1、A. E,C. M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM prEN 2576 Issue P 1 22 May 1987 DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS RE MATRIEL AROSPATIAL 88. boulevard Malesherbes, 75008 PARIS - TL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Bolts in heat resisting steel Cl
2、assification : 900 MPa/650 OC Technical specification FE-PA92HT(A286) Srie arospatiale Vis en acier rsistant chaud Classification : 900 MPa/650 OC Spcification technique FE-PA92HT (A286) Luft- und Raumfahrt Schrauben aus hochwarmfestem Stahl Klasse : 900 MPaf650 OC Technische Lieferbedngungen FE-PA9
3、2HT (A286) This Aerospace Series, pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approved b y the experts of the concerned AECMA C
4、ommission following comment by the Member countries. Sotsequent to the publication of this pre-standard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and signature
5、 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. Nota - Extra copies can be supplied by B.N.A.E. - 8, rue Moreau-Vauthie
6、r - 92100 BOULOGNE-BILLANCOURT Comments should be sent within six months C8 Chairman I after the date of publication decision Edition approved for publication 2 November 1987 A.E.C.M.A. 88, Bd. Malesherbes 75008 PARIS - FRANCE Mr. WILLIAMS AECN PREN2576 87 W 1012311 000bbb5 5 prEN2576 Page 2 Content
7、s. 1). Scope and field of application 2). References 3). Definitions 3.1). Production batch. 3.2). Inspection lot- 5.3). Discontinuities. 3.4). Test temperature. 3.5). Simple random sampling. 3.6). Critical defect- 3.7). Major defect. 3.8). Minor defect. 3.9). Sampling plan. 3.10).Limiting quality.
8、3.11).Acceptable quality level 3.12).Finished bolt. 3.13).Definition document. 4).Certification and quality assurance. 4.1). Qualification. 4.2). Acceptance. 4.3). Quality system certification. 4.4). Responsibility for inspection and tests. 4.5). Inspection and test report. S).Table 1 : Technical re
9、quirement and test methods. 5.1). Materials. 5.2). Dimensions. 5.3). Manufacturing- 5.4). Mechanical properties. 5.5). Metallurgical properties. 5-61. Product identification. 5.7). Delivery. Table 2.: Material removal. Table 3.: Qualification testing requirements for Table 4.: Summary of tests - Qua
10、lification and Table 5.: Minimum tensile and stress rupture loads. Table 6.: Classification of defects. Table 7.: Sampling plans for visual inspections and Table 8.: Sampling plans for the inspection of Table 9.: Thread discontinuities - maximum depth Tablelo-: Variable sampling for tensile tests. b
11、olt samples. Production acceptance. dimensional characteristics. mechanical and metallurgical characteristics. of permissible faults. Figure 1.: Head structure and grain flow- Figure 2.: Distortion in fillet area. Figure 3.: Grain flow in thread. Figure 4.: Non-permissible laps,seams and surface Fig
12、ure 5.: Permissible laps, seams and surface Figure 6.: Crest lap imperfections. Figure 7.: Metallurgical specimens. irregularities. irregularities. AECMA PREN2576 87 1012311 0006666 7 - - prEN2576 Page 3 i. Scope and fiiel of applicat2on This standard specifies the technical, qualification and quali
13、ty assurance requirements for bolts in material FE FAgS-HT(A286) of tensile strength class 900MPa at roog temperature,maximuni test temperature of material 650 c. Frimarily for Aerospace applications it is applicable to O such bolts definition 2. References I50468 1533 Z859/1 S034SS I503453 I503534
14、Is06508 IS09002 EN2002-8 EN2399 EN3039 EN3041 EN3042 CN/TR3040 when referenced on the product standard or docunent. : Surface roughness - parameters, their values and general rules for specifying requirements. : Sampling procedures for inspection by attributes. - Part 1 : Sampling Plans indexed by a
15、cceptable Quality LevellAQL) for Lot by Lot inspection, (Revision of ISO2859-1974). 1). : Non Destructive Testing - Penetrant inspection - General principles : Non destructive testing - Liquid penetrant inspection - Means of verification : Statistics -Vocabulary and symbols : Metallic materials: Har
16、dness test: Rockwell test. Scales A,B,c,D.,E,F,G,H,K. : Aerospace: Fasteners , bolts: test methods. 1). : Quality systems - Model for quality assurance in production and installation, : Aerospace Series:Test methods for metallic materials - Part 8: Micrographic determination of grain size. : Heat re
