1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 09 22 Revised See Summary of Revisions J. Souza, SA 2007 02 16 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.8, 3.9 & 4 1989 09 29 Released SM/EQ035825 M. Siewert Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC P
2、age 1 of 4 POLYAMIDE (PA) 6 MOLDING COMPOUND WSK-M4D672-A 1. SCOPE The material defined by this specification is a polyamide 6 molding compound. 2. APPLICATION This specification was released originally for material used for plugs. NOTICE: This material absorbs and retains moisture. Part design and
3、tolerances must accommodate changes in part dimensions and physical properties due to moisture absorption or loss in the service/assembly environment. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requir
4、ements For Production Materials (WSS-M99P1111-A). 3.3 CONDITIONING AND TEST CONDITIONS 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
5、to be sealed in containers that are impermeable to water vapor. If the moisture content 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 speci
6、mens shall not be removed from closed containers until immediately before testing. 3.4 MOLDING COMPOUND 3.4.1 Melt Temperature 215 - 225 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 injecti
7、on 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 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D672-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of
8、4 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 1.12 - 1.16 g/cm (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Yield, min 70 MPa
9、ISO R 527/ASTM D 638M, 150 x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute test speed) 3.5.3.1 Elongation at Yield, min 2% (Test Method according to para 3.5.3) 3.5.4 Flexural Modulus, min 2.4 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
10、 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) 3.5.5.1 At 23 +/- 2 C 4.5 kJ/m 3.5.5.2 At -40 +/- 2 C 4.0 kJ/m The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to i
11、mpact test. Low temperature testing shall be done within the cold box, if not possible, test can be conducted outside, but within 5 s. 3.5.6 Heat Deflection Temperature, min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) 3.5.6.1 At 1.82 MPa 55 C 3.5.6.2 At 0.45 MPa 165 C 3.5.7 Heat Aging Pe
12、rformance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 90 +/- 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) ENGINEERING MATERIAL SPECIFICAT
13、IONWSK-M4D672-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 4 3.5.7.1 Tensile Strength at Max Load, 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 355
14、 x 100 x 1.0 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min TBD Formation of excessive amounts of clear film or droplets is cause for rejection. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements
15、 of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 7.2 - 8.5-5/ 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 0.8 - 1.6% 5.2.2 Post Shrinkage (Separate specimens required fo
16、r each test) After 48 h at 80 C 0.1 - 0.3% After 30 minutes at 120 C 0.2 - 0.5% 5.3 WATER ABSORPTION 1.8 - 2.2% (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 spec
17、imen, 10 specimens minimum) 5.4.1 After Moisture Conditioning 50 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. EN
18、GINEERING MATERIAL SPECIFICATIONWSK-M4D672-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 4 of 4 6. SUMMARY OF REVISIONS 2009 09 22 Revised Item 3.5.3 - Tensile Strength at Yield, min Removed Item 3.5.5 Rate of Shear Modulus at 23 C ENGINEERING MATERIAL SPECIFICATIONWSK-M4D672-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 5 of 4
