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 49.030.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Fri Apr 14 07:16:26 BST 2006, Uncontrolled Copy,
3、 (c) BSIBS EN 4458:2005This British Standard was published under the authority of the 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 i
4、n 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-referencesThe British Standards which implement internati
5、onal 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 t
6、o 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 any
7、 enquiries on the interpretation, or proposals for change, and keep UK interests informed; 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 b
8、ack cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Fri Apr 14 07:16:26 BST 2006, Uncontrolled Copy, (c) BSIEUROPEAN STANDARDNORME EUROPENNEEUR
9、OPISCHE NORMEN 4458November 2005ICS 49.030.20English VersionAerospace series - Studs, MJ threads, in titanium alloy TI-P64001, MoS2 coated, with serrated locking ring in corrosionresisting steel - Strength class: 1 100 MPa (at ambienttemperature) - Technical specificationSrie arospatiale - Goujons,
10、filetage MJ, en alliage detitane TI-P64001, revtus MoS2, avec bague deverrouillage dentele en acier rsistant la corrosion -Classe de rsistance : 1 100 MPa ( tempratureambiante) - Spcification techniqueLuft- und Raumfahrt - Stiftschrauben, MJ-Gewinde ausTitanlegierung TI-P64001, MoS2 beschichtet, mit
11、Ringsicherung aus korrosionsbestndigem Stahl -Festigkeitsklasse: 1 100 MPa (bei Raumtemperatur) -Technische LieferbedingungenThis European Standard was approved by CEN on 26 September 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for gi
12、ving 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 Central Secretariat or to any CEN member.This European Standard exists in three official versio
13、ns (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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cypru
14、s, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE
15、 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 reservedworldwide for CEN national Members.Ref. No. EN 4458:2005: ELicensed Copy: Wang Bin, na, Fri Apr 14 07:16:26 BST 2006, Uncontroll
16、ed Copy, (c) BSI2 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 4458:2005Licensed Copy: Wang Bin, na, Fri Apr 14
17、07:16:26 BST 2006, Uncontrolled Copy, (c) BSI3 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
18、 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 b
19、y May 2006, and conflicting national standards 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 r
20、ights. According 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, Lat
21、via, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 4458:2005Licensed Copy: Wang Bin, na, Fri Apr 14 07:16:26 BST 2006, Uncontrolled Copy, (c) BSI4 1 Scope This standard specifies the characteristics, qua
22、lification and acceptance requirements for studs with MJ threads in TI-P64001, MoS2coated, with serrated locking ring in corrosion resisting steel. Strength class: 1 100 MPa 1)It is applicable whenever referenced. 2 Normative references The following referenced documents are indispensable for the ap
23、plication 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. ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance qual
24、ity limit (AQL) for lot-by-lot inspection. ISO 3452, Non-destructive testing Penetrant inspection General principles. ISO 7961, Aerospace Bolts Test methods. EN ISO 4288, Geometrical Product Specifications (GPS) Surface texture: Profile method Rules and procedures for the assessment of surface textu
25、re (ISO 4288:1996) EN 2638, Aerospace series Aluminium alloy 2024-T3 extruded bar and section 1,2 (a or D) 150 mm with coarse 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 pro
26、cedure. 2)EN 9133, Aerospace series Quality management systems Qualification Procedure for aerospace standard parts. 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, produce
27、d from a 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 1) Minimum tensile strength of the material at ambient temperature. 2) Published
28、 as AECMA Prestandard at the date of publication of this standard. EN 4458:2005Licensed Copy: Wang Bin, na, Fri Apr 14 07:16:26 BST 2006, Uncontrolled Copy, (c) BSI5 3.2 Surface discontinuities 3.2.1 crack rupture in the material which may extend in any direction and which may be intercrystalline or
29、 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 temperature, unless otherwise specified 3.4 simple random sampling the taking of n items f
30、rom 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 to result in hazardous or unsafe conditions for individuals using, maintaining, or dependi
31、ng 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 materially the usability of the considered product for its intended purpose 3.7 minor defect
32、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 use or operation of this product 3.8 sampling plan a plan according to which one or more sam
33、ples 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 acceptable quality limit (AQL) a quality limit which in a sampling plan corresponds to a sp
34、ecified 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. EN 4458:2005Licensed Copy: Wang Bin, na, Fri Apr 14 07:16:26
35、BST 2006, Uncontrolled Copy, (c) BSI6 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 seating t
36、orque 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 4 Qu
37、ality 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 possibly be
38、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 inspe
39、ctions 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 requirement
40、s of this standard. EN 4458:2005Licensed Copy: Wang Bin, na, Fri Apr 14 07:16:26 BST 2006, Uncontrolled Copy, (c) BSI7 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 t
41、o be tested shall be selected by simple random sampling. Each stud 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,
42、 the number of studs 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 rep
43、ort showing actual numerical values shall be provided if specified in the purchase 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 o
44、r definition document Chemical analysis or certificate of compliance issued by the 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 Manu
45、facturing 5.3.1 Forging Q The equipment shall ensure a uniform temperature throughout 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
46、 shall not be heat treated more than twice. The equipment shall be approved. 5.3.3 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 4458:2005Licensed Copy: W
47、ang Bin, na, Fri Apr 14 07:16:26 BST 2006, Uncontrolled Copy, (c) BSI8 Table 1 (continued) Clause Characteristic Requirement Inspection and test method Q/A aSample size 5.3.4 EN ISO 4288 Q 5 Surface roughness In accordance with the product standard or definition document Visual examination A Tables
48、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 properties A test sample shall be selected from each diameter of bar, wire, sheet or strip drawn from each cast, and shall be heat treated
49、 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 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 parallel to the stud axis. Before failure, yield strength and elongati
