1、SAE Technical Standards Board Rules provide that: This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom
2、, 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 invites your written comments and suggestions.Copyright 2001 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.
3、TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS: http:/www.sae.org400 Commonwealth Drive, Warrendale, PA 15096-0001AEROSPACE STANDARDAS4843Issued 1995-05Reaffirmed 2001-12Fittings, Beaded, Fluid Connection1. SCOPE:1.1 Scope:This SAE Aerospace Standard (AS) establishes t
4、he requirements for beaded fluid connection fittings (see Section 6) for use in all types of fluid systems.1.2 Classification:Fittings shall be furnished in the types and styles designated by the applicable AN or other engineering standard drawings. This specification is the same as MIL-F-5509 as ap
5、plicable to beaded fittings except for updated materials and process specifications and industry coordinated general improvements. It is intended to serve as a procurement specification for the fittings described herein and in Section 6.2. REFERENCES:2.1 Applicable Documents:The following publicatio
6、ns form a part of this specification to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this specification and refere
7、nces cited herein, the text of this specification takes precedence. Nothing in this specification, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or netw
8、orking permitted without license from IHS-,-SAE AS4843 - 2 -2.1.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AMS 4112 Aluminum Alloy Bars, Rods, and Wire, Rolled, Drawn, or Cold Finished 4.4Cu - 1.5Mg - 0.60Mn (2024-T6)AMS 4124 Bars, Rods, and Wire, Rolle
9、d, Drawn or Cold Finished, 5.62N 2.5Mg 1.6Cu 0.23CrAMS 4134 Aluminum Alloy Die Forgings 4.4Cu - 0.85Si - 0.80Mn - 0.50Mg (2014-T4) Solution Heat TreatedAMS 4141 Forgings, Die, 5.6Zn - 2.6Mg - 7.6Cu - 0.23Cr, Solution and Precipitation Heat TreatedAMS 4610 Bars and Rods, Brass, Free Cutting 61.5Cu 3.
10、1Pb 35Zn, Half Hard (H02)AMS 4614 Brass Forgings, Free Cutting 60Cu - 2.0Pb - 37.5Zn as Forged (M10)AMS 5639 Bars, Wire, Forgings, Tubing and Rings, 19Cr 10Ni Solution Heat TreatedAMS 5645 Steel Bars, Forgings, Tubing, and Rings, Corrosion and Heat Resistant 18Cr - 10Ni - 0.40Ti (SAE 30321) Solution
11、 Heat TreatedAMS 5646 Bars, Forgings, Tubing and Rings, 18Cr 11Ni 0.60 (Cr + Ta), Solution Heat TreatedAMS 5648 Bars, Forgings, Tubing and Rings, 17Cr 12Ni 2.5Mo, Solution Heat TreatedAMS 6370 Steel Bars, Forgings and Rings, 0.95Cr 0.20Mo (0.28-0.30C)AMS 6382 Steel Bars, Forgings and Rings, 0.95Cr 0
12、.20Mo (0.38-0.43C)AS478 Identification Marking MethodsAS1376 Alternate Dimensions, Center Body Section, Shape Fluid Fitting, Design StandardARP4784 Performance and Evaluation Criteria, Surface Defects, Requirements for2.1.2 U.S. Government Publications: Available from DODSSP, Subscription Services D
13、esk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.P-C-437 Cleaning Compound, High Pressure (Steam) CleanerQQ-A-225/6 Aluminum Alloy Bar, Rod, and Wire; Rolled, Drawn, or Cold Finished, 2024QQ-A-225/9 Aluminum Alloy Bar, Rod, Wire, and Special Shapes; Rolled, Drawn, or Cold Finished,
14、7075QQ-A-367 Aluminum Alloy ForgingsQQ-P-35 Passivation Treatments for Corrosion-Resisting SteelQQ-P-416 Plating, Cadmium (Electro-deposited)QQ-S-763 Steel Bars, Wire, Shapes and Forgings, Corrosion-ResistingMIL-S-5626 Steel: Chrome Molybdenum (4140) Bars, Rods and Forging Stock (For Aircraft Applic
15、ations)MIL-H-6083 Hydraulic Fluid, Petroleum Base, For Preservation and OperationMIL-H-6088 Heat Treatment of Aluminum AlloysMIL-S-6758 Steel, Chrome-Molybdenum (4130) Bars and Reforging Stock (Aircraft Quality)MIL-H-6875 Heat Treatment of Steels (Aerospace Practice, Process For)Copyright SAE Intern
16、ational Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE AS4843 - 3 -2.1.2 (Continued):MIL-A-8625 Anodic Coatings, for Aluminum and Aluminum AlloysMIL-H-46170 Hydraulic Fluid, Rust Inhibited, Fire Resistant Synthetic Hydrocarb
17、on BaseANA Bulletin No. 431 Air Force-Navy Aeronautical Bulletin Fittings, Flared, Classification of Defects ofFED-STD-595 Colors Used in Government ProcurementMIL-STD-105 Sampling Procedures and Tables for Inspection by AttributesMS20819 Sleeve, Flared Tube FittingMS24385 Fitting End, Flared Tube C
18、onnection, Precision Type, Standard DimensionsMS24386 Fitting End, Bulkhead Flared Tube Connection, Precision Type, Standard DimensionsMS33658 Fitting End, Hose Connection, Standard Dimensions for2.1.3 ANSI Publications: Available from ANSI, 11 West 42nd Street, New York, NY 10036-8002.ANSI/ASME B46
