BS-EN-4458-2005.pdf

BRITISH STANDARD AEROSPACE SERIES BS EN 4458:2005 Studs, 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 specification The European Standard EN 4458:2005 has the status of a British Standard ICS 49.030.20 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:47:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 4458:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 20 January 2006 © BSI 20 January 2006 ISBN 0 580 47226 4 National foreword This 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 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 international 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 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 any 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 pages This 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 indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:47:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 4458 November 2005 ICS 49.030.20 English Version Aerospace series - Studs, 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 specification Série aérospatiale - Goujons, filetage MJ, en alliage de titane TI-P64001, revêtus MoS2, avec bague de verrouillage dentelée en acier résistant à la corrosion - Classe de résistance : 1 100 MPa (à température ambiante) - Spécification technique Luft- und Raumfahrt - Stiftschrauben, MJ-Gewinde aus Titanlegierung TI-P64001, MoS2 beschichtet, mit Ringsicherung aus korrosionsbeständigem Stahl - Festigkeitsklasse: 1 100 MPa (bei Raumtemperatur) - Technische Lieferbedingungen This 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 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 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 translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. 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, Portugal, Slovakia, Slovenia, 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 © 2005 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4458:2005: E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:47:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 Contents Page Foreword 3 1 Scope.4 2 Normative references .4 3 Terms and definitions.4 4 Quality assurance.6 5 Requirements7 Annex A (normative) Definition of test block.16 Annex B (normative) Assembly for mechanical tests.17 EN 4458:2005 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:47:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 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 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 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 rights. 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, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 4458:2005 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:47:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 1 Scope This standard specifies the characteristics, qualification and acceptance requirements for studs with MJ threads in TI-P64001, MoS2 coated, 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 application 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 quality 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 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 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 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 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 as AECMA Prestandard at the date of publication of this standard. EN 4458:2005 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:47:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5 3.2 Surface discontinuities 3.2.1 crack rupture 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 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 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 materially 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 use 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 acceptable 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 satisfactory as a process average. EN 4458:2005 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:47:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 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 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 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 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 studs provided that the design and manufacturing conditions are identical. Table 2 indicates the allocation of stud samples for the 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 requirements of this standard. EN 4458:2005 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:47:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 7 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 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, 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 report 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 a Sample size 5.1 Material Q In accordance with the product standard or 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 Manufacturing 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 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 4458:2005 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:47:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 8 Table 1 (continued) Clause Characteristic Requirement Inspection and test methodQ/A a Sample size 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 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 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 fi