1、STD-AECMA PREN 2687-ENGL 1999 = LOL2311i 0035966 800 Edition approved for publication AECMA STANDARD NORME AECMA AECMA NORM C5 Chairman Comments should be sent within six months after the date of Dublication to prEN 2687 Edition P I February 1999 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE IN
2、DUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 Descriptors: ENGLISH VERSION Aerospace series Aluminium alloy AL-P7010- T7451 Plate 6 mm 20d lectrical conductivity Dimensions (mm) ;tress corrosion L-T T-L s-L MPa fi MPa fi MPa fi :racture toughness
3、 KIC) - ixternal defects dotchlvield ratio See EN 4400-1 ixfoliation corrosion - - nternal defects 3atch uniformity See EN 4400-1 See EN 4400-1 Marking inspection Dimensional inspection Notes Typical use -I See EN 4400-1 71 y 2 23,O MSlm I Acceptable 22,O MSlm y 23,O MS/m Acceptable if Rp0,2 LT 2 Rp
4、0,2 min. LT + 70 MPa or if stress corrosion test acceptable. 1 y 22,0MSlm I Not acceptable 25a 50 1 t 28 I 2 25 I - 50ac 75 I t 28 I 2 25 I 2 24 75ac 160 I t 27 I 2 24 I 2 23 See EN 4400-1 See EN 4400-1 Exfoliation corrosion shall not be greater than that of grade EB. See EN 4400-1 See EN 4400-1 I 1
5、) Artificial ageing may be carried out using the following alternative single stage methoc heating to a temperature of 165 C 5 85 175 “C at a rate not exceeding 20 “Clh an soaking at this temperature for 8 h 5 t 5 18 h. 2) Or A4 2 3,5 if required by the purchaser. 3) Or A4 t 3 if required by the purchaser. -I STD-AECMA PREN 2b87-ENGL 3999 W 3012333 0035970 233 - Page 6 prEN 2687: 1999 Product qualification See EN 4400-1 Qualification programme to be agreed between manufacturer and purchaser.
