring in corrosion resisting steel Strength class: 1 100 MPa (at ambient temperature) Technical specificationThe European Standard EN 4458:2005 has the status of a Britis
2、h StandardICS 49.030.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 4458:2005This British Standard was published under the authority of the
3、 Standards Policy and Strategy Committee on 20 January 2006 BSI 20 January 2006ISBN 0 580 47226 4National forewordThis British Standard is the official English language version of EN 4458:2005.The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners an
4、d fastening systems, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Ca
5、talogue 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 to include all the necessary provisions of a contract. Users are responsible for its c
6、orrect 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 any enquiries on the interpretation, or proposals for change, and keep UK interests info
7、rmed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 18, an inside back cover and a back cover.The BSI copyright notice displayed in this document indica
8、tes when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 4458November 2005ICS 49.030.20English VersionAerospace series - Studs, MJ threads, in titanium alloy TI-P64001, MoS2 coated, with serrated locking ring in
9、corrosionresisting steel - Strength class: 1 100 MPa (at ambienttemperature) - Technical specificationSrie arospatiale - Goujons, filetage MJ, en alliage detitane TI-P64001, revtus MoS2, avec bague deverrouillage dentele en acier rsistant la corrosion -Classe de rsistance : 1 100 MPa ( tempratureamb
10、iante) - Spcification techniqueLuft- und Raumfahrt - Stiftschrauben, MJ-Gewinde ausTitanlegierung TI-P64001, MoS2 beschichtet, mitRingsicherung aus korrosionsbestndigem Stahl -Festigkeitsklasse: 1 100 MPa (bei Raumtemperatur) -Technische LieferbedingungenThis European Standard was approved by CEN on
11、 26 September 2005.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
12、 be obtained on application to the Central Secretariat 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 Centra
13、l Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
14、 Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reserv
15、edworldwide for CEN national Members.Ref. No. EN 4458:2005: E2 Contents Page Foreword 3 1 Scope .4 2 Normative references .4 3 Terms and definitions.4 4 Quality assurance .6 5 Requirements 7 Annex A (normative) Definition of test block.16 Annex B (normative) Assembly for mechanical tests .17 EN 4458
16、:20053 Foreword This European Standard (EN 4458:2005) 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 received the approval of the Nation
17、al 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 May 2006, and conflicting national sta
18、ndards shall be withdrawn at the latest by May 2006. 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 Inte
19、rnal 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, Lithuania, Luxembourg, Malta, Nethe
20、rlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 4458:20054 1 Scope This standard specifies the characteristics, qualification and acceptance requirements for studs with MJ threads in TI-P64001, MoS2coated, with serrated locking ring in corr
21、osion resisting steel. Strength class: 1 100 MPa 1)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
22、of the referenced 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-lot inspection. ISO 3452, Non-destructive testing Penetrant inspection General principles. ISO 796
23、1, Aerospace Bolts Test methods. EN ISO 4288, Geometrical Product Specifications (GPS) Surface texture: Profile method Rules and procedures for the assessment of surface texture (ISO 4288:1996) EN 2638, Aerospace series Aluminium alloy 2024-T3 extruded bar and section 1,2 (a or D) 150 mm with coarse
24、 peripheral grain control. 2)EN 4460, Aerospace series Studs, in titanium alloy TI-P64001, with serrated locking ring in corrosion resisting steel Installation and removal procedure. 2)EN 9133, Aerospace series Quality management systems Qualification Procedure for aerospace standard parts. 3 Terms
25、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 a material obtained from the same melt, manufactured in the course of the same production cycle, following the same ma
26、nufacturing route and having undergone all the relevant heat treatments and surface treatments 1) Minimum tensile strength of the material at ambient temperature. 2) Published as AECMA Prestandard at the date of publication of this standard. EN 4458:20055 3.2 Surface discontinuities 3.2.1 crack rupt
27、ure in the material which may extend in any direction and which may be intercrystalline or transcrystalline in character 3.2.2 seam open surface defect 3.2.3 lap surface defect caused by folding over metal fins or sharp corners and then compressing them into the surface 3.3 test temperature ambient
28、temperature, unless otherwise specified 3.4 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 3.5 critical defect a defect that, according to judgement and experience, is likely
29、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 3.6 major defect a defect other than critical, that is likely to result in a failure or to reduce mat
