1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and enginee ring sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invit es your written comments and suggestions.Copyright 1998 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.
3、S.A.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-7154 FAX: (724) 776-0243TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS: http:/www.sae.org400 Commonwealth Drive, Warrendale, PA 15096-0001AEROS PACE MATERIAL SPECIFIC ATIONSubmitted for recognition as an American National
4、 StandardAMS 3812BIssued APR 1978 Revised JUL 1993Reaffirmed SEP 1998Superseding AMS 3812ARods, Glass Fiber, Polyester Resin, LoadedPultrusion1. SCOPE:1.1 Form: This specification covers coated round rods manufactured by the pultrusion process from glass fiber roving and a weather-resistant polyeste
5、r resin binder in the form of straight lengths or in coils.1.2 Application: These rods have been used typically for nonconductive tension elements in antenna supports where superior long-term weather resistance is required, but usage is not limited to such applications.1.3 Safety-Hazardous Materials
6、: While the materials, 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 wit
7、h the safe and proper 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 following publications form a part of this specification to the extent specified herein. The applicable issue of r
8、eferenced publications shall be the issue in effect on the date of the purchase order.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3812B SAE AMS 3812B- 2 -2.1 ASTM Publications: Available from A
9、STM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM D 149 Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power FrequenciesASTM D 638 Tensile Properties of PlasticsASTM D 638M Tensile Properties of Plastics (Metric)ASTM D 695
10、Compressive Properties of Rigid PlasticsASTM D 695M Compressive Properties of Rigid Plastics (Metric)ASTM D 785 Rockwell Hardness of Plastics and Electrical Insulating MaterialsASTM D 790 Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating MaterialsASTM D 790M Flexu
11、ral Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials (Metric)ASTM D 792 Specific Gravity (Relative Density) and Density of Plastics by DisplacementASTM D 2289 Tensile Properties of Plastics at High SpeedsASTM D 2584 Ignition Loss of Cured Reinforced ResinsASTM D
12、 2990 Tensile, Compressive, and Flexural Creep and Creep Rupture of Plastics2.2 U.S. Government Publications: Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.MIL-R-60346 Roving, Glass, Fibrous (for Prepreg Tape and Roving, Filament Wind
13、ing, and Pultrusion Applications)MIL-STD-105 Sampling Procedures and Tables for Inspection by AttributesMIL-STD-2073-1 DOD Materiel, Procedures for Development and Application of Packaging Requirements3. TECHNICAL REQUIREMENTS: 3.1 Material: Shall be rods of circular cross section, manufactured by t
14、he pultrusion process from the necessary number of unidirectional, continuous, glass fiber rovings and a polyester resin binder. The rods shall be coated for enhanced resistance to weathering and handling damage.3.1.1 Roving: Shall conform to MIL-R-60346, Type I, Class 2, and shall be free of splice
15、s.3.1.2 Resin Binder: Shall be a high-quality, weather-resistant, thermosetting polyester resin, cross-linked with styrene. The resin formulation may contain a catalyst, a die lubricant, and additives for enhanced weather resistance, flame retardance, and anti-tracking qualities, but it shall not co
16、ntain a wetting agent or a coupling agent, and shall be free of grease, oil, dirt, and other foreign matter.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3812B SAE AMS 3812B- 3 -3.1.3 Coating: Sh
17、all be primarily organic but may contain inorganic ingredients. It shall be applied uniformly over the cylindrical surfaces of the rods to a thickness of 0.010 inch 0.005 (0.25 mm 0.13).3.1.3.1 The surfaces of coated rods shall be smooth, nonporous, and free of cracks. The coating shall not contain
18、scratches, gouges or other handling damage. Scuff marks, occasional blisters not exceeding one in any 5 feet (1.5 m), pits, and other manufacturing imperfections will be acceptable provided that they neither penetrate to the substrate nor protrude above the surface by more than 3% of the finished ro
