1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 7 2017 03 13 Revised See Summary of revisions C.Obermaier, NA 2016 05 10 Revised Editorial correction to 2.0 A. Reaume, NA 2016 02 09 Revised Editorial correction to 3.14 A. Reaume, NA Controlled document at www.MATS Copyright 2017, Ford
2、 Global Technologies, LLC Page 1 of 8 HOSE, EPDM RUBBER, PARA-ARAMID FIBERS WSE-M96D34-A1 REINFORCED, ENGINE COOLANT AND ELECTRO- NOT TO BE USED FOR NEW DESIGN CHEMICAL DEGRADATION RESISTANT, HIGH ELONGATION, LOW MODULUS HOSE, EPDM RUBBER, META-ARAMID FIBERS WSE-M96D34-A2 REINFORCED, ENGINE COOLANT
3、AND ELECTRO- CHEMICAL DEGRADATION RESISTANT, HIGH ELONGATION, LOW MODULUS HOSE, EPDM RUBBER, RAYON OR PET FIBER REINFORCED, WSE-M96D34-A3 ENGINE COOLANT AND ELECTROCHEMICAL DEGRADATION RESISTANT, HIGH ELONGATION, LOW MODULUS, OR A COPOLYMER PARA-ARAMID HOSE, EPDM RUBBER, MODIFIED PARA-ARAMID FIBERS
4、WSE-M96D34-A4 REINFORCED, ENGINE COOLANT AND ELECTRO- CHEMICAL DEGRADATION RESISTANT, HIGH ELONGATION, LOW MODULUS HOSE, EPDM RUBBER, META-ARAMID OR MODIFIED WSS-M96D34-A5 PARA-ARAMID FIBERS REINFORCED, ENGINE COOLANT AND ELECTRO-CHEMICAL DEGRADATION RESISTANT, HIGH ELONGATION, LOW MODULUS, HIGH PRE
5、SSURE RESISTANCE 1. SCOPE These specifications define long life, high pressure EPDM rubber coolant hoses internally reinforced with a variety of synthetic fibers. All these hoses are resistant to electrochemical (striations) degradation. 2. APPLICATION These specifications address electrochemical de
6、gradation which is the root cause of coolant hose cracks and striations and the sealing requirements of the hoses at high and low temperatures. They characterize hoses which are resistant to electrochemical damage, air, coolant, and ozone up to 120 C continuous with short term exposures up to 140 C.
7、 When used with the proper fittings and constant tension clamps, they also have excellent sealability down to -40 C. These materials may be used in branched hose applications. This document does not address special design considerations such as excessive pressures, impulse cycles, or bend radii, See
8、 coolant hose design guide for design considerations. “A1“ hoses have para-aramid (Kevlar) fiber reinforcement which is sufficient for all applications that do not have excessive impulse and/or flex conditions. This specification is used mostly for upper and lower radiator hoses. This specification
9、is not recommended for new applications. ENGINEERING MATERIAL SPECIFICATION WSE-M96D34-A1/A4, WSS-M96D34-A5 Copyright 2017, Ford Global Technologies, LLC Page 2 of 8 “A2“ hoses have meta-aramid (Nomex) fiber reinforcement which should be specified only where excessive impulse and/or flex resistance
10、are required. This specification is used for heater and bypass hoses. “A3“ hoses have rayon or polyethylene terephthalate fiber reinforcement and should be used only in applications where the temperature does not exceed 120 C. This hose is made primarily for lower radiator hose applications. The com
11、pound properties of “A3“ hoses are equivalent to “A1“ and “A2“ hoses. This specification is not recommended for new applications in North America. “A4“ hoses have a modified para-aramid (K 119), Twaron T2100 (or a copolymer para-aramid (Technora) fiber reinforcement which should be specified where e
12、xcessive impulse and/or flex resistance are required such as heater and bypass hoses. “A5“ hoses have either a meta-aramid (see A2) or a modified para-aramid (see A4) fiber reinforcement with a construction that will withstand higher system pressures. This specification should be used on application
13、s where an even greater resistance to pressure is required. 3. REQUIREMENTS 3.1 APPROVED SOURCES This specification requires the use of approved sources. Only the sources identified on the Ford Approved Source List (ASL) can be used when this specification is listed on the drawing, CAD file, or othe
14、r documents. The list of approved sources is located within Ford at or available externally through a Ford Materials Engineer. 3.2 CONDITIONING AND TEST CONDITIONS All test values are based on material conditioned for not less than 24 h prior to testing in a controlled environment of 23 +/- 2 C and
15、 50 +/- 5% relative humidity. Testing of the material should occur in the conditioning environment or soon after removal. 3.3 COMPOSITION Compounds formulated to these specifications shall not contain thiuram and no more than 0.04 wt % thiocarbamates in the inner layer (tube) of the construction. 3.
