1、AEROSPACE STANDARDAS7220Issued 1991-10Reaffirmed 2006-05Superseding AMS 7220CAluminum Rivets, UNS A91100,99Al (1100-H14)FSC 53201. SCOPE:1.1 Type:This procurement specification covers rivets fabricated from an aluminum alloy designated as 1100-H14, strain hardened.1.2 Application:Primarily for joini
2、ng aluminum parts where a low shear strength is adequate.2. REFERENCES:2.1 Applicable Documents:The following publications form a part of this specification to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other documents shall be the issue in
3、 effect on the date of the purchase order.2.1.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.2.1.1.1 Aerospace Material Specification:AMS 2355 Quality Assurance Sampling and Testing of Aluminum Alloys and Magnesium Alloys, Wrought Products (Except Forging S
4、tock) and Flash Welded RingsSAE 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 entirely voluntary, and its applicability and suitability for any particular use, including any patent
5、infringement arising therefrom, 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 2006 SAE International All rights reserved. No
6、part of this publication may be reproduced, stored in 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:
7、724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org RATIONALE This document has been reaffirmed to comply with the SAE 5-year Review policy. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or ne
8、tworking permitted without license from IHS-,-,-SAE AS7220 - 2 -2.1.2 U.S. Government Publications: Available from Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.2.1.2.1 Military StandardsMIL-STD-105 Sampling Procedures and Tables for Inspection by
9、 AttributesMIL-STD-1312 Fasteners, Test MethodsMIL-STD-2073-1 DOD Materiel, Procedures for Development and Application of Packaging Requirements2.1.3 ASTM Publication: Available from ASTM, 1916 Race Street, Philadelphia, PA 19103-1187.ASTM B 565 Shear Testing of Aluminum and Aluminum-Alloy Rivets an
10、d Cold-Heading Wire and Rods2.1.4 ANSI Publication: Available from American National Standards Institute, Inc., 11 West 42nd Street, New York, NY 10036.ANSI Y14.5M Dimension and Tolerancing2.2 Definitions:PRODUCTION INSPECTION LOT: A production inspection lot shall be all finished parts of the same
11、part number, made from a single heat of alloy, heat treated at the same time to the same specified condition, produced as one continuous run, and submitted for vendors inspection at the same time.3. TECHNICAL REQUIREMENTS:3.1 Material:The rivets shall be made from material conforming to the followin
12、g:Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS7220 - 3 -3.1.1 Composition: Shall conform to the following percentages by weight, determined in accordance with AMS 2355 (see Table 1).3.1.2 H
13、eading Stock: Shall be wire or rod in the half hard temper.3.2 Design:Rivet design shall be as specified on the applicable drawing.3.3 Properties:Rivets shall conform to the following requirements:3.3.1 Shear Strength: The undriven strength of rivets greater than 0.094 inch in nominal diameter shall
14、 be not less than 10 200 psi in single shear or not less than 20 400 psi in double shear at room temperature and shall be tested as specified in 4.5.2.1, unless shear strength is otherwise specified on the part drawing.3.3.1.1 For rivets 0.094 inch in nominal diameter or smaller or for nonstandard d
15、iameters for which a shear test fixture is not available, tensile test shall be made as specified in 4.5.2.2. The wire or rod samples shall be taken from the same material lot that the rivets are made. Room temperature tensile strength shall be not less than 16 000 psi, unless otherwise specified on
16、 the part drawing.TABLE 1 - Composition, Percentages by WeightAluminum 99.0 minIron + Silicon 0.95 maxCopper 0.05 - 0.20Zinc 0.10 maxManganese 0.05 maxOther Impurities, each 0.05 maxOther Impurities, total 0.15 maxCopyright SAE International Provided by IHS under license with SAENot for ResaleNo rep
17、roduction or networking permitted without license from IHS-,-,-SAE AS7220 - 4 -3.4 Circular Runout of Head:The circular runout (see ANSI Y14.5M) of rivet head relative to the shank, from a maximum shank length equal to two nominal shank diameters from the head, shall not vary by an amount which will
18、 produce a full indicator movement (FIM) greater than the value specified in Table 2 for the corresponding rivet diameter, unless otherwise specified on the part drawing. The indicator reading shall be taken with the indicator stylus touching the periphery of the head as the rivet is rotated with th
19、e shank as an axis.3.5 Identification:Rivets conforming to this specification shall be identified by a plain head, free from depressions or raised teats, for material identification.3.6 Quality:Rivets shall be uniform in quality and condition, free from seams, fins, clinch or die marks, cracks, cold
20、 shuts, and other injurious defects. Rivets shall drive satisfactorily with full heads and, after driving, shall show no cracks when visually inspected.TABLE 2 - Rivet Head Circular Runout ToleranceNominal Diameter ofRivet Shankinch Rivet Head CircularRunout Tolerance, FIMFlush HeadinchRivet Head Ci
21、rcularRunout Tolerance, FIMProtruding Headinch0.062 0.010 0.0100.094 0.010 0.0100.125 0.010 0.0100.156 0.010 0.0150.188 0.010 0.0150.250 0.010 0.0200.312 0.015 0.0200.375 0.015 0.020Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitte
