1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Revisions1994 12 08 Revised and Retyped, was 11 pages1987 12 01 B/036765 TP Added clause 3.2, revised clause 3.13,3.1.6.1,3.41982 05 26 SM/EQ 9026 TP ReleasedWP 3948-a Page 1 of 6ABS MOLDING COMPOUND, VERY HIGH HEA
2、T RESISTANT SJ-M4D9792-AABS MOLDING COMPOUND, VERY HIGH HEAT RESISTANT SJ-M4D9792-B1. SCOPEThe material defined by this specification is a very high heat resistantacrylonitrile-butadiene-styrene molding compound.2. APPLICATIONThe material was originally released for manufacturing of instrumentcluste
3、r bezel.3. REQUIREMENTSNote: The material shall be conditioned for a minimum of 24 h at 23 +/- 2C and 50 +/- 5 % relative humidity prior to test and tested under the sameconditions unless otherwise specified. The minimum and maximum values ofthis specification are based on natural colored and pigmen
4、ted material.3.1 REQUIREMENTS FOR TEST SPECIMENSAll tests shall be carried out on injection molded specimens with theexception of clause 3.1.6. The test specimens may be eithercompression molded, injection molded or extruded.Preparation of Injection Molded Test Specimens:Preparation of specimens acc
5、ording to ISO 294. The optimum moldingconditions shall be as recommended by the supplier of the moldingcompound. Test specimens must not be annealed.3.1.1 Density, Natural Colored 1.04 - 1.07 Mg/m3(ISO R 1183, Method A)This range may be exceeded by pigmented material.3.1.2 Yield Point, min 50 MPa(IS
6、O R 527, Type 1, thickness ofspecimen: 3.0 - 3.2 mm, testspeed: 50 mm/minute)3.1.3 Izod Impact Strength, Notched(ISO R 180, specimen size: 63.5 x12.7 x 3.2 mm, number of specimen:min 10 for each test)At 23 C, min 100 J/mAt - 40 C, min 35 J/mNote: The test specimens must be injection molded in the ab
7、ovementioned size with front end gating and shall not be cut fromlarger test specimens. Maximal fin 0.1 mm.ENGINEERING MATERIAL SPECIFICATION SJ-M4D9792-A SJ-M4D9792-BWP 3948-a Pag e 2 of 6The test specimens must be stored 6 - 8 h at - 40 C prior tocold impact test. Testing shall be done within the
8、cold box,if not possible, test can be conducted outside, but within 3seconds.3.1.4 Shear Modulus(ISO R 537, Method A, specimensize: 60 x 10 x 1 mm)At 23 C 940 - 1270 MPaAdditionally a shear modulus curve shall be plotted from - 50 Cto + 140 C and shall be within the tolerance range shown onpage 7. A
9、t least one measurement at 5 C intervals is necessaryto establish the curve.Note: The test specimens must be injection molded in the abovementioned size with front end gating and shall not be cut fromlarger test specimens.3.1.5 Vicat Softening Point, At 49 N, min 112 C(ISO 306, specimen size: 10 x 1
10、0 x3.2 mm, in silicone oil, except dialgauge is set to zero after weighthas been added, to be measured withweight force of 49 N increase ofbath temperature 50 +/- 5 C/h.Specimen cut from center of tensilebar)Test Conditions: Specimen dry as injection molded in case thatspecimens cannot be tested imm
11、ediately after molding, they haveto be kept in a sealed air moisture proof container filled withsilica gel.3.1.6 Flammability3.1.6.1 SK-M4D9792-A(ISO 3795)Burn Rate, max 100 mm/minuteUnless specified on drawing. 3.1.6.2 SK-M4D9792-B(FLTM EU-BN 24-2)Burn Rate, max 100 mm/minuteNote to Flammability:Th
12、e flammability shall be determined on 100 x 355 mmspecimens with a thickness of 1.8 - 2.0 mm and smoothsurface.ENGINEERING MATERIAL SPECIFICATION SJ-M4D9792-A SJ-M4D9792-BWP 3948-a Pag e 3 of 6In order to comply with Federal Motor Vehicle SafetyStandard No. 302, the materials, portions ofcomponents,
13、 and composites shall not burn or transmit aflame across their surface, at a rate of more than 100mm/minute. To demonstrate compliance, the sample sizeand method of testing shall be in accordance with FLTMEU-BN 24-2.3.1.6.2.1 Performance - Environmental AgeingRequirementAll materials, portions of co
14、mponents, andcomposites defined by this specificationthat have not been treated, modified orreformulated, and exceed a maximum burnrate of 75 mm per m as specified by theFlammability Lot Sampling Plan of FLTMEU-BN 24-2, must be evaluated forpermanency of the materials flameretardant properties per S
