1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 12 21 Revised Inserted 3.0; Deleted 31, 3.2, 3.3, 3.7, 3.8 & 4 1994 11 07 Released NB00I10043054383 M. TrappPrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 5 UNSATURATED POLYESTER (UP), 40% GLASS FI
2、BER REINFORCED WSB-M3D173-A2 SHEET MOLDING COMPOUND 1. SCOPE The material defined by this specification is a 25 mm minimum long glass fiber reinforced unsaturated polyester (UP) sheet molding compound. 2. APPLICATION This specification was released originally for material used for cross-car truck be
3、ams. 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). 3.1.1 All requirements of this specification, identified by symbol (s), shall be met with data r
4、epresenting 3 sigma values. 3.4 MOLDED TEST SPECIMEN 3.4.1 Preparation of Test Specimens All test specimens shall be prepared from cross-ply molded plaques or equivalent. The plaques are to be manufactured from the same material and under equivalent conditions as production parts. The plaques shall
5、have the following dimensions. 300 x 300 mm, minimum x 2.5 +/- 0.2 mm Prepared specimens must show no evidence of fiber tear or loose fiber strands protruding from the specimens. No additional annealing of specimens is allowed. 3.4.2 Density 1.75 - 2.05 g/cm3(ISO 1183, Method A) (s) 3.4.3 Filler Con
6、tent 3.4.3.1 Ash Content 52 - 72% (ISO 3451/1, Method A, 1 h at 650 +/- 25 C) 3.4.3.2 Glass Fiber Content, by Weight 30 - 47% Test Method: ISO 3451/1, Method B, 1 h at 650 +/- 25 C, except use 5% by volume hydrochloric acid solution for 15 minutes. Rinse the glass fibers several times with distilled
7、 water before drying in an oven for 2 h at 120 +/- 2 C. After cooling, weigh the crucibles and calculate the percent glass fibers. ENGINEERING MATERIAL SPECIFICATIONWSB-M3D173-A2Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 5 3.4.3.3 Glass Fiber Length, min
8、25 mm (Optical evaluation method) (s) 3.4.4 Tensile Strength at Break, min 68 MPa (ISO R 527, 150 minimum x 25 x 2.5 +/- 0.2 mm specimen, 5 mm/min test speed) (s) 3.4.5 Flexural Modulus, min 8.5 GPa (ISO 178, 60 x 25 x 2.5 +/- 0.2 mm specimen, 40 mm support span, 2 mm/minute test speed) (s) 3.4.6 Fl
9、exural Strength, min 179 MPa (ISO 178, 60 x 10 x 2.5 +/- 0.2 mm specimen, 40 mm support span 2 mm/minute test speed) 3.4.7 Shear Modulus At 23 C 3.9 - 6.5 GPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 1%. Specimen approx. 60 x 10 x 4.0 +/- 0.2 mm cu
10、t 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 +290 C temperature range, at 5 C minimum intervals. The plotted curve must be within t
11、olerance range shown on page 6. (s) 3.4.8 Impact Strength, Izod, min (ISO 180/Method A, 63.5 x 12.7 x 2.5 +/- 0.2 mm specimen, 10 specimens minimum) 3.4.8.1 At 23 +/- 2 C 72 kJ/m23.4.8.2 At -40 +/- 2 C 87 kJ/m2The test specimens must be conditioned for minimum of 6 h at the above specified temperatu
12、re prior to impact test. Low temperature testing shall be done within the cold box. (s) 3.4.9 Heat Deflection Temperature, min 250 C (ISO 75, 120 x 10 x 2.5 +/- 0.2 mm specimen, 0.32 +/- 0.01 mm deflection. At 1.80 MPa) (s) 3.4.10 Water Absorption, max 0.7% (ISO 62, 24 h, 50 x 50 x 2.5 +/- 0.2 mm sp
13、ecimen ENGINEERING MATERIAL SPECIFICATIONWSB-M3D173-A2Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 5 3.4.11 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 150 +/- 2 C. Unaged property values shall be determined at the time of th
14、e aged properties determination) 3.4.11.1 Tensile Strength at Max Load Change +/- 36% (Test Method per para 3.4.4) 3.4.11.2 Flexural Strength Change +/- 39% (Test Method per para 3.4.6) 3.4.11.3 Impact Strength, Izod Change +/ 41% (Test Method per para 3.4.8.1, specimens to be notched before heat ag
15、ing) 3.5 FOGGING (FLTM BO 116-03, 3 h at 100 C heating, 21 C cooling plate) Fog Number, min 80 Formation of clear film, droplets or crystals is cause for rejection. Interpretation of results: The acceptability of any material must be based on evaluation of all three glass plates. Questions on interp
16、retation of results should be directed to the responsible Materials Engineering Activity. 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute Self-Extinguishing (SE) The specimen size required for material approval is 355 x 100 x 2.5 +/- 0.1 mm with a smooth surface. 5. GENERAL INFORMATION The
17、information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 2.33-5/ C (ASTM E 228 or TMA, temperature range -30 to +30 C) ENGINEERING MATERIAL SPECIFICATIONWSB-M3D173-A2Printed copies are uncontro
18、lled Copyright 2004, Ford Global Technologies, LLC Page 4 of 5 5.2 MOLD SHRINKAGE (ISO 2577, approx. 300 x 300 x 2.5 +/- 0.2 mm compression molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.06% 5.2.2 Post Shrinkage . After 48 h at 120 C 0.00% 5.3 RECYCLING CODE UP- (GF+M) 70 ENGINEERING MATERIAL SPECIFICATIONWSB-M3D173-A2Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 5 of 5