19、d diameter.3.1.3.2 The coating shall be flexible and adherent to the substrate, determined in accordance with 4.5.1 and 4.5.2.3.2 Fabrication: 3.2.1 Pultrusion: Pultrusion of the rods shall be performed in accordance with best practices of the pultrusion industry.3.2.2 Coiling: Coiling of rods shall
20、 not be attempted until the rods have cooled to below 100 F (38 C). The coil diameter shall be not less than 300 times the rod diameter, unless rods have passed the coiled storage test in accordance with 4.5.11 utilizing a smaller coil diameter.3.2.2.1 Rods furnished in straight lengths shall not be
21、 cut from coils.3.2.3 Post Curing: When specified by purchaser, straight rods exceeding 10 feet (3 m) in length shall be post-cured for not less than 15 hours at 275F10 (135 C 6). The rods shall be fully supported during post curing to avoid warping.3.3 Properties: Rods shall conform to requirements
22、 shown in Table 1; tests shall be performed on the rods supplied and in accordance with specified test methods, insofar as practicable.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3812B SAE AMS
23、3812B- 4 -3.4 Quality: Rods, as received by purchaser, shall be uniform in quality and condition, smooth, and free from foreign materials and from imperfections detrimental to usage of the rods.3.5 Tolerances: Shall be as follows3.5.1 Diameter: 3% of nominal.3.5.2 Length: Shall be as shown in Table
24、2.TABLE 1 - PropertiesParagraph Property Requirement Test Method3.3.1 Tensile Strength, minimum 100 ksi(689 MPa)4.5.33.3.2 Stress-Rupture Strength,minimum70.0 ksi(483 MPa)4.5.43.3.3 Flexural Strength, minimumAt 68 to 86 F (20 to 30 C)At -70 F 5 (-57 C 3)100 ksi(689 MPa)90.0 ksi(621 MPa)4.5.53.3.4 Vi
25、bration Fatigue StrengthAt 70.0 ksi (483 MPa) Pass4.5.63.3.5 Dielectric Strength, minimumDryWet100 volts per mil(3.94 kV/m)40 volts per mil(1.57 kV/m)4.5.73.3.6 Fiber Content PreproductionValue 3%4.5.83.3.7 Hardness, Rockwell E PreproductionValue 10%4.5.93.3.8 Transverse Tensile Strength Preproducti
26、onValue 20%4.5.103.3.9 Density PreproductionValue 10%ASTM D 792Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3812B SAE AMS 3812B- 5 -3.5.3 Straightness: The departure from straightness for rods f
27、urnished in straight lengths shall not exceed 0.04 inch per foot ( 3.1 mm per m) oflength.4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for Inspection: The vendor of rods shall supply all samples for vendors tests and shall be responsible for performing all required tests. Purchaser reserves t
28、he right to sample and to perform any confirmatory testing deemed necessary to ensure that the rods conform to the requirements of this specification.4.2 Classification of Tests: 4.2.1 Acceptance Tests: Tests for material (3.1), tensile strength (3.3.1), fiber content (3.3.6), hardness (3.3.7), tran
29、sverse tensile strength (3.3.8), density (3.3.9), quality (3.4), and tolerances (3.5) are acceptance tests and shall be performed on each lot.4.2.2 Periodic Tests: Tests for flexural strength (3.3.3) are periodic tests and shall be performed at a frequency selected by the vendor unless frequency of
30、testing is specified by purchaser.4.2.3 Preproduction Tests: Tests for all technical requirements are preproduction tests and shall be performed prior to or on the initial shipment of rods to a purchaser, when a change in ingredients and/or processing requires reapproval as in 4.4.2, and when purcha
31、ser deems confirmatory testing to be required except that the coiled storage test (4.5.11) is not required unless rod is to be supplied in coil diameters less than 300 times the rod diameter. TABLE 2A - Length Tolerances, Inch/Pound UnitsNominal LengthFeetToleranceFeetUp to 10, incl +0.10, -0Over 10
32、 to 50, incl +0.25, -0Over 50 +1.0, -0TABLE 2B - Length Tolerances, SI UnitsNominal LengthMetersToleranceMetersUp to 3, incl +0.03, -0Over 3 to 15, incl +0.08, -0Over 15 +0.30, -0Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted w
33、ithout license from IHS-,-AMS 3812B SAE AMS 3812B- 6 -4.2.3.1 For direct U.S. Military procurement, substantiating test data and, when requested, preproduction test material shall be submitted to the cognizant agency as directed by the procuring activity, contracting officer, or request for procurem
34、ent.4.3 Sampling and Testing: Shall be as follows:4.3.1 For Acceptance Tests: Shall be in accordance with Single Sampling for Normal Inspection, General Inspection Level II, specified in MIL-STD-105 as shown in Table 3. Test specimens shall be taken from rods selected at random throughout each lot.
