1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 01 2014 06 20 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 7 ALUMINUM ALLOY, SHEET, HEAT TREATABLE, ENHANCED HEMMI
2、NG WSS-M2A174-A1 ALUMINUM ALLOY, SHEET, HEAT TREATABLE, ENHANCED BAKE RESPONSE WSS-M2A174-A2 1. SCOPE The materials defined by these specifications are for thin gage, direct cast, 6000 series aluminum sheet with enhanced temper response. Ford Motor Company may, at its option and in agreement with th
3、e local or regional supplier, define additional and/or restricted technical delivery requirements such as mechanical properties, forming characteristics, and pretreatment, for a specific grade and/or part. The defined requirements shall be mandatory and no characteristics shall conflict with these e
4、ngineering 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-temperature
5、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 an enhanced hemming alloy,
6、 typically applied to outer body panels (Class 1) that require small hem radii. Variant A2 is an enhanced bake response alloy, typically applied to outer body panels (Class 1) that require good formability and improved dent and ding behavior. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION
7、MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements 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
8、material specification they shall be sourced from suppliers listed in the Ford Motor Company Approved Source List, ASL (See also paragraph 4.2). ENGINEERING MATERIAL SPECIFICATION WSS-M2A174-A1/A2 Copyright 2014, Ford Global Technologies, LLC Page 2 of 7 3.2 CHEMICAL COMPOSITION (ASTM E34, ASTM E716
9、, 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 the Suppliers Control Plan. In case of dispute, the referee method shall be ASTM E34. The tabulated
10、 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 provided as part of the initial material source approval process in a format suitable for upload
11、into the Ford Material Database. Table 1: Ladle Chemical Composition (weight percent maximum, unless shown as a range or a minimum, balance Al) 3.3 MECHANICAL PROPERTIES (ASTM E8M, ASTM B557M, 50 mm gauge length; ASTM E517; FLTM BB 115-01) Mechanical properties are valid in the longitudinal, transve
12、rse, and diagonal directions, except as noted. Certification 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 se
13、rve as the arbitrator. The samples shall be tested 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 s
14、ectional area shall be defined as that of the aluminium 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 certif
15、y on going production material. Yield Strength is defined as 0.2% proof stress. Yield strength and ultimate tensile strength shall be measured per ASTM B557M. Yield Strength (T81) is defined and measured per FLTM AB 107-01 at 30 days. Uniform elongation shall be measured per ASTM E8M, Sec. 7.9.3 or
16、7.9.3.2. In cases of dispute, section 7.9.3 shall be the umpire method. A1/A2 Si 0.50 1.00 Fe 0.30 Cu 0.20 Mn 0.15 Mg 0.40 - 0.80 Cr 0.10 Zn 0.10 Ti 0.10 Others (each) 0.05 Others (total) 0.15 ENGINEERING MATERIAL SPECIFICATION WSS-M2A174-A1/A2 Copyright 2014, Ford Global Technologies, LLC Page 3 of
17、 7 Plastic Strain Ratio (r-value) is defined for a specific 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. Strain Limit for Flat Hemming is defined and measured p
18、er FLTM BB 115-01. Table 2: Mechanical Properties (minimum, unless shown as a range or maximum) A1 A2 Yield Strength, MPa 95 - 135 105 145 Yield Strength at 180 days*, MPa, max 145 155 Ultimate Tensile Strength, MPa 195-260 200 - 270 Uniform Elongation, % 19 19 ravg 0.50 0.50 r45 0.30 0.30 Yield Str
19、ength Increase After T81, MPa 40 50 Strain Limit for Flat Hemming, %, max 15 7 * The max yield strength between 90 and 180 days shall be determined via linear interpolation from the yield strength at 90 days and 180 days. 3.3.1 Lot Release Limits The supplier shall propose initial lot release values
20、 that will be used prior to addition to the ASL. The final lot release requirements shall be agreed upon between the supplier and Ford Materials Engineering during initial mechanical property testing and included into the source approval. For any lot release property that is reported as an average o
