1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 01 2014 06 20 A1 -N Status /Revised See Summary of Revisions C. Mracna, NA 2013 11 06 Released C. Mracna,NA Controlled document at www.MATS Copyright 2014, Ford Global Technologies, LLC Page 1 of 8 ALUMINUM ALLOY, SHEET, HEAT TREATABLE, S
2、TRUCTURAL, WSS-M2A175-A1 HIGH STRENGTH, THIN GAGE NOT TO BE USED FOR NEW DESIGN ALUMINUM ALLOY, SHEET, HEAT TREATABLE, STRUCTURAL, WSS-M2A175-A2 HIGH STRENGTH, THICK GAGE ALUMINUM ALLOY, SHEET, HEAT TREATABLE, STRUCTURAL, WSS-M2A175-A3 HIGH STRENGTH, LOW COPPER ALUMINUM ALLOY, SHEET, HEAT TREATABLE,
3、 STRUCTURAL, WSS-M2A175-A4 ENERGY ABSORPTION ALUMINUM ALLOY, SHEET, HEAT TREATABLE, STRUCTURAL, WSS-M2A175-A5 OVERAGED 1. SCOPE The materials defined by these specifications are for direct cast, 6000 series, heat treatable aluminum sheet. Ford Motor Company may, at its option and in agreement with t
4、he local or regional supplier, define additional and/or restricted technical delivery requirements such as mechanical properties, forming characteristics, and/or pretreatment for a specific grade and/or part. The defined requirements shall be mandatory and no characteristics shall conflict with thes
5、e engineering specifications. 2. APPLICATION These global specifications were released originally for stamped automotive body parts. 2.1 LIMITATIONS The yield strength of the material in the part after the paint baking process is a function of the amount of forming deformation and the time-temperatu
6、re profile during the paint baking process. The mechanical property values shown in Table 2 apply only to the listed condition; individual parts will have different properties, depending on specific processing in the vehicle manufacturing plants. 2.2 DEFINITIONS Variant A1 is a structural alloy with
7、 gage thicknesses less than or equal to 1.5 mm, typically applied to non-visible structural parts (Class 3) where high strength and modest ductility are required. This variant is applicable to parts that may be susceptible to intergranular corrosion or stress corrosion cracking, or parts that will b
8、e heat treated after forming. Variant A2 is a structural alloy typically applied to non-visible structural parts (Class 3) where high strength and modest ductility are required. This variant is applicable to parts that may be susceptible to intergranular corrosion or stress corrosion cracking, or pa
9、rts that will be heat treated after forming. ENGINEERING MATERIAL SPECIFICATION WSS-M2A175-A1/A2/A3/A4/A5 Copyright 2014, Ford Global Technologies, LLC Page 2 of 8 Variant A3 is a low copper, structural alloy with gage thicknesses 0.8 to 4.0 mm, typically applied to non-visible structural parts (Cla
10、ss 3) where high strength and modest ductility are required. This variant is applicable to parts that may be susceptible to intergranular corrosion or stress corrosion cracking, or parts that will be heat treated after forming. Variant A4 is an energy absorption alloy, typically applied to non-visib
11、le structural parts (Class 3) where controlled in-service deformation behavior and thermal stability are desired. Variant A5 is a high formability, structural alloy with gage thicknesses greater than 1.5mm, typically applied to non-visible structural parts (Class 3). This variant is applicable for p
12、arts having design features that require the material to be stamped in O temper and subsequently require heat treatment to a strengthened T72 temper. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Require
13、ments for Production Materials (WSS-M99P1111-A). Material suppliers and part producers must conform to the Companys Quality System Requirements. In order for materials to comply with the requirements of the material specification they shall be sourced from suppliers listed in the Ford Motor Company
14、Approved Source List, ASL (See also paragraph 4.2). 3.2 CHEMICAL COMPOSITION (ASTM E34, ASTM E716, ASTM E1251) 3.2.1 Chemical Composition The upper and lower limits of chemical composition of the controlled elements shall be established by the supplier by any of the listed methods and included in th
15、e Suppliers Control Plan. In case of dispute, the referee method shall be ASTM E34. The tabulated upper and lower limits of chemical composition for each variant may not agree with those listed in the Aluminum Association “Teal Sheets.“ The values in Table 1 take precedence. Ladle analyses shall be
16、provided as part of the initial material source approval process in a format suitable for upload into the Ford Material Database. Table 1: Ladle Chemical Composition (weight percent maximum, unless shown as a range or a minimum; balance Al) A1/A2 A3 A4 A5 Si 0.55 0.95 0.50 1.00 0.30 - 0.60 0.45-0.75
17、 Fe 0.30 0.30 0.30 0.60 Cu 0.50 - 0.80 0.20 0.20 0.20-0.30 Mn 0.30 0.15 0.15 0.10 Mg 0.55 - 0.95 0.40 - 0.80 0.40 - 0.70 0.75-1.00 Cr 0.10 0.05 0.05 0.05-0.25 Zn 0.10 0.10 0.10 0.10 Ti 0.10 0.10 0.10 0.10 Others (each) 0.05 0.05 0.05 0.05 Others (total) 0.15 0.15 0.15 0.15 ENGINEERING MATERIAL SPECI
18、FICATION WSS-M2A175-A1/A2/A3/A4/A5 Copyright 2014, Ford Global Technologies, LLC Page 3 of 8 3.3 MECHANICAL PROPERTIES (ASTM E8M, ASTM B557M, 50 mm gauge length; ASTM E517, FLTM BB 114-02) Mechanical properties are valid in the longitudinal, transverse, and diagonal directions, except as noted. Cert
19、ification of ongoing production material shall be in accordance with regional and/or local requirements. In cases of dispute, test data obtained from supplier retained samples that have been stored under environmentally controlled conditions will serve as the arbitrator. The samples shall be tested
20、at a third party laboratory. Mechanical properties shall be valid for a period of between thirty (30) and ninety (90) days following solution heat treatment unless otherwise noted. For the determination of mechanical properties, the material cross sectional area shall be defined as that of the alumi
21、nium alloy; contribution of any surface treatments to the calculated cross-sectional area used for stress calculations is neglected. The test specimen geometry and orientation relative to the rolling direction are to be established locally to certify on going production material. Yield Strength is d
22、efined as 0.2% proof stress. Yield strength and ultimate tensile strength shall be measured per ASTM B557M. Uniform elongation shall be measured per ASTM E8, Sec. 7.9.3 or 7.9.3.2. In cases of dispute, section 7.9.3 shall be the umpire method. Plastic Strain Ratio (r-value) is defined for a specific
23、 test direction with respect to the rolling direction. It is measured at 10% elongation. Normal anisotropy (r-bar, ravg, or rm) is calculated from the individual r-values per ASTM E517. Yield Strength (T81, T82, Revised 6HS3 Sec. 3.3.1 Added clarifying paragraph to Lot Release Limits Sec. 4.4 Revised typical mechanical property values
