1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 02 12 N-STATUS No replacement named S. Ryzyi, NA 2003 09 23 Revised Para 3.0 inserted; 3.1, 3.6, 3.7 and 4 deleted 1994 11 04 NE01E10127076148 Released P. Lee Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, Inc.
2、Page 1 of 3 ALUMINUM ALLOY, COLD FORMED, HEAT TREATED WSE-M2A159-A1 NOT TO BE USED FOR NEW DESIGN 1. SCOPE This specification defines an Al Si Cu cold forging alloy that is cold worked in the annealed condition and subsequently heat treated. 2. APPLICATION This specification was originally released
3、for the manufacture of direct acting mechanical bucket type tappets produced by the cold forging process. 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
4、A). 3.2 CHEMICAL COMPOSITION (Weight %) Silicon 11.0 - 12.5 Iron 0.2 - 0.3 Copper 4.0 - 4.6 Manganese 0.5 - 0.7 Titanium 0.2 max Zinc 0.5 max Aluminum Balance 3.3 QUALITY 3.3.1 The finished component must be free from material discontinuities, inclusions and segregation. 3.3.2 Microstructure The mi
5、crostructure shall consist of predominantly fine silicon eutectic and metallic compounds in the aluminum. There may be small areas of dendritic alpha aluminum but no primary silicon should be visible. ENGINEERING MATERIAL SPECIFICATIONWSE-M2A159-A1 Printed copies are uncontrolled Copyright 2010, For
6、d Global Technologies, Inc. Page 2 of 3 3.4 MECHANICAL PROPERTIES 3.4.1 Tensile Properties (20 C) (ASTM E 8M/ISO 6892) Ultimate Tensile Strength, min 400 MPa Yield Strength (.2% Offset), min 300 MPa Elongation, min 1% The values above are to be measured on test bars machined from the same bar stock
7、as the cold forgings which they represent. The mechanical properties shall be determined after heat treatment to the same condition as that of the corresponding finished component. The frequency and detail of mechanical testing will form part of the agreed Control Plan. 3.4.2 Hardness (unless otherw
8、ise stated on Engineering drawing) (ASTM E 10/ISO 6506) Hardness, min. HRB 78 (as heat treated) 3.5 HEAT TREATMENT Components will be subjected to heat treatment to achieve the required mechanical properties. The heat treatment shall include a solution heat treatment at 480 to 510 C for 4 - 8 hours,
9、 followed by a precipitation hardening treatment at 160 - 180 C for 4 - 10 hours. Treatment parameters shall form part of the agreed Control Plan for the individual component. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements
10、of this specification. 5.1 MECHANICAL, DYNAMIC AND ELEVATED TEMPERATURE PROPERTIES 5.1.1 Fatigue Strength (Rotating Bending 10xE7 cycles), typical data at 20 C. (R.R. MOORE FATIGUE TEST) Min, MPa 157 5.1.2 Fatigue Strength (Rotating Bending 10xE7 cycles), typical data at 130 C, after conditioning fo
11、r 100 hours. (R.R. MOORE FATIGUE TEST) Min, MPa 132 5.1.3 Fatigue Strength (Rotating Bending 10xE7 cycles) typical data at 170 C, after conditioning for 100 hours. (R.R. MOORE FATIGUE TEST) Min, MPa 96 ENGINEERING MATERIAL SPECIFICATIONWSE-M2A159-A1 Printed copies are uncontrolled Copyright 2010, Fo
12、rd Global Technologies, Inc. Page 3 of 3 5.1.4 Impact Strength (Charpy, U-notch), typical data at 20 C. (ASTM E 23) Impact Strength, J/mm23.25 5.1.5 Tensile Properties, typical data at 130 C, after conditioning for 100 hours. (ASTM E 21) Tensile Strength, min, MPa 392 Yield Strength, min, MPa 366 Elongation, min, % 7.0 5.2 PHYSICAL PROPERTIES 5.2.1 Density - 2.73 g/cc3at 20 C. 5.2.2 Modulus of Elasticity = 82,320 MPa at 20 C. 5.2.3 Coefficient of Thermal Expansion = 19.6 x (10xE6)/K (at 20 - 150 C) 5.2.4 Thermal Conductivity = 155 W/(mK)
