1、Edition approved for publication 31 March 1988 Comments should be sent within six months after the date of publication decision A.E.C.M.A. 88, Bd. Malesherbes 75008 PARIS -FRANCE C5 Chairman J.ODORIC0 prEN 2960 Page 3 1 Scope and field of application This standard specifies the requirements for bar
2、and wire to be used for the manufacture of machining fasteners for aerospace applications. The requirements in the condition of use are those which are to be met by the material supplied to the fastener manufacturer after full heat treatment. Unless otherwise indicated on the drawing, order or test
3、sheet, this standard is to be used in conjunction with the referenced EN standards. 2 References EN 2098-6, Inspection and testing requirements for titanium and heat resisting alloy wrought products - Part 6 - Inspection and testing requirements for bar and wire for fasteners - Aerospace series Roun
4、d bars - Heat resisting alloys machined - Diameter 12 mm 5 D 5 180 mm - Dimensions - Aerospace series Wikes - Heat resisting alloys - Diameter 0,2 mm 5 D 5 8 mm - Dimensions - Aerospace series. EN 2368, EN 2369, 1 AECMA PREN2960 BA W LOL23LL 0004564 - 0.- I Element Chemkai I c I si -t- -=-I- 0,lO I0
5、,15 Method of melting Vacuum melted and consumable electrode remelted Form Method of production Limit dlmenslons 5.1 Technical speclficatlon Bar for machining Cold worked - Straightened and ground 3 1210 I - 13 Reduction I of area l- - % 18 - I 350 4%5 385 - IHV I - Hardness Sheerstrength I & IMPa B
6、endlng k- Impact K - Temperature 1 f 1 Oc - Time h Elongation I a I % 5 20 Elongation -_ 3s Ine 98 AECMA PREN2960 AB = LOL23LL U004565 2 W _ 1 Grain size Designation Typical use prEN 2960 Page 5 . 2 Predominantly recrystallized grain size 3 or finer with isolated grains up to .25 mm (maximum dimensi
7、on) allowed The rules governing the designation of semi-finished products ate indicated in standard EN 2600. When the codified designation is used, the identification code shall be as follows : Material standard tiumber I !-Letter code (see 6.2) Appropriate dimensional standard code (see 5.3) Data c
8、oncerning dimension (see EN 2600) (i) Combination notched/unnotched test piece or separate notched and smooth test pieces. Rupture shall occur in the unnotched portion of the combined test piece. If separate test pieces are used, the time to rupture of the notched test piece shall exceed that of the unnotched test piece. Nuts, bolts and studs for engines
