1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 3 2011 03 21 Revised Changed Melt flow rate and tensile strength G. Kowalski, NA 2005 08 31 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1988 10 31 Released CF4SRD107002-201 J.B. Huebner Printed copies are uncontrolled Copyr
2、ight 2011, Ford Global Technologies, LLC Page 1 of 4 ACETAL (POM) COPOLYMER, MODIFIED, WSF-M4D618-A HIGH IMPACT GRADE 1. SCOPE The material defined by this specification is an impact-modified acetal copolymer thermoplastic. 2. APPLICATION This specification was released originally for material used
3、for in-tank fuel filter components. 3. REQUIREMENTS 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). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 4.0 -11.0 g/10 minutes
4、(ISO 1133/ASTM D 1238, 190 C, 2.16 kg) 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-end gated test specimens. The following dimensions are required: A. 150 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 31
5、67) 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 ISO 294. No annealing allowed. 3.5.2 Density 1.35 - 1.40 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensil
6、e Strength at Max Load 46 MPa, min (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed (unfilled), 5 mm/min (filled) ENGINEERING MATERIAL SPECIFICATION WSF-M4D618-A Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 2 of 4 3.5.3.1 Elon
7、gation at Break 17% min (Test Method according to para 3.5.3) 3.5.4 Flexural Modulus 1.7 GPa min (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 Report Value MPa (ASTM D 4065, forced constant amplitude, fixed frequency o
8、f 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 - 3 minutes minimum) Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +16
9、0 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 4. 3.5.6 Impact Strength, Izod (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 6.1 kJ/m2 min 3.5.6.2 At -40
10、+/- 2 C 3.5 kJ/m2 min 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. 3.5.7 Heat Deflection Temperature (ISO 7
11、5/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) 3.5.7.1 At 1.82 MPa 70 C min 3.5.7.2 At 0.45 MPa 130 C min 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 120 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination)
12、 3.5.8.1 Tensile Strength Change +/- 20% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 20% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATION WSF-M4D618-A Printed copies are uncontrolled Copyright 2011, Ford Global Tec
13、hnologies, LLC Page 3 of 4 3.6 FLAMMABILITY (ISO 3795) Burn Rate 100 mm/min max The specimen size required for material approval is 355 x 100 x 1.3 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (FLTM BO 116-03) Fog Number 60 min Formation of excessive amounts of clear film or droplets is cause for r
14、ejection. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 13 16-5/ C (ASTM D 696) 4.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection
15、molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 2.0 - 2.5% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.1 - 0.4% . After 30 min at 120 C 0.1 - 0.4% 4.3 WATER ABSORPTION 0.2 - 0.4% (ISO 62, 24 h/ASTM D 570, 24 h, 50 +/- 1 mm diameter, 3.2
16、 +/- 0.2 mm thick specimen) 4.4 HARDNESS, DUROMETER D 77 (ISO 868/ASTM D 2240) 4.5 DIMENSIONAL STABILITY The phrase “anneal after molding“ shall appear on engineering drawings when dimensional stability and/or improved frictional characteristics are engineering requirements. 5. SUMMARY OF REVISIONS 2011 03 21 Revised Melt Flow Rate range and Tensile Strength. Shear Modulus requirement changed to report only Renumbered ENGINEERING MATERIAL SPECIFICATION WSF-M4D618-A Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 4 of 4
