1、 ENGINEERING MATERIAL SPECIFICATION Material Name File Control No. Specification Number Date Release No. Released 04/12/10 N-STATUS Replaced by WSS-M4D643-B1 V. Cerato, EU 1989-05-19 SM/EQ9548 TP Released L. Rodigas WP 3948-a Page 1 of 6 POLYPROPYLENE (PP), HOMOPOLYMER, SMT5004DA8800 WSK-M4D644-A 40
2、 % MINERAL FILLED, CONTROLLED RHEOLOGY (CR) GRADE NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a 40 % mineral filled injection molding compound based on polypropylene homopolymer with controlled rheologic properties. 2. APPLICATION This specification was relea
3、sed originally for material used for air conditioning housing. 3. REQUIREMENTS 3.1 STATISTICAL PROCESS Suppliers must conform 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 stati
4、stical tools must be used to analyze process/product data so that variation in the final product is continuously reduced. 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 specific
5、ation. The IR spectra and thermograms established for initial approval shall constitute the reference standard and shall 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 co
6、nditions. 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 96 h prior to testing and tested under the same conditions unless otherwise specified. ENGINEE
7、RING MATERIAL SPECIFICATION WSK-M4D644-A WP 3948-b Page 2 of 6 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 12 - 18 g/10 minutes (ISO 1133/ASTM D 1238, 230 C, 2.16 kg) 3.4.2 Mineral Content 35 - 40 % (ISO 3451/1, Method A, talc filler 30 minutes at 550 +/- 50 C, test portion 1 to 2 g) 3.5 MOLDED TEST S
8、PECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection molded one-end 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
9、dimensions shall be cut from the center portion of the test specimen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.19 - 1.25 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 24 MPa (ISO R 527/ASTM D 638
10、M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) 3.5.4 Flexural Modulus, min 3.6 GPa (ISO 178/ASTM D 790M, Method 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 tbd MPa/GPa (ASTM D 4065, forced constant amplitude, fixed frequency of
11、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. Additionally, a Shear Modulus vs. Temperature curve shall be plotted for - 50 to + 160 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range s
12、hown on page 6. ENGINEERING MATERIAL SPECIFICATION WSK-M4D644-A WP 3948-b Page 3 of 6 3.5.6 Impact Strength, Izod, min (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 2.0 kJ/m2 3.5.6.2 At - 40 +/- 2 C 1.4 kJ/m2 The test
13、specimens must be conditioned for minimum of 6 h at the above specified temperature prior 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
14、.0 +/- 0.2 mm specimen) 3.5.7.1 At 1.82 MPa 67 C 3.5.7.2 At 0.45 MPa 118 C 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 1000 h at 140 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8.1 Tensile Strength Change +/- 15 % (Test Method per p
15、ara 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 15 % (Test 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 1.0 +/- 0.1 mm with a smooth surface. 3.7 ADDITI
16、ONAL REQUIREMENTS Specific requirements for material and/or manufactured 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.
17、 ENGINEERING MATERIAL SPECIFICATION WSK-M4D644-A WP 3948-b Page 4 of 6 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, composi
18、tion, construction, color, processing or labelling of the material 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 ac
19、tivity of the proposed changes and obtain the written approval 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 docum
20、ent. The restrictions are defined in Engineering Material Specification 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 responsib
21、le Materials Engineering activity. Suppliers desiring approval 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 labor
22、atory report to the specification (test results, not nominal 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
23、 for clarification and assistance in meeting the requirements to the specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 5 - 10E-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 0.5-
24、0.9 % 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 0 - 0.15 % Ater 30 minutes at 120 C 0.1 - 0.3 % 5.3 ELONGATION AT BREAK, min 8 % (Test Method according to para 3.5.3) 5.4 HARDNESS, DUROMETER D, min 68 (ISO 868/ASTM D 2240, 15 s dwell) 5.5 DETERMINATION OF CR
25、-GRADE Melt Flow Rate - Ratio, max tbd Calculation of Melt Flow Rate - Ratio: B/A x 100 ENGINEERING MATERIAL SPECIFICATION WSK-M4D644-A WP 3948-b Page 5 of 6 A - Melt Flow Rate at 190 C and 0.325 kg B - Melt Flow Rate at 190 C and 10.0 kg Test Method for A and B according to ISO 1133 5.6 IMPACT STRE
26、NGTH, IZOD, min (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) 5.6.1 At 10 +/- 2 C 1.6 kJ/m2 The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior 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. ENGINEERING MATERIAL SPECIFICATION WSK-M4D644-A WP 3948-b Page 6 of 6
