1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 09 22 Revised Para 3.0 inserted, para 3.1, 3.9 and 4 deleted 2001 03 05 Revised Added para 3.8, rev para 3.3 & updated N. Heath 1995 05 11 Activated J. M. Showalter Printed copies are uncontrolled Copyright 2003, Ford Global Technologies,
2、 Inc. Page 1 of 4 ALUMINUM ALLOY, SHEET, HEAT TREATABLE, MILL SURFACE WSB-M2A152-A1 1. SCOPE The material defined by this specification is a stampable, heat treatable 6xxx series autobody aluminum sheet alloy. 2. APPLICATION This specification was originally released for material used for stamped bo
3、dy panels, particularly where a combination of formability and age hardening at low paint oven temperatures (170 - 180 C) is required. Note: The yield strength of the material after the paint operation depends on the amount of forming deformation and the specific paint bake process. 3. REQUIREMENTS
4、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). 3.2 CHEMICAL COMPOSITION (ASTM E 34/ASTM E 101/ASTM E 227/ASTM E 607/ASTM E 1251) The determination of the chemical c
5、omposition can be made with chemical, spectrochemical or x-ray fluorescence, in accordance with the above standards. In case of the dispute, the umpire method shall be ASTM E 34. Silicon 0.20 - 1.70 Iron 0.70 max Copper 0.90 max Manganese 0.80 max Magnesium 0.10 - 1.40 Chromium 0.35 max Zinc 0.25 ma
6、x Titanium 0.25 max Others, each 0.05 max Others, total 0.15 max Aluminum Remainder ENGINEERING MATERIAL SPECIFICATIONWSB-M2A152-A1Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 2 of 4 3.3 MECHANICAL PROPERTIES, T4 or T41 TEMPER (ASTM B 557M, thickness 0.6 - 2.0
7、mm) and (ASTM E 646) The following specified properties are to be measured on samples cut parallel, transverse and 45 to the rolling direction. As received: Yield Strength (0.2% offset), min, MPa 110* Tensile Strength, min, MPa 230 Elongation, min, % 22 n-value, min (over full curve from 1% 0.23 - u
8、niform elongation) *The supplier must demonstrate capability of producing to a yield strength range of 50 MPa. Established range will be detailed on the Aluminum Suppliers Control Plan. 3.4 ADHESIVE AND SEALANT PERFORMANCE REQUIREMENTS (For applications where adhesives and sealants are required) Mat
9、erial supplied to this specification shall demonstrate acceptable adhesive and sealant performance per the material specifications and the adhesive and sealant compatibility procedures identified by Materials Engineering. 3.5 PAINTABILITY Material supplied to this specification must have prior appro
10、val for paintability by the responsible Materials Engineering activity. This approval shall be based on samples prepared to the local process and resistance requirements appropriate to the country of Ford vehicle manufacture, or to the relevant Engineering Performance Specification. Material supplie
11、d to European Automotive Operations (EAO) shall meet the requirements of WSK-M2P136-A. Material supplied to North American Automotive Operations (NAAO shall meet the following requirements: . Material intended for Class 1 surface applications shall meet the requirements of ESB-M2P130. . Material int
12、ended for Class 2 and 3 surface applications shall meet the requirements of ESB-M2P129. A Class 1 surface shall be specified for parts of the body or front end sheet metal that are exposed after paint or trim. A Class 2 surface shall be specified for parts of the body not covered by trim materials b
13、ut exposed to view when the car doors or enclosure lids are in an open position. Class 3 surface specifications are parts that are wholly or partially concealed during normal use of the vehicle. Parts such as fender aprons, floor pans and unexposed underbody structural members are typical parts that
14、 would be specified as Class 3. ENGINEERING MATERIAL SPECIFICATIONWSB-M2A152-A1Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 3 of 4 3.6 WELDABILITY (FLTM BA 113-07) The weldability of WSB-M2A152-A1 shall meet the performance requirements outlined in FLTM BA 113-
15、07. 3.7 FORMABILITY The quality level of aluminum alloy supplied to fabricate a specific component is to be negotiated between the Manufacturing activity and the aluminum supplier. Acceptance of subsequent orders by the aluminum supplier for a given component at the agreed upon quality level implies
16、 that all aluminum supplied will form that part satisfactorily as defined by the Manufacturing activity. 3.8 SHELF LIFE The material properties given in this specification shall be valid for a period of six months from the date of manufacture (final thermomechanical processing stage). 5. GENERAL INF
17、ORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 INITIAL SUPPLIER APPROVAL For initial approval, the supplier must furnish the following information: . A plan detailing how each requirement of para 3 will be cont
18、rolled on a continuing basis. . Test results from a typical production sample for the requirements outlined in para 3. . Test results from typical production samples for paintability requirements outlined in para 3.5. . Mechanical property histograms including mean and standard deviations values. Da
19、ta shall consist of a minimum of 40 measurements for each property, in para 3.3, taken from a minimum of 20 coils while the process is operating in statistical control. Upon approval, the material will be added to the Engineering Material Approval Source List. 5.2 TYPICAL PROPERTIES IN AS RECEIVED C
20、ONDITION After 2% strain and bake at 180 +/- 5 C for 15 minutes at temperature. Yield Strength, Typical, MPa 220 5.3 YIELD STRENGTH vs STRAIN AND BAKE CYCLE This specification was initially developed with data derived from samples subjected to various strains followed by a bake at different temperat
21、ures. The following matrix is presented to illustrate the effect of varying bake times and temperatures on the yield strength. ENGINEERING MATERIAL SPECIFICATIONWSB-M2A152-A1Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 4 of 4 AFTER HEAT AGING 15 MINUTES AFTER H
22、EAT AGING 30 MINUTES Strain (%) Bake Temp (C) UTS (MPa) YIELD STRENGTH (MPa) ELONG. (%) UTS (MPa) YIELD STRENGTH (MPa) ELONG. (%) 0 25 287 152 26.8 - - - 0 160 299 169 27.2 304 176 26.7 0 170 300 174 26.2 309 189 25.5 0 180 302 181 25.3 312 198 24.5 0 190 305 192 23.8 323 223 21.9 0 200 317 219 20.1
23、 335 251 19.0 1 25 - 177 - - - - 1 160 304 196 25.2 309 206 25.3 1 170 304 200 25.7 313 217 24.0 1 180 307 208 24.0 317 225 23.4 1 190 312 222 21.6 329 253 20.4 1 200 323 246 19.9 342 280 18.1 2 25 - 195 - - - - 2 160 308 212 24.9 313 220 23.7 2 170 310 217 23.7 317 231 22.9 2 180 312 223 23.1 321 240 22.7 2 190 317 237 21.6 335 269 19.8 2 200 328 261 19.3 349 299 16.8 5 25 - 232 - - - - 5 160 322 247 21.5 323 253 22.3 5 170 323 251 22.9 333 266 20.6 5 180 326 257 20.5 336 274 19.4 5 190 333 273 19.7 350 302 17.5 5 200 346 299 16.2 362 329 14.4
