1、STD-AECMA PREN 4312-ENGL 1999 M L0123LL 003b374 389 II Edition approved for publication 1999-08-31 AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months after the date of publication to AECMA Gulledelle 94 B-1200 BRUXELLES prEN 4312 August 1999 Edition P 1 PUBLISHED BY THE
2、EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: 49.030.20 Descriptors: Aircraft industry, aircraft equipment, stud, heat resistant steel, corrosion resistant steel, screw thread, specification, characteristi
3、c, dimension, mass, dimensional tolerance, surface treatment, designation, marking ENGLISH VERSION Aerospace series Studs, coarse tolerance reduced shank, medium length thread, in heat and corrosion resisting steel, with aluminium pigmented coating Classification: I I00 MPa (at ambient temperature)
4、/ 315 “C Srie arospatiale Luft- und Raumfahrt Goujons, Stift-Dehnschrauben, ft tolrance large, filetage moyen, en acier rsistant chaud et la corrosion, avec revtement alumino-organique Classification : 1 100 MPa ( temprature ambiante) / 315 “C mit mittlerer Gewindelnge, aus korrosionsbestndigem und
5、hochwarmfestem Stahl, mit Aluminium pigmenttete Beschichtung Klasse: 1 100 MPa (bei Raurntemperatur) I315 “C This Herospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECM
6、A-Members. It has been technically approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publicafion of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or fun
7、ctionally, 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 Standard to CEN (European Committee for Standardization) fo
8、r formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX I aecma 1999 C3 Chairman Mr Visconti Page 3 prEN 4312: 1999 I Scope This standard specifies the characteristics of studs, close tolerance shank, medium l
9、ength thread, in heat and corrosion resisting steel, with aluminium pigmented coating. Classification: I 100 MPa / 315 “C 2, 2 Normative references IS0 3353 IS0 5855-2 IS0 7913 IS0 8168 EN 2000 EN 2424 EN 4474 TR 3775 Aerospace - Rolled threads for bolts - Lead and runout requirements Aerospace - MJ
10、 threads - Part 2: Limit dimensions for bolts and nuts Aerospace - Bolts and screws, metric - Tolerances of form and position Aerospace - Corrosion- and heat-resisting steel bolts with strength classification 1 100 MPa and MJ threads - Procurement specification Aerospace series - Quality assurance -
11、 EN aerospace products - Approval of the quality system of manufacturers Aerospace series - Marking of aerospace products Aerospace series - Aluminium pigmented coating - Coating methods 3, Aerospace series - Bolts and pins - National materials 4, 3 Required characteristics 3. I See figure 1 and tab
12、les 1 and 2. Dimensions and tolerances are expressed in millimetres and apply after coating. Configuration - Dimensions - Masses 3.2 IS0 7913 Tolerances of form and position 3.3 Materials TR 3775 (heat and corrosion resisting steel, strength class: 1 I00 MPa) 3.4 Surface treatments EN 4474 After alu
13、minium deposit, optional lubrication with cethylic alcohol (code E). i) Minimum tensile strength of the material at ambient temperature 2) Maximum temperature that the stud can withstand without continuous change in its original characteristics, after return to ambient temperature. The maximum tempe
14、rature is determined by the coating. 3) Published as AECMA Prestandard at the date of publication of this standard 4) Published as AECMA Technical Report at the date of publication of this standard Previous page is blank Values in micrometres apply prior to surface treatment. Break sharp edges O, 1
15、to 0,4. Diameter Thread a 0, 02 03 LI code h12 h12 HI3 050 MJ50,8 - 4h6h 5 -1 7,5 060 MJ6xl -4h6h 6 4,6 1,4 9 080 MJ8xl -4h6h 86 1,8 12 1 O0 MJ101,25 -4h6h 10 7,5 15 120 MJI21,25 -4h6h 12 9,2 18 2,3 Key I Thread 2 Conforms to IS0 3353 3 4 Marking One hole diameter D3 (optional) L3 14 min. 0 + 0,3 12
16、 L2-2,5 14 L2-3 18 L, - 3,5 20 L, -4 22 L, - 4,5 a Shape in this area at manufacturers option Figure 1 Table 1 STD-AECMA PREN 4312-ENGL L999 I 101231L O016377 096 Page 5 prEN 4312: 1999 14,6 157 16,8 17,9 Table 2 23 31 53 24 33 56 25 35 58 26 37 61 I 024 I 24 I 4,7 I 028 I 28 I 5,l t I I I 030 I 30
17、I 5,4 I I 035 I 35 I 6,l 050 8,4 055 I 55 I 9,2 060 I 60 I 10 065 I 65 I 10,7 080 I 80 I 13,l -1-1-1- 6,3 I 12,3 I - I - 23 - 73 14,7 25 - - 811 15,5 26 41 92 17,4 29 45 10,3 19 32 49 11,4 20 26 54 12,5 21 28 48 - 13,5 I 22 I 30 I 51 46 73 095 95 - 100 100 - 105 105 - 110 110 - a Approximate values
18、(kg/l O00 pieces), calculated on the basis of 7,85 kg/dm3, given for information purposes only. They apply to studs without holes. - I 33 I 50 I 79 Page 6 prEN 4312: 1999 Description block STD-AECMA PREN 4312-ENGL 1997 W 1012311 0016378 T24 m Identity block EN4312D050040E 4 Desig na ti on EXAMPLE: N
19、OTE If necessary, the code 19005 shall be placed between the description block and the identity block. Table 3 + with 5 Marking EN 2424, style C plus MJ, indented (see figure 1). 6 Tech n ica I spec if ica ti on IS0 8168, except for clauses: - Approval of manufacturers: see EN 2000; - Qualification of studs: not applicable.
