1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 10 09 Revised Para 3.0 inserted; para 3.1, 3.5 and 4 deleted 1990 08 07 C10087617 Revised 3.2 R.A.C/N.P.R EAO R.S.G NAAO 1988 02 25 SM/ER2760TC Final Release N.P.RILEY, EAO Printed copies are uncontrolled Copyright 2003, Ford Global Techn
2、ologies, Inc. Page 1 of 2 PLATINUM, PLATINUM ALLOYS, ELECTRODE WSD-M6A104-A1 WSD-M6A104-A2 1. SCOPE The materials defined by these specifications cover a series of grain stabilized Platinum and Platinum Alloys. 2. APPLICATION These materials were released originally for center and side electrodes in
3、 spark plug “long life“ applications. 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). 3.2 CHEMICAL COMPOSITION (Weight Percent) A1 A2 Platinum * 99.8
4、 min 95.3 min Tungsten - 3.5 - 4.6 Zirconium 0.1 max 0.1 max Yttrium 0.15 max 0.15 max Impurities 0.1 max 0.1 max * Alternatively can be calculated by difference. Chemical composition will form part of the agreed control plan. 3.3 HARDNESS (ISO 6507/2 (ASTM E 384) A1 A2 HV (100 to 500 grams) 90 - 13
5、0 270 - 300 The processing route and optimum mechanical properties for fabrication, welding and service performance shall form part of the agreed control plan. 3.4 MICROSTRUCTURE The as-received microstructure shall be a fibrous/elongated, single phase structure. To assess the effectiveness of the g
6、rain growth inhibitors, a test piece shall be heated at 800 C for 30 minutes, after which the test piece should continue to show a fibrous/elongated structure. ENGINEERING MATERIAL SPECIFICATIONWSD-M6A104-A1/A2Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 2 of 2
7、 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of these specifications. 5.1 RESISTIVITY (ASTM B 193-87) A1 A2 micro ohms.cm (typical) 10 37 5.2 TENSILE PROPERTIES (typical) (ISO 6892/ASTM E 8M) A1 A2 Ultimate Tensile Strength MPa 125 700 Elongation % 30 10
