1、AECMA PREN*3903 95 m LOL23LZ 0008552 4bb IB . - EDITE PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATERIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication Comm
2、ents should be sent within six months after the date of publication to AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE 1995-04-28 prEN 3903 Edition P 1 April 1995 C3 Chairman M. Arena ENGLISH VERSION Aerospace series Washers, laminated, in corrosion resis
3、ting steel Srie arospatiale Rondelies pelables, en acier rsistant la corrosion Luft- und Raumfahrt Scheiben aus Schichtblech, aus korrosionsbestndigem Stahl This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Aro
4、spatial It is published on green paper for the needs of AECMA-Membr+ It has been technically approved by the experts of the concerned Technical Committee follolIins comment by the Member countries. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an ex
5、tent that interchangeability is affected, ph ysicaly 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 draft European
6、Standard to CEN (European Committee for Standardization) for formal vote. i d I P , . AECMA PRENt3903 95 L01231L 0008553 3T2 Page 3 prEN 3903 : 1995 I I Scope This standard specifies the characteristics of laminated washers, in corrosion resisting steel, for maximum operating temperature 120 OC, for
7、 aerospace applications. 2 Normative references EN 2000 Aerospace series - Quality assurance - EN aerospace products - Approval of the quality system of manufacturers EN 2424 Aerospace series - Marking of aerospace products 3 Required characteristics 3.1 See figure 1 and table 1. Dimensions and tole
8、rances are expressed in millimetres. Configuration - Dimensions - Masses 3.2 Material Austenitic corrosion resistant steel R, 2 440 MPa Previous page is blank AECMA PRENr3903 95 E LOL23Ll 0008554 239 I 1.6 Page 4 prEN 3903 : 1995 I 7 7 Values in micrometres A t I l I I &Dl Diameter code II Dl D2 Mas
9、s 1 H13 nom. I TOI. I II 040 050 060 070 080 1 O0 120 140 160 180 L Shim thickness : 0,025 (code A) 0.05 (codeB) 0.1 (codeCl 4,3 8 0,45 5,5 10 0,69 63 11 O 0,78 1,18 7,5 14 83 15 1,45 - 0,4 16,5 18 2,Il 12,5 “ , 21 2,81 14,5 24 !, 3,61 16,5 27 4,50 18,5 30 : , psT Figure 1 220 240 Table 1 22,5 36 24
10、,5 38 270 27,5 42 I I 300 30,5 45 10,8 I 9,94 AECMA PRENx3903 95 CIBI 10L2311 0008555 175 PII i 2, ! Page 5 prEN 3903 : 1995 4 Designation EXAMPLE : Description block I Identity block WASHER I EN3903A2 Thickness code (see figure 1) 1 Diameter code (see table 1) NOTE : if necessary, the code I9005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style G 6 Quality assurance EN 2000