16、4 DYNAMIC MECHANICAL ANALYSIS (ASTM D 4065) Ford Motor Company, at its option, may establish a shear modulus/damping vs. temperature curves plotted for -40 to +135 C temperature range for material/parts supplied to this specification. The shear modulus and damping curves established for initial appr
17、oval shall constitute the reference standard and shall be kept on file at the designated material laboratory. All samples shall produce shear modulus and damping curves that correspond to the reference standard when tested under the same conditions. 3.5 HOSE CONSTRUCTION The hose shall consist of an
18、 EPDM rubber tube and cover internally reinforced with para-aramid (Kelvar) fibers (WSE-M96D34-A1) or meta-aramid (Nomex) fibers (WSE-M96D34-A2), rayon or polyethylene terephthalate fibers (WSE-M96D34-A3) or modified para-aramid (K-119) or copolymer para-aramid (Technora) fibers (WSE-M96D34-A4). The
19、 following tests where possible, shall be performed on finished hoses and/or test specimens cut from them in accordance with ASTM D 3183 (cutting knife procedure preferred). Greater ENGINEERING MATERIAL SPECIFICATION WSE-M96D34-A1/A4, WSS-M96D34-A5 Copyright 2017, Ford Global Technologies, LLC Page
20、3 of 8 variation in test values can be anticipated when evaluating materials that are thinner then recommended by an applicable Industry Standard/Test Method. 3.6 ORIGINAL PROPERTIES Tube Cover 3.6.1 Hardness, Durometer A 58 - 70 60 - 72 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen) 3.6.2
21、Tensile Strength 10.0 MPa min 9.0 MPa min (ISO 37/ASTM D 412, Die C) 3.6.3 Elongation (ISO 37/ASTM D 412, Die C) . Sulfur Cured 420 % min 350 % min . Peroxide Cured 250 % min 250 % min 3.6.4 Modulus at 100% Elongation, 2.0 - 4.0 % 2.0 - 4.0 % MPa, min (ISO 37/ASTM D 412, Die C) 3.6.5 Ozone Resistanc
22、e, Cover - Rating 0 max (FLTM BP 101-01, Procedure A or B) 3.7 HEAT AGED (ISO 188/ASTM D 573, 168 h) 135 C 150 C Hardness Change +14 max +17 max Tensile Strength Change -18 % max -32 % max Elongation Change . Sulfur Cured -65 % max -75 % max . Peroxide Cured -20 % max -25 % max Visual Evaluation No
23、surface tackiness or cracks when folded flat against itself. 3.8 HEAT AGED (ISO 188/ASTM D 573, 1000 h) 120 C 135 C Hardness Change +18 max +22 max (Actual Hardness not to exceed 90) Tensile Strength Change -25 % max -38 % max ENGINEERING MATERIAL SPECIFICATION WSE-M96D34-A1/A4, WSS-M96D34-A5 Copyri
24、ght 2017, Ford Global Technologies, LLC Page 4 of 8 120 C 135 C Elongation Change -75 % max -88 % max . Sulfur Cured -75 % max -88 % max . Peroxide Cured -30 % max -42 % max Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.9 IMMERSION IN CURRENTLY RELEASED ENGINE C
25、OOLANT, 50/50% v/v MIXTURE WITH WATER, TUBE ONLY (FLTM BO 130-01, Method B, 168 h at 125 +/- 2 C) Hardness Change +/- 6 max Tensile Strength Change -18 % max Elongation Change -40 % max Volume Change +4.4 % max 3.10 IMMERSION IN CURRENTLY RELEASED ENGINE COOLANT, 50/50% v/v MIXTURE WITH WATER, TUBE
