1、Latest date for receipt of comments 28 Februarv 1997 Project No 9 4128 ACE/24 Our ref Technical Camittee ACE/24 Date 9 December I996 Wrought and cast aluminium and magnesium alloys for aerospace DRAFI? EROPEAN SANDm - AEROSPACE SERIES ALUMINIUIM AL-P2024-T4 CLAD sI“ AND STRIP FOR ,!TEEEH 3DRMING O,
2、3m o( series aluminium alloys *) Aerospace series - Metallic materials - General organization of standardization - Links between types of EN standards and their use 2, Aerospace series - Aluminium and aluminium alloy wrought products Technical specification - Part 3 : Sheet, strip and formed profile
3、s Aerospace series - Metallic materials - Rules for drafting and presentation of material standards - Part 2 : Specific rules for aluminium, aluminium alloys and magnesium alloys *) 1) In preparation at the date of publication of this standard 2) Published as AECMA Prectandard at the date of publica
4、tion of this standard i P 6.1 Delivery condition Page 4 prEN 2091 : 1996 T4 Method of melting - Form Clad sheet and strip Method of production Rolled Limit dimension(s) mm 0,3 1 a 1 6 Technical specification EN 4400-3 I Heat treatment 490 “C 1 45 500 “CI WQ O1 40 “C + O= ambient It 2 5 d Characteris
5、tics rest sample(s) See EN 4400-3 rest piece(s) See EN 4400-3 I I I Temperature 8 “C Ambient Ambient Ambient Ambient Proof stress IRp0,21 MPa I 2 240 2 240 I 2 250 2 250 Strength 2 390 2 400 2 420 2 420 Elongation A% A50 mm A50mm18 *50mm2* mm 18 Reduction of area Z % - - - - Hardness - - - - Shear s
6、trength Rc MPa Bending k- 1,5;a=18Oo 1 2;a=180 ) 23; a= 180“ $1 3,5;a=180 1 Impact strength - - - - - 1 Temperature I 6 I “C I - Time h - MPa Stress - C Elongation a% - Oa 1 Rupture stress I 1 MPa 1 .I I Elongation A Oh at rupture ntergranular corrosion External defects liffusion in the cladding Cla
7、dding chemical :om position % Marking inspection Dimensional inspection Notes Typical uses Page 5 prEN 2091 : 1996 1 EN 2716 1 EN 2007 2 The “capability clause“ applies. Thickness (mm) Maximum diffusion of Cu in the cladding (Oh of the actual cladding thickness) I 0,3 5 a 5 0,6 I To be agreed betwee
8、n purchaser and manufacturer I I 0,8 a 1,2 I50 1,2 a 1,6 140 1,6 a 52,5 I I 50 2,5 a S4,O I 140 4,O a 6,0 I 120 - - - - - - - - - 99,50 min. max. 0,25 0,40 0,05 0,05 0,05 0,07 0,05 0,03 - - or as an alternative, if agreed between purchaser and manufacturer See EN 4400-3 See EN 4400-3 1) The “capability clause“ applies. Page 6 prEN 2091 : 1996 roduct qualification See EN 4400-3 !ualification programme to be agreed between manufacturer and purchaser
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