1、SAE Technical Standards Board Rules proviGHWKDW7KLVUHSRUWLVSXEOLVKHGE6$(WRDGYDQFHWKHVWDWHRIWHFK QLFDODQGHQJLQHHULQJVFLHQFHV7KHXVHRIWKLVUHSRUW isentirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therHIURPLVWKHVROHUHVSRQVLELOLW
2、RIWKHXVHUSAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2016 SAE InternationalAll rights reserved. No part of this publication may be reproduced, stored in
3、a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE.TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada)Tel: +1 724-776-4970 (outside USA)Fax: 724-776-0790Email: Cus
4、tomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on thisTechnical Report, please visithttp:/standards.sae.org/AMS3644GAEROSPACEMATERIAL SPECIFICATIONAMS3644REV. GIssued 1979-07Revised 200-09Reaffirmed 2016-11Superseding AMS3644FPlastic: PolyimideFor Mol
5、ded Rod, Bar, and Tube, Plaque, and Formed PartsRATIONALEAMS3644G has been reaffirmed to comply with the SAE five-year review policy.1. SCOPE1.1 Form This specification covers a polyimide plastic in the form of isostatically molded rod, bar, and tube, unidirectionally molded plaque, and direct forme
6、d parts. 1.2 Application These products are used typically for bushings, bearings, seals, and thermal-electrical insulators requiring a combination of toughness, low coefficient of friction, low wear, low creep, and good solvent resistance, but usage is not limited to such applications. Each applica
7、tion should be considered separately. Polyimide covered by this specification has a service temperature range of cryogenic to 500 F (260 C). These materials have no observable glass transition temperature (Tg) or melt temperature (Tm). 1.3 Classification Product is classified on the amount of filler
8、 used with the base polyimide polymer as follows: Class 1 Unfilled Class 2 15% 3 by weight graphite Class 3 37% 3 by weight graphite Class 4 15% 3 by weight graphite plus 10% 3 by weight polytetrafluoroethylene (PTFE) Class 5 15% 3 by weight molybdenum disulfide and by the process used to produce th
9、e product as follows: Form M Isostatically molded rod, bar, and tube Form P Unidirectional molded plaque Form D Direct formed parts 1.3.1 The class and form of product supplied shall be as ordered by purchaser. SAE INTERNATIONAL AMS3644G Page 2 of 7 1.4 Safety - Hazardous Materials While the materia
10、ls, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and prop
11、er use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved. 2. APPLICABLE DOCUMENTS The purchase order date shall stipulate the published document that shall be in effect. The supplier may work to a subsequent revision unl
12、ess a particular revision is specified. When the referenced document has been canceled and no superseding document has been specified, the last published revision shall apply. 2.1 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2
13、959, Tel: 610-832-9585, www.astm.org. ASTM D 638 Tensile Properties of Plastics ASTM D 695 Compressive Properties of Rigid Plastics ASTM D 790 Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials ASTM D 792 Density and Specific Gravity (Relative Density) of
14、 Plastics by Displacement ASTM D 1708 Tensile Properties of Plastics By Use of Microtensile Specimens ASTM D 2714 Calibration and Operation of the Falex Block-on-Ring Friction and Wear Testing Machine ASTM D 4065 Standard Practice for Plastics: Dynamic Mechanical Properties: Determination and Report
15、 of Procedures ASTM E 8 Tension Testing of Metallic Materials ASTM E 8M Tension Testing of Metallic Materials (Metric) ASTM E 1545 Assignment of the Glass Transition Temperature by Thermomechanical Analysis 3. TECHNICAL REQUIREMENTS 3.1 Material Moldings shall be manufactured from virgin, unplastici
16、zed polyimide polymer, produced as poly,N,N-(p,p -oxidiphenylene) pyromellitimide, unfilled or filled, ready for machining and use. 3.2 Color Shall be natural and may vary, as specified in Table 1, depending on the filler material used. 3.3 Properties The product shall conform to the tables below wh
17、en tested in accordance with 4.5. SAE INTERNATIONAL AMS3644G Page 3 of 7 TABLE 1 - PROPERTIES AT 73 F 2, INCH/POUND UNITS AND AT 23 C 1, SI UNITS Class/ Form Color Tensile Strength, min ksi MPa Elongation%, min Compressive Strength, min ksi MPa Flexural Strength, min ksi MPa Specific Gravity min Coe
