1、 ENGINEERING MATERIAL SPECIFICATION Material Name File Control No. Specification Number Date Release No. Release/Revision 2011 10 12 N Status Replaced by WSS-M4D1016-A1 G. Kowalski, NA 1989 08 22 OE00E00107002031 Released WP 3948-a Page 1 of 5 POLYAMIDE (PA) 66 MOLDING COMPOUND, 25 % WSF-M4D628-A GL
2、ASS FIBER REINFORCED, FLAME RETARDED NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a type 66 polyamide (nylon) molding compound containing flame retardant and reinforced with 25 % glass fibers. 2. APPLICATION This specification was released originally for mater
3、ial used for ISO relays. NOTICE: This material absorbs and retains moisture. Part design and tolerances must accommodate changes in part dimensions and physical properties due to moisture absorption or loss in the service/assembly environment. 3. REQUIREMENTS 3.1 STATISTICAL PROCESS Suppliers must c
4、onform to the requirements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as described therein is required for material/source approval. Appropriate statistical tools must be used to analyze process/product data so that variation in the final product is continuously reduce
5、d. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts supplied to this specification. The IR spectra and thermogram established for initial approval shall constitute the reference standard and shall
6、 be kept on file at the designated material laboratory. All samples shall produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material and specimens with
7、 moisture content not exceeding 0.2 % (test according to ISO R 960, Method B/ASTM D 789). ENGINEERING MATERIAL SPECIFICATION WSF-M4D628-A WP 3948-b Page 2 of 5 All test materials immediately after processing have to be sealed in containers that are impermeable to water vapor. If the moisture content
8、 exceeds 0.2 %, condition the material for a minimum of 16 h at 40 - 50 C at a reduced pressure below 133 Pa. Conduct tests in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity. Individual specimens shall not be removed from closed containers until immediately before testing. 3.
9、4 MOLDING COMPOUND 3.4.1 Glass Fiber Content 22.5 - 27.5 % (ISO 3451/4, at 600 +/- 25 C) 3.4.2 Melt Temperature, min 250 C (ISO 1218, Method B/ASTM D 789) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection molded one-en
10、d gated test specimens. The following dimensions are required: A. 150 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167) B. 120 x 10 x 4.0 +/- 0.2 mm Specimens with shorter dimensions shall be cut from the center portion of the test specimen A and/or B. The specimens shall be prepared according to IS
11、O 294. No annealing allowed. 3.5.2 Density 1.54 - 1.60 g/cm (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 110 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) 3.5.4 Flexural Modulus, min 7.6 GPa (ISO 178/ASTM D 790M, Method
12、 I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.5. Shear Modulus at 23 C Range TBD MPa/GPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15 %, strain level below 1 %. Specimen approx. 60 x 10 x 4.0 +/- 0.2 mm cut from the center of specimen A.) ENGI
13、NEERING MATERIAL SPECIFICATION WSF-M4D628-A WP 3948-b Page 3 of 5 Additionally, a Shear Modulus vs. Temperature curve shall be plotted for - 50 to + 240 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 6. 3.5.6 Impact Strength, Izod, min (
14、ISO 180, Method A/ASTM D 256, Method A, 63.5 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 640 J/m 3.5.6.2 At - 40 +/- 2 C TBD J/m 3.5.6.3 At - (TBD) +/- 2 C TBD J/m The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior
15、 to impact test. Low temperature testing shall be done within the cold box, if not possible, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature, min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) 3.5.7.1 At 1.82 MPa 232 C 3.5.7.2 At 0.45 MPa 256 C 3.5.8 Heat Ag
16、ing Performance (ISO 188/ASTM D 573, 1000 h at TBD +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8.1 Impact Strength, Izod Change +/- 20 % (Tes
17、t Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 0.8 +/- 0.1 mm with a smooth surface. 3.7 ADDITIONAL REQUIREMENTS Specific requirements for material and/or m
18、anufactured parts shall be specified on the Engineering drawing, Engineering parts specification and/or performance specifications. All critical areas with respect to these properties shall be clearly designated on the Engineering drawing. ENGINEERING MATERIAL SPECIFICATION WSF-M4D628-A WP 3948-b Pa
19、ge 4 of 5 3.8 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval was originally granted. Prior to making any change in the properties, composition, construction, color, processing or labelling of the mat
20、erial originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changes and obtain the written approva
21、l of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with the request. Substance restrictions imposed by law, regulations or Ford, apply to the materials addressed by this document. The restrictions are defined in Engineering Material Spe
22、cification WSS-M99P9999-A1, unless a different suffix (e.g., A2 or A3) is specified on the engineering document for the application. 4. APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approva
23、l of their materials shall first obtain an expression of interest from the affected Purchasing, Design and Materials Engineering activity. Upon request, the Supplier shall submit to the affected Materials Engineering activity its own laboratory report to the specification (test results, not nominal
24、values), the material designation and code number, and test specimens for Ford evaluation. Upon approval, the material will be added to the Engineering Material Approved Source List. 5. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements
25、 to the specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 2.4E-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C 0.4 - 0.8 % 5.2.2 Post Shrinkage (Separate specimens required for eac
26、h test) ENGINEERING MATERIAL SPECIFICATION WSF-M4D628-A WP 3948-b Page 5 of 5 After 48 h at 80 C TBD % After 30 min. at 120 C TBD % 5.3 WATER ABSORPTION TBD % (ISO 62, 24 h/ASTM D 570, 24 h, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) 5.4 IMPACT STRENGTH, IZOD, min (ISO 180, Method A/ASTM D
27、 256, Method A, 63.5 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens minimum) 5.4.1 After Moisture Conditioning TBD kJ/m The notched specimens shall be immersed for 48 h in distilled water at 50 +/- 1 C and subsequently conditioned for 1 h at 23 +/- 2 C and 50 +/- 5 % relative humidity prior to test and tested under the same conditions within 1 h. Shear Modulus vs. Temperature Plot - TBD
