1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2012 11 08 N-STATUS A2, A3, A4, A5 No longer in use. A. Wedepohl, NA 2003 08 20 Revised Para 3.0 inserted; Para 3.1, 3.2, 3.3, 3.14, 4 deleted 1999 06 21 Revised Add-A5 K. Pakkala 1993 03 31 NGA1E10269419002 Released A. Vallabhanath Controlle
2、d document at www.MATS Copyright 2012, Ford Global Technologies, Inc. Page 1 of 2 MAGNET, PERMANENT, THERMOPLASTIC BONDED, NON-ORIENTED WSF-M4L7-A2 MAGNET, PERMANENT, THERMOPLASTIC BONDED, NON-ORIENTED WSS-M4L7-A3 MAGNET, PERMANENT, THERMOPLASTIC BONDED, NON-ORIENTED WSS-M4L7-A4 MAGNET, PERMANENT, T
3、HERMOPLASTIC BONDED, NON-ORIENTED WSS-M4L7-A5 1. SCOPE NOT FOR NEW DESIGN A2, A3, A4, A5 The materials defined by these specifications are thermoplastic bonded, non-oriented, barium ferrite magnets. 2. APPLICATION These specifications were released originally to define materials used in speedometers
4、 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). A2 A3 A4 A5 3.4 SPECIFIC GRAVITY, g/cm3, min 3.0 1.70 2.3 N/A (ISO 1183, Method A/ASTM D 792) 3.5 H
5、ARDNESS, DUROMETER D, min 75 75 75 N/A (ISO 868/ASTM D 2240, instantaneous, plied-up specimen. Hand held durometers shall not be used) 3.6 TENSILE STRENGTH AT 23 C, MPa, min 11 11 29 N/A (ISO R 527/ASTM D 638M, 150 minutes x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/ minute test speed (unfilled), 5 mm/ mi
6、nute (filled) 3.7 FLEXURAL MODULUS, MPa, min 15 11 23 N/A (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) ENGINEERING MATERIAL SPECIFICATION WSF-M4L7-A2 WSS-M4L7-A3/A4/A5 Copyright 2012, Ford Global Technologies, Inc. Page 2 of 2 3.8 IMPACT STRENGT
7、H, IZOD, J/m, min (ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.8.1 At 23 +/- 2 C 10 10 10 N/A The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact test. Low temperature testing shall
8、be done within the cold box, if not possible, test can be conducted outside, but within 5 s. 3.9 HEAT DEFLECTION TEMPERATURE, 70 70 155 N/A C, min (ASTM D 648, at 0.45 MPa) 3.10 RESIDUAL INDUCTION (BR) 300 300 690 1480-1580 (ASTM A 34, at 20 C) 3.11 COERCIVE FORCE (HC) 300 300 640 1250-1350 (ASTM A 34, at 20 C) 3.12 INTRINSIC COERCIVE FORCE (Hci) 3400 2000 2000 2500-1350 (ASTM A 34, at 20 C) 3.13 MAXIMUM ENERGY PRODUCT (BHmax), N/A N/A N/A 0.55-0.6 MGOe
