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 entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE 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 2015 SAE International All rights reserved. No part of this p
3、ublication 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: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS7225A AEROSPACE STANDARD AS7225 REV. A Issued 1992-10 Revised 2010-03Reaffirmed
5、 2015-04 Superseding AS7225 Rivets, Carbon Steel Procurement Specification for FSC 5320 RATIONALE AS7225A has been reaffirmed to comply with the SAE five-year review policy. WARNING This document includes cadmium as a plating material. The use of cadmium has been restricted and/or banned for use in
6、many countries due to environmental and health concerns. The user should consult with local officials on applicable health and environmental regulations regarding its use. 1. SCOPE 1.1 Type This procurement specification covers aircraft-quality solid rivets and tubular end rivets made from a carbon
7、steel of the type identified under the Unified Numbering System as UNS G10100. 1.2 Application Primarily for joining steel parts where a low shear strength is adequate and destruction of the fastener for repair or replacement is permissible. 1.3 Dimensions and Tolerances Unless otherwise specified h
8、erein, dimensions and tolerances are in inches. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this document 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
9、the date of the purchase order. In the event of conflict between the text of this document and references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2.1.1 SAE P
10、ublications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. 2.1.1.1 Aerospace Material Specifications AMS2259 Chemical Check Analysis Limits, Wrought Low-Alloy and Carbon Steels
11、 AMS2400 Plating, Cadmium 2.1.1.2 Aerospace Standards AS125101 Rivet - 100 Countersunk Head, Mild Steel AS125551 thru AS125700 Rivet - Universal Head, Mild Steel 2.1.2 U.S. Government Publications Available from the Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue,
12、 Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps.dla.mil/quicksearch/. 2.1.2.1 Military Specification MIL-STD-2073-1 Military Packaging, Standard Practice for 2.1.2.2 Air Force-Navy Aeronautical Standard 2.1.3 ASTM Publications Available from ASTM International, 100 Barr Harbor Dri
13、ve, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM E 18 Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials ASTM E 350 Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought Iron 2.2 Definitions DEFECTIVE:
14、A unit of product which contains one or more defects. PRODUCTION INSPECTION LOT: Shall be all finished parts of the same 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
15、at the same time. 2.3 Unit Symbols - degree, angular HRB - hardness, Rockwell B scale % - percent (1% = 1/100) 3. TECHNICAL REQUIREMENTS 3.1 Material The rivets shall be made from material conforming to the following: SAE INTERNATIONAL AS7225A 2 OF 73.1.1 Composition Shall conform to the percentages
16、 by weight specified in Table 1, determined by wet chemical methods in accordance with ASTM E 350 or by spectrochemical or other analytical methods acceptable to purchaser. TABLE 1 - MATERIAL COMPOSITION Element % by Weight min % by Weight max Carbon Manganese Phosphorus Sulfur 0.05 0.20 - - 0.15 0.
17、50 0.040 0.050 3.1.1.1 Check Analysis Composition variations shall meet the applicable requirements of AMS2259. 3.1.2 Condition Cold drawn wire or bar and annealed. 3.2 Design Unless otherwise specified on the part drawing, rivets furnished to this specification shall conform to the design, dimensio
18、ns, and other requirements specified on the applicable AS standard drawing as in 2.1.1.2 or the applicable AN standard drawing as in 2.1.2.2. 3.3 Fabrication Cold headed, unless purchaser permits machining, annealed, and descaled if necessary. 3.4 Runout of Head The circular runout of rivet head rel
19、ative to its shank shall be within the full indicator movement (FIM) specified in Table 2, unless otherwise specified on the part drawing. The measurement shall be taken with the indicator stylus touching the periphery of the protruding head, or the conical surface near the top of the flush head, as
20、 the rivet is rotated with its shank as an axis. TABLE 2 - CIRCULAR RUNOUT TOLERANCE Rivet Shank Nominal Diameter inch Rivet Head Runout Tolerance FIM, inch Flush Head Rivet Head Runout Tolerance FIM, inch Protruding Head 0.062 0.094 0.125 0.156 0.188 0.250 0.312 0.375 0.010 0.010 0.010 0.010 0.010
21、0.010 0.015 0.015 0.010 0.010 0.010 0.015 0.015 0.020 0.020 0.020 SAE INTERNATIONAL AS7225A 3 OF 73.5 Properties Rivets shall conform to the following requirements: 3.5.1 Hardness Shall be not higher than 60 HRB, determined in accordance with ASTM E 18 on a flat, smooth, filed or ground surface near
22、 the mid-length of the shank. 3.5.2 Formability Solid-shank rivets shall withstand being driven cold to form a crack-free upset head. The cold driven, upset head shall have a diameter of 1.25 to 1.66 times the nominal shank diameter and a height within the range shown in Table 3. Using a rivet havin
23、g a grip length of 1.5 times the nominal shank diameter, the cold driven rivet shall have an expansion of the shank to the full diameter of the hole in which it is installed, provided that the hole diameter is not more than 0.006 inch greater than the nominal shank diameter. TABLE 3 - RIVET DRIVEN H
24、EAD HEIGHT Rivet Shank Nominal Diameter inch Head Height Proportion of Nominal Diameter 0.062 and 0.094 0.125 and 0.156 0.188 and 0.250 0.312 and 0.375 0.33 to 1.0 0.33 to 0.8 0.33 to 0.8 0.33 to 0.7 3.5.3 Flarability Hollow-end rivets shall withstand being flared to a diameter of 1.5 times the nomi