35、The number of determinations for each requirement shall be as specified in the applicable test procedure or, if not specified therein, not less than three.4.3.1.1 A lot shall be all rod produced from the same batches of ingredients, using the same processing conditions on the same machine, in not lo
36、nger than 24 hours, and presented for vendors inspection at one time.4.3.1.2 An inspection unit shall be each coil or 1000 feet (305 m) of rod, whichever is smaller, using both ends of each coil.4.3.1.2.1 If the number of inspection units to be sampled equals or exceeds the lot size, inspect each un
37、it.4.3.1.3 After ten consecutive lots meet Table 3 requirements, inspection sampling may be reduced for the product of that machine to Special Inspection Level S-1, MIL-STD-105, wherein the Single Sample Size is 3 and the Acceptance Number is 0. Should any rejection occur, sampling shall be returned
38、 to that of Table 3 for at least ten consecutive satisfactory production lots.TABLE 3 - Inspection Unit SamplingNumber ofInspection Unitsin the lotNumber ofInspection Unitsfrom WhichSamples areto be TakenNumber of NonconformingSamplestoAcceptNumber ofNonconformingSamplestoReject1 to 50 8 (4.3.1.2.1)
39、 0 151 to 90 13 1 291 to 150 20 1 2151 to 280 32 2 3281 to 500 50 3 4Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3812B SAE AMS 3812B- 7 -4.3.2 For Periodic Tests and Preproduction Tests: As agr
40、eed upon by purchaser and vendor. 4.4 Approval: 4.4.1 Sample rod shall be approved by purchaser before rod for production use is supplied, unless such approval be waived by purchaser. Results of tests on production rod shall be essentially equivalent to those on the approved sample.4.4.2 Vendor shal
41、l use ingredients, manufacturing procedures, processes, and methods of inspection on production rod which are essentially the same as those used on the approved sample. If necessary to make any change in ingredients, in type of equipment for processing, or in manufacturing procedures, vendor shall s
42、ubmit for reapproval a statement of the proposed changes in ingredients and/or processing and, when requested, sample rod. Production rod made to the revised procedure shall not be shipped prior to receipt of reapproval.4.5 Test Methods: 4.5.1 Coating Flexibility: Shall be determined in accordance w
43、ith ASTM D 2289-84 using a specimen of full-diameter rod having length not exceeding 50 times the rod diameter. The specimen shall be subjected to an axial tensile stress of 70.0 ksi (483 MPa) using a testing speed which attains the required tensile load in not more than one second. Any loading meth
44、od which meets this requirement may be used, including high-speed testing machines and drop weights. The specimen shall be examined, using not over 10X magnification, not less than 12 hours after the load is removed. Hairline cracks in the coating in a direction transverse to the rod axis or other e
45、vidence of coating damage are not acceptable.4.5.2 Coating Adhesion: Shall be determined using a specimen of full-diameter rod. A transverse saw cut shall be made on the surface of the specimen to a depth of one-fourth to one-third of the rod diameter. Using the point of a sharp instrument, such as
46、a penknife or surgical blade, attempt to pry off the coating at the edges of the saw cut. If a single piece of coating having a surface area greater than 1/8 inch (3.2 mm) square can be flaked off cleanly from the substrate, the rod is not acceptable.4.5.3 Tensile Strength: Shall be determined in ac
47、cordance with ASTM D 638 or ASTM D 638M. The specimen shall be a full-diameter rod having length not less than 100 times the rod diameter, to which high-performance end fittings or grips have been attached. The specimen shall be loaded to a tensile stress of 100 ksi (689 MPa) and the load maintained
48、 for not less than one minute without visible or audible evidence of incipient failure. A mechanical failure of the specimen, initiating in an end fitting or grip prior to completion of the one-minute interval, shall constitute an invalid test. In case of dispute between purchaser and vendor, result
49、s obtained using end fittings or grips conforming to vendors specifications shall govern.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3812B SAE AMS 3812B- 8 -4.5.4 Stress-Rupture Strength: Stressed exposure to simulated weather conditions shall be in accordance with ASTM D 2990 and as follows4.5.4.1 The specimen shall be a f
