1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2014 12 17 N Status Replaced by WSS-M2A123-B1 C. Mracna, NA 2009 01 29 Revised See Summary of Revisions C. Mracna, FNA 1982 04 12 Released CEM2-896861-C Copyright 2014, Ford Global Technologies, Inc. Page 1 of 2 ALUMINUM ALLOY (A356-T6
2、) MODIFIED, CAST WHEEL ESA-M2A123-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a permanent mold cast aluminum alloy (A356-T6). 2. APPLICATION This specification was released originally for material used for cast aluminum automotive wheels. 3. REQUIREMENTS 3.
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). 3.1 CHEMICAL COMPOSITION The chemical composition of the aluminum wheel must conform to SAE J452 A356.0. Except, Stront
4、ium 0.01 - 0.04% (Used to Modify Silicon). The chemical composition of the casting shall be checked per procedures outlined in ASTM B108 and in accordance with suitable chemical (ASTM Method E34), or spectrochemical (ASTM Method E607, E1251). Metal may consist of a blend of both primary and secondar
5、y materials. 3.2 MECHANICAL PROPERTIES, (T6 Temper) (ASTM B557 and E10) 3.2.1 Yield Strength, min 114 MPa (0.2% Offset) 3.2.2 Tensile Strength, min 214 MPa 3.2.3 Elongation, min 7% 3.2.4 Hardness (500 Kg, 10 mm ball) 60 BHN min. 3.3 HEAT TREATMENT T6 Temper. A modified T6 heat treatment cycle is per
6、missible with demonstration of compliance to required mechanical properties. NOTE: Casting may be mechanically straightened after solution and quench, but not after the artificial aging treatment. ENGINEERING MATERIAL SPECIFICATION ESA-M2A123-A Copyright 2014, Ford Global Technologies, Inc. Page 2 o
7、f 2 3.3 MICROSTRUCTURE (ASTM E3) Microstructure of this material shall consist of primary alpha aluminum dendrites surrounded by fine Al-Si eutectic particles as viewed at 200X magnification. The silicon particles shall be rounded, which indicates proper modification and heat treatment. 4. GENERAL I
8、NFORMATION 4.1 SUMMARY OF REVISIONS 2009 01 29 Deleted defined wheel chemistry from section 3.1. Replaced with ASTM J452, A356.0. In section 3.2, replaced SAE J416B (cancelled) with ASTM B557. Added ASTM E10 to section 3.2.4 Added ASTM E3 to section 3.3 Deleted the following statement from section 3.4: “Each supplier shall compare the microstructure to master samples which are approved by the affected Product Engineering Office.“