15、K-M99P9500-A,Table 1 according to the acceleratedenvironmental ageing requirementsapplicable to the basic material categoryof this particular specification.Any material, portions of components, andcomposites defined by this specificationthat have been treated, modified orreformulated to conform to F
16、lammabilityLot Sampling Plan of FLTM EU-BN 24-2,regardless of maximum burn rate, must beevaluated for both permanency ofmaterials flame retardant properties andchanges in mechanical, chemical andphysical properties per SK-M99P9500-A,Table 1 applicable to the basic materialcategory of this particular
17、 specification.3.2 SPECIAL REQUIREMENTS3.2.1 Accelerated Weather Resistance Rating 4, 200 SFH(FLTM BN 1-1, Fadometer)This requirement applies only for self-colored material indesign approved interior colors and is omitted for naturalcolored material.After exposure the material shall show no fading o
18、r colorchange in excess of specified AATCC rating (AATCC Gray Scalefor Evaluating Change in Color, 10 step). In addition, thereshall be no cracking, crazing or other deterioration. A slightloss of gloss or deposit will be allowed provided an acceptableappearance can be achieved by washing with water
19、 and milddetergent (ratio 95:5 by volume).Specimen size: 100 x 70 x 3.0 +/- 0.2 mmSpecimens to be molded in a high gloss polished mold.ENGINEERING MATERIAL SPECIFICATION SJ-M4D9792-A SJ-M4D9792-BWP 3948-a Pag e 4 of 63.3 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its op
20、tion, may conduct infrared and/orthermal analysis of material/parts supplied to this specification.The IR spectra and thermograms established for initial approval shallconstitute the reference standard and shall be kept on file at thedesignated material laboratory. All samples shall produce IR spect
21、raand thermograms that correspond to the reference standard when testedunder the same conditions.3.4 SUBSTANCE CONTROLLegal, health, safety and environmental constraints may apply to thematerials which are submitted for approval to this specification.Refer to the Engineering Material Specification W
22、SS-M99P9999-A1.3.5 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent in allcharacteristics to the material upon which approval was originallygranted.Prior to making any change in the properties, composition,construction, color, processing or labeling of the mate
23、rialoriginally approved under this specification, whether or not suchchanges affect the materials ability to meet the specificationrequirements, the Supplier shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the written approval of t
24、he Materials Engineering activity.Test data, test samples and a new code identification are to besubmitted with the request.Substance restrictions imposed by law, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Materials Specification
25、 WSS-M99P9999-A1.4. APPROVAL OF MATERIALSMaterials defined by this specification must have prior approval by theresponsible Materials Engineering activity. Suppliers desiring approvalof their materials shall first obtain an expression of interest from theaffected Purchasing, Design and Materials Eng
26、ineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity a completed copy of their laboratory test reports, signed by aqualified and authorized representative of the test facility, demonstratingfull compliance with all the requirements of this specifica
27、tion (testresults, not nominal values), the material designation and code number, andtest specimens for Ford evaluation. Fords engineering approval of amaterial will be based on its performance to this specification and on anassessment of suitability for intended processes and/or applications. Upona
28、pproval, the material will be added to the Engineering Material ApprovedSource List.5. GENERAL INFORMATIONThe information given below is provided for clarification and assistance inmeeting the requirements of this specification.ENGINEERING MATERIAL SPECIFICATION SJ-M4D9792-A SJ-M4D9792-BWP 3948-a Pa
29、g e 5 of 65.1 FLEXURAL MODULUS, min 2500 MPa(ISO 178, tangent, specimen size:80 x 10 x 4 mm)Sr -Factor 0.015.2 MELT INDEX, min 1.5 g/10 minutes(ISO R 1133, except at 220 +/- 0.5 Cwith a weight force of 98.1 N)5.3 COEFFICIENT OF LINEAR THERMAL EXPANSION, max 8 x 10E-5 1/C(ASTM D 696)5.4 MOLD SHRINKAGE 0.3 - 0.7 %(ASTM D 955, after 48 h)ENGINEERING MATERIAL SPECIFICATION SJ-M4D9792-A SJ-M4D9792-BWP 3948-a Pag e 6 of 6