18、fficient of Friction 1M 1P 1D 2M 2P 2D 3M 3P 3D 4M 4P 4D 5M 5P Brown Brown Tan/Brown Black Black Black Black Black Black Black Black Black Gray/Black Gray/Black 11.0 76 8.5 59 9.5 66 8.0 55 6.5 45 8.0 55 6.5 45 4.7 32 6.0 41 5.5 38 3.5 24 6.5 45 4.0 28 3.0 21 4.8 4.5 5.0 3.5 3.0 3.5 1.3 1.3 1.8 2.0
19、2.0 4.0 1.1 1.4 35.0 241 27.0 186 27.0 186 27.0 185 23.5 162 25.0 172 16.0 110 15.0 103 15.0 103 16.0 110 15.0 103 15.0 103 - - 15.0 103 12.0 83 10.0 69 12.0 83 9.5 66 11.0 76 8.0 55 7.5 52 8.0 55 8.5 59 5.5 38 8.0 55 8.0 55 9.4 65 1.42 1.40 1.33 1.49 1.47 1.41 1.64 1.64 1.55 1.54 1.54 1.43 1.57 1.5
20、7 0.20 to 0.40 0.20 to 0.40 0.20 to 0.55 0.10 to 0.30 0.10 to 0.30 0.10 to 0.30 0.10 to 0.30 0.10 to 0.30 0.10 to 0.30 0.10 to 0.30 0.10 to 0.30 0.10 to 0.30 - - TABLE 2 - PROPERTIES AT 500 F 5, INCH/POUND UNITS AND AT 260 C 3, SI UNITS Class/ Form Tensile Strength, min ksi MPa Elongation%, min Comp
21、ressive Strength, min ksi MPa Flexural Strength, min ksi MPa 1M 1P 1D 2M 2P 2D 3M 3P 3D 4M 4P 4D 5.0 34 4.0 28 5.0 34 4.3 30 3.7 26 4.0 28 3.0 21 2.0 14 3.5 24 2.5 17 2.0 14 3.0 21 4.0 4.0 4.5 2.5 2.0 2.5 0.8 0.8 1.0 1.8 1.5 3.0 12.0 83 11.0 76 10.0 69 10.0 69 10.0 69 8.5 59 10.0 69 8.0 55 9.0 62 8.
22、0 55 8.0 55 7.5 52 8.0 55 7.0 48 6.0 41 6.0 41 5.0 34 5.5 38 4.5 31 4.0 28 5.0 34 5.0 34 3.5 24 4.0 28 3.3.1 Dimensional stability of raw stock or fabricated parts shall not change more than 0.0015 inch per inch (0.038 mm per mm), measured at 68 to 86 F (20 to 30 C) before and after being held for 2
23、4 hours 0.5 at 500 F 9 (260 C 5) in air. Before initial measurement, specimens shall be conditioned at 302 F 9 (150 C 5) for 24 hours 0.5. 3.3.2 Glass transition temperature shall be analyzed by ASTM E 1545 with no change in the slope of the curve between room temperature and 752 F (400 C). 3.3.3 Dy
24、namic mechanical analysis in accordance with ASTM D 4065 at 1 Hz, 73 to 662 F (23 to 350 C) at 9 F (5 C) per minute heat rate shall show no change in the slope of the modulus (E) versus temperature curve. 3.4 Quality The product, as received by purchaser, shall be uniform in quality and condition, s
25、mooth, as free from foreign material as commercially practicable, and free from imperfections detrimental to usage of the product. SAE INTERNATIONAL AMS3644G Page 4 of 7 3.5 Tolerances Shall be as shown in Table 3 for forms M and P. Tolerances for form D shall be in the range 0.002 to 0.006 inch per
26、 inch (0.05 to 0.15 mm per mm) of dimension. Measurements shall be made at 68 to 86 F (20 to 30 C) except that closer temperature control may be required for large dimensions. TABLE 3 - FORMS M AND P MAXIMUM DIAMETER TOLERANCES, INCH/POUND UNITS AND SI UNITS Nominal Diameter Inch Nominal Diameter Mi
27、llimeters Tolerance Plus-Only Inch Tolerance Plus-Only Millimeters 0.250 to 1.000, incl Over 1.000 to 2.000, incl Over 2.000 to 3.500, incl Over 3.500 6.35 to 25.40, incl Over 25.40 to 50.80, incl Over 50.80 to 88.90, incl Over 88.90 0.025 0.050 0.070 As specified by purchaser 0.64 1.27 1.78 As spec
28、ified by purchaser 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The manufacturer of the product shall be responsible for performance of all required tests. Purchaser reserves the right to sample and perform any testing deemed necessary to ensure that the product conforms to the
29、AMS requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Performed on each lot. The product shall conform to the table below. TABLE 4 - ACCEPTANCE TESTS Test Requirement Method Tensile Strength TABLE 1 4.3.1 Elongation TABLE 1 4.3.1 Specific Gravity TABLE 1 4.3.3 4.2.1.1 Random Sampling
30、The method shall be specified in a purchase order/contract, otherwise product shall be taken at random from each lot to perform all the required acceptance tests. The number of test iterations for each requirement shall be specified in the applicable test procedure. 4.2.1.1.1 Lot A quantity of produ
31、ct processed and packaged as one production entity from a batch. 4.2.1.2 A statistical sampling plan, acceptable to purchaser, may be used in lieu of sampling as in 4.2.1.1 and the report of 4.5 shall state that such plan was used. 4.2.2 Preproduction Tests All technical requirements shall be perfor
32、med prior to or on the initial shipment of the product to a purchaser when a change in ingredients and/or processing requires reapproval and when purchaser deems confirmatory testing to be required. SAE INTERNATIONAL AMS3644G Page 5 of 7 4.2.2.1 Manufacturer shall use ingredients, manufacturing proc
