1、A. E.C. M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM Edition approved for publication . 18 January 1988 prEN 2941 Issue P 1 January 1988 Comments should be sent within six months C3 Chairman after the date of publication decision A.E.C.M.A. 88, Bd. Malesherbes Mr. ARENA 75008 PARIS - FRANCE DIT
2、PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boulevard Malesherbes, 75008 PARIS -TL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Nickel alloy rivets Technical specification Srie arospatiale Rivets en alliage de nickel Spcification technique Luft- und Raum
3、fahrt Niete aus Nickellegierung Technische Lieferbedingungen This derospace Series pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is pubiished on green paper for the needs of AECMA-Members. It has been technically
4、approved by the experts of the concerned AECMA Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shallnot be changed to an extent that interchahgeability is affected, physically or functionally, without re-identification o
5、f the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for final vote. Copyright Association Eu
6、ropeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,- I prEN2941 Page 3 AECMA PRENZLiL 88 m 101123LL OOQLi_C4L T m 1 Scope and field of application This standard specifies the perf
7、ormance and test requirements for solid rivets in the nickel alloys quoted belowp intended for aerospace application. It applies wherever it is specified in the document defining the rivet. Its use, after agreement between the customer and the supplier, for solid rivets made from other materials, re
8、quires determination, case by case, of the minimum tensile and double shear loads. 2 References IS0 2859, Sampling procedures and tables for inspection by attributes EN2OO2-1, Aerospace series - Test methods for metallic materials - Part 1 : Tensile testing at ambient temperature 1) EN2802-9, Aerosp
9、ace serfes - Test methods for metallic materials - Part 7 : Hardness test 1) EN2002-8, Aerospace series - Test methods for metallic materials - Part 8 : Micrographic determination of grain size 1) EN2305, Nickel base alloy NI-Pl1 - 540 MPa - roperties Iouble shear Non-assembled rivets (i.e. without
10、post-formed head) shall conform with the values specific in table 4. Table 3 See EN3238. If the rivets are not long enough for the double shear test, it shall be carried out on the wire samples, 5.1 5.2 5.3 See EN2002-E. Yension Rivet wire samples shall confom with the values specified In table 5. R
11、efer to EN2002-7 Table 3 Iardness Hardness values for rivet wire samples shall conform with the requirements of the corresponding material standard. Hardness values for rivets shall corres- pond with the rivet hardness values within a tolerance of 25%, After upset the head of the rivets shall be fre
12、e from cracks or folds when viewed at a magnification of X10. Table 3 chis test to be per- mied only at the request of the Purchaser 5.4 - Jpset test Rivets shall be placed in a test fixture substantially conforming to Fig la. The free end of the rivet shall be upset using a flat tool to obtain a he
13、ad conforming to the requirements of Fig. lb. 0252HR0787T4 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN2941 AA 1012311 0004543 3 prEN2941
14、 Page 5 Table 1 - Technical requirements and test methods (Contd) Characteristics urface condition, ppearance dentification nd marking ackaging .abelling Technical requirements Inspection and test methods Rivets shall be free from seams, )urrs, laps, crevices, incrusta- tions, clefts, tooling marks,
15、 scores, cracks tain the following information : - Identity block of the standard rivet - Quantity (mass or number of rivets) - Customers order number - Manufacturers identitication, name and address - Number of manufacturers delivery note - Manufacturers batch number - tnuEclctarers inspection stmp
16、 Labels attached to a secondary package shall include the following information as a minimum : - Identity block of the rivet - Quantity - Batch number - Inspection stamp. 0252MR0787T4 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANo
17、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN2941 88 m 1012311 0004544 5 m prEN2941 Page 6- Table 2 - Sampling plan and acceptance level 1) non-destructive tests Number. of rivets in the batch 151 to 288 281 to 500 501 to 1200 1201 to 3260 3201 to 10000
18、10001 to 35000 35001 to 150000 Number of rivets to be taken for the sampling batch 32 50 80 125 280 315 500 Max. number.of defective rivets in the sampling batch which permit acceptance of the batch 2) 3 5 7 10 14 21 21 1) Sampling plan for.normal inspection to IS0 2859 (NQA = 4 X) 2) Defective rive
19、ts shall not be returned to the batch. Table 3 - Sampling plan and rejection levels destructive tests Number. of rivets in the batch 151 to 280 281 to 500 501 to 1200 1201 to 3200 3201 to i0000 10001 to 35000 35001 to 150000 1) If the reason for-r Number of rivets to be taken for the sampling batch.
20、 8 13 Number of defective rivets which lead to rejection of the batch 1) jection 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 shal
21、l be added to the corresponding inspection documents. 0252MRCI787T4 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN2741 88 m 1012311 0004545
22、 7 m I - prEN2941 Page 7 Table 4 - Shear strength Nominal rivet diameter in mm. Minimum breaking load in double shear (NI EN2305 Rc 340 MPa 1280 2950 5300 6290 11950 16330 21400 33330 48200 Table 5 - Tensile strength Nominal rivet diameter in mm. - Minimum tensile breaking load (N) EN2305 Rc 540 MPa
23、 1020 2340 4 200 6580 9490 12970 16990 26470 38275 0252MR0487T4 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN2941 Page 8 Test material hardness
24、HRC50-55 1 I a) Before upset b) After .upset Figure 1 - Upset test 5 Filing of documents For.each batch, the manufacturer shall keep documentation stating at least : - relationship between the rivet wire material batch and the rivet batch ; - a copy of the documents concerning the rivet wire materia
25、l batch and the test - heat treatment documents for the rivet batch ; - documents concerning the rivet batch inspections and tests ; - the final inspection certificate, These documents and all associated references shall be kept on file for at least three years, and available for.despatch to the cus
26、tomer at his request, within that period. references ; 6 Certificate of conformity The rivet manufacturer.shal1 supply to the customer, no 1ater.than the delivery of the product, a final inspection certificate to confirm that the product conforms with all the requirements of this specification. 02520 787T4 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