21、f three measured directions (L, D, & T), the individual directional measurements shall also be reported on the lot release certification. 3.3.2 Ongoing Mechanical Property Testing For ongoing production, the testing frequency shall be agreed upon annually between the supplier, Ford Product Developme
22、nt and Ford STA. It will include all of the properties listed in Table 2 and be available upon request. 3.4 DIMENSIONS AND DIMENSIONAL TOLERANCES 3.4.1 Thickness and Thickness Tolerance Unless otherwise specified by Ford Motor Company on the Engineering Drawing or Purchase Order, the tolerance for t
23、hickness shall comply with ESBAU5-1N260-(*) (*) latest level 3.4.2. Other Dimensional Tolerances Length, width, flatness, camber, out-of-square, mass and other tolerances for the material as delivered by the aluminum alloy supplier are defined by the relevant local manufacturing activity. Examples i
24、nclude ANSI H35.2 and EN 485-4. ENGINEERING MATERIAL SPECIFICATION WSS-M2A174-A1/A2 Copyright 2014, Ford Global Technologies, LLC Page 4 of 7 3.5 FORMABILITY In conjunction with the material supplier and Ford Materials Engineering, the affected local manufacturing activity shall, as part of the init
25、ial material source approval process, approve the formability of this material by means of laboratory test(s), manufacturing trial(s), and/or another mutually acceptable alternative, using the equipment and methods that are proposed for production. If needed to enable the fabrication of a specific c
26、omponent, restricted tolerances and/or additional material property requirements (i.e., the “quality level“ of the aluminum alloy) shall be developed by the affected manufacturing activity and the aluminum alloy supplier. Examples include, but are not limited to: restricted yield strength range, res
27、tricted gauge tolerance, and specified surface roughness. The “quality level“ of the aluminum alloy for a specific component: shall not conflict with specified requirements in paragraph 3 of this Engineering Material Specification shall be described in detail by the local manufacturing activity shal
28、l be a mandatory extension of these Engineering Material Specifications Acceptance of subsequent orders by the aluminum alloy supplier for a given component at the agreed upon quality level implies that all aluminum alloy supplied will be of a comparable quality level and will form that part satisfa
29、ctorily as defined and recorded by the manufacturing activity. 3.6 JOINABILITY (FLTM BB 113-07, FLTM BV 101-07, SAE J1523, ISO 4587) In conjunction with the material supplier and Ford Materials Engineering, the affected local manufacturing activity shall, as part of the initial material source appro
30、val process, approve the joinability (e.g., resistance spot welding, riveting, adhesive bonding) of this material by means of laboratory test(s), manufacturing trial(s), and/or another mutually acceptable alternative, using the equipment and methods that are proposed for production. If needed to ena
31、ble the fabrication of a specific component, restricted tolerances and/or additional material property requirements (i.e., the “quality level“ of the aluminum alloy) shall be developed by the affected manufacturing activity and the aluminum alloy supplier. Examples include, but are not limited to: r
32、estricted chemical composition, restricted gauge tolerance, and specified surface condition. The “quality level“ of the aluminum alloy for a specific component: shall not conflict with specified requirements in paragraph 3 of this Engineering Material Specification shall be described in detail by th
33、e local manufacturing activity shall be a mandatory extension of these Engineering Material Specifications Acceptance of subsequent orders by the aluminum alloy supplier for a given component at the agreed upon quality level implies that all aluminum alloy supplied will be of a comparable quality le
34、vel and can be joined satisfactorily as defined and recorded by the manufacturing activity. ENGINEERING MATERIAL SPECIFICATION WSS-M2A174-A1/A2 Copyright 2014, Ford Global Technologies, LLC Page 5 of 7 3.7 SURFACE APPEARANCE, CONDITION, AND SURFACE ROUGHNESS 3.7.1 Surface Classification Surface appe
35、arance shall be defined as Class 1 or Class 3: A Class 1 surface shall be specified for parts of the vehicle that are exposed to view after paint or trim. A Class 3 surface shall be specified for parts of the vehicle that are concealed during normal use. 3.7.2 Incoming Lubricant Products coated with
