1、 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. AUGUST 2014 Page 1 of 11 NAVISTAR, INC. Material, Parts, and Process Specificatio
2、ns (MPAPS) NUMBER: MPAPS K-15 Former Designation: CEMS D-15 Part II TITLE: O Ring Material and Design CURRENT Rev. No.: 1408 DATE: AUGUST 2014 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: CEMS D-15 Pt II Dec. 2001 PRINTED COPIES OF THIS DOCUMENT MUST BE V
3、ERIFIED FOR CURRENT REVISION This specification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the
4、 applicability of regulatory limits prior to use. Change Notice: Changed to new MPAPS format; editorial changes. 1.0 SCOPE This specification provides basic material application information for elastomeric O-rings, along with design requirements via a checklist in MPAPS K-15 Appendix. NOTE: The mate
5、rial classes called out here refer to the general elastomer families (FKM, EPDM, Nitrile, etc., in the Engineering Standards Parts specifications) and the physical property tests called out are short term tests that provide only a general indication of material and fluid compatibility, not long term
6、 seal performance. Within each elastomer class (family), there are many different compound numbers (formulations) available; every supplier has their specific rubber compounds with different performance characteristics. In most cases, specific compound numbers will be required for print sign-off to
7、define and lock down qualified compounds that have passed long term tests. Consult Materials Engineering for guidance. Refer to MPAPS K15-5003A for approved FKM compound numbers from various suppliers. For seal joints where specific elastomer compound control is not required, one can refer to the En
8、gineering Standard Parts specifications, Sections S and SM, for O-ring part numbers. 2.0 INTRODUCTION “O” ring seals are used to prevent leakage in joints of systems carrying various types of fluids at various pressure levels. 2.1 Restricted Chemical Substances Effective January 1, 2007, all product
9、 supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification. 3.0 CONTENTS PAGE REFERENCE DOCUMENTS 2 CLASSIFICATION OR GRADE DESIGNATION 2 GENERAL REQUIREMENTS 3 QUALITY 9 METHODS OF TEST 9 SOURCE APPROVAL AND QUALITY CONTROL 10 DESIGNATION O
10、N DRAWINGS AND PURCHASE ORDERS 10 NUMBER: MPAPS K-15 TITLE: O Ring Material and Design REVISION: 1408 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 201
11、4 by Navistar, Inc. AUGUST 2014 Page 2 of 11 4.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following standards, specifications and regulations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 ASTM D
12、 573 NAVISTAR MPAPS B-50 ASTM D 1414 NAVISTAR Manufacturing Standard MS-D-13 ASTM D 1415 CFR Title 29, Part 1910 ASTM D 1418 NAVISTAR CEMS DT-1 ASTM D 2000 NAVISTAR CEMS DT-6 SAE J200 5.0 CLASSIFICATION OF COMPOUNDS The O ring seal materials are classified by material type, hardness, and application
13、. Six classes of compounds are covered by this specification, listed with their intended usage, in Table I below. TABLE I - CLASSIFICATION OF COMPOUNDS Designation Typical Material (Rubber) Hardness Shore A Application Resistant to NAVISTAR Class Obsolete NAVISTAR Class Approx ASTM D 1418 Approx SAE
14、 J200, ASTM D 2000 3 - EPDM CA ethylene propylene 70 - 80 static nonmineral oils, alcohols, brake fluids or fire resistant fluids such as phosphate esters 3A - EPDM CA ethylene propylene 85 - 95 same as Class 3 for use with greater pressures and more severe operating conditions same as Class 3 5 1,2
15、 NBR BK nitrile 70 80 static and dynamic close tolerances gasoline, oils, hydraulic fluids, water and 50:50 water ethylene glycol 6 4 NBR BK nitrile 85 95 same as Class 5 for use with greater pressures and more severe operating conditions same as Class 5 7 - FPM HK fluoro- carbon 70 80 static and li
16、ght dynamic duty and high temperature hydraulic fluids, fuels and lubricants at temperatures -40C (-40F) to 230C (450F) * 8 - FPM HK fluoro- carbon 85 95 same as Class 7 for use with greater pressures same as Class 7 * *Certain base-resistant FPM, Class 7 and 8 Compound Numbers will perform satisfac
17、torily in water and water-ethylene glycol environments. The appropriate materials engineering department should be consulted regarding these applications of Class 7 and 8 rings. NUMBER: MPAPS K-15 TITLE: O Ring Material and Design REVISION: 1408 This document is restricted and may not be sent outsid
