1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2011 03 01 No replacement named A. Pan, APA N Status 1985 10 14 CDP2-C3P2-CEP2-627170-C8Revised 1983 01 20 CEM2-CGM2-C3N2-896015-C Released WP 3948-a Page 1 of 3 THERMOPLASTIC POLYOLEFIN ELASTOMER, BLOW ESA-M4
2、D433-A2 MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic olefin blow molding elastomer consisting of fully cured rubber particles dispersed in a continuous thermoplastic matrix. 2. APPLICATION This specification was released origin
3、ally for material used as manual steering gear bellows where brake fluid resistance is a consideration. 3. REQUIREMENTS 3.1 RAW MATERIAL 3.1.1 Specific Gravity 0.96 0.02 (ASTM D 792) 3.1.2 Moisture Content, max 0.1% (ASTM D 789, 30 min at 125 C) 3.2 MOLDED TEST SPECIMEN 3.2.1 Hardness, Durometer D 4
4、0 5 (ASTM D 2240) 3.2.2 Tensile Strength, min 13.8 MPa (ASTM D 412, Die C, 500 mm/min, samples to be tested parallel to the grain flow) Elongation, min 400% 3.2.3 Compression Set, max 50% (ASTM D 395, Method B, 22 h at 70 C) 3.2.4 Tear Strength, min 51 kN/m (ASTM D 1004, samples to be tested paralle
5、l to the grain flow) ENGINEERING MATERIAL SPECIFICATION ESA-M4D433-A2 WP 3948-b Page 2 of 3 3.2.5 Immersion in ASTM Oil #1 (ASTM D 471, 70 h at 125 3 C) Hardness, Durometer D Change, max -20 Tensile Strength Change, max -25% Elongation Change, max -40% Volume Change, max +25% 180 degree Bend Test No
6、 cracks (Bend completely flat against itself) permitted 3.2.6 Immersion in ASTM Oil #3 (ASTM D 471, 70 h at 125 3 C) Hardness, Durometer D, Change, max -30 Tensile Strength Change, max -40% Elongation Change, max -75% Volume Change, max +70% 180 degree Bend Test No cracks (Bend completely flat again
7、st itself) permitted 3.2.7 Heat Aged (ASTM D 865, 70 h at 125 3 C) Hardness, Durometer D Change 5 Tensile Strength Change 15% Elongation Change 30% Tear Strength, min 46 kN/m 3.2.8 Temperature Brittleness, max -40 C (ASTM D 746, Method B, nonbrittle after 3 min at -40 C) 3.2.9 Immersion in ESA-M6C25
8、-A Brake Fluid (ASTM D 471, 70 h at 125 3 C) Hardness, Durometer D Change 10 Tensile Strength Change 20% Elongation Change, max -30% Volume Change, max -25% ENGINEERING MATERIAL SPECIFICATION ESA-M4D433-A2 WP 3948-b Page 3 of 3 3.3 MOLDED PART 3.3.1 Specific Gravity 0.96 0.02 (ASTM D 792) 3.4 INFRAR
9、ED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts supplied to this specification. The IR spectra and thermogram established for initial approval shall constitute the reference standard and shall be kept on f
10、ile at the designated material laboratory. All samples shall produce IR spectra and thermogram that correspond to the reference standard when tested under the same conditions. 3.5 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the m
11、aterial upon which approval was originally granted. Prior to making any change in the properties, composition, construction, color, processing or labelling of the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification
12、 requirements, the Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changes and obtain the written approval of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with the request. S
13、ubstance restrictions imposed by law, regulations or Ford, apply to the materials addressed by this document. The restrictions are defined in Engineering Material Specification WSS-M99P9999-A1, unless a different suffix (e.g., A2 or A3) is specified on the engineering document for the application. 4
14、. APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approval of their materials shall first obtain an expression of interest from the affected Purchasing, Design and Materials Engineering activ
15、ity. Upon request, the Supplier shall submit to the affected Materials Engineering activity its own laboratory report to the specification (test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Upon approval, the material will be added to the Engineering Material Approved Source List.
