1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 12 21 Revised Revised Format 2002 11 19 Activated M. Masserant Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 4 UNSATURATED POLYESTER (UP), MODIFIED, 40% GLASS WSS-M3D173-A4 FIBER REINFORCED SHEET
2、MOLDING COMPOUND 1. SCOPE The material defined by this specification is a 25 mm minimum long glass fiber reinforced unsaturated, modified polyester sheet molding compound (SMC). 2. APPLICATION This specification was released originally for materials used for a rear axle shield. 3. REQUIREMENTS 3.1 S
3、TANDARD 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 representing 3 sigma values
4、. 3.2 MOLDED TEST SPECIMEN 3.2.1 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 have the following dimensi
5、ons. 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. 3.2.2 Density 1.75 - 2.05 g/cm3(ISO 1183, Method A) (s) 3.2.3 Filler Content 3.2.3.1 Ash Content 7
6、9% (ISO 3451/1, Method A, 1 h at 650 +/- 25 C) ENGINEERING MATERIAL SPECIFICATIONWSS-M3D173-A4Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 4 3.2.3.2 Glass Fiber Content, 37 - 40% By Weight, min Test Method: ISO 3451/1, Method B, 1 h at 650 +/- 25 C, except
7、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. 3.2.3.3 Glass Fiber Length, min 25 mm (Optical evaluation
8、method) (s) 3.2.4 Tensile Strength at Break, min 94 MPa (ISO R 527, 150 minimum x 25 x 2.5 +/- 0.2 mm specimen, 5 mm/min test speed) (s) 3.2.5 Flexural Modulus, min 11.3 GPa (ISO 178, 60 x 10 x 2.5 +/- 0.2 mm specimen, 40 mm support span, 2 mm/minute test speed) (s) 3.2.6 Flexural Strength, min 207
9、MPa (ISO 178, 60 x 10 x 2.5 +/- 0.2 mm specimen, 40 mm support span 2 mm/minute test speed) (s) 3.2.7 Impact Strength, Izod, min (ISO 180/4A, 63.5 x 12.7 x 2.5 +/- 0.2 mm specimen, 10 specimens minimum) 3.2.7.1 At 23 +/- 2 C 64 kJ/m23.2.7.2 At -40 +/- 2 C 127 kJ/m2The test specimens must be conditio
10、ned 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, but within 5 s. (s) 3.2.8 Heat Deflection Temperature, min 250 C (ISO 75, 120 x 10 x 2.5 +/- 0.2 mm specimen, 0.3
11、2 +/- 0.01 mm deflection. At 1.80 MPa) (s) 3.2.9 Water Absorption, max 0.30% (ISO 62, 24 h, 50 x 50 x 2.5 +/- 0.2 mm specimen ENGINEERING MATERIAL SPECIFICATIONWSS-M3D173-A4Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 4 3.2.10 Heat Aging Performance (ISO 18
12、8, except 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) 3.2.10.1 Tensile Strength at Max Load Change, max -25% (Test Method per para 3.2.4) 3.2.10.2 Flexural Strength Change, max -25% (Test Method per par
13、a 3.2.6) 3.2.10.3 Impact Strength, Izod Change, max -37% (Test Method per para 3.2.7.1, specimens to be notched before heat aging) 3.3 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 sm
14、ooth surface. 3.4 IMPACT STRENGTH, MULTIAXIAL, J MIN Ductile at -30 C Test Method - ISO 6603/2, injection molded 3.2 +/- 0.2 mm thick specimen, 10 +/- 0.1 mm striker diameter, impact velocity 6.0 +/- 0.1 m/second. Test at the following low temperature that yields a ductile failure: -40 +/- 2 C, -30
15、+/- 2 C, -20 +/- 2 C, or 23 +/- 2 C, test minimum of 5 specimens. Test specimens must be conditioned for minimum of 6 h at the specified temperature prior to impact testing. Low temperature testing shall be done within the cold chamber. A ductile failure is defined as a crack that does not radiate m
16、ore than 15 mm from the point of impact. Report in Joules total energy and peak energy at all temperatures. Test results shall be submitted with an initial characterization of the material with curves and tested samples. ENGINEERING MATERIAL SPECIFICATIONWSS-M3D173-A4Printed copies are uncontrolled
17、Copyright 2004, Ford Global Technologies, LLC Page 4 of 4 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 1.20 - 1.70-5/ C (ASTM E 228 or TMA, temperature ra
18、nge -30 to +30 C) 4.2 MOLD SHRINKAGE 0.1% (ISO 2577, approx. 300 x 300 x 2.5 +/- 0.2 mm compression molded specimen, after 48 h at room temperature) 4.3 DYNATUP Data available after 6 production batches. 4.4 COMPRESSIVE STRENGTH 210 MPa (ASTM D 695) 4.5 COLOR Black or as specified on Engineering Drawing 4.6 RECYCLING CODE UP- (GF+M) 80