18、e Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. AUGUST 2014 Page 3 of 11 5.1 Engineering Qualification Production material can be furnished under this specification only after formal E
19、ngineering Qualification. The appropriate purchasing department (refer to the Corporate Purchasing Delegation Manual available from Purchasing and Supplier Development), or Group Engineering facility provided the delegated buyers are notified, will request Materials Engineering, or a Materials Engin
20、eering designated facility, to conduct the Engineering Qualification tests with the supplier furnishing all the required samples. Materials submitted for qualification will be accompanied by detailed test information and also by certification that the material meets all requirements of this specific
21、ation. After the material has been tested by the approved facility, the design engineering departments will be notified and, if appropriate, invited to conduct performance tests as deemed necessary. On completion of these tests, the purchasing departments involved and all engineering departments wil
22、l be notified that the material has been either qualified or rejected. Material subsequently supplied to this specification will have the same formulation as the qualification samples. Any change in composition or method of manufacture will void the qualification and preclude the materials usage for
23、 NAVISTAR. After reviewing the details of the proposed change in material composition or method of manufacture, the appropriate International purchasing and engineering departments and Materials Engineering may elect to waive requalification evaluations and grant qualification to the product. Sample
24、s submitted for test will consist of 200 SAE 214 O rings and 6 ASTM test buttons and slabs. 6.0 GENERAL REQUIREMENTS Requirements for rings of Classes 3, 3A, 5, 6, 7, and 8 are shown in Tables II, III, IV, V, and VI. Inspection tests will be conducted on production rings except where size makes this
25、 impractical. In these instances, the supplier will furnish the same compound in SAE 214 O rings, unless other suitable size O rings are specifically requested by the NAVISTAR manufacturing plant. TABLE II - PROPERTY REQUIREMENTS FOR CLASSES 3 AND 3A PROPERTY CLASS 3 CLASS 3A ORIGINAL PROPERTIES Har
26、dness, Shore A 70 to 80 85 to 95 Tensile Strength, min psi 1200 1000 MPa 8.3 6.9 Ultimate Elongation, % min 100 80 Modulus at 100% Elongation psi 400 800 MPa 2.8 8.5 HEAT AGED PROPERTIES Aged 70 hours at Aging Temp 100C (212F) 100C (212F) Hardness, points change from original hardness, max +10 +10 T
27、ensile Strength, % change from original tensile strength, max -15 -20 Elongation, % change from original elongation, max -45 -50 NUMBER: MPAPS K-15 TITLE: O Ring Material and Design REVISION: 1408 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission
28、 from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. AUGUST 2014 Page 4 of 11 COMPRESSION SET PROPERTIES Compression Set, 70 hours at set temperature 100C (212F) 100C (212F) Compression Set, % max thickness to 0.110 inch (2.8 mm), incl 50
29、 50 thickness over 0.110 inch (2.8 mm) 45 45 FLUID AGED PROPERTIES CLASS 3 CLASS 3A 70 hours at Aging Temp 100C (212F) 100C (212F) Type of Fluid hydraulic brake fluid per SAE J 1703 hydraulic brake fluid per SAE J 1703 Hardness, points change from original -15 max -15 max Tensile Strength, % change
30、from original, max -45 -45 Elongation, % change from original, max -45 -50 Volume, % change from original +15 max 0 to +20 LOW TEMPERATURE AGED PROPERTIES CLASS 3 CLASS 3A Aged as Received Aged as Received Aged 5 hours at Aging Temp -40C (-40F) -30C (-22F) Figure 8 Bend Test no cracks no cracks TABL
31、E III PROPERTY REQUIREMENTS FOR CLASS 5 PROPERTY CLASS 5 ORIGINAL PROPERTIES Hardness, Shore A sheet specimens 70 to 80 rings 70 to 80 Tensile Strength, min ring thickness thru 0.175 inch 1750 psi (12.1 MPa) thru 4.4 mm over 0.175 in thru 0.250 in 1575 psi (10.9 MPa) over 4.4 mm thru 6.4 mm over 0.2
32、50 inch 1400 psi (9.7 MPa) over 6.4 mm Ultimate Elongation, % min, rings 225 Modulus, min, rings at 50 % elongation - at 100% elongation 400 psi (3.0 MPa) HEAT AGED PROPERTIES Aged 70 hours at Aging Temp 125C (257F) Hardness, points change from original hardness, rings 0 to +7 Tensile Strength, % ch