26、ONLY (FLTM BO 130-01, Method B, 1000 h at 125 +/- 2 C) Hardness Change +/- 6 max Tensile Strength Change -18 % max Elongation Change -45 % max Volume Change +6 % max 3.11 BURST PRESSURE, MPa, min (ASTM D 380, except for molded hose test on full hose, for straight hose use 250 mm length) Hose I.D. A1
27、 A2 A3 A4 A5 19mm and smaller 1.9 1.7 1.2 2.1 3.4 20 25 1.4 1.5 1.1 2.0 10 times max peak operating pressures 26 32 1.3 1.4 1.1 1.8 33 38 1.3 1.3 0.9 1.6 39 45 1.1 1.1 0.9 1.4 45 and larger As shown on Engineering drawing ENGINEERING MATERIAL SPECIFICATION WSE-M96D34-A1/A4, WSS-M96D34-A5 Copyright 2
28、017, Ford Global Technologies, LLC Page 5 of 8 3.12 BURST PRESSURE AFTER WET HEAT AGING (ASTM D 380, fill hose with 50/50% coolant and water. Heat to 104 +/- 2 C for 2000 h) A1 A2 A3 A4/A5 % Change, max -28 -10 -45 -28 (All hose diameters) 3.13 CIRCUMFERENTIAL SWELL 12% max (For 25 mm I.D. and large
29、r) Test Method: Assemble a straight 250 mm length of hose in a test fixture and pressurize with a mixture consisting of 50% by volume coolant concentrate (see para 4) and 50% water at 23 +/- 2 C and 0 kPa pressure and measure the circumference of the hose. Increase the coolant temperature to 140 +/-
30、 2 C and pressurize to 240 kPa. After 8 +/- 0.25 h re-measure the circumference. Calculate the percentage increase in diameter. 3.14 RESISTANCE TO KINKING (For 25 mm I.D. and smaller) Applies to straight hoses containing straight lengths equal to or greater than the test length shown below. Test Met
31、hod: The hose sample shall be stabilized at 23 +/- 2 C before start of test. The test fixture shall consist of 25 mm flat plate with 2 holes for each size hose. Diameters and center distances between holes are tabulated below. Bend hose through 180 and insert in the fixture, with each end of the tes
32、t length flush with the opposite side. Requirement: The sample shall show no visible evidence of buckling and shall pass a steel ball freely through the sample hose. Hose I.D., mm Test Length, mm Center Distance, mm Hole Diameter, mm Ball Diameter, mm 25 450 8 x I.D. O.D. + 1.5 mm 0.5 x I.D. nominal
33、 25 mm. 2015 08 14 Revised 3.1 to only restrict thiuram and thiocarbamates in the tube layer. Removed WSS-M99P1111-A and added in relevant paragraphs Moved A1 to N Status. No longer in strategy 2014 05 29 Modified para. 3.1 to clarify no thiuram allowed. 2012 08 28 Amended para 3.8 volume change from 4.9% max to 6% max Amended para 3.9 A3 burst pressure 2011 11 02 Added 3.18 Staining potential. 2011 06 13 Added Requirements in 3.1 and Renumber. Removed mailing addresses. Revised Tube requirements in 3.5 and 3.6. Revised burst requirement for A5 in 3.9. Added 3.18 Coolant Staining Test
