1、AECMA PREN3043 90 1i01S321 0004795 4 mJ Edition approved for publication 1990-08-24 A. E. C. M .A. STAN DAR D NORME A.E.C.M.A. A.E.C.M.A. NORM Comments should be sent within six months C8 Chairman A.E.C.M.A. Mr. WILLIAMS after the date of publication decision 88, Bd. Malesherbes 75008 PARIS - FRANCE
2、 prEN 3043 Issue P 2 August 1990 UDC : Key words : I DITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boulevard Malesherbes. 75008 PARIS -TL. 45-63-82-85 Supersedes Issue P 1 October 1988 in h ENGLISH VERSION Aerospace series Fasteners, externally threaded, at resisting s
3、teel FE-PA92HT (A286) Classification : 900 MPa/650 OC Manufacturing method optional Technical specification Srie arospatiale Luft- und Raumfahrt lments de fixation, filets, en acier rsistant chaud FE-PA92HT (A286) Classification : 900 MPa/650 OC Mode de fabrication non impos Verbindungselemente mit
4、Aussengewinde aus hochwarmfestem Stahl FE-PA92HT (A286) Klasse : 900 MPa650 OC Herstellverfahren nach Wahl Spcification technique Technische Lieferbedingungen This Aerospace Series. pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel A
5、rospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed to an exten
6、t that interchangeability is affected, physically or functionaliy, without re-identification of 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 Sta
7、ndard to CEN (European Committee for Standardization) for final vote. AECMA PREN3043 90 W LOL231L 0004746 b W : prEN 3043 Page 2 Contents i). Scope and field of application 2) - References 3). Definitions 3.1). Production batch. 3.2). Inspection lot. 3.3). Discontinuities. 3.4). Test temperature. 3.
8、5). Simple random sampling. 3.6). Critical defect. 3.7). Major defect. 3.8). Minor defect. 3.9). Sampling plan. 3.10) .Limiting quality. 3.11).Acceptable quality level. 3.12) .Finished part - 3.13).Definition document. 4).Certificaton and quality assurance. 4.1)- Acceptance. 4.2). Quality system cer
9、tification. 4.3). Responsibility for inspection and tests. 4.4). Inspection and test report. 5).Table 1 : Technical requirement and test methods. 5.1). Material. 5.2). Dimensions. 5.3). Manufacturing. 5.4). Mechanical properties. 5.5). Metallurgical properties. 5.6). Product identification. 5.7). De
10、livery. Table 3.: Summary of tests - production acceptance. Table 4.: Minimum tensile loads. Table 5.: Classification of defects. Table 6.: Sampling plans for visual inspections and Table 7.: Sampling plans for the inspection of Table 8.: Thread discontinuities - maximum depth Table 3.: Variable sam
11、pling for tensile tests. dimensional characteristics. mechanical and metallurgical characteristics. of permissable faults. Figure i.: Cutting of flow lines in the underhead radius Figure 2.: Distortion in fillet area, Figure 3.: Non-permissable laps,seams and surface irregularities. Figure 4.: Permi
12、ssable laps, seams and surface irregularities. Figure 5.: Crest lap imperfections. Figure 6.: Metallurgical specimens. , AECMAPREN3043 90 -1012311 oOK7ri AL! prEN 3043 Page 3 1 Scope ami field of application This standard specifies the technical and quality assurance requirements for externally thre
13、aded fasteners in material FE-PA92HT (A286) of tensile strength class 9GO MPa at room temperature, maximum test temperature of material 65OOC. The externally threadec! fasteners specified here may be manufactured by machining from bar or by forging st the manufacturers opti.on, if forged there is no
14、 requirement for control of grain flow. Primarily for aerospace app7ications it is applicable to such externally threaded fasteners 17hen referenced on the product standard or drawing. 2 References IS0 468, IS0 2859-1, Sampling procedures for inspection by cttributes - Part 1 : SanFling Surface roug
15、hness - Parameters, their values and general rules for specifying requirements plans indexed by Acceptable Quality Level (AQL) for lot by lot inspection (Revision of IS0 2859-1974) 1) Non destructive testing - Penetrant inspection - General principles Non destructive testing - Liquid penetrant inspe
