1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 01 2016 06 27 Revised See Summary of Revisions A. Reaume, NA 2016 01 04 Released A. Reaume, NA Controlled document at www.MATS Copyright 2016, Ford Global Technologies, LLC Page 1 of 6 HYDROGENATED NITRILE (HNBR) RUBBER, WSS-M2D451-B3 HIG
2、H TEMPERATURE COOLANT SEAL 70 DUROMETER A HARDNESS 1. SCOPE The material defined by this specification is a hydrogenated acrylonitrile butadiene (HNBR) rubber for use where resistance to heat, coolant, water and low temperature flexibility are required. 2. APPLICATION This specification was released
3、 originally for material used for coolant cap seals where temperatures exceed 120C. For applications below 120C EPDM is an acceptable coolant seal material. The material may also be used as a secondary seal against exposure to engine oil or transmission fluid. 2.1 LIMITATIONS This material has infer
4、ior low temperature properties compared to EPDM and NBR, low temperature testing should be completed on components. EPDM should not be used as a secondary seal to hydrocarbon based fluids, like engine oil or transmission fluid. 3. REQUIREMENTS 3.1 APPROVED SOURCES This specification requires the use
5、 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 other documents. The list of approved sources is located within Ford at or available externally through a Ford Materials Engineer. 3.2
6、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 50 +/- 5% relative humidity. Testing of the material should occur in the conditioning environment or soon after removal. 3.3 INFRAR
7、ED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS IR spectra and thermograms from initial material approval shall constitute the reference standard and shall be kept on file at the designated material laboratory. The material supplier shall ensure that all future material supplied to the specification sh
8、all produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. 3.4 SAMPLE SIZE Refer to Table 1 for number of samples required for each test to establish conformance to specification limits ENGINEERING MATERIAL SPECIFICATION WSS-M2D451-B3 Copy
9、right 2016, Ford Global Technologies, LLC Page 2 of 6 3.5 MATERIAL TESTING 3.5.1 Preparation of Test Specimens Whenever possible, all test specimens shall be die-cut from the finished parts. When not feasible, specimens cut from molded test sheets manufactured from the same material and with equival
10、ent cure to molded parts are recommended. The test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.6 MATERIAL PROPERTIES 3.6.1 Density 1.0 - 1.4 g/cm3 (ISO 1183, Method A/ASTM D 297) 3.6.2 Hardness, International 65 - 75 (ISO 48/ASTM D 1415) 3.6.3 Hardness, Durometer
11、 A 67 - 77 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen. Hand held durometer shall not be used) 3.6.4 Tensile Strength 16 MPa min (ISO 37/ASTM D 412, Die C, 500 +/- 50 mm/min) 3.6.5 Elongation at Break 175% min (Test Method according to para 3.6.4) 3.6.6 Modulus at 100% Elongation 3.5 - 7.
12、6 MPa (Test Method according to para 3.6.4) 3.6.7 Tear Strength 17 kN/m min (ISO 34, Method B, procedure (a)/ ASTM D 624, Die C) 3.6.8 Ozone Resistance Rating 0 max (FLTM BP 101-01, Procedure A) 3.6.9 Compression Set 35% max (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up or button s
13、pecimens, 70 h at 150 +/- 2 C) 3.7 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 150 +/- 2 C) 3.7.1 Hardness Change +17 max 3.7.2 Tensile Strength Change -20% max 3.7.3 Elongation Change -50% max 3.7.4 Visual Evaluation No surface tackiness or cracks when folded flat against itse
14、lf. ENGINEERING MATERIAL SPECIFICATION WSS-M2D451-B3 Copyright 2016, Ford Global Technologies, LLC Page 3 of 6 3.8 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 135 +/- 2 C) 3.8.1 Hardness Change +12 max 3.8.2 Tensile Strength Change -10 to +10% 3.8.3 Elongation Change -35% max
15、3.8.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.9 IMMERSION IN ASTM SF 105 OIL (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) This testing shall be included when used as a secondary engine oil seal. 3.9.1 Hardness Change -10 max 3.9.2 Tensile Strength Change +2
16、0% max 3.9.3 Elongation Change -25% max 3.9.4 Volume Change +10% max 3.9.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10 IMMERSION IN CURRENTLY RELEASED AUTOMATIC TRANSMISSION FLUID (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) This testing shall be included wh
17、en used as a secondary transmission fluid seal. 3.10.1 Hardness Change -25 to 10 3.10.2 Tensile Strength Change -20 to +5% 3.10.3 Elongation Change -35 to +15% 3.10.4 Volume Change +25% max 3.10.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.11 COMPRESSION STRE
