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. I prEN2941 Page 3 AECMA
6、PRENZLiL 88 m 101123LL OOQLi_C4L T m 1 Scope and field of application This standard specifies the performance 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,
7、 after agreement between the customer and the supplier, for solid rivets made from other materials, requires 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 - Tes
8、t methods for metallic materials - Part 1 : Tensile testing at ambient temperature 1) EN2802-9, Aerospace 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) E
9、N2305, Nickel base alloy NI-Pl1 - 540 MPa - roperties Iouble shear Non-assembled rivets (i.e. without 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
10、 5.2 5.3 See EN2002-E. Yension Rivet wire samples shall confom with the values specified In table 5. Refer 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 wit
11、h the rivet hardness values within a tolerance of 25%, After upset the head of the rivets shall be free 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 substan
12、tially conforming to Fig la. The free end of the rivet shall be upset using a flat tool to obtain a head conforming to the requirements of Fig. lb. 0252HR0787T4 AECMA PREN2941 AA 1012311 0004543 3 prEN2941 Page 5 Table 1 - Technical requirements and test methods (Contd) Characteristics urface condit
13、ion, 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, scores, cracks tain the following information : - Identity block of the standard rivet - Quant
14、ity (mass or number of rivets) - Customers order number - Manufacturers identitication, name and address - Number of manufacturers delivery note - Manufacturers batch number - tnuEclctarers inspection stmp Labels attached to a secondary package shall include the following information as a minimum :
15、- Identity block of the rivet - Quantity - Batch number - Inspection stamp. 0252MR0787T4 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 t
16、o 10000 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) Defect
17、ive rivets 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 samplin
18、g batch. 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 eff
19、ect shall be added to the corresponding inspection documents. 0252MRCI787T4 AECMA PREN2741 88 m 1012311 0004545 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
20、 Table 5 - Tensile strength Nominal rivet diameter in mm. - Minimum tensile breaking load (N) EN2305 Rc 540 MPa 1020 2340 4 200 6580 9490 12970 16990 26470 38275 0252MR0487T4 prEN2941 Page 8 Test material hardness HRC50-55 1 I a) Before upset b) After .upset Figure 1 - Upset test 5 Filing of documen
21、ts 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 material batch and the test - heat treatment documents for the rivet batch ; - documents conc
22、erning 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 customer 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
