1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2010 01 08 N-STATUS No replacement named J. Crist, NA 2000 10 26 Revised Updated A. Cockman 1988 10 12 SM/EQ7754TP Released P. Kuntze Printed copies are uncontrolled Page 1 of 6 Copyright 2010, Ford Global T
2、echnologies, Inc. POLYBUTYLENE TEREPHTHALATE (PBT) WSK-M4D622-A IMPACT MODIFIED, 45 % GLASS FIBRE REINFORCEDMOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a 45 % glass fiber reinforced and PET modified thermoplastic polyester molding compound ba
3、sed on polybutylene terephthalate (PBT), with improved surface finish, less dimensional distortion and increased melt flow rate. 2. APPLICATION This specification was released originally for material used for door lift brackets. 3. REQUIREMENTS Material specification requirements are to be used for
4、initial qualification of materials. 3.1 QUALITY SYSTEM REQUIREMENTS Material suppliers and part producers must conform to the Companys Quality System Requirements. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS IR spectra and thermograms established for initial approval shall constitute the
5、reference standard and shall be kept on file at the designated material laboratory. All samples shall produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on
6、 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. ENGINEERING MATERIAL SPECIFICATION WSK-M4D622-A Page 2 of 6 Copyright 2010, Ford Global Technologie
7、s, Inc. 3.4 MOLDING COMPOUND 3.4.1 Glass Fiber Content 43 - 47 % (ISO 3451/2, at 750 +/- 50 C, test portion 2.5-3.0 g) 3.4.2 Melt Flow Rate 10 - 20 g/ (ISO 1133/ASTM D 1238, 10 minutes 260 +/- 0.5 C, 2.16 kg) The material shall be dried for 4 h minimum at 130 - 135 C in a mechanical convection oven
8、immediately preceding the test. 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 3167) B.
9、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 1.67 - 1.72 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Streng
10、th at Max Load, min 170 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/minute test speed) 3.5.4 Flexural Modulus, min 12.0 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 tbe (ASTM D 4065, f
11、orced 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.) ENGINEERING MATERIAL SPECIFICATION WSK-M4D622-A Page 3 of 6 Copyright 2010, Ford Global Technologies, Inc. Additionally, a Shear Modulus vs
12、. Temperature curve shall be plotted for - 50 to + 220 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 6. 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)
13、 3.5.6.1 At 23 +/- 2 C, min 11.0 kJ/m23.5.6.2 At - 40 +/- 1 C, min 11.0 kJ/m2The 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, b
14、ut within 5 s. 3.5.7 Heat Deflection Temperature, min 195 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/-0.2 mm specimen, at 1.82 MPa) 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 1000 h at 160 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8.
15、1 Tensile Strength Change +/- 20 % (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 25 % (Test Method per para 3.5.6.1, specimens to be notched before heat ageing) 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x
16、100 x 1.0 +/- 0.1 mm with a smooth surface. 3.7 ADDITIONAL REQUIREMENTS Additional requirements for material and/or manufactured parts may be specified on the Engineering drawing, Engineering parts specification, performance specification, System Design Specification (SDS) and/or Component Design Sp
17、ecification (CDS). ENGINEERING MATERIAL SPECIFICATION WSK-M4D622-A Page 4 of 6 Copyright 2010, Ford Global Technologies, Inc. 3.8 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval was originally granted
18、. Prior to making any changes to the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall notify the affected Purchasing, and Materials Engineering activities (with reasons) of the p
19、roposed changes. Upon notification of the Company, further instructions will be provided. Note: Suppliers should be prepared to provide test data and samples demonstrating compliance to this specification, if requested. Substance restrictions imposed by regulations or Company direction applies to th
20、e materials addressed by this document. The restrictions are identified in Restricted Substance Management Standard WSS-M99P9999-A1. 4. APPROVAL OF MATERIALS Materials defined by this specification for direct supply to the Company must have prior approval. Certain materials subcontracted by part sup
21、pliers may also require prior approval. These include materials critical to the Companys business for regulatory, safety, environmental or compatibility requirements or contractual agreements. Suppliers desiring approval of their materials shall first obtain an expression of interest from Purchasing
22、, Design or Materials Engineering activity. Upon request, the Supplier shall submit a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of this specification. 5. GENERAL I
23、NFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 1.8E-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) ENGINE
24、ERING MATERIAL SPECIFICATION WSK-M4D622-A Page 5 of 6 Copyright 2010, Ford Global Technologies, Inc. 5.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C 0.20 - 0.35 % 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 0.05 % After 30 minutes at 120 C 0.10 % 5.3 MELT TEM
25、PERATURE 250 C (ISO 1218, Method B/ASTM D 789) 5.4 MELT VOLUME RATE 7 - 14 cm3/ (ISO 1133/ASTM D 1238, except 10 minutes 260 +/- 0.5 C, 2.16 kg load, extrudate volume in cm3/10 minutes) The material shall be dried for 4 h minimum at 130 - 135 C in a mechanical convection oven immediately preceding the test. ENGINEERING MATERIAL SPECIFICATION WSK-M4D622-A Page 6 of 6 Copyright 2010, Ford Global Technologies, Inc.