16、ction - Means of verification Statistics - Vocabulary and symbols F , G ,H IK) IS0 3452, IS 3453, IS0 3534, TSC 6508, Metallic materials - Hardness test - Rockwell test (Scales A,C,D,E, IS0 7961, Aerospace - Fasteners, bolts - test methods 1) IS0 9002, Quality systems - Model for quality assurance i
17、n production and iris talla t i on EN 2398, Heat resisting steel FE-PA92-HT - R 900 NPa - Bars for machined EN 2399, Heat resisting steel PE-PA92-HT - R 900 MPa - Bars for forged EN 3039, bolts D - 900 MPa cold worked and softened - Bar or wire for continuous cold forging or extrusion for fasteners
18、3 5 D 5 30 mm 1). EN 3639, m- I In preparation at the date of publication of the present standard. 2) Published as AECKA standawd at the date of publicztion of the present standard. AECMA PREN3043 90 W LOL23LL 0009748 T W , prEN 3043 Page 4 3. Definitions. 3.1 Production batch: Quantity of finished
19、parts fabricated by the same process from a single material cast(sing1e heat of alloy),having the same basic part number and diameter, heat treated together to the same specified condition and produced as one continuous run. 3.2 Inspection lot: Consists of parts from a single production batch of the
20、 same part number which completely defines the part. 3.3 Discontinuities. 3.3.1 Crack: Rup%ure in the material which may extend in any direction and which may be intercrystalline or transcrystallyne in character. 3.3.2 Seam: Longitudinal surface defect in the form of an unwelded open fold in the mat
21、erial. 3.3.3 Lap: Surface defect caused by folding over metal fins or sharp corners and then rolling or forging them into the surface. 3.3.4 Inclusion: Non-metallic particles originating from the material making process. They may exist as discrete particles or strings of particles extending longitud
22、inally - 3.4 Test temperature: Ambient temperature. unless otherwise cpecif ied . 3.5 Simple random sampling i): The taking of n items from a population of N items in such a way that all possible combinations of n items have the came probability of being chosen. 3.6 Critical defect I): A defect that
23、 according to judgement and experience, is likely to result in hazardous or unsafe conditions for individuals using, mantalning, or depending upon the considered product, or that is likely to prevent performance of the function of a maJor end item. 3.7 Major deec% i): A defect o%her %han critical, t
24、hat is likely to result in a failure or to reduce materially the useability of the considered product for its intended purpose. 3.8 Minor defecr i): A defect that is not likely to reduce materially the useability of the considered product for its intended purpose, or that is a departiire from establ
25、ished specif icaticn having little bearing on the effective use er operatiori of this product -ASCUA PREN3043 90 R LOLS3LL 0009747 L = prEN 3043 Page 5 3.9 Sampling plan i): A plan according to which one or mere samples are taken in order to obtain informatiqn and possibly to reach a decision. 3.10
26、Limiting quality LQiO i): In a sampling plan, a quality level which corresponds to a specified and relatj-vely low probability of acceptance - in this case 10% probability of acceptance. It is the limiting Lot quality characteristic that a lot of this quality would occur. When expressed as a per cen
27、t defective, it may be referred to as a lot tolerance per cent defective. 3.11 Acceptable quality level i) : A quality level which in is. sampling plan corresponds to a specified Dut rclativc-ily high probability of acceptance. It is the maximum per cent defective (or the maximum number of defects p
28、er hundred units) that, for purposes of sampling inspection, can be considered satisfactory as a process average. 3.12 Finished part: A part ready for use, inclusive of any possible treatments and/or surface coatings, as specified in the dimensional standard or drawing. -_. -.- _I - i 1 ) . Ikfiniti
29、oris taken in 1333534-1977 I I I I (ir? course of revision within XS/TC64). f I AECMA PREN3043 90 1012311 0004750- fl-_-i prEN 3043 Page 6 ri. Certification and quality assurance. The allocation of tests corresponding to the requirements of this standard is as follows: 4.1 Acceptance. 4.l.i Purpose.
