1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 08 N-STATUS No replacement named J. Crist, NA 2005 10 25 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.7, 3.8 & 4 1989 10 30 Released NB00I10043054002 LWM BCF GAM A. K. Christoff Printed copies are uncontrolled Copyright 2010, Ford Global
2、Technologies, LLC Page 1 of 5 POLYAMIDE (PA) 66, IMPACT MODIFIED, WSB-M4D662-A 20% PTFE POWDER FILLED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a type 66 impact modified polyamide (nylon) molding compound, filled with PTFE powder for added
3、lubricity. 2. APPLICATION This specification was released originally for material used for door window guides. 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
4、service/assembly environment. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Material
5、s (WSS-M99P1111-A). 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 24 h prior to testing and tested under the same conditions unless otherwise specified
6、. All test values indicated herein are based on material and specimens with moisture content not exceeding 0.2% (test according to ISO 960, Method B/ASTM D 789). All test materials immediately after processing have to be sealed in containers that are impermeable to water vapor. If the moisture conte
7、nt exceeds 0.2%, condition the material for a minimum of 16 h at 40 - 50 C at a reduced pressure below 133 Pa. 3.4 MOLDING COMPOUND 3.4.1 PTFE Content 18 - 22% (ASTM E 1131, TGA on 15-25 mg sample, 100 - 750 C temperature range, 20 C/min heating rate, nitrogen atmosphere at 100 +/- 5 cm/min flow rat
8、e) 3.4.2 Melt Temperature 250 - 260 C (ISO 1218, Method B/ASTM D 789) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D662-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 5 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all t
9、ests 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/o
10、r B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.19 - 1.24 g/cm (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Yield, min 47 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 Elongat
11、ion at Yield, min 10% (Test Method acc. to para 3.5.3) 3.5.4 Flexural Modulus, min 1.9 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 560 - 840 MPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/
12、- 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 +240 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on pa
13、ge 5. 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 7.8 kJ/m 3.5.6.2 At -40 +/- 2 C 3.5 kJ/m 3.5.6.3 At 0 +/- 2 C 3.9 kJ/m ENGINEERING MATERIAL SPECIFICATIONWSB-M4D662-A Printed copies a
14、re uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 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
15、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 65 C 3.5.7.2 At 0.45 MPa 210 C 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 1000 h at 120 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator
16、 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 Tensile Strength Change +/- 25% (Test Method per para 3.5.3) 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 3
17、55 x 100 x 2.5 +/- 0.1 mm with a smooth surface. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 4.7-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx.
18、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% 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 0.3% After 30 min. at 120 C 0.4% ENGINEERING MATERIAL SPECIFICATIONWSB-M4D662-A Printed copies are uncontrol
19、led Copyright 2010, Ford Global Technologies, LLC Page 4 of 5 5.3 WATER ABSORPTION 0.8% (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 256, Method A, 63.5 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens minim
20、um) 5.4.1 After Moisture Conditioning 12 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. ENGINEERING MATERIAL SPECIFICATIONWSB-M4D662-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5