19、.1 Surface Texture (Surface Roughness, Waviness, and Lay)2.1.4 ASTM Publications: Available from ASTM, 1916 Race Street, Philadelphia, PA 19103-1187.ASTM A 108 Steel Bars, Carbon, Cold-finished, Standard QualityASTM A 370 Steel Products, Mechanical Testing ofASTM B 16 Specification for Free-Cutting
20、Brass Rod, Bar and Shapes for Use in Screw MachinesASTM B 138 Manganese Bronze Rod, Bar and ShapesASTM B 154 Copper and Copper Alloys, Mercurous Nitrate Test for3. TECHNICAL REQUIREMENTS:3.1 Material:Fittings shall be fabricated of materials listed in Table 1 or as specified on the applicable part s
21、tandard drawing.3.1.2 Heat Treatment:3.1.2.1 Aluminum Alloy: Aluminum alloy fittings and nuts shall be supplied in the final temper as shown in Table 1. When fitting material is purchased in other than the final temper, the heat treatment shall be in accordance with MIL-H-6088.Copyright SAE Internat
22、ional Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE AS4843 - 4 -TABLE 1 - MaterialsCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from
23、 IHS-,-SAE AS4843 - 5 -3.1.2.2 Steel: When additional processing is required to comply with the hardness requirements of 3.1.4, the heat treat shall be in accordance with MIL-H-6875.3.1.3 Internal Strain of Copper-base Alloys: Fittings fabricated from copper-base alloys shall have no internal strain
24、 as revealed by the test specified in 4.4.2. After testing, the parts shall be examined; any evidence of cracks indicates internal strain and is not acceptable.3.1.4 Additional Physical Properties: Unless otherwise specified on the applicable drawings, the hardness of the finished carbon steel parts
25、 with plating removed shall be 92 HRB to 31 HRC. For carbon steel fittings below a hardness of 20 HRC, hardness tests shall be made using the Rockwell B scale, in which case the hardness shall be within the range of 92 to 99 HRB.3.2 Design and Fabrication:The design and fabrication of the fittings s
26、hall be in accordance with the applicable drawings. The beaded ends of fittings shall be in accordance with MS33658. Dimensional requirements are applicable after heat treatment and protective finishing. The center body section of shape fittings machined from bar or oversized forgings shall conform
27、to AS1376.3.2.1 Shape and Form Restrictions: Abrupt reductions of section shall be avoided. Small external sections adjoining relatively heavy body sections shall be transition into the heavier sections by means of ample fillets.3.2.2 Passages:3.2.2.1 Drill Offset: On straight fittings where the flu
28、id passage is drilled from each end, the offset between the drilled holes at the meeting point of the drills shall not exceed .015 in. It shall be possible to pass through the fluid passage a ball whose diameter is .020 less than the minimum diameter specified for the passage. This does not mean tha
29、t the drilled passage may be smaller than that required by the detail drawings.3.2.2.2 Cross Section at Fluid Path Junction: On shape fittings, the cross-sectional area at the junction of fluid passages shall be such that it shall be possible to pass through the fitting from end to end, a ball whose
30、 diameter is not less than .7 times the minimum diameter specified for the smaller passage.3.3 Finish:3.3.1 Aluminum Alloy Fittings: Aluminum alloy fittings shall be anodized in accordance with MIL-A-8625, Type II, Class 2, dyed blue or brown as applicable (see 3.4.4) and shall be duplex sealed.Copy
31、right SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE AS4843 - 6 -3.3.2 Carbon Steel Fittings: Carbon steel fittings shall be cadmium plated in accordance with QQ-P-416, Type II, Class 2, dyed black (see 3.4
32、.4). All such carbon steel fittings shall be dipped in oil conforming to MIL-H-6083 or MIL-H-46170. Fluid passage holes, other openings, and internal threads shall not be subject to a plating thickness requirement and may exhibit bare areas provided that they are protected with a light film of oil.3
33、.3.3 Corrosion-Resistant Steel Fittings: Corrosion-resistant steel fittings shall be passivated per QQ-P-35, Type VI or VII.3.3.4 Copper-base Alloy Fittings: Plating of copper-base alloy fittings in accordance with QQ-P-416, Type II, Class 3 is optional.3.4 Identification of Product:All fittings sha
34、ll be marked in accordance with the following instructions. The marking shall be applied per AS478 as specified on the applicable drawing in a location not detrimental to the performance of the fitting and not detrimental to the corrosion protection of the fitting. When items cannot be physically ma