33、edures, processes, and methods of inspection on production product which are essentially the same as those used on the approval sample. If any change in ingredients, in type of equipment for processing, or in manufacturing procedures is necessary, manufacturer shall submit for reapproval a statement
34、 of the proposed changes in ingredients and/or processing and, when requested, sample product. Production product made by the revised procedure shall not be shipped prior to receipt of reapproval. 4.2.2.2 Random Sampling Shall be acceptable to purchaser. 4.3 Test Methods Property tests shall be perf
35、ormed in accordance with the following test methods and 3.3.1, 3.3.2, and 3.3.3. All specimens shall be equilibrated as described in the appropriate ASTM or other method. Elevated temperature test specimens shall equilibrate at least 30 minutes at temperature before testing. 4.3.1 Tensile Strength a
36、nd Elongation Shall be determined in accordance with ASTM D 638 with Forms M and P tensile bars fabricated according to ASTM D 1708 and form D tensile bars fabricated according to ASTM E 8 or ASTM E 8M powdered metal products test specimen. Crosshead speed for types M and P specimens shall be 0.05 i
37、nch per minute (0.02 mm/s) and for type D specimens 0.2 inch per minute (0.08 mm/s). 4.3.2 Compressive Strength at 73 F (23 C) Shall be determined in accordance with ASTM D 695. 4.3.3 Flexural Strength Shall be determined in accordance with ASTM D 790. Ultimate flexural strength may require the test
38、 to be run beyond 5% strain. 4.3.4 Specific Gravity at 73 F (23 C) Shall be determined in accordance with ASTM D 792. 4.3.5 Coefficient of Friction Shall be determined using the equipment described in ASTM D 2714 with a conforming block. Normal force readings from a time 1.5 hours after test start t
39、o at least 8 hours after test start are used to determine the coefficient of friction. An alternate method agreed upon by purchaser and manufacturer is acceptable. 4.4 Approval Sample product shall be approved by purchaser before product for production use is supplied, unless such approval be waived
40、 by purchaser. Results of tests on production product shall be essentially equivalent to those on the approved sample. 4.5 Reports The supplier of the product shall furnish with each shipment a report showing the results of tests to determine conformance to the acceptance test requirements and stati
41、ng that the product conforms to the other technical requirements. This report shall include the purchase order number, lot number, AMS 3644G, class and form, manufacturers identification, size or part number, and quantity. SAE INTERNATIONAL AMS3644G Page 6 of 7 4.6 ResamplIng and Retesting If any sp
42、ecimen fails, a retesting of three additional specimens for each nonconforming specimen shall be necessary for product acceptance. Failure of any retest specimen shall be cause for rejection. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Packaging and Identification 5.1.1 P
43、ackaging shall be accomplished to ensure that the product, during shipment and storage, will not be permanently distorted and will be protected against damage from exposure to weather or any other normal hazard. 5.1.1.1 A lot of product may be packaged in small quantities and delivered under the bas
44、ic lot approval provided lot identification is maintained. 5.1.2 Each package shall be permanently and legibly marked with not less than the following information: POLYIMIDE, MOLDED* AMS 3644G* MANUFACTURERS IDENTIFICATION LOT NUMBER SIZE OR PART NUMBER QUANTITY PURCHASE ORDER NUMBER *Add “ROD“, “BA
45、R“, “TUBE“, “PLAQUE“, or “PARTS“ as applicable. *Add applicable class and form designation as appropriate. 5.1.3 Packages of the product shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the handling, packaging
46、 and transportation of the product to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A supplier shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Product not conforming to this specification, or to
47、 modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A change bar (|) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this specification. An (R) sym
48、bol to the left of the document title indicates a complete revision of the specification, including technical revisions. Change bars and (R) are not used in original publications, nor in specifications that contain editorial changes only. 8.2 Terms used in AMS are clarified in ARP1917. 8.3 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius te
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