1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2000 09 25 Revised Updated and Renumbered A. Cockman 1979 04 04 3.7 Added Mesh Opening R# 1 - 9/CH8H - RD - 834180 R. H. Hannum 1978 12 11 Released R# 12 - 6/CH8H - RD - 834180 Printed copies are uncontrolle
2、d Page 1 of 2 Copyright 2000, Ford Global Technologies, Inc. SCREEN, POLYESTER MONOFILAMENT ESH-M9H98-A 1. SCOPE The material defined by this specification is a woven screen constructed in a plain square weave using polyester monofilament thread with a nominal 130 micron mesh opening. 2. APPLICATION
3、 This speci fication was released originally for material used in orifice assemblies in A/C refrigerant lines. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.1 QUALITY SYSTEM REQUIREMENTS Material supp liers and part producers must confor
4、m to the Companys Quality System Requirements. 3.2 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/ - 2 C and 50 +/ - 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditi
5、ons unless otherwise specified. 3.3 SPECIFIC GRAVITY 1.36 - 1.40 (ASTM D 792) 3.4 MELTING POINT 250 260 C (FLTM BO 21 - 2) 3.5 THREAD DIAMETER 76 - 84 m 3.6 MESH COUNT 119 - 124/in (48 - 50/10 mm) 3.7 WEIGHT 1.9 - 2.0 oz/yd 2 (64 - 68 g/m 2 ) ENGINEERING MATERIAL SPECIFICATION ESH-M9H98-A Page 2 of
6、2 Copyright 2000, Ford Global Technologies, Inc. 3.8 MESH OPENING 130, +8, - 10 m 3.9 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS IR spectra and thermograms established for initial approva l shall constitute the reference standard and shall be kept on file at the designated material laborator
7、y. All samples shall produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. 3.10 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval was origin
8、ally granted. Prior to making any changes to the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall notify the affected Purchasing, and Materials Engineering activities (with reaso
9、ns) of the proposed changes. Upon notification of the Com pany, further instructions will be provided. Note: Suppliers should be prepared to provide test data and samples demonstrating compliance to this specification, if requested. Substance restrictions imposed by regulations or Company direction
10、applies to the materials addressed by this document. The restrictions are identified in Restricted Substance Management Standard WSS - M99P9999 - A1. 4. APPROVAL OF MATERIALS Materials defined by this specification for direct supply to the Company must have prior app roval. Certain materials subcont
11、racted by part suppliers may also require prior approval. These include materials critical to the Companys business for regulatory, safety, environmental or compatibility requirements or contractual agreements. Suppliers desiring approval of their materials shall first obtain an expression of intere
12、st from Purchasing, Design or Materials Engineering activity. Upon request, the Supplier shall submit a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of this specification.
