1、CEN PRENx3BBO 94 W 3404589 O073254 180 Edition approved for publication 1994-09-30 AECMA STANDARD NORME AECMA AECMA NORM Comments 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 prEN 3880 E
2、dition P 1 September 1994 _ DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : Descriptors ENGLISH VERSION Aerospace series Aluminium alloy AL-P7075- T73 Die forgings aIl2
3、5mm Srie arospatiale Alliage daluminium AL-P7075- T73 Pices matrices et forges a I 125 mm Luft- und Raumfahrt Aluminiumlegierung AL-P7075- T73 Gesen kschmiedestcke a I125 mm This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeu
4、rs de 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
5、 be 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
6、as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX C5 Chairman M. Odorico aecrna 1994 CEN PREN*388O 94 3404589 0073255 017 P
7、age 3 prEN 3880 : 1994 O Introduction For the use of this standard, see EN 2500-2. 1 Scope This standard specifies the requirements relating to die forgings, in aluminium alloy AL-P7075-, for use in the T73 condition, a 5 125 mm, for aerospace applications. 2 Normative references This European Stand
8、ard incorporates by dated or undated reference provisions from other publications. These normative references are cited 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 t
9、his European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 2004-1 Aerospace series - Test methods for aluminium and aluminium alloy products - Part 1 : Determination of electrical conductivity of w
10、rought aluminium alloys EN 2082-3 Aerospace series - Aluminium alloy - Cast forging stock and forgings - Technical specification - Part 3 : Pre-production and production forgings EN 2500-2 Aerospace series - Instructions for the drafting and use of metallic material standards - Part 2 : Specific req
11、uirements for aluminium, aluminium alloys and magnesium alloys 1) Previous page is blank 1) Published as AECMA Prestandard at the date of publication of this standard Page 4 prEN 3880 : 1994 Element Chemical composition ,in. % max. Method of melting Material designation I Aluminium alloy AL-P7075- S
12、i Fe Cu Mn Mg Cr Zn Ti Ti + Zr Others AI - - 1,2 - 2,l 0,18 5,l - - - Each Total - Base 0.40 0,50 2,O 0,30 2,9 0,28 6,l 0,20 0,251 0,05 0,15 - Form Method of production Die forgings - Limit dimensions (mm) 5.1 Technical specification I al 125 EN 2082-3 K T73 Delivery condition +105OC 58 2 125OC 16h
13、I t I 24h + 172OC I e I 182OC / 6h 5 t 5 18h + 4600 I e I 4700 i WO 6ooc I e I 8ooc 5.2 Dimensional standards U T73 Delivery condition 6.1 Delivery condition and heat treatment 8 9 10 11 12 6.2 Delivery condition code Sample Test piece Heat treatment Dimensions concerned mm a 5 25 25 i a I 75 75 a 1
14、00 100 al 125 Thickness of cladding o+ - on each face Direction of test piece L LT L LT ST L LT ST L LT ST Cut from forgings in accordance with the drawing andlor inspection schedule Location and direction in accordance with the drawing and/or inspection schedule Use condition : T73 Temperature 8 OC
15、 Ambient Use condition and heat treatment 19 20 173 4600 5 e I 4700 i wo 60 oc I e s 80 o( + 105OC I 0 I 125OC / 6h 5 t I24h + 172C1811820C/6ht18h Bending k- - Impact strength - 21 22 - - Characteristics Temperature 8 OC - Time h - 23 24 25 26 27 - - - I I I Stress oa MPa - C Elongation a YO - Ruptu
16、re stress UR MPa - Elongation at A % - rupture Notes (see line 98) - 16 I I Reduction of I Z I % I I I - area 17 I Hardness - I 18 I Shear strength I R, IMPaI - CEN PREN*3O 94 Is 3404589 0073257 99T y 2 23 MS / m 22 MS i m 5 y 23 MS / m y 22 MS /m Electrical conductivity Acceptable Acceptable if Rp0
17、,2 5 Rp0,2 min. L + 85 MPa or if y measured within 15 min of a re-solution treatment shows a loss of at least 3.5 MS / m from its initial value. Not acceptable otherwise. Not acceptable Stress corrosion Electrical conductivity External defects Y MS/m See EN 2082-3 Macrostructure (Grain flow) Hardnes
18、s Internal defects Batch uniformity 135 HB (typical value) 6 I 20 HB per product A I 30 HB per batch Designation Notes Typical use Page 5 prEN 3880 : 1994 EN 2004-1 Measurement on specimen for tensile test, flat machined surface if necessary See EN 2082-3, where a 2 25 mm In case of dispute o = 75% Rp0,2 min. L / t = 20 d See EN 2082-3 See EN 2082-3 See EN 2082-3 See EN 2082-3 See relevant drawing
