1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2012 02 03 N Status Replaced by WSS-M4D741-B1 G. Kowalski, NA 2006 01 13 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1990 12 03 Released EP00E01031542000 L. Rodigas Controlled document at www.MATS Copyright 2012, Ford Glo
2、bal Technologies, LLC Page 1 of 5 POLYPROPYLENE (PP) HOMOPOLYMER WSK-M4D741-A2 COOLING AGENT RESISTANT NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an injection molding compound based on polypropylene homopolymer with resistance to cooling agents and remains t
3、ranslucent when exposed to cooling agent at boiling temperature. 2. APPLICATION This specification was released originally for material used for parts of engine cooling system such as overflow bottle etc. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part
4、producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 0.2 - 3.0 g/10 minutes (ISO 1133/ASTM D 1238, 230 C, 2.16 kg) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all
5、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 dimensions shall be cut from the center portion of the test specimen A and/
6、or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 0.89 - 0.91 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) ENGINEERING MATERIAL SPECIFICATION WSK-M4D741-A2 Copyright 2012, Ford Global Technologies, LLC Page 2 of 5 3.5.3 Tensile Strength at Yield, min
7、 28 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed) 3.5.3.1 Elongation at Yield, min 7% (Test Method according to para 3.5.3) 3.5.4 Flexural Modulus, min 1.1 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support sp
8、an) 3.5.5 Shear Modulus at 23 C 420 - 620 MPa (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. Specimen length between clamps 35-40 mm. Soak time at each temperature interval
9、- 3 minutes minimum). Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +150 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. 3.5.6 Impact Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 63.5 x
10、 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 4.0 kJ/m2 3.5.6.2 At -40 +/- 2 C 1.2 kJ/m2 3.5.6.3 At 10 +/- 2 C 2.5 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
11、 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 48 C 3.5.7.2 At 0.45 MPa 80 C ENGINEERING MATERIAL SPECIFICATION WSK-M4D741-A2 Copyright 20
12、12, Ford Global Technologies, LLC Page 3 of 5 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 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 at Yield Change +/- 15% (Test Method
13、per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change, max -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
14、RESISTANCE TO COOLANT AND WATER (50/50) (FLTM BO 130-01, 1000 h at 120 +/- 2 C, 10 test specimens minimum, engine coolant acc.to WSE-M97B44-B and/or approved coolant of affected model year - see para 5.3. Unaged property values shall be determined at the time of the aged properties determination) 3.
15、7.1 Tensile Strength at Yield Change +/- 15% (Test Method per para 3.5.3) 3.7.2 Impact Strength, Izod Change, max -15% (Test Method per para 3.5.6.1, specimens to be notched before immersion) 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting t
16、he requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 10 - 20-5/ 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 1.8% ENGINEERING MATERIAL SPECIFICATION WSK-M4D7
17、41-A2 Copyright 2012, Ford Global Technologies, LLC Page 4 of 5 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.2 - 0.5 . After 30 min at 120 C 0.0 - 0.5 5.3 For information on currently approved service fluids and other materials required for use in this spec
18、ification contact: Materials Laboratory 15/GM-D01-D Fluids Material Section Research and Engineering Center Coolants/Greases Ford Motor Company Ltd Engine Engineering Laindon, Basildon Ford Motor Co. Essex SS15 6EE, England PO Box 2053 21500 Oakwood Blvd. Dearborn, MI 48121, USA Materials Engineering Product Engineering Office Ford Motor Co. of Australia Ltd Princes Highway, Norlane Victoria 3214, Australia ENGINEERING MATERIAL SPECIFICATION WSK-M4D741-A2 Copyright 2012, Ford Global Technologies, LLC Page 5 of 5