36、 a designated mill-applied lubricant shall comply with performance specification WSS-M9G24-A1. 3.7.3 Pretreatment Mill-applied pretreatments shall comply with performance specification WSS-M10P12-B1 and shall be applied in conjunction with the compatible mill-applied lubricant defined in paragraph 3
37、.7.2. 3.7.4 Surface Roughness The surface roughness and associated parameters for a given component are to be defined and recorded, if necessary, by the regional manufacturing activity. 3.7.5 Final Product Identification Unless an alternate method is agreed upon by the aluminum supplier and the manu
38、facturing activity, the final product in coil form (individual coil, up to a 2-mult from a master coil at least) shall comply with ESDU5A-1B328-(*). (*) latest level 3.8 PAINTABILITY In conjunction with the material supplier and Ford Materials Engineering, the affected local manufacturing activity s
39、hall, as part of the initial material source approval process, approve the paintability (e.g., compatibility, appearance, performance) of this material by means of laboratory test(s), manufacturing trial(s), and/or another mutually acceptable alternative, using the equipment and methods that are pro
40、posed for production. If needed to enable the fabrication of a specific component, restricted tolerances and/or additional material property requirements (i.e., the “quality level“ of the aluminum alloy) shall be developed by the affected manufacturing activity and the aluminum supplier. Examples in
41、clude, but are not limited to specified surface roughness and surface condition. The “quality level“ of the aluminum alloy for a specific component: shall not conflict with specified requirements in paragraph 3 of this Engineering Material Specification shall be described in detail by the local manu
42、facturing activity shall be a mandatory extension of these Engineering Material Specifications Acceptance of subsequent orders by the aluminum alloy supplier for a given component at the agreed upon quality level implies that all aluminum alloy supplied will be of a comparable quality level and can
43、be painted satisfactorily as defined and recorded by the manufacturing activity. ENGINEERING MATERIAL SPECIFICATION WSS-M2A174-A1/A2 Copyright 2014, Ford Global Technologies, LLC Page 6 of 7 3.9 METHOD OF SPECIFYING The specification on the Engineering Drawing, CAD file, or related documents shall i
44、nclude the base aluminum alloy and, as applicable, the surface classification, mill-applied pretreatment, and mill-applied lubricant. e.g. An Aluminum Alloy, Sheet, Heat Treatable, Enhanced Hemming, pretreated and pre-lubed at the mill, for a visible exterior body panel would be defined thus: Alumin
45、um to WSS-M2A174-A1, Class 1, pretreated to WSS-M10P12-B1, lubricated to WSS-M9G24-A1. 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 Specificati
46、ons. 4.1 REFERENCE DOCUMENTS The reference documents are: External Standards: ANSI H35.2 Dimensional Tolerances For Aluminum Mill Products ASTM E8M Test Methods for Tension Testing of Metallic Materials ASTM E34 Standard Test Methods for Chemical Analysis of Aluminum and Aluminum-Base Alloys ASTM E5
47、17 Test Method for Plastic Strain Ratio r for Sheet Metal ASTM B557M Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products ASTM E716 Standard Practices for Sampling and Sample Preparation of Aluminum and Aluminum Alloys for Determination of Chemical Compos
48、ition by Spectrochemical Analysis ASTM E1251 Standard Test Method for Analysis of Aluminum and Aluminum Alloys by Atomic Emission Spectrometry EN 485-4 Aluminium and aluminium alloys. Sheet, strip and plate. Tolerances on shape and dimensions for cold-rolled products ISO 4587 Adhesives - Determinati
49、on of Tensile Lap-Shear Strength of Rigid-to-Rigid Bonded Assemblies SAE J1523 Metal to Metal Overlap Shear Strength for Automotive Type Adhesives Ford Material / Engineering Standards: ESBAU5-1N260-(*) Sheet Metal Gauges & Thickness Tolerances ESDU5A-1B328-(*) Aluminum Material Labeling FLTM BB 113-07 Welding Acceptance Test for Aluminum FLTM BV 101-07 Stress Durability Test for Adhesive Lap-Shear Bonds FLTM BB 115-01 Flat Hem Test Procedure for Aluminum Alloy Sheet