30、erially the usability of the considered product for its intended purpose 3.7 minor defect a 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 us
31、e or operation of this product 3.8 sampling plan a plan according to which one or more samples are taken in order to obtain information and possibly to reach a decision 3.9 limiting quality in a sampling plan, the quality limit which corresponds to the specified 10 % probability of acceptance 3.10 a
32、cceptable 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 cent defective (or the maximum number of defects per hundred units) that, for purposes of sampling inspection can be considered satisf
33、actory as a process average. EN 4458:20056 3.11 finished stud a stud ready for use, inclusive of any possible treatments and/or surface coatings, as specified in the product standard or definition document 3.12 definition document document specifying all the requirements for finished studs 3.13 seat
34、ing torque the tightening torque to be applied to the thin wall insert and bolt assembly to introduce or to increase the axial load in the assembly 3.14 unseating torque the untightening torque to be applied to the thin wall insert and bolt assembly to reduce or remove the axial load in the assembly
35、 4 Quality assurance 4.1 Qualification EN 9133 Qualification inspections and tests (requirements, methods, numbers of studs) are specified in Table 1. They shall be carried out on: each diameter of studs; 25 studs selected from a single batch by simple random sampling. The test programme may possibl
36、y 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 studs provided that the design and manufacturing conditions are identical. Table 2 indicates the allocation of stud samples for the
37、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 studs constituting the batch satisfy the requir
38、ements of this standard. EN 4458:20057 4.2.2 Conditions Acceptance inspections and tests (requirements, methods, numbers of studs) are specified in Table 1. They shall be carried out on each batch. Studs from the batch to be tested shall be selected by simple random sampling. Each stud may be submit
39、ted 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 studs submitted to these inspections and tests is the same as tha
40、t 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 purcha
41、se order. 5 Requirements See Table 1. Table 1 Technical requirements and test methods Clause Characteristic Requirement Inspection and test method Q/A aSample size 5.1 Material Q In accordance with the product standard or definition document Chemical analysis or certificate of compliance issued by t
42、he manufacturer of the semi-finished product A 5.2 Standard gauging Q 20 Dimensions, tolerances and tolerances of form and position In accordance with the product standard or definition document A Tables 3 and 4 5.3 Manufacturing 5.3.1 Forging Q The equipment shall ensure a uniform temperature throu
43、ghout the batch. According to the route of manufacture A 5.3.2 Q Heat treatment The forged blanks shall be heat treated to produce the properties required by the definition document. According to process control A Blanks shall not be heat treated more than twice. The equipment shall be approved. 5.3
44、.3 Threads Q 5 Formed by a single rolling process after full heat treatment. Threads dimensions and geometry requirements are specified in 5.2. According to the route of manufacture continued EN 4458:20058 Table 1 (continued) Clause Characteristic Requirement Inspection and test method Q/A aSample s
45、ize 5.3.4 EN ISO 4288 Q 5 Surface roughness In accordance with the product standard or definition document Visual examination A Tables 3 and 4 5.3.5 Q 5 Surface coating In accordance with the product standard or definition document See applicable coating standard. A Tables 3 and 4 5.4 Mechanical pro
46、perties A test sample shall be selected from each diameter of bar, wire, sheet or strip drawn from each cast, and shall be heat treated together with a production batch of studs. The test pieces are used for tensile, creep and tension fatigue strength tests when the stud have a total length smaller
47、than three times its diameter or smaller than 20 mm. The test pieces and studs shall meet the mechanical properties required by the material standard. Annex B Q 5 5.4.1 Tensile strength The test shall be carried out on finished studs or on test pieces. The test assembly must allow a tensile load par
48、allel to the stud axis. Before failure, yield strength and elongation are measured.A Table 5 Annex B Q 5 ISO 7961 A Table 5 5.4.2 Tension fatigue strength Requirements in accordance with 5.4.1. Life: mean value: min. 65 000 cycles individual value: min. 45 000 cycles max. 130 000 cycles Frequency: 1
49、40 Hz max. Loads: see Table B.2. If the fatigue strength life is less than 65 000 cycles, the failure shall be situated in threads. If failure occurs starting at 65 000 cycles, it shall be situated either in threads or in the fillet groove. Annex B Q 5 5.4.3 Rotational resistance The studs installed into test blocks shall withstand the minimum torque specified in Table B.1. continued EN 4458:20059 Table 1 (continued) Clause Characteristic Requirement Inspection and test method Q/A aSample size 5.5 Metallurgical properties
