1、CEN PRENSZb49 94 3404589 00707b5 AT9 = I Srie arospatiale Vis tte cylindrique fendue, filetes jusqu proximit de la tte, en acier alli, cadmies Classification : 900 MPa I ( temprature ambiante) 1235 OC AECMA STANDARD NORME AECMA AECMA NORM prEN 2649 Edition P 2 August 1994 EDIT PAR LASSOCIATION EUROP
2、ENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : 621.882.2 : 629.7 Supersedes issue P1 February 1987 Descriptors : Aircraft industry, aircraft equipement, cheese head, screw, slotted head screw,
3、alloy steel, cadmium, screw thread, specification, characteristic, dimension, mass, dimensional tolerance, surface treatment, designation, marking ENGLISH VERSION Aerospace series Screws, pan head, slotted, threaded to head, in alloy steel, cadmium plated Classification : 900 MPa (at ambient tempera
4、ture) / 235 OC Luft- und Raumfahrt Flachkopfschrauben mit Schlitz, Gewinde annhernd bis Kopf, aus legiertem Stahl, verkadmet Klasse : 900 MPa (bei Raumtemperatur) 1235 OC This “Aerospace Series Prestandard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs d
5、e Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publication of this prestandard, the technical content shall not be
6、changed to an extent that interchangeability is affected, physically or functionally, 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
7、 draft European Standard to CEN (European Committee for Standardization) for formal vote. I Nota - Extra comes can be sumlied bv R.N.A.E. - Technooolis 54 - 199, rue Jean-Jacaues Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX C3 Chairman I Comments should be sent within six months after the date of oub
8、lication to I Edition approved for publication I 1994-08-31 AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE Mr. Arena I I I aecrna 1994 CEN PRENm2649 94 m 3404589 00707bb 735 Page 2 prEN 2649 : 1994 Foreword The equivalent text of this standard was submit
9、ted for Officiai Services ballot until 1 st July 1993. Comments received from Official Services were incorporated following decisions taken by Technical Committee C 3 during its 65th meeting on 15th October 1993. CEN PRENn2649 94 3404589 0070767 671 Page 3 prEN 2649 : 1994 1 Scope This standard spec
10、ifies the characteristics of screws, pan head, slotted, threaded to head, in alloy steel, cadmium plated. Classification : 900 MPa 1 / 235 OC 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are ci
11、ted at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest editi
12、on of the publication referred to applies. IS0 3353 IS0 5855-2 IS0 7689 IS0 7913 EN 2000 EN 2133 EN 2205 EN 2424 EN 2438 EN 2444 TR 3775 Aerospace - Rolled threads for bolts - Lead and runout requirements Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts Aerospace - Alloy steel b
13、olts with strength classification 1 100 MPa and MJ threads - Procurement specification Aerospace - Bolts and screws, metric - Tolerances of form and position Aerospace series - Quality assurance - EN aerospace products - Approval of the quality system of manufacturers Cadmium plating of steels with
14、maximum specified tensile strength equal to or less than 1 450 MPa and copper and copper alloys - Aerospace series 31 Steel FE-PL43 S - 900 MPa I R, I 1 1 O0 MPa - Bars De I 40 mm - Aerospace series 3, Aerospace series - Marking of aerospace products 3, Steel FE-PL62 - 900 MPa I R, I 1 1 O0 MPa - Ba
15、rs De I 40 mm - Aerospace series 3, Steel FE-PL71 1 - 900 MPa I 1 100 MPa - Bars and wires De I 45 mm - Aerospace series 3, Aerospace series - Bolts and pins - National materials 4, iW: 1) Minimum tensile strength of the material at ambient temperature 2) Maximum temperature that the screw can withs
16、tand without continuous change in its original characteristics, after return to ambient temperature. The maximum temperature is determined by the surface treatment. 3) Published as AECMA Standard at the date of publication of this standard 4) Published as AECMA Technical Report at the date of public
17、ation of this standard CEN PRENxZb49 94 3404589 00707b 508 = Page 4 prEN 2649 : 1994 3 Required characteristics 3.1 Configuration - Dimensions - Masses See figure 1 and table 1. Dimensions and tolerances are expressed in millimetres and apply after surface treatment. 3.2 Tolerances of form and posit
18、ion IS0 7913 and those specified in figure 1 and table 1 3.3 Materials EN 2205, EN 2438, EN 2444 or TR 3775 (alloy steel, classification : 900 MPa) 3.4 Surface treatment EN 2133, 8 pm to 14 pm on all surfaces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous deposi
19、t shall be present, but no value is specified. Black colour option : code B CEN PRENb2649 94 3404589 0070769 444 m Page 5 prEN 2649 : 1994 r 1 Values in micrometres apply prior to surface treatment. VI VJ Break sharp edges O, 1 to 0,4 I i/ I! II I fi +i I I i 1 i Shape optional Figure 1 CEN PREN*264
20、9 94 3404589 0070770 Lbb E Diameter Thread ? D1 D2 D3 code O - 0.3 min. nom. Tal. nom. TOI. 1 016 MJ1,60,35-4h6h 3,2 1.9 1,l 020 MJ20.4 - 4h6h 4 2,7 1.4 1,2 025 MJ2.50.45 - 4h6h 5 3,7 1.9 o 1,5 . o 6 4.7 2.3 - 0.5 , 1.8 , 030 MJ30.5 - 4h6h 035 MJ3,50,6 - 4h6h 7 5.7 2,7 . 2.1 -o?2 O40 MJ40.7 - 4h6h 8
21、 6.7 3 2.4 050 MJ50, - 4h6h 10 8.7 3,4 3 i 0,5 0 060 MJ6xl - 4h6h 12 10.7 4.2 3,6 o,3 Page 6 prEN 2649 : 1994 F G H min. min. nom. TOI. 0,4 0.4 0,45 0.5 0,5 0,55 0.6 0.6 0.65 + 0.15 0,7 0.7 o,a5 . o . 0,8 0.8 0,95 , 1 1 1 ,O5 1.2 1.2 1.25 + o,25 0 185 1,s 1.65 Table 1 1) In accordance with IS0 5855-
22、2 2) Increments : 2 for 15 100 4 for1 100 3) If greater lengths are required, they shall be chosen using the above increments. The length code corresponds to the length 1, completed by one or two zeros to the left, where necessary, to obtain a three digit code. 4) Approximate values (kgll O00 pieces
23、), calculated on the basis of 7,85 kg/dm3, given for information purposes only 5) Value for head and first 1 6) Increase for each additional 2 mm of L. CEN PRENlk2b49 94 = 3404589 0070773 OT2 Page 7 prEN 2649 : 1994 4 Designation EXAMPLE : Description block Identity block Diameter code (see table 1)
24、 Number of this standard Length code (see table 1 i Black colour code (see 3.4) NOTE : If necessary, the code 19005 shall be placed between the description ,.xk and the identity block. 5 Marking See table 2 and figure 1. Table 2 EN 2424 Style Diameter code I 016to035 I G I I 040to060 I F I 6 Technic
25、al specification IS0 7689, with the following modifications 6.1 Approval of manufacturers EN 2000 6.2 Other modified requirements - Inspection for discontinuities shall be carried out during the microstructure inspection ; - Classification of defects : replace AQL 0,065% by 1 %. 6.3 Requirements deleted - Qualification of screws ; - Tensile strength ; - Double shear strength ; - Tension fatigue strength.