18、SS RELAXATION 10% RSF (SAE J2979, 3000 h at 125 C +/- 2 C (Residual Sealing Force) 25% compression, with the procedure as noted below). Residual sealing force readings: Per SAE J2979 take readings initially at 1 hour + 5 minutes, 24 hours, then at weeks 1, 3, 6, 9, 12 and 18. ENGINEERING MATERIAL SP
19、ECIFICATION WSS-M2D451-B3 Copyright 2016, Ford Global Technologies, LLC Page 4 of 6 Fluid Changes: Perform fluid changes at weeks 3, 6, 9, 12 and 15 (after sealing force readings) Use a ratio of 25% coolant to 75% air in the pressure vessel; completely immerse CSR fixtures in coolant. Test Fluids En
20、gine Coolant: Factory fill coolant, WSS-M97B44-D or current release 50:50 dilution Perform testing in a pressure vessel suitable for use with coolant. Note: Follow safety precautions when handling fuel, including but not limited to, proper venting, handling hot containers, allowing the pressure vess
21、el to cool before opening, use of a pressure relief valve, etc. 3.12 COLD TEST (FLTM BP 106-03) Condition for 5 h at -40 +/- 2 C, then bend around a temperature conditioned 25 mm dia mandrel. 3.12.1 As received No cracks 3.12.2 After aging per para 3.7 No cracks 4. GENERAL INFORMATION The informatio
22、n given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES HNBR (ISO 1043) 4.2 APPROVAL OF MATERIALS Suppliers desiring approva
23、l of their materials shall first obtain an expression of interest from Purchasing, Design or Product Development, and Materials Engineering. The supplier shall submit a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstr
24、ating full compliance with all the requirements of the Material Specification. Tested material samples must be available for review upon request and kept for a minimum of one year. Upon request, the supplier will review the associated quality control documents (Process Failure Mode and Effects Analy
25、sis, Control Plans, Certification testing) with Ford. 4.3 SUPPLIERS ONGOING RESPONSIBILITY All materials must be equivalent in all characteristics to the material upon which approval was originally granted. Prior to making any changes to the material originally approved, whether or not such changes
26、affect the materials ability to meet the specification requirements, the supplier shall notify the affected Supplier Technical Assistance (STA), Purchasing, and Materials Engineering activities of the proposed changes (with reasons) by submission of a completed Suppliers Request for Engineering Appr
27、oval, SREA. ENGINEERING MATERIAL SPECIFICATION WSS-M2D451-B3 Copyright 2016, Ford Global Technologies, LLC Page 5 of 6 For parts and components using Ford Engineering Material Specifications, all samples tested to the specifications for Design Verification (DV), Production Verification (PV) and Prod
28、uction Part Approval Process (PPAP) sign off must be kept until Job 1. 4.4 RESTRICTED SUBSTANCE MANAGEMENT STANDARD Substance restrictions imposed by regulations or Company direction applies to the materials addressed by this document. The restrictions are identified in the Restricted Substance Mana
29、gement Standard WSS-M99P9999-A1 which is updated yearly. It is the suppliers responsibility to comply with this standard on a continuing basis through IMDS and or GMAP reporting. Table 1: Minimum Sample Size Initial Approval New Manufacturing Location for Previously Approved Material Para. Test Min
30、Lots Specimens per Lot Total Test Specimens Lots Specimens per lot Total Test Specimens 3.6.1 Density 1 3 3 1 3 3 3.6.2 Hardness, IRHD 1 5 locations 1 1 5 locations 1 3.6.3 Hardness, Durometer A 1 5 locations 1 1 5 locations 1 3.6.4 Tensile Strength at Break 3 5 15 1 5 5 3.6.5 Elongation at Break 3
31、5 15 1 5 5 3.6.6 Tensile Modulus at 100% 1 10 10 1 5 5 3.6.7 Tear Strength 1 3 3 1 3 3 3.6.8 Ozone Resistance 1 3 3 1 3 3 3.6.9 Compression Set 1 3 3 1 3 3 3.7 Heat Aging Performance, 168h at 150C 3.7.1 Hardness Change 1 5 locations 1 1 5 locations 1 3.7.2 Tensile Strength Change 1 5 5 1 5 5 3.7.3 V
32、isual Evaluation 1 1 1 1 1 1 3.8 Heat Aging Performance, 1000h at 135C 3.8.1 Hardness Change 1 5 locations 1 3.8.2 Tensile Strength Change 1 5 5 3.8.3 Visual Evaluation 1 1 1 3.9 Immersion in SF105 Oil 3.9.1 Hardness Change 1 5 locations 1 3.9.2 Tensile Strength Change 1 5 5 3.9.3 Elongation at Brea
33、k 1 5 5 3.9.4 Volume Change 1 1 1 3.9.5 Visual Evaluation 1 1 1 3.10 Immersion in Auto Trans Fluid 3.10.1 Hardness Change 1 5 locations 1 3.10.2 Tensile Strength Change 1 5 5 3.10.3 Elongation at Break 1 5 5 3.10.4 Volume Change 1 1 1 3.10.5 Visual Evaluation 1 1 1 3.11 Compression Stress Relaxation 1 3 3 3.12 Cold Test 3.12.1 As Received 1 3 3 1 3 3 3.12.2 After para 3.7 1 3 3 1 3 3 ENGINEERING MATERIAL SPECIFICATION WSS-M2D451-B3 Copyright 2016, Ford Global Technologies, LLC Page 6 of 6 5. SUMMARY OF REVISIONS 6/27/2016 Updated 3.10.3 from -30 to -35% Change.
