1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2009 11 19 A N-STATUS No replacement named J. Crist, NA 1978 06 07 Metricated and Revised CAH1-RD572066-52 1973 11 14 Released AD1-314 Page 1 of 4 ACETAL COPOLYMER, GLASS FILLED - GLASS TO COPOLYMER ESB-M4D3
2、57-A NOT TO BE USED FOR NEW DESIGN CHEMICALLY COUPLED ESB-M4D357-B INACTIVE 1. SCOPE: The material defined by this specification is an acetal copolymer resin reinforced with glass fibers. The glass fiber sizing is chemically coupled to the copolymer, thereby effecting superior thermal and mechanical
3、 properties. 2. APPLICATION: This specification was released originally for material used for the seat belt buckle switch and wiring assembly and can be used in similar applications where high heat resistance and high strength are required. 3. REQUIREMENTS: 3.1 RESIN 3.1.1 Glass Fiber Content, by we
4、ight 23 - 27% (1 h at 593 C) 3.1.2 Specific Gravity, max 1.63 (ASTM D 792) 3.1.3 Melting Point, min 160 C (FLTM BO 21-2) 3.2 INJECTION MOLDED TEST SPECIMEN 3.2.1 Glass Fiber Content, by weight 23 - 27% (1 h at 593 C) 3.2.2 Specific Gravity, max 1.63 (ASTM D 792) 3.2.3 Tensile Strength, min 14 000 ps
5、i (97 MPa) (ASTM D 638) 3.2.4 Elongation, max 5.0% (ASTM D 638) 3.2.5 Flexural Strength, min 22 000 psi (152 MPa) (ASTM D 790) 3.2.6 Flexural Modulus, min 900 000 psi (6.2 GPa) (ASTM D 790) ENGINEERING MATERIAL SPECIFICATION ESB-M4D357-A ESB-M4D357-B Page 2 of 4 3.2.7 Impact Strength, Izod, min (AST
6、M D 256) Notched 1.0 ft lb/in (54 J/m) Unnotched 7.5 ft lb/in (401 J/m) 3.2.8 Deflection Temperature, min (ASTM D 648) At 66 psi (455 kPa) 157 C At 264 psi (1820 kPa) 152 C 3.2.9 Melting Point, min 160 C (FLTM BO 21-2) 3.2.10 Water Absorption, by weight, max 0.3% (24 h immersion) 3.3 MOLDED PART 3.3
7、.1 Color Natural, or as specified on the engineering drawing 3.3.2 Infrared Spectrophotometry Ford Motor Company, at its option, may conduct infrared analysis of material/parts supplied to this specification. The curves established for initial approval shall constitute the reference standard and sha
8、ll be kept on file at Central Laboratory. All samples shall produce curves that correspond to the reference standard when tested under the same conditions as those specified on the master curve. 3.3.3 Physical Properties Specific requirements for physical properties of molded parts, when required, s
9、hall be specified on the engineering drawing. All critical areas with respect to these properties shall be clearly designated on the engineering drawing. 3.4 ESB-M4D357-A FLAMMABILITY, max 4 in (101 mm)/min (FLTM BN 24-2, without the lot sampling plan) In addition, the test specimen shall not exhibi
10、t any flashing or sudden flaming on either surface in excess of the above maximum value. 3.5 ESB-M4D357-B FLAMMABILITY 3.5.1 In order to comply with Federal Motor Vehicle Safety Standard No. 302, the material, portions of components, and composites shall not burn, or transmit a flame across its surf
11、ace, at a rate of more than 4 in (101 mm) per minute. To demonstrate compliance, the sample size and method of testing shall be in accordance with FLTM BN 24-2. ENGINEERING MATERIAL SPECIFICATION ESB-M4D357-A ESB-M4D357-B Page 3 of 4 3.5.2 Performance - Environmental Aging All materials, portions of
12、 components, and composites defined by this specification that have not been treated, modified or reformulated and exceed a maximum burn rate of 3.0 in (76 mm) per minute as specified by the Flammability Lot Sampling Plan of FLTM BN 24-2, must be evaluated for permanency of the materials flame retar
13、dant properties per ESB-M25P3-A according to the accelerated environmental aging requirements applicable to the basic material category of this particular specification. Any material, portions of components, and composites defined by this specification that have been treated, modified or reformulate
14、d to conform to Flammability Lot Sampling Plan of FLTM BN 24-2, regardless of maximum burn rate, must be evaluated for both permanency of materials flame retardant properties and changes in mechanical, chemical and physical properties per ESB-M25P3-A applicable to the basic material category of this
15、 particular specification. 3.5.3 Flammability Test Program Materials, portions of components, and composites governed by this specification must also comply with the requirements of ES-D3AB-11014-AA. 3.6 SUPPLIERS RESPONSIBILITY Material supplied to this specification must be equivalent to that orig
16、inally approved. Changes in formulation or processing shall not be made without prior approval as described in Supplier Procedure I-A. 4. APPROVAL OF SUPPLIERS: Suppliers to this specification must be approved by the affected product engineering office. Procedure for gaining approval of a specific m
17、aterial to a new/existing ES-M specification is contained in Supplier Procedure I-A. Approved new suppliers will be added to the Engineering Materials Approved Source List. 5. GENERAL INFORMATION: This data is for information only and is not a requirement. 5.1 HARDNESS - ROCKWELL “M“ 90 (ASTM D 785)
18、 5.2 TENSILE MODULUS 1.2 x 106psi (8.3 GPa) (ASTM D 638) 5.3 MOLD SHRINKAGE (ASTM D 955) In Direction of Flow 0.004 in/in (mm/mm) Transverse to Flow 0.018 in/in (mm/mm) ENGINEERING MATERIAL SPECIFICATION ESB-M4D357-A ESB-M4D357-B Page 4 of 4 5.4 COEFFICIENT OF LINEAR THERMAL EXPANSION (ASTM D 696) In Direction of Flow 3.9 x 10-5/ C Transverse to Flow 8.4 x 10-5/ C