33、ange from original tensile, rings -15 to +20 Elongation, % change from original elongation, rings 0 to 40 NUMBER: MPAPS K-15 TITLE: O Ring Material and Design REVISION: 1408 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technic
34、al Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. AUGUST 2014 Page 5 of 11 Bend Require- ments sheet specimens: 180 bend no cracks rings: compress to figure 8 no cracks COMPRESSION SET PROPERTIES Compression Set, 22 hours at set temp 100C (212F) Com- pressio
35、n Set, % max ASTM discs 6 ring thick- ness thru 0.110 inch 20 thru 2.8 mm over 0.110 inch 15 over 2.8 mm FLUID AGED PROPERTIES Aging Temperature 125C (257F) 23C (73F) 100C (212F) Hours Aging, rings up to 0.140 inch (3.6 mm) cross section 70 70 70 Hours Aging, rings up to 0.210 inch (5.1 mm) cross se
36、ction 118 118 118 Hours Aging, rings up to 0.275 inch (7.0 mm) cross section 142 142 142 Property Change from Original ASTM Oil No. 1 ASTM Oil No. 3 CEMS Fluid ASTM Fuel A ASTM Fuel B water 50-50 water ethylene-glycol Hardness points, all sizes 0 to +5 0 to 5 5 0 to 5 0 to 15 5 5 Tensile Strength %,
37、 all sizes 15 15 20 +10 to 15 0 to 60 15 15 Elongation %, all sizes 0 to 30 0 to 30 0 to 30 +5 to 20 0 to 40 +5 to 20 +5 to 15 Volume %, all sizes 0 to 4.5 0 to +10 0 to +6 0 to +4 0 to +30 0 to +10 0 to +10 Dryout Volume, all sizes 4 hours at 125C (257F) - - - 0 to -3 0 to 5 - - OIL AGED DEGRADATIO
38、N PROPERTIES Fluid Aged 14 days at Aging Temp 125C (257F) Type Fluid ASTM Oil No. 2 CEMS B-6 Fluid Tensile Strength, % change from original tensile strength, all sizes 0 to 60 0 to 60 Elongation, % change from original elongation, all sizes 0 to 70 0 to 70 LOW TEMPERATURE AGED PROPERTIES Aged 5 hour
39、s at Aging Temp -30C (-22F) Bend Require- ments sheet specimen: half loop bend test no cracks rings: compress 25% of ID no cracks TABLE IV PROPERTY REQUIREMENTS FOR CLASS 6 PROPERTY CLASS 6 ORIGINAL PROPERTIES Hardness, Shore A sheet specimens 85 to 95 rings 85 to 95 Tensile Strength, ring thickness
40、 thru 0.175 inch 2000 psi (13.8 MPa) thru 4.4 mm Type of Fluid NUMBER: MPAPS K-15 TITLE: O Ring Material and Design REVISION: 1408 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to ass
41、ume all patent liability. 2014 by Navistar, Inc. AUGUST 2014 Page 6 of 11 min over 0.175 in thru 0.250 in 1800 psi (12.4 MPa) over 4.4 mm thru 6.4 mm over 0.250 inch 1600 psi (11.0 MPa) over 6.4 mm Ultimate Elongation, % min, rings 100 Modulus, min, rings at 50 % elongation 600 psi (4.0 MPa) at 100%
42、 elongation - HEAT AGED PROPERTIES Aged 70 hours at Aging Temp 125C (257F) Hardness, points change from original hardness, rings 0 to +5 Tensile Strength, % change from original tensile, rings 15 Elongation, % change from original elongation, rings 0 to 50 Bend Require- ments sheet specimens: 180 be
43、nd no cracks rings: compress to figure 8 no cracks COMPRESSION SET PROPERTIES Compression Set, 22 hours at set temp 100C (212F) Com- pression Set, % max ASTM discs 6 ring thick- ness thru 0.110 inch 20 thru 2.8 mm over 0.110 inch 15 over 2.8 mm FLUID AGED PROPERTIES Aging Temperature 125C (257F) 23C
44、 (73F) 100C (212F) Hours Aging, rings up to 0.140 inch (3.6 mm) cross section 70 70 70 Hours Aging, rings up to 0.210 inch (5.1 mm) cross section 118 118 118 Hours Aging, rings up to 0.275 inch (7.0 mm) cross section 142 142 142 Property Change from Original ASTM Oil No. 1 ASTM Oil No. 3 CEMS B-6 Fl
45、uid ASTM Fuel A ASTM Fuel B water 50-50 water ethlene-glycol Hardness points, all sizes 0 to +5 0 to 5 5 0 to 5 0 to 15 5 5 Tensile Strength %, all sizes 15 15 20 +10 to 15 0 to 50 15 15 Elongation %, all sizes 0 to 40 0 to 30 0 to 30 +5 to 20 0 to 30 +5 to 20 +5 to 15 Volume %, all sizes 0 to 4.5 0
46、 to +9 0 to +6 0 to +4 0 to +30 0 to +10 0 to +10 Dryout Volume, all sizes 4 hours at 125C (257F) - - - 0 to -3 0 to -5 - - OIL AGED DEGRADATION PROPERTIES Fluid Aged 14 days at Aging Temp 125C (257F) Type Fluid ASTM Oil No. 2 CEMS B-6 Fluid Tensile Strength, % change from original tensile strength,
47、 all sizes 0 to 60 0 to 60 Elongation, % change from original elongation, all sizes 0 to 70 0 to 70 Type of Fluid NUMBER: MPAPS K-15 TITLE: O Ring Material and Design REVISION: 1408 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. AUGUST 2014 Page 7 of 11 LOW TEMPERATURE AGED PROPERTIES Aged 5 hours at Aging Temp -30C (-22F) Bend Require- ments sheet specimen:
