1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2014 02 12 N Status No replacement named. G. Weber, NA 2012 09 05 Revised Para 3.4.2, to align F/DxD with ASTM E10, ISO 6506,R. Davis, FOE 1994 08 18 EP00E10434711000 Released W. Janssen, EAO Controlled document at www.MATS Copyright 2
2、014, Ford Global Technologies, Inc. Page 1 of 2 ALUMINUM ALLOY, CASTING, HEAT TREATED CONDITION WSD-M2A143-A3 NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an aluminum - silicon - copper casting alloy in the as cast or as cast and heat treated condition. 2. APP
3、LICATION This specification was released originally for material used in the manufacture of engine cylinder heads and blocks by the precision sand casting process. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys St
4、andard Requirements For Production Materials (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSITION, (Weight%) Silicon 8.50 - 10.00 Copper 3.00 - 3.50 Magnesium 0.20 - 0.30 Manganese 0.30 - 0.50 Nickel 0.30 max Iron 0.80 max Titanium 0.13 - 0.17 Zinc 1.00 max Lead 0.10 max Tin 0.10 max Each Other Element 0.05 m
5、ax Total Other Elements 0.50 max Strontium 0.006 min and/or Sodium 0.004 min Aluminum Remainder The composition shall be selected from within the above range in order to meet castability, soundness, machinability consistency, microstructural and strength requirements. The specific composition limits
6、 and foundry practice to meet performance and manufacturing requirements will form part of the Control Plan for each individual component geometries and supplier. ENGINEERING MATERIAL SPECIFICATION WSD-M2A143-A3 Copyright 2014, Ford Global Technologies, Inc. Page 2 of 2 3.3 QUALITY 3.3.1 General The
7、 finished cylinder head must be free from laps, cold shuts, dross, sludge and eutectic segregation/depletion. Gas holes/porosity and shrinkage porosity assessment levels, visual and/or radiographic (ASTM E 155) methods, shall be subject of the control plan. 3.3.2 Microstructure The microstructure sh
8、all consist of primary alpha aluminum, alpha aluminum-silicon eutectic and inter-metallic constituents with no primary silicon precipitation. 3.4 MECHANICAL PROPERTIES Tensile and compression test samples shall be separately poured at the same time and from the same metal as the castings they repres
9、ent, or alternatively and when specified on the engineering drawing, machined from the component casting in the designated location. The mechanical properties shall be determined, after heat treatment to the same condition as that of the corresponding finished component. 3.4.1 Tensile Properties (AS
10、TM B 557/ISO 6892), min Tensile Strength 200 MPa 0.2% Proof Stress 150 MPa Elongation 0.7% 3.4.2 Hardness Brinell (ASTM E 10/ISO 6506, F/DxD = 10) Hardness shall be determined on the casting at the location shown on engineering drawing. Hardness Brinell 80 - 120 Note: The frequency and detail of mec
11、hanical testing will form part of the agreed Control Plan. 3.5 HEAT TREATMENT Casting will be subjected to a thermal cycle approximating to a solution treatment at 485 C for 4 hours followed by immediate air-quenching to below 250 C within 4 minutes. Subsequent ageing is not mandatory, property stab
12、ilization being complete in about 4 days through natural ageing. Process limits should be established to assure hardness and mechanical properties when recognizing the need to assure complete oxidation of internal core resins without the risk of uncontrolled casting distortion. The treatment parameters shall form part of the agreed Control Plan for the individual component. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications.