25、nal shank diameter without bending the shank and without cracking in the flared end. 3.6 Plating Where AS7225 is specified, any protective treatment shall be as specified on the part drawing. Where AS7225-1 is specified, parts shall be cadmium plated in accordance with AMS2400. 3.7 Quality Rivets as
26、 received by purchaser, shall be sound, smooth, and free from foreign materials and from imperfections detrimental to usage of the parts. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of parts shall supply all samples for vendors test and shall be responsible for perfo
27、rming all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the parts conform to the requirements of this specification. 4.2 Responsibility for Compliance The manufacturers system for parts production shall be based on prev
28、enting product defects, rather than detecting the defects at final inspection and then requiring corrective action to be invoked. An effective manufacturing in-process control system shall be established, subject to the approval of the purchaser, and used during production of parts. SAE INTERNATIONA
29、L AS7225A 4 OF 74.3 Production Acceptance Tests The purpose of production acceptance tests is to check, as simply as possible, using a method which is inexpensive and representative of the part usage, with the uncertainty inherent in random sampling, that the parts comprising a production inspection
30、 lot satisfy the requirements of this specification. 4.4 Classification of Tests 4.4.1 Acceptance Tests Tests to determine conformance to requirements for material (3.1), design, dimensions and tolerances (3.2), runout of head (3.4), hardness (3.5.1), and plating (3.6) are classified as acceptance t
31、ests and shall be performed on each production inspection lot. A summary of acceptance tests is specified in Table 4. TABLE 4 - SUMMARY OF ACCEPTANCE TESTS TABLE 4A - NONDESTRUCTIVE TESTS Characteristic Req. Para. Sample Size Test Method Design & Dimensions Runout of Head Quality 3.2 3.4 3.7 Table 5
32、 Table 5 Table 5 Conventional measuring methods Conventional measuring methods Visual TABLE 4B - DESTRUCTIVE TESTS Characteristic Req. Para. Sample Size Test Method Material Composition Hardness Plating 3.1.1 3.5.1 3.6 4.5.1 4.5.3 4.5.4 ASTM E 350 ASTM E 18 Per AMS 2400 or microscopic measurement of
33、 sectioned specimens 4.4.2 Periodic Tests Tests to determine conformance to requirements for formability (3.5.2) and flarability (3.5.3) are classified as periodic tests and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by the purchaser. 4.5 Accept
34、ance Tests Sampling 4.5.1 Material One sample from bars or wire from each heat of alloy. 4.5.2 Nondestructive Tests - Visual and Dimensional A random sample shall be selected from each production inspection lot in accordance with Table 5. SAE INTERNATIONAL AS7225A 5 OF 7TABLE 5 - SAMPLING DATA NONDE
35、STRUCTIVE TESTS VISUAL AND DIMENSIONAL Production Inspection Lot Sample Size 2 to 15 16 to 50 51 to 150 151 to 500 501 to 3200 3201 to 35000 35001 to 500000 500001 and over 2 3 5 8 13 20 32 50 4.5.3 Hardness A random sample consisting of five rivets shall be selected from each production inspection
36、lot. 4.5.4 Plating A random sample consisting of five rivets shall be selected from each production inspection lot. 4.5.5 Acceptance Quality Of random samples tested, acceptance quality shall be based on zero defectives. 4.6 Periodic Tests Sampling As agreed upon by purchaser and vendor. 4.7 Reports
37、 The vendor of parts shall furnish with each shipment a report stating that the parts conform to the condition, chemical composition, and other technical requirements of this specification. This report shall include the purchase order number, AS7225, lot number, contractor or other direct supplier o
38、f material, part number, nominal size, and quantity. 4.8 Rejected Lots If a production inspection lot is rejected, the vendor of parts may perform corrective action to screen out or rework the defective parts, and resubmit for acceptance tests inspection as in Table 4. Resubmitted lots shall be clea
39、rly identified as reinspected lots. 5. PREPARATION FOR DELIVERY 5.1 Packaging and Identification 5.1.1 Parts having different part numbers shall be packed in separate containers. SAE INTERNATIONAL AS7225A 6 OF 75.1.2 Each container of parts shall be marked to show not less than the following informa
40、tion: a. RIVETS, CARBON STEEL b. AS7225 c. PART NUMBER d. LOT NUMBER e. PURCHASE ORDER NUMBER f. QUANTITY g. MANUFACTURERS IDENTIFICATION 5.1.3 Containers of parts shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaining
41、 to the handling, packaging, and transportation of the product to ensure carrier acceptance and safe delivery. 5.1.4 For direct U.S. Military procurement, packaging shall be in accordance with MIL-STD-2O73-1, industrial packaging, unless level A is specified in the request for procurement. 6. ACKNOW
42、LEDGMENT A vendor shall mention this specification number in all quotations and when acknowledging purchase orders. 7. REJECTIONS Parts not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 Direct U.S. Military Procurement Purch
43、ase documents should specify the following: a. Title, number, and date of this specification b. Part number of parts desired c. Quantity of parts desired d. Level A packaging, if required (see 5.1.4) 8.2 A change bar (|) located in the left margin is for the convenience of the user in locating areas
44、 where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY SAE COMMITTEE E-25, GENERAL STANDARDS FOR AEROSPACE & PROPULSION SYSTEMS SAE INTERNATIONAL AS7225A 7 OF 7
