1、BRITISH STANDARDBS EN 2941:2008Aerospace series Nickel alloy rivets Technical specificationICS 49.030.60g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g3
2、6g58BS EN 2941:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2008 BSI 2008ISBN 978 0 580 62751 4National forewordThis British Standard is the UK implementation of EN 2941:2008.The UK participation in its preparation was entrust
3、ed to Technical Committee ACE/12, Aerospace fasteners and fastening systems.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct
4、 application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 2941March 2008ICS 49.030.60English VersionAerospace series - Nickel alloy rivets - Technical spec
5、ificationSrie arospatiale - Rivets en alliage de nickel -Spcification techniqueLuft- und Raumfahrt - Niete aus Nickellegierung -Technische LieferbedingungenThis European Standard was approved by CEN on 12 December 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which s
6、tipulate 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 CEN Management Centre or to any CEN member.This European Standard
7、 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 CEN Management Centre has the same status as theofficial versions.CEN members are the national standards
8、 bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.E
9、UROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2941:2008: E2 Contents Page
10、Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Required characteristics.5 5 Filing of documents.10 6 Certificate of conformity .10 BS EN 2941:20083 Foreword This document (EN 2941:2008) has been prepared by the Aerospace and Defence Industries Association of Europe - Stand
11、ardization (ASD-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 ASD, prior to its presentation to CEN. This European Standard shall
12、 be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2008, and conflicting national standards shall be withdrawn at the latest by September 2008. Attention is drawn to the possibility that some of the elements of this d
13、ocument 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 Standar
14、d: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS
15、 EN 2941:20084 1 Scope This standard specifies the performance and test requirements for solid rivets in the nickel alloys quoted below, intended for aerospace applications. It applies wherever it is specified in the document defining the rivet. Its use, after agreement between the customer and the
16、supplier, for solid rivets made from other materials, requires determination, case by case, of the minimum tensile and double shear loads. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited ap
17、plies. 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. EN 2002-001, Aerospace series Me
18、tallic materials Test methods Part 001: Tensile testing at ambient temperature. EN 2002-7, Aerospace series Metallic materials Test methods Part 7: Hardness test. 1)EN 2305 2), Nickel base alloy NI-P11 540 MPa Rm 620 MPa Bars and wires for rivets Aerospace series. 3)EN 3238, Aerospace series Metalli
19、c materials Test method Shear test for wires and rivets. 4)EN 4371, Aerospace series Heat resisting alloy NI-PD9001 (NiCu31) Non heat treated Bar for rivets D 10 mm. 1)EN 4372, Aerospace series Heat resisting nickel alloy with copper NI-PD9001 (NiCu31) Wire for solid rivets D 10 mm. 1)3 Terms and de
20、finitions For the purposes of this document, the following terms and definitions apply. 3.1 batch for all tests, inspections and supplies, a batch of rivets is defined as follows: finished rivets of the same form, diameter and length, manufactured by the same process, made from one material, batch f
21、rom the same heat treatment furnace with the same surface treatment, and deriving from the same wire coil and the same place of manufacture The maximum mass of each batch is limited to 25 kg. 1) Published as ASD Prestandard at the date of publication of this standard. 2) Inactive for new designation
22、, see EN 4371 and EN 4372. 3) Published as ASD Standard at the date of publication of this standard. 4) In preparation at the date of publication of this standard. BS EN 2941:20085 3.2 rivet wire samples for the test, each rivet batch shall be accompanied by rivet wire samples taken from each end of
23、 the coil used to manufacture the batch. The samples shall be submitted to the same heat treatment as the rivets of that batch 3.3 rivet samples rivet samples intended for tests shall be chosen at random from each batch 4 Required characteristics The rivets shall conform with the requirements of the
24、 document defining the rivet and those prescribed in Table 1. Inspections and tests are to be carried out by the rivet manufacturer. Table 1 Technical requirements and test methods Subclause Characteristics Technical requirements Inspection and test methods Number of samples 4.1 Materials Shall conf
25、orm with the requirements of the material standard quoted in the document defining the rivet. See material specification. 4.2 Dimensions Shall conform with the requirements of the document defining the rivet. Methods are at manufacturers option. In case of dispute the projection method will be used
26、as the reference method, using 25 magnification for diameters up to 6 mm and 10 for greater diameters. This inspection shall be carried out at three equidistant points around the rivet. Table 2 4.3 Heat treatment Shall conform with the condition of use defined in the material standard. See 4.5. 4.4
27、Surface treatment Shall be in conformity with the defining document Methods are at manufacturers option. 4.5 Mechanical properties Shall be checked either by a double shear test or by a tensile test combined with a hardness test. 4.5.1 Double shear Non-assembled rivets (i.e. without post-formed head