35、rked because of lack of space or because marking would have a deleterious effect, the package shall provide the identification per 5.4.3.4.1 Manufacturers Identification: Unless otherwise specified, all fittings shall be marked with the manufacturers name, CAGE code or trademark and the letters AN,
36、MS, AS, or NAS as applicable.3.4.2 Material Identification: Fittings shall be marked with the material code letter as shown in Table 1.3.4.3 Marking for Part Number and Size: A numerical size code equivalent to the nominal tube size code is optional. All fittings larger than 06 nominal tube size sha
37、ll be marked with the basic part number, exclusive of size. Fittings previously manufactured to AN standards that meet all other requirements of this document and the applicable part standards may retain their identification in addition to the previous requirements.3.4.4 Color Identification: In add
38、ition to the markings specified, the fittings shall be identified by the following colors:a. Aluminum alloys 2014 and 2024: Blue (see 3.3.1)b. Aluminum alloy 7075: Brown (see 3.3.1)c. Steel: Black (see 3.3.2)d. Copper-base alloys: Natural cadmium plate, if applicable (see 3.3.4)e. Corrosion-resistan
39、t steel: None3.5 Weight:The maximum weight of fittings shall not exceed the values specified on the applicable drawings.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE AS4843 - 7 -3.6 Workmanship:M
40、achined surfaces of fittings shall be as specified on the applicable drawings. Unmachined surfaces, such as forged surfaces and bar stock flats, shall be free from blisters, fins, folds, seams, laps, cracks, segregations, spongy areas, or other defects as specified in ARP4784. Surface defects may be
41、 explored by suitable etching and if they can be removed so that they do not appear on re-etching and the required section thickness can be maintained, they shall not be cause for rejection. The surface texture of unmachined surfaces, except forging parting lines, shall be 250 in Ra per ANSI/ASME B4
42、6.1. The surface texture of forging parting planes shall be 500 in Ra per ANSI/ASME B46.1.4. QUALITY ASSURANCE PROVISIONS:4.1 Responsibility for Inspection:Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection and test require
43、ments as specified herein. Except as otherwise specified, the supplier may utilize their own facilities or any commercial laboratory acceptable to the purchaser for the performance of the inspection and test requirement. The purchaser reserves the right to perform any of the inspections and tests se
44、t forth in this document, whenever such inspections and tests are deemed necessary to assure that supplies and services conform to prescribed requirements.4.2 Inspection Lot:A lot shall consist of all the fittings of a given part number, made from the same batch of material and processed at the same
45、 time.4.2.1 Material Certification: Records of the chemical composition analysis and mechanical property tests showing conformance to the material requirements of this document shall be available to the procuring activity upon request for each lot of fittings, except that chemical analysis tests are
46、 not required for aluminum alloys.4.3 Quality Conformance Inspection:4.3.1 Sampling:4.3.1.1 Sampling for Nondestructive Tests: Samples for heat treatment, finish, weight, dimensions, marking, surface defects, durability of finish, and workmanship shall be taken at random in accordance with MIL-STD-1
47、05, Inspection Level S-3 with an AQL of 4.0%, unless otherwise specified in ANA Bulletin No. 431. ANA Bulletin No. 431 will not be used for government purposes. Government acceptance will be based upon a sampling plan which accepts on zero defects.Copyright SAE International Provided by IHS under li
48、cense with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE AS4843 - 8 -4.3.1.2 Sampling for Destructive Tests: Sampling for hardness (4.4.1) and internal strain of copper-base alloys (4.4.2) shall be performed in accordance with MIL-STD-105, Inspection Level S
49、-3, with an AQL of 4.0%. Government acceptance will be based upon a sampling plan which accepts on zero defects.4.3.2 Examination and Inspection Methods: Each lot of fittings shall be examined and inspected as specified in Table 2.TABLE 2 - Quality Conformance Inspection4.3.2.1 Examination of Product: Each lot of fittings will be examined to determine conformance with this document and the applicable standard with respect to mater