22、d without license from IHS-,-,-SAE AS7220 - 5 -4. QUALITY ASSURANCE PROVISIONS:4.1 Responsibility for Inspection:The vendor of parts shall supply all samples and shall be responsible for performing all required tests. Purchaser reserves the right to perform such confirmatory testing as deemed necess
23、ary to ensure that the parts conform to the requirements of this specification.4.2 Classification of Tests:Tests to determine conformance to all technical requirements of this specification are classified as acceptance tests and shall be performed on each production inspection lot.4.3 Acceptance Tes
24、t Sampling:4.3.1 Sampling for Material Acceptance: Sampling, inspection, and testing of the wire or rod from which the rivets are manufactured shall be in accordance with AMS 2355.4.3.2 Sampling for Finished Product Acceptance:4.3.2.1 Sampling for Visual and Dimensional Examination: A random sample
25、shall be selected from each production inspection lot in accordance with MIL-STD-105, inspection level II, acceptance quality level (AQL) 4% defective. All dimensional characteristics are considered defective when out of tolerance.4.3.2.2 Sampling for Tests: Lot size shall be defined in terms of pou
26、nds, and sampling size shall be defined in terms of number of rivets. For production inspection lots of 1300 lb and less, a random sample shall be selected in accordance with MIL-STD-105, inspection level S-2, acceptance quality level (AQL) of 4% defective. For production inspection lots over 1300 l
27、b, 10 rivets shall be selected from each production inspection lot. The AQL shall be 2.5% defective.4.4 Preparation of Specimens:4.4.1 Shear Strength Specimens: Rivet samples with a shank length 2.5 times the nominal shank diameter and greater shall be double or single shear tested as specified in 4
28、.5.2.1. Rivet samples with a shank length less than 2.5 times the nominal shank diameter shall be single shear tested.4.4.2 Tension Test Specimens: Tension test specimens shall be not less than 18 inches long, or three specimens not less than 6 inches long. The specimens shall be taken from the wire
29、 or rod used to make the rivets.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS7220 - 6 -4.5 Inspection Methods:4.5.1 Examinations:4.5.1.1 Visual Inspection: The rivets shall be visually inspe
30、cted to determine conformance to 3.6.4.5.1.2 Dimensional Inspection: Conformance to the dimensions on the part drawing and the requirements of 3.4, when applicable, shall be performed with conventional measuring methods.4.5.2 Tests:4.5.2.1 Shear Strength: The double shear strength tests shall be in
31、accordance with MIL-STD-1312-13 or ASTM B 565. The single shear test method shall be in accordance with MIL-STD-1312-20.4.5.2.2 Material Tensile Strength: The tensile strength test method shall be in accordance with AMS 2355.4.5.2.3 Driveability: Using a proper driver, the rivet shall be driven in a
32、 sheet specimen of suitable thickness. The bucked rivet head shall be inspected for conformance to 3.6.4.6 Inspection of Packaging:The sampling and inspection of the preservation, packing, and marking shall be examined and tested in accordance with MIL-STD-2073-1 to determine conformance to Section
33、5.4.7 Reports:The vendor of parts shall furnish with each shipment a copy of a report stating that the chemical composition of the parts conforms to this specification, showing the results of tests to determine conformance to the shear strength or, when applicable, tensile strength, and stating that
34、 the parts conform to the other technical requirements of this specification. This report shall include the purchase order number, lot number, AS7220, contractor or other direct supplier of material, part number, nominal size, and quantity.4.8 Resampling and Retesting:If any part or specimen used in
35、 the tests fails to meet the specified requirements for mechanical properties and quality as in 3.3 and 3.6, disposition of parts may be based on the results of testing three additional parts or specimens for each original nonconforming part or specimen. Failure of any retest part or specimen to mee
36、t the specified requirement shall be cause for rejection of the parts represented and no additional testing shall be permitted. Results of all tests shall be reported.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without licen
37、se from IHS-,-,-SAE AS7220 - 7 -5. PREPARATION FOR DELIVERY:5.1 Packaging and Identification:5.1.1 Parts having different part numbers shall be packed in separate containers.5.1.2 Each container of parts shall be marked to show the following information:RIVETS, ALUMINUMAS7220PART NUMBERPURCHASE ORDE
38、R NUMBERQUANTITYMANUFACTURERS IDENTIFICATIONLOT NUMBER5.1.3 Containers of parts shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the product to ensure carrier acc
39、eptance and safe delivery.5.1.4 For direct U.S. Military procurement, packaging shall be in accordance with MIL-STD-2073-1, industrial packaging, unless Level A is specified in the request for procurement.6. ACKNOWLEDGMENT:A vendor shall mention AS7220 in all quotations and when acknowledging purcha
40、se orders.7. REJECTIONS:Parts not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection.8. NOTES:8.1 For direct U.S. Military procurement, purchase documents should specify the following:Title, number, and date of this specification.Part number o
41、f parts desired.Quantity of parts desired.Applicable level of packaging (see 5.1.4).Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS7220 - 8 -8.2 Key Words:Rivets, Procurement SpecificationPREPARED BY SAE COMMITTEE E-25,GENERAL STANDARDS FOR AEROSPACE PROPULSION SYSTEMSCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