30、 The purpose of acceptance tesm is to check, as simply as possible, by a. method representative of actual use conditions, with the uncertainty inherant to statistical sampling, that the bolts constituting the batch satisfy the requirements of this standard. 4.1.2 Conditions. Acceptance tests are sum
31、marised in table 3. They shall be performed on each batch. Table 1 specifies: the test method and sampling plan to be used for each test. Bolts from the batch to be tested shall be selected by simple random sampling. Each bolt may be submitted to several tests. The bolts to be subjected to destructi
32、ve tests may be those on which non-destructive tests have been performed. 4.2 Quality system certification. 4.2.1 Purpose. The purpose of quality system certification is to ensure that the manufacturer has demonstrated the acceptability of his quality system and hic ability for continuing production
33、 of parts to this stmdard, to the required level of quallty. 4.2.2 Requirements and procedure. The requirements and procedures for quality system certification shall be to the requirements of SO3002 and EN3034. 4.3 Responsibility for inspection and tests. The manufacturer is responsible for the perf
34、ormance of all inspection and test requirements as specified herein. Each manufnctiircr will use their own or exceptionally, any other facii.i.tJ.es approved in accordance with 4.3 fGr the implementation of these inspection and test requ.rernents. 4.4 Inspection and test report. A test report showin
35、g actual nimerical valiles shall he provided at the p.,rchaserz option as part c.* the rerms of the piirchase order. _ AECMA PRENWI 70 m 112311 oaoi.1751 T.= prEN 3043 Page 7 I AECMA PREN3043 30 LOL23LL O004752 1-m prEN 3043 Page 8 5. Table 1 Technical requirenents and test method. * A = Production
36、acceptance requirenents (4.11. 1 Clause :Characteristic 1 Technical requirement I Inspection and test method I A i Sample : I I I I I 1 size l I-I-l-l- i - i- i5.3.3 I I I I l I I I !sphere shall not cause any surfaceishall be approved. I I l l I I I I I I Icontamination except as permitted I I I I
37、I I I I 1 I I l Iby clause 5.5.2. I I l I l I I I I I !Any scale which will not be renov-:The equipment for abrasive I I I I 1 I l I 1 led by subsequent machining shall Iblasting shall be approved. i I I I I I I l I I :be removed by abrasive blasting. 1 I I l I-I-l-l-l I-I- l l I I I I I :Heat treat
38、ment !The heat treatment medium or ateio-:The heat treatment equipnent 1 1 I 15.3.3.1 Isolution heat :Forged parts to be solution I I l I I I l I l I l I l I I I l I I I 1-1 I 1 I I l 1 I I I I I I I l I I I I I 1 I 1 I l I l I I I I I treatment :treated at a temperature of 9800c i I I I I I I+15C f
39、or 1 hour, quenching in oil: I I I I Ir water. I I I I I-I-l-l-l l :heat treatient Irolling if specied on the product f I I I I !standard) the parts shall ho l I I I I I !pre$pitation treated at 710 C- I I l I I I 1730 C holding tp selected teaper-; I I I I I :ature within ti3 C for not less f I 1 I
40、 I I Ithan 16 hours-and cooled in air. I I I I I-l-l-I-l I-I- I l I Isurface I treatment the parts shall have all: I I I I Icontaaination l the shank and bearing surface of I I I l I I Ithe head ground: I I 1 I I I (a) for the renioval of all surface f I I I I I I contamination and oxide I I I I 1 I
41、 I penetration, I I I I l I Ib) to obtain a clean snooth I I I I I I I surface, I I I I I-!-I-l I- l -_- I l I Idard parts shall I after coapletionland visual examination. I A tables I I I 1of solution, precipitation treat- I l I667 1 laent and machining, have the Ifiliet radius cold rolled suffi- :
42、 I I l Iciently to remove all evidence of I I I l I I Iaachining. Cold rolling the head I I I l I Ito shank fillet radius iay cause I I I I l l Idistortion of the fillet area. I l I l I :Any such distortion shall be in I I I l I I laccordance with the requireaents I I I I l I lof figure 1 unless oth
43、eruise i I l I I I (specified on the product standard I I l l I I lor definition document. I l I I I i5.3.3.2 IPrecipitation iflefore thread rolling (and fillet I I I l l I 15.3.4 :Removal of :After solution and precipitation I l I I 1 I I I I I I I I r I I I I I I l I I I I l l I I I l I I I I I I
44、1 I l I I I I I I l 15.3.5 :Cold rolling IIf specified on the product stan- ;Dimensional check (see 5,5.2)1 l I I I I I I I I I 1 I I I l I l I l I l I l l I I I I I I I I I I I I I I l l I I I I 1 I l I I I l I I I I I I I I I l I I I I I I I I I I l I I . 0004753 3 prEN 3043 Page 9 5. Table 1 Tech
45、nical requirements and test method. Clause :Characteristic I Technical requirement Inspection and test method I A : Sample ; I I I I I size I I-: :-:-1-1-1 :5.3.5 !For parts uith coipound radii bet-: I I I :(cant.) I Iween head and shank, cold work : I 1 I 1 I :only the radius that blends uith I I I
46、the head, however it is acceptable! Ifor cold work to extend over the I I I I I coipound radius. I l I I I IThe fillet shall not shou evidence:specified in table 4. Ialprotruding head bolts of : I I !Standard externally wrenched boltsf grip length less than SD; : I I I :shall not fail in the head to
47、 fbicountersunk head bolts of : I I I I Ishank area when subjected to the I overall length less than 3DI I I 1 1 I :tensile test. t or bolts having an overall ! I I I length less than 18m. I IIn such cases acceptability I I I fshall be based on the results: I I Ifros test bars of the saBe f I :saterial heat treated within : :the sape process cycle. I I I I-f-I-l-l- :-I I :rature tensile Idestruction in accordance : A table 7 I I I strength I Iwith IS07961 test 3.1 I :coluan B I
