1、CEN EN*3548 92 I 3404589 002594b 2 A.E.C.M.A. STANDARD NORME A.E.C.M.A. A.E.C.M.A. NORM ENGLISH VERSION Aerospace series Aluminium alloy AL-C21002 T7 Sand castings EN 3548 Issue February 1992 92/75832DC CEN EN*3548 92 W 34134589 0025947 4 E EN 3548 Page 3 O Introduction For the use of this standard,
2、 see EN 2500-2 1 Scope and field of application This standard specifies the requirements relating to sand castings in aluminium alloy AL-C21002, for use in the T7 condition, for aerospace applications. 2 References EN 2076-3 Aerospace series - Aluminium and magnesium alloy - Ingots and castings - Te
3、chnical specification - Part 3 - Pre-production and production castings EN 2500-2, Aerospace series - Instructions for the drafting and use of metallic material standards - Part 2 - Specific requirements for aluminium, aluminium alloys and magnesium alloys Previous page is blank 92/75832DC CEN ENx35
4、48 92 SP 3404589 00256148 b m prEN 3548 Page 4 5.1 Technical specification 5.2 Dimensional standards 6.1 Delivery condition and heat treatment and heat treatment Sampling Test piece Heat treatment Dimensions concerned I mm Thickness of cladding % on each face Direction of sample I - T E N s I L E -
5、Strength I Rm Elongation I A IL Red. area MPa Hardness Shear strength Rc MPa Bending k Impact strength - -, C R E E P I- Temperature Time Stress Elongation Rupture stress Elongation at rupture Notes (see line 98) ,- OC h ma % ma % AL-C21002 - T7 SAND CASTINGS DRAFT FEB 1992 Castings sand T7 510OC 8
6、520C / 2h t 5 5h + 52O0c 5 + 8:. ambient / t 2 24h + 180OC 5 8 5 190C / 4h 5 t 5 8h 5 530OC / 6h 5 t 24h / WQ 8 5 7OoC Delivery condition Characteristics 1) 92/75832DC CEN ENS3548 92 3404589 O025949 8 b AL-C21002 T7 SAND CACTINGS External defects Internal defects Batch uniformity Designation Notes Typical use DRAFT FEB 1992 prEN 3540 Page 5 See EN 2076-3 See EN 2076-3 See EN 2076-3 _ Hardness i10 HB (typical value) I AL 20 HB per batch I- I See relevant drawing 1) For greater thicknesses, values are to be agreed.
