1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 12 15 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.6, 3.7 & 4 1991 04 17 Released NC00E10117270000 G.P. Evanoff Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 4 UNSATURATED POLYESTER (UP), MODIFI
2、ED, 50% WSA-M3D164-A GLASS FIBER REINFORCED SHEET MOLDING COMPOUND (SMC) 1. SCOPE The material defined by this specification is 25 mm, minimum long glass fiber reinforced modified polyester sheet molding compound. 2. APPLICATION This specification was released originally for material used for a fuel
3、 tank protective heat shield. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIAL Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDED TEST SPECIMEN 3.4.1 Preparation of Test Specimens All test sp
4、ecimens 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. Prepared specimens must show no evidence of fiber tear or loose fiber strands protruding from the specimens. No additi
5、onal annealing of specimens is allowed. 3.4.2 Density 1.78 - 1.86 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) 3.4.3 Filler Content 3.4.3.1 Ash Content, max 63% (ISO 3451/1, Method A, 1 h at 650 +/- 25 C) 3.4.3.2 Glass Fiber Content, By Weight, min 50% Test Method: ISO 3451/1, Method B, 1 h at 65
6、0 +/- 25 C, except use 5% by volume hydrochloric acid solution for 15 minutes. Rinse the glass fibers several times with distilled water before drying in an oven for 2 h at 120 +/- 2 C. After cooling, weigh the crucibles and calculate the percent glass fibers. 3.4.3.3 Glass Fiber Length, min 25 mm (
7、Optical evaluation method) ENGINEERING MATERIAL SPECIFICATIONWSA-M3D164-A Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 4 3.4.4 Tensile Strength at Break, min 190 MPa (ISO R 527/ASTM D 638, 150, min x 25 x 2.5 +/- 0.2 mm specimen, 5 mm/minute test speed) 3.4
8、.5 Flexural Modulus, min 14.5 GPa (ISO 178/ASTM D 790, Method I, Procedure A, 60 x 10 x 2.5 +/- 0.2 mm specimen, 40 mm support span, 2 mm/minute test speed) 3.4.6 Flexural Strength, min 345 MPa (ISO 178/ASTM D 790, Method I, Procedure A, 60 x 10 x 2.5 +/- 0.2 mm specimen, 40 mm support span, 2 mm/mi
9、nute test speed) 3.4.7 Shear Modulus at 23 C 3.92 - 3.98 GPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 1%. Specimen approx. 60 x 10 x 2.5 +/- 0.2 mm cut from the center of specimen A. Specimen length between clamps 35 - 40 mm. Soak time at each temp
10、erature interval - 3 minutes minimum) Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +260 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 4. 3.4.8 Impact Strength, Izod, min (ISO 180, Method A/ASTM D 256,
11、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 1.3 kJ/m23.4.8.2 At -40 +/- 2 C 1.0 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 co
12、ld box, if not possible, test can be conducted outside, but within 5 s. 3.4.9 Heat Deflection Temperature, min 250 C (ISO 75, Method A/ASTM D 648, 120 x 10 x 2.5 +/- 0.2 mm specimen. At 1.82 MPa) 3.4.10 Water Absorption, max 0.35% (ISO 62, 24 h/ASTM D 570, 24 h, 50 x 50 x 2.5 +/- 0.2 mm specimen) 3.
13、4.11 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 180 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.4.11.1 Tensile Strength at Max Load Change, max -25% (Test Method per para 3.4.4) ENGINEERING MATERIAL SPEC
14、IFICATIONWSA-M3D164-A Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 4 3.4.11.2 Flexural Strength Change, max -25% (Test Method per para 3.4.6) 3.4.11.3 Impact Strength, Izod Change, max -25% (Test Method per para 3.4.8.1, specimens to be notched before heat
15、aging) 3.5 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 +/- 0.2 mm with a smooth surface. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the
16、 requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 1.8-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE 0.1% (ISO 2577, 300 x 300 x 2.5 +/- 0.2 mm compression molded specimen, after 48 h at room temperature) 5.3 HARDNESS, BARCOL 60 (ASTM D 2583) 5.4 COMPRESSIVE STRENGTH 172 MPa (ASTM D 695) 5.5 COLOR Off white or as specified on Engineering Drawing ENGINEERING MATERIAL SPECIFICATIONWSA-M3D164-A Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 4 of 4