17、sisting steel FE PA92 HT -Ra equal to or greater than 900MPa bars for forged bolts D equal to or less than 25- -Aerospace Series. : Aerospace series: Quality systems: supplementary requirements to IS09002 applicable to the aanufacture/processing of materiel for propulsion standard parts I 1 ) . : Ae
18、rospace series: Propulsion standard parts: Manufacturing process - change procedure for qualified parts.1). : Aerospace series: Propulsion standard parts: Qualification procedure. 1) : Aerospace series: Propulsion standard parts: Qualification List of qualified manufacturers. 1). I). In preparation
19、c I prEN2S76 Page 4 I :3. Definitions. 3.1 Production batch: Quantity of finished bolts 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 tu the same specified condition and produced as one continuo
20、us run. 3.2 Inspection lot: Consists of bolts from a single production batch of the same part number which completely defnes the bolt. 3.3 Discontinuities. 3.3.1 Crack: Rupture in the material which may extend in any direction and which may be intercrystalline or transcrystallyne in character. 3.3.2
21、 Seam: Longitudina1,surface defect in the form of an unwelded open fold in the material. 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 Incliision: Non-metallic particles originating from the material making proce
22、ss. They may exist as discrete particles or strings of particles extending longitudinally. 3.4 Test temperature: Ambient temperature, unless otherwise specified - 3.5 Simple random sampling 1): The taking of n items from a population of N items in such a way that all possible combinations of n items
23、 have the same probability of being chosen. 3.6 Critical defect i): 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
24、 function of a major end item. 3.7 Major defect 1): A defect other than critical, that is likely to result in a failure or to reduce materially the useability of the considered product for its intended purpose. 3.8 Minor defect 1): A defect that is not likely t.0 reduce materially the useability of
25、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. * AECMA PREN2576 87 9 1012311 0006668 O 9 3 .Q Lhnitng quality LQio 1): In a sampling plan, a quality level wh%cb earrespand
26、s ta a speciEed and relatively law IprsBabilSty of acceptance - in this case 10% quality characterlstie that a lot of thas qpia89ty would occur. When expressed as a per cent defective, it may be referred to as a 1st toleranee per cent defect8ve- probability of acceptance. St 2s the limiting lot 3.11
27、 Acceptable quaLL sampling plan CQXWSSJRS to a specified but relatively hThe heat treatment medium or atao-:The heat treatment equipment I I 1 I I I I 1 I I I I I I I 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 l l I I I I I I I I I I I I I l I l I l I I I I I I I I I I I I l I I l I
28、 I l I Isphere shall not cause any surface; shall be approved. I I I I Icontaniination except as pernitted I I I I 1 I ;by clause 5.5.6. I I I I , I (Any scale which will not be renov-;The equipment for abrasive I I l l I led by subsequent aachining shall Iblasting shall be approved. I I I I l :be r
29、eaoved by abrasive blasting. I I l I . ; - 1 :5.3.2.1 ;Solution and ;The headed blanks shall be solut- I I :precipitation (ionotreat$ at a teHperature of I I l l I l Ipr7ipita;ion heat treated at I I l l I I710 C-73OOC holding the selected I I l I I I fhours aid cooling in air. I I l I I Iheat treat
30、nent I980 C tl5 C for 1 hour. quenching ; I l l l lin oil-or water. The headed and I I l I 1 I !solution treated blanks shall then; I I I l l :within t8 C for not lesr than 16 I I I I 1 AECMA PREN2576 87 LOl231l 000bb72 2 m prENB?L Page9 5. Table 1 Technical requirements and test method, Q = Qualifi
31、cation approval requirements (4.1). A = Production acceptance requirements (4.2). -_-*- : Clause :Characteristic ; Technical requirement I Inspection and test method : QiA F Sample ; l I I L I I size I ;-1 I-,-(-l-l- 11 15.3.3 :Removal of :After solution treatmen the : I l I l I I I surface :headed
32、blanks shall have all the i E I I l 1 l I icontamination ishank and bearing surface of the ; I t I I ;head ground : I 1 I :a) for the removal of all surface ; I I I contaiination and oxide I I I penetration, L 1 I l :bl to obtain a clean smooth I I I l I I :as practicable but shall not exc- i I L I
