1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 06 24 N-STATUS No replacement named C. Mracna, NA 2006 08 25 Revised Format Change Only 2002 06 13 Activated B. Hennessey Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of 4 HOSE, AIR CONDITIONING REF
2、RIGERANT (VENEER) WSS-M96D25-A4 RESISTANT, LOW-MEDIUM-HIGH PRESSURE NOT TO BE USED FOR NEW DESIGN 1. SCOPE The materials defined by this specification is a polyamide/elastomeric layer (IIR)/high tensile polyester reinforcement/elastomer (EPDM) covered refrigerant hose. 2. APPLICATION This specificat
3、ion was released originally for hose designed for use with Refrigerant R-134a and refrigerant oils that must be serviceable over an ambient temperature range of -40 C to +135 C, an operating temperature of -40 C to +125 C and a maximum operating pressure of 3.4 Mpa. 3. REQUIREMENTS 3.1 STANDARD REQU
4、IREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 CONSTRUCTION The hose shall consist of a seamless smooth bore inner tube of nylon/elastomeric layer (butyl, neoprene), reinforced
5、with a high tensile ply or plies of polyester fabric bonded to the inner tube, and a butyl or EPDM rubber weather resistant outer cover. The outer cover shall be perforated (pin pricked). 3.3 MOLDED TEST SPECIMEN/TEST SLABS 3.3.1 Preparation of Test Specimens- Nylon Core Unless otherwise specified a
6、ll tests shall be carried out on extrusion molded specimens. The specimens shall be prepared according to ASTM D 1879. The test specimens have the following dimensions: 150 x 12.7 mm x 3.2 +/- 0.2 mm (tensile bar) and 120 x 12.7 x 3.2 +/- 0.2 mm (flex bar). No annealing allowed. 3.3.2 Preparation of
7、 Test Specimens- Butyl and EPDM Rubber Whenever possible, all test specimens shall be die-cut from the finished parts. When not feasible, specimens cut from molded test slabs manufactured from the same material and with equivalent cure to molded parts are recommended. The test slabs shall have the f
8、ollowing dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm. ENGINEERING MATERIAL SPECIFICATIONWSS-M96D25-A4 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 4 Polyamide Elastomer Elastomer Barrier (IIR) layer (EPDM) Cover 3.3.3 Density, g/cm31.02 - 1.20 1.18 - 1.2
9、4 1.11 - 1.17 (ISO 1183, Method A/ ASM D 297) 3.3.4 Hardness, Durometer A 60 - 80 65 - 75 68 - 78 (ISO 868/ASTM D 2240, Instantaneous plied-up specimen. Hand held durometers shall not be used.) 3.3.5 Tensile Strength, MPa, min 17.2 8.2 10.3 (ISO 37/ASTM D 412, Die C) 3.3.6 Elongation, % 200 225 200
10、ISO 37/ASTM D 412 Die C) 3.3.7 Melt Temperature, C, min 200 N/A N/A (ASTM D 789) 3.3.8 Flexural Modulus, MPa, max 3000 N/A N/A (ASTM D 790, Method I, Procedure A) 3.3.9 Moisture Content, %, max 0.3 N/A N/A 3.3.10 Ozone Resistance, max - - Rating 0 (ASTM D 1171, Method A, 70 h at 50 pphm) Polyamide
11、Elastomer Elastomer Barrier (IIR) layer (EPDM) Cover 3.4 HEAT AGED PROPERTIES - - 125 oC (ISO 188/ASTM D 573, 1000h) Hardness Change, max. - - +10 Tensile Strength Change, % max. - - -20 Elongation Change, % max. - - -45 ENGINEERING MATERIAL SPECIFICATIONWSS-M96D25-A4 Printed copies are uncontrolled
12、 Copyright 2010, Ford Global Technologies, LLC Page 3 of 4 3.5 DIMENSIONS The hose shall conform to the dimensions and tolerances specified in Table 1. Measurement shall be made in accordance with ASTM D 380. Table 1 Veneer Hose Material Hose Size (mm) Min Inside Diameter mm Max Inside Diameter mm M
13、in Outside Diameter mm Max Outside Diameter mm Concentricity TIR mm 8 mm 8.00 8.76 15.5 16.25 0.76 10 mm 10.16 10.92 17.78 18.80 0.76 16 mm 16.00 16.90 24.25 25.27 0.76 3.6 WEIGHT LOSS, max 0.5% (After 8 h at 70 +/- 2 C) 3.7 ADHESION, min (ASTM D 413, ring specimen, Type A) 3.7.1 Nylon to Rubber Lay
14、er Stock Tear. 3.7.2 Second Rubber layer to Reinforcement 31N 3.7.3 Reinforcement to Cover 22N 3.8 IDENTIFICATION The hose shall be identified as follows: a) Hose supplier identification code. b) Hose I.D. in millimeters c) Four digit date code d) Color of letter Yellow or White. The following code
15、format is recommended, but not mandatory: G 2 01 Where: G =Plant Designation 2 =Year (single digit) 01 =Week (two digit number) These markings shall appear at intervals not greater than 305 mm. The markings shall not be soluble in water, automatic transmission fluid or fluids used in the engine comp
16、artment and shall withstand normal handling without smearing ENGINEERING MATERIAL SPECIFICATIONWSS-M96D25-A4 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 4 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in me
17、eting the requirements of this specification. 4.1 For information on currently approved refrigerants for use in this specification contact: Materials Technology Center 15/GM POEE Research & Engineering Center 21500 Oakwood Blvd Ford Motor Company Dearborn Laindon, Basildon MI 48124-4091 Essex SS15 6EE, England U.S.A. Materials Engineering Product Engineering Office Ford Motor Co. of Australia, Ltd. Princes Highway, Norlane Victoria 3214, Australi 4.2 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES PA6, IIR,PET,EPDM
