1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2010 01 07 N-STATUS No replacement named J. Crist, NA 1983 05 28 Released P84T901/CENI/AF905129-10 Page 1 of 4 POLYCARBONATE - POLYBUTYLENE TEREPHTHALATE ESB-M4D442-A MOLDING COMPOUND NOT TO BE USED FOR NEW
2、DESIGN 1. SCOPE: The material defined by this specification is a polycarbonate - polybutylene terephthalate molding compound formulated for impact and solvent resistance. 2. APPLICATION: This specification was released originally for material used for painted plastic bumpers. 3. REQUIREMENTS: 3.1 IN
3、FRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts supplied to this specification. The spectra established for initial approval shall constitute the reference standard and shall be kept on file at Central
4、 Laboratory. All samples shall produce spectra that correspond to the reference standard when tested under the same conditions as those specified on the master spectrum. 3.2 MOLDING COMPOUND 3.2.1 Color Black 3.2.2 Flow Rate 12 - 14 g/10 min (ASTM D 1238, Procedure A, Condition “T“, except 5000 g To
5、tal Load) 3.3 MOLDED TEST SPECIMEN The following requirements are intended for initial source qualification, and Initial Sample Inspection Report. These will be rechecked at intervals specified by Quality Assurance. 3.3.1 Conditioning & Test Condition All test values indicated herein are based on sp
6、ecimens molded with 0.02% maximum Moisture Content (as determined ASTM D 789) and conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5% relative humidity for 24 h prior to testing and tested under the same controlled conditions. ENGINEERING MATERIAL SPECIFICATION ESB-M4D442-A Page 2 of
7、4 3.3.2 Specific Gravity 1.19 - 1.21 (ASTM D 792) 3.3.3 Tensile Strength, min 52 MPa (ASTM D 638, 5 mm/min) Elongation, min 120% 3.3.4 Flexural Modulus, min 1.9 - 2.3 GPa (ASTM D 790, 100 mm span, 2.5 mm/min) 3.3.5 Flexural Strength, min 72 - 93 MPa (ASTM D 790, 100 mm span, 2.5 mm/min) 3.3.6 Impact
8、 Strength, Izod, min (ASTM D 256, 6.4 x 12.7 mm mandatory size, except use solid samples for “unnotched“ test) Unnotched No break Notched . At 23 C 530 J/m . At -29 C 260 J/m 3.3.7 Deflection Temperature, min 96 C (ASTM D 648, 1.82 MPa) 3.3.8 Flammability, max 101 mm/min (FLTM BN 24-2, without the l
9、ot sampling plan) In addition, the test specimen shall not exhibit any flashing or sudden flaming on either surface in excess of the above maximum value. 3.3.9 Low Temperature Impact At -29 C 51 J Test Method: Specimens (3.2 mm thick) shall be conditioned at -29 C for 5 h minimum and subjected to 51
10、 J impact within 5 s after removal from the cold chamber. A Gardner Impact Tester, equipped with a 12.7 mm impact head and a 51 mm diameter base, shall be used for the test. A minimum of 3 specimens shall be impacted. A pass shall be defined as a slight tear, less than 12.7 mm, or no tear on the rev
11、erse side of the impact specimen. Any specimen which cracks more than 12.7 mm shall be defined as a failure. 3.3.10 Environmental Stress Crack Resistance (FLTM BO 27-3) Elongation after exposure 100% ENGINEERING MATERIAL SPECIFICATION ESB-M4D442-A Page 3 of 4 Test Method: Mount specimens on the fixt
12、ure bars at 0.7% maximum surface strain level. Immerse the assembly in Reagent Grade Reference Fuel B plus 15% Toluene by Volume for 5 min at 23 +/- 2 C. Release the strain from the test bars immediately upon removal from the fuel and allow to air dry, mount on the tensile machine fixture. Determine
13、 the elongation at break using a gage length of 25 mm and crosshead speed of 5 mm/min. Report all values for unexposed and exposed specimens and calculate the % change. 3.3.11 Vicat Softening Temperature, min 110 C (ASTM D 1525, Rate B) 3.4 MOLDED PART 3.4.1 Appearance Shall be uniform in density, t
14、exture and finish, free of visible porosity, warpage, heat scorch, checks, cracks, chipped edges and uneven surfaces. They shall also be free of other contamination. Appearance requirements for production parts shall be based on comparison with established master sample. 3.4.2 Regrind and/or Blended
15、 Material Must meet Q101 Appendix D, or limits as specified on the engineering drawing. 3.4.3 Additional Requirements Specific requirements for physical properties of molded parts shall be specified on the engineering drawing and/or engineering part specification. All critical areas with respect to
16、these properties shall be clearly designated on the engineering drawing. 3.4.4 Paintability The material when painted must meet the requirements of engineering performance specifications shown on the engineering drawing, using coating materials approved by the responsible product materials engineeri
17、ng office. 3.5 SUPPLIERS RESPONSIBILITY Material supplied to this specification must be equivalent to that originally approved. Changes in formulation or processing shall not be made without prior approval as described in Supplier Procedure I-A. ENGINEERING MATERIAL SPECIFICATION ESB-M4D442-A Page 4
18、 of 4 4. APPROVAL OF SUPPLIERS: Suppliers to this specification must be approved by the affected product engineering office. Procedure for gaining approval of a specific material to a new/existing ES-M specification is contained in Supplier Procedure I-A. Approved new suppliers will be added to the
19、Engineering Materials Approved Source List. 5. GENERAL INFORMATION: This data is for information only and is not a requirement. 5.1 MOLD SHRINKAGE 0.009 - 0.011 5.2 COEFFICIENT OF LINEAR THERMAL EXPANSION 9.0 x 10-5/ C (ASTM D 955) 5.3 FLEXURAL MODULUS (ASTM D 790) . At 60 C 1.1 - 1.6 GPa . At -29 C 1.9 - 2.6 GPa 5.4 FLEXURAL STRENGTH (ASTM D 790) . At 60 C 41.4 - 57 MPa . At -29 C 90 - 122 MPa
