1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 09 23 Revised Para 3.0 inserted; para 3.1, 3.5 and 4 deleted 1994 09 01 EP00E10349705000 Revised para. 3.3 W. Janssen 1994 04 08 EP00E10394926000 Released W. Janssen Printed copies are uncontrolled Copyright 2003, Ford Global Technologies
2、, Inc. Page 1 of 1 SPECIAL BRASS, Ni-Al-Co-Alloy WSK-M2A156-A2 1. SCOPE The material defined by this specification is a Ni-Al-Co-alloyed brass in the forged and stress relieved condition. 2. APPLICATION This specification was released originally for material used for manufacturing synchronizer rings
3、. 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 %) Copper 59.50 - 62.00 Silicon 1.00 - 1.70 Iron 0.50 - 1.00 Mang
4、anese 0.50 - 1.00 Nickel 2.50 - 3.50 Aluminum 3.40 - 4.10 Lead 0.20 - 0.80 Cobalt 0.90 - 1.80 Zinc Remainder 3.3 MECHANICAL PROPERTIES Hardness shall be measured on finished part. Hardness HB 2.5/62.5 200 - 220 3.4 MICROSTRUCTURE The microstructure shall consist of beta-phase (grain size 4 or finer) with evenly disposed spheroidal grains of Co, Si, Fe, Mn intermetallic compound, and a small percentage (less 5%) alpha - phase.
