1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2011 10 10 N Status Replaced by WSS-M4D731-B1 V. Cerato, Eu 2005 12 21 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1990 08 01 Released EP00E010315380000 L. Rodigas Controlled document at www.MATS Copyright 2011, Ford Glob
2、al Technologies, LLC Page 1 of 4 POLYPROPYLENE (PP) HOMOPOLYMER, 20% GLASS WSK-M4D731-A2 FIBER REINFORCED, MELT FLOW RATE 10 - 18 NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a 20% glass fiber reinforced injection molding compound based on polypropylene homopo
3、lymer with controlled rheologic properties and melt flow rate of 10 - 18 g/10 minutes. 2. APPLICATION This specification was released originally for material used for fuse junction panel box assembly. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of mat
4、erials. 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). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 10 - 18 g/10 minutes (ISO 1133/ASTM D 1238, 230 C, 2.16 kg) 3.4.2 G
5、lass Fiber Content 19 - 22% (ISO 3451/1, Method A, 3 h at 650 +/- 25 C, test portion 1 to 2 g) 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 require
6、d: A. 150 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167) B. 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 1.02 - 1.06 g/cm3
7、 (ISO 1183, Method A/ASTM D 792, Method A1) ENGINEERING MATERIAL SPECIFICATION WSK-M4D731-A2 Copyright 2011, Ford Global Technologies, LLC Page 2 of 4 3.5.3 Tensile Strength at Max Load, min 25 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) 3.5.4 Flexural Mo
8、dulus, min 2.5 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 690 - 1150 MPa (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
9、 cut 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 +140 C temperature range, at 5 C minimum intervals. The plotted curve must be withi
10、n tolerance range shown on page 4. 3.5.6 Impact Strength, Izod, min (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) 3.5.6.1 At 23 +/- 2 C 2.3 kJ/m2 3.5.6.2 At -40 +/- 2 C 1.5 kJ/m2 The test specimens must be conditioned for minimum of 6 h at t
11、he 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. 3.5.7 Heat Deflection Temperature, min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) 3.5.7.1 At 1.82 MPa 65 C 3.5.
12、7.2 At 0.45 MPa 105 C 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 140 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8.1 Tensile Strength at Max Load Change +/- 15% (Test Method per para 3.5.3) 3.5.8
13、2 Impact Strength, Izod Change, max -15% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATION WSK-M4D731-A2 Copyright 2011, Ford Global Technologies, LLC Page 3 of 4 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size re
14、quired for material approval is 355 x 100 x 1.0 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 80 Formation of clear film, droplets or crystals is cause for rejection. 5. GENERAL INFORMATION The
15、 information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 4 - 15-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shri
16、nkage After 48 h at 23 +/- 2 C 0.7 - 1.3% 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 0.2 - 0.3% After 30 min at 120 C 0.2 - 0.4% 5.3 ELONGATION AT BREAK, min 4% (Test Method according to para 3.5.3) 5.4 DETERMINATION OF CR-GRADE Melt Flow Rate-Ratio, max 4 Melt Flow Rate-Ratio = B/A x 100 Where: A - Melt Flow Rate at 190 C and 0.325 kg B - Melt Flow Rate at 190 C and 10 kg Test Method A and B according to ISO 1133 ENGINEERING MATERIAL SPECIFICATION WSK-M4D731-A2 Copyright 2011, Ford Global Technologies, LLC Page 4 of 4
