1、A. E .C .M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM prEN2070 Part 7 Edition 1 February 1987 ENGLISH VERSION Aerospace series Aluminium and aluminium alloy wrought products - Technical specification - Part 7 - Wrought forging stock Srie arospatiale Demi-produits corroys en aluminium et alliages
2、 daluminium - Spcification technique - Partie 7 - Produits corroys destins la forge Luft- und Raumfahrt Halbzeug aus Aluminium und Aluminium- Knetlegierungen - Technische Lieferbedingungen - Teil 7 - Schmiedevormaterial This industrial standard for the aerospace sector has been drawn up under the re
3、sponsibility of AECMA (Associa tion Europenne des Constructeurs de Matriel Arospatial). It is published on yellow paper in three equivalent versions (English, French, German). It will be submitted to CEN (European Committee for Standardization) as a draft European Standard. . b !A ; - U a C c U ! 5
4、U u E U L c $ i E C O O U F L Approved by The eqoivaient versions in French and German languages COMITE DE NORMALISATION can be supplied by 6.NA.E 8, rue Moreau-Vauthier Of A.E.C.M.A. 1987-02-01 92100 BOULOGNE-BILLANCOURT -FRANCE. I AECMA PREN2070-07 7 W 1012311 0007638 7 Page 2 Contents 9 10 Scope
5、and field of application References Batch size Dimensions External defects Internal defects Tensile test Back end defect and peripheral coarse grain zone Special tests Mark in g r I AECMA PREN2070-07 87 9 LOL23LL O007637 7 E 1 Scope anc field of application prEN2070-7 Page 3 The present standard spe
6、cifies the particular requirements of wrought products for the production of forgings in aluminium and aluminium alloys, This standard shall be used in conjunction with EN207-1. 2 References Aerospace series - Test methods for m Tensile tests at ambient temperature allic materials - Part 1 - Pf EN20
7、02-1, EN2004-2, Aerospace series - Test methods for aluminium and aluminium alloys products - Part 2 - Ultrasonic testing of plates, forgings and extrusions EN2070-1, Aerospace series - Aluminium and aluminium alloy wrought products - Technical Specification - Part 1 - General requirements EN2070-2,
8、 Aerospace series - Aluminium and aluminium alloy wrought products - Technical specification - Part 2 - Sheet, strip, formed profiles and plate . Aerospace series - Aluminium and aluminium alloy wrought products - Technical specification - Part 3 - Bars and extrucions EN2C7-3, 1) EN2715, Aerospace s
9、eries - Macrographic examination of aluminium and aluminium alloy forging stock - Forging and wrought products . 3 Batch size A batch of forging stock shall consist of material of the same cross-section from Che same cast. A cast is defined in EN2070-1. 1) In preparation AECIA PREN2070-07 7 = LOL23L
10、L 0007640 5 prEN2070-7 Page 4 4 Dimensions Dimensions and tolerances shall be agreed between the manufacturer and the purchaser and shall be specified on the order or on the inspection schedule. The frequency of examination adopted by the manufacturer shall be sufficient to permit him to certify com
11、pliance with the requirements, 5 External defects Visual surface inspection shall be carried out in the delivery condition. The surface of the forging stock shall be clean and free from defects such as cracks, laps, scratches, corrosion, considered harmful to its use. Surface defects may be removed
12、provided the forging stock dimensions remain within any tolerances that may be specified. 6 Internal defects If required by the order or the inspection schedule products having dimensions in accordance with table 1 shall be ultrasonically tested in accordance with EN2004-2 and shall, unless otherwis
13、e specified, meet the requirements of class A. If the material is ultrasonically testedin o condition different from the condition of supply, this shall be subject to agreement between rcanufacturer and purchaser and shall be specified on the order, inspection or manufacturing schedule. 7 Tensile te
14、st The condition of the material shall comply with the relevant material standard. The tensile test shall be carried out in accordance with Eh2002-1 on test samples heat treated in full section or after forging to 3G mm diameter. Tests shall be performed OE proportional round test pieces of the form
15、 and one of the sizes indicated in EK2002-1. ;.- ea Th AECMA PREN2070-07 7 L0123LL dire ti n of t material standard. st ample shall b in prEN2070-7 Page 5 f th quir emen t ordance with the r SamplSng frequency shall be in accordance with table 1. The test results shall comply with the relevant mater
16、ial standard. 8 Back end defect and peripheral coarse grain zone If the product is obtained by extrusion macrographic examination shall be carried out on a cross section cut from the back end of the extrusion at a frequency sufficient to ensure that the entire batch meets the requirement of this sta
17、ndard. The material shall be tested in accordance with EN2715 and the samples shall be solution heat treated prior to testing. The extrusion shall be free from back end defect and unless otherwise agreed between the manufacturer and the purchaser the maximum thickness of the peripheral coarse grain
18、zone.shal1 be as specified by the material standard, the order or the inspection schedule. Where necessary, the product may be machined to meet the requirements. 9 Special tests Special tests and inspections may be required by the purchaser. In such cases, after agreement between purchaser and manuf
19、acturer, the nature of test, method, number and acceptance standards shall be specified on the order or the inspection schedule. 10 Marking Marking shall be in accordance with EN2070-1 and EN2070-2 or EE2070-3 as appropriate. If special tests in accordance with clause 9 are required the marking shal
20、l be defined an.d shall reflect these extra requirements. The frequency of examination adopted by the manufacturer shall be sufficient to permit him to certify compliance with the requirements. AECMA PREN2070-07 7 = LO12311 0007642 9 E .- prEN2070-7 Page 6 O a, v) 3 m o al al v) f - al v) 3 m o a, a, - v, I - I s O O ? m S +i v) al S O o o) UJ c .- t .- +i n - I - - m 3 v) 5 zu w +- u 3 U O Q U a, U X W L 2 +- v) o 3 U a +- E - v) o 3 U O i- L n - I (D v) u al al U 4- Lc Y (o al E