33、I c :eed the limits of table 2. f I :-!-I-l I l I 1 I I I l I 1 l k I I I I l l I l 1 I I E I t I l I l I I I I I I I 1 I I L I l I 1 I I t I I I I I I I I I I I I I I I I I I r I I t I I I 1 I I I I 1-1 I- I I i5.3.4 1 I I I I I s L I l I I I t I I 1- I l I I l I I l I l l l I I I I 1 I l I r ;Head
34、 to shank :fillet I I I I I I I I I I t t 1 I l I I 1 I I I I l I I I I I 1 1 I I 1 I r ;After coapIetion of solution, pre-:Dimensional check (see 5.5.2: Q ; 25 Idpitation treatment and machining: and visual examination. I A ! tables :the underhead radius shall be cold: I687 :rolled sufficiently to
35、remove all ! 1 r I :evidence of aachining. Cold rolli-: i I :ng the head to shank fillet radius: t I :nay cause distortion of the fillet: I I 1 :area. Any such distortion shall be: t I :in accordance with the requirem- : I 1 l ients of figure 2 unless otherwise ! I 1 I :specified on the bolt standar
36、d or ; Idefinition document , :For parts uith corppound radii bet-: I F I :ween head and shank, cold work : 1 I I :only the radius that blends with I I :the head, however it is acceptable! 1 1 :for cold work to extend over the ; t I I :conpound radius. :The fillet shall not shou evidence:% 5.5.4.1 f
37、 cf seams or inclusions, I I I I I L I I I I l I 1 r I I l I I I 1 t I I I I I I I I I t I 1 I l l I I I I 1- 1 1 I I I I I 1 I l AECMA PREN2576 87 = LO12311 0006673 4 = prEN2576 Page 10 5, Table 1 Technical requirements and test method, * O = Qualification approval requirements (4.11, A = Productio
38、n acceptance requirements (4.2). _- I Clause ;Characteristic I Technical requirement I Inspection and test method I Q/A I SaRple i I l I I 1 I I l I size I 1_1_I_- I-_-l-o-_l I ;properties Ifrom each diaieter of barhoil ;sufficient to provide tens- I I l I l !drawn from each cast, and shall !ile and
39、 stress rupture test I I I I I Ibe heat treated together uith a Ipieces. The test pieces shall; I I I I ;production batch of bolts. Imeet the mechanical propert- ; I I I l I iies required by the material I I I I I 15.4 ;Mechanical IA test sample shall be selected IThe sample selected shall be I I I
40、l I l I I I I I I I I I I I l I I I I I I I I l !specification. I I l I L 1_-_-1-_-_-_I_-_-l-l - i5.4.1 ;Tensile !The finished bolts shall uithst- :Tensile tests are not applic-I I I 1 I I I I I I I strength land the minimum tensile loads Iable to the following: I l I I I ;specified in table 5. lalp
41、rotruding head bolts of ! I I I ;Standard externally wrenched bolts: grip length less than 2D; I I I I I Ishall not fail in the head to Ib)countersunk head bolts of I I I l I Ishank area uhen subjected to the I overall length less than 3DI I I I l I tensile test. I or bolts having an overall I I I l
42、 I I length less than 18m. I I I I I I IIn such caces acceptability I I I I l Ifroai test bars of the same I I I I I l :material heat treated within I I l l I I Ithe same process cycle. I I I I_(_I_-l- 15.4.1.1 IAabient tempe- ! IThe bolts shall be tested to : Q I 4 ! I idestrustion in accordance A
43、I table 8 I I irature tensile I I I Iwith IS07961 test 3.1 I Icoluan B I I I I I I ; or ! ;strength I l I I I table i01 1_1_I_-_-o I- 15.ri.2 istress rupture ;ThenfinishThe bolts shall be tested in I Q I 3 I I I I I 1 l I I I l I l l I l I I I I I I 1 I I I I r I I I I I I I I I I I I I l I l I l I
44、Ishall be based on the resultsf I I I I I I l l I I I l I I I I I I l I I I I I I I I I l l Iprogerties at 1650-C t2“C while the load specif- taccordance uith IS07961 test i I I650 C lied in-table 5 is applied continu-13.9 I l I I I lously, shall not rupture in less I I I I I I ;than 23 hours. I I I
45、 I 1_1_I_- i-!- ! 5.4.3 f Hardness IThe hardness of the finished bo1ts:For hardness testing see I Q I 4 I l Ishall be uniforni and within the :ISO6508. ( A table 8 I I I f I column Al I I frange Rockuell C26-C35, but hardn- I l l (ess of the threaded section and of I I I I I I :the head to shank fil
46、let area may ! I , I I !be higher as a result of the cold I I I I l Iworking operations. I l I I I I I I I I I I l l I I I I I 1 i I I I I I . AECMA PREN257b 137 = 1012311 0006b79 b = prEN2576 Pagel1 5. Table 1 Technical reqeireaents and test nethod. * U = Qualification approval requirements i4.11. A = Production acceptance requirements (4.2). . I Clause :Characteristic : Technical requirement i Inspection and test method : Q/A i Sample : l I I I size : i-(-I-:-l-l X.5 :Metallur
