1、AECMA PREN2394 80 LOL231L 0003LLb L 9 - A. E .C.M .A. STAN DAR D NORME A.E .C.M .A. A.E.C.M.A. NORM DRAFT prEN2399 Edition 1 May 1980 ENGLISH VERSION HEAT RESISTING STEEL FE-PA92-HT Rm 900 MPa BARS FOR FORGED BOLTS D 900 MP Dg25mm STANGEN ZUM WARMSTAUCHEN SERIE AROSPATIALE FR SCHRAUBEN D , 900 condi
2、tion Condition of use I Delivery condition Condition of us e (*Imm liniencions :oncerned I C 25 rhickness of :ladding on each face 1 3irection of sample .m - - -.- Room temp er ature I_ r I a 590 i3 590 - 3 900 + 900 I- IRP0,Z 31 l- I I 5 13 Elongation A 3 20 20 Reduction I Ha Hardness 6 200 248 ,C
3、HB -C 341- 248 HB d 341 - MPa snding J Impact Time I W W OC h MPa Wa (Eiongstion 1 A at rupture Notes , AECMA PREN2377 80 = L0123Ll 0003LLB 5 prEN2399 Page 4 ron destruct ive t estine Notes Typical use 2 3 4 0,065 or finer I 0,065 or finer Material. to be subjected to dye penetrant examination and a
4、ssessment Bracketed figures indicate composition expressed as parts per mil- lion (ppm). The method of analysis for lead shall be agreed between manufacturer and purchaser. The method of melting required shall be agreed between manufacturer and purchaser, Bars for machining are defined by EN2398. In
5、 preparation, After the softening treatment, all bars shall be reduced i5 to 25% in cross section during final drawing or rolling at a temperature of not more than 870. Combination notched/unnotched test piece; rupture shall occur in th unnotched portion of the test piece. Stess may be increased after 48 h to promote rupture. Bclts and nuts for airframe and englne uses