28、) shall conform with the values specified in Table 4. See EN 3238. If the rivets are not long enough for the double shear test, it shall be carried out on the wire samples. Table 3 4.5.2 Tension Rivet wire samples shall conform with the values specified in Table 5. See EN 2002-001. Table 3 continued
29、 BS EN 2941:20086 Table 1 Technical requirements and test methods (continued) Subclause Characteristics Technical requirements Inspection and test methods Number of samples 4.5.3 Hardness Hardness values for rivet wire samples shall conform with the requirements of the corresponding material standar
30、d. Hardness values for rivets shall correspond with the rivet hardness values within a tolerance of 5 %. Refer to EN 2002-7. Table 3 4.5.4 Upset test After upset the head of the rivets shall be free from cracks or folds when viewed at a magnification of 10. Rivets shall be placed in a test fixture s
31、ubstantially conforming to Figure 1a). The free end of the rivet shall be upset using a flat tool to obtain a head conforming to the requirements of Figure 1b). Table 3 This test to be performed only at the request of the purchaser 4.6 Surface condition, appearance Rivets shall be free from seams, b
32、urrs, laps, crevices, incrustations clefts, tooling marks, scores, cracks and other defect prejudicial to the use of the rivet. Rivets shall be examined visually with or without magnification. Magnification is limited to 6. Table 2 4.7 Identification and marking Each rivet shall be marked in conform
33、ity with the defining document, except for particular indications requested by the customer. No sharp edges or other defect detrimental to the correct setting of the rivet shall be present. Visual examination. 4.8 Packaging Rivets shall be delivered in strong and durable packages, capable of protect
34、ing them from physical and corrosive deterioration. Any particular or additional packaging requirements shall be specified in the order. If the rivets delivered come from different batches, each batch shall be packed and identified separately. Unless particularly specified in the order, the number o
35、f rivets in the same package is left to the manufacturers discretion. However, maximum mass is 25 kg. A copy of the manufacturers delivery note relating to the rivet batch shall be included in the package but may, on the other band, be sent separately on request. continued BS EN 2941:20087 Table 1 T
36、echnical requirements and test methods (concluded) Subclause Characteristics Technical requirements Inspection and test methods Number of samples 4.9 Labelling Durable external labels on the package shall contain the following information: Identity block of the standard rivet; Quantity (mass or numb
37、er of rivets); Customers order number; Manufacturers identification, name and address; Number of manufacturers delivery note; Manufacturers batch number; Manufacturers inspection stamp. Labels attached to a secondary package shall include the following information as a minimum: Identity block of the
38、 rivet; Quantity; Batch number; Inspection stamp. Table 2 Sampling plan and acceptance level 5)non-destructive tests Number of rivets in the batch Number of rivets to be taken for the sampling batch Maximum number of defective rivets in the sampling batch which permit acceptance of the batcha151 to
39、280 32 3 281 to 500 50 5 501 to 1 200 80 7 1 201 to 3 200 125 10 3 201 to 10 000 200 14 10 001 to 35 000 315 21 35 001 to 150 000 500 21 aDefective rivets shall not be returned to the batch. 5) Sampling plan for normal inspection to ISO 2859-1 (AQL = 4 %). BS EN 2941:20088 Table 3 Sampling plan and
40、rejection levels destructive tests Number of rivets in the batch Number of rivets to be taken for the sampling batch Number of defective rivets which lead to rejection of the batcha151 to 280 5 1 281 to 500 5 1 501 to 1 200 5 1 1 201 to 3 200 8 1 3 201 to 10 000 8 1 10 001 to 35 000 8 1 35 001 to 15
41、0 000 13 1 aIf the reason for rejection results from the method of operating the test apparatus or from faulty heat treatment which can be rectified in a satisfactory manner, the tests may be repeated after elimination of the cause. A note to this effect shall be added to the corresponding inspectio
42、n documents. Table 4 Shear strength Minimum breaking load in double shear N Nominal rivet diameter mm EN 2305 Rc340 MPa 1,6 1 280 2,4 2 953,2 5 300 4,0 6 294,8 11 950 5,6 16 330 6,4 21 400 8,0 33 330 9,6 48 200 BS EN 2941:20089 Table 5 Tensile strength Minimum tensile breaking load N Nominal rivet d
43、iameter mm EN 2305 Rc540 MPa 1,6 1 020 2,4 2 343,2 4 200 4,0 6 584,8 9 490 5,6 12 970 6,4 16 990 8,0 26 470 9,6 38 275 a) Before upset b) After upset Key 1 Test material hardness HRC 50-55 Figure 1 Upset test BS EN 2941:200810 5 Filing of documents For each batch, the manufacturer shall keep documen
44、tation stating at least: relationship between the rivet wire material batch and the rivet batch; a copy of the documents concerning the rivet wire material batch and the test references; heat treatment documents for the rivet batch; documents concerning the rivet batch inspections and tests; the fin
45、al inspection certificate. These documents and alI associated references shall be kept on file for at least three years, and available for despatch to the customer at his request, within that period. 6 Certificate of conformity The rivet manufacturer shall supply to the customer, no later than the d
46、elivery of the product, a final inspection certificate to confirm that the product conforms with all the requirements of this specification. BS EN 2941:2008blankBS EN 2941:2008BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for p
47、reparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editi
48、ons.It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the insi
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