1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2002 09 26 Revised Updated and renumbered 1993 02 25 NEO1E10127076081 Released J.C.Webster NAAO G.Lane EAO Printed copies are uncontrolled Page 1 of 2 Copyright 2002, Ford Global Technologies, Inc. VALVE INSER
2、T, Cr-Ni-Fe ALLOY WSE-M1A324-A3 1. SCOPE The material defined by this specification is a Chromium-Nickel-Iron alloy casting. 2. APPLICATION This specification was released originally for intake valve seat inserts. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers
3、and part producers must conform to the Companys Standard Requirements For Production Materials 3.2 CHEMICAL COMPOSITION, weight % (ASTM A 751/ASTM E 1019) Total Carbon 1.25 - 1.75 Manganese 0.2 - 0.6 Phosphorus 0.08 max Sulfur 0.08 max Silicon 1.9 - 2.6 Chromium 19.0 - 21.0 Nickel 1.0 - 1.6 Iron Bal
4、ance 3.3 HEAT TREATMENT 2.5 h at 730 - 740 C followed by air cooling to room temperature. 3.4 HARDNESS 35 - 45 HRC (ASTM E 18/ISO 4498) ENGINEERING MATERIAL SPECIFICATION WSE-M1A324-A3 Page 2 of 2 Copyright 2002, Ford Global Technologies, Inc. 3.5 MICROSTRUCTURE An even distribution of primary chromium carbides and secondary spherodized carbides in a ferritic matrix. 3.6 SURFACE CONDITION Surfaces shall be free of scale and rust. Nicks, cracks, burrs and depressions shall not exceed 0.25 mm in any direction. Visual inspection is to be performed under white light without aid of magnification.
