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 2013 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.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/MA4070AEROSPACESTANDARDMA4070Issued 1988-04 Reaffirmed 2013-10 Pins, Procurement S
5、pecification For, Metric FSC 5315 RATIONALE MA4070 has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE AND FIELD OF APPLICATION:1.1 Type:This specification covers aircraft quality metric pins, such as, straight, headless, headed, shouldered, and dowel, in metric sizes.1.2 Ap
6、plication:Primarily for use in aerospace propulsion systems requiring metric size pins for use as locks, positioners, guides, plugs, and other similar uses.2. APPLICABLE DOCUMENTS:2.1 The following publications form a part of this specification to the extent specified herein. The latest issue of Aer
7、ospace Material Specification (AMS) and Metric Aerospace Standard (MA) shall apply. The applicable issue of other documents shall be as specified in AMS2350.2.2 SAE Publications:Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096.AMS2350 Standards and Test MethodsAMS2640 Magnetic Partic
8、le InspectionAMS2645 Fluorescent Penetrant InspectionMA4018 Pin, Straight, Headless, AMS5688, MetricMA4019 Pin, Straight, Headless, AMS5732, Metric2.3 ANSI Publication:Available from American National Standards Institute, 1430 Broadway, New York, NY 10018.ANSI/ASME B46.1 Surface Texture (Surface Rou
9、ghness, Waviness and Lay)2.4 U.S. Government Publications:Available from Commanding Officer, Naval Publications and Forms Center, 5801 Tabor Avenue, Philadelphia, PA 19120.2.4.1 Federal Specification:PPP-H-1581 Hardware Fasteners and Related Items, Packaging and Packing for Shipment and Storage of2.
10、4.2 Military Standards:MIL-STD-105 Sampling Procedures and Tables for Inspection by AttributesMIL-STD-1312 Fasteners, Test Methods3. TECHNICAL REQUIREMENTS:3.1 Material:Material shall be as specified on the part drawing.3.2 Dimensions:The dimensions and geometric tolerances of completed parts, after
11、 all processing including plating when required, shall conform to the requirements on the part drawing.3.3 Surface Texture:Surface texture of completed parts, prior to plating or coating when required, shall conform to the requirements on the drawing, determined in accordance with ANSI/ASME B46.1.3.
12、4 Hardness:When specified on the part drawing, the hardness shall be uniform and tested in accordance withMIL-STD-1312-6.SAE INTERNATIONAL MA4070 Page 2 of 10_ 3.5 Shear Strength:In lieu of hardness test as in 3.4, parts made from spring temper, cold drawn material shall withstand the minimum double
13、 shear load specified in Table I, tested in accordance with DOD-STD-1312-113.TABLE I - Double Shear Loads, Room TemperatureDouble shear load is based on two times area at nominal diameter times 625 MPa min shear strength divided by 1000 for load in kN.3.6 Plating or Coating:When required, plating or
14、 coating shall be as specified on the part drawing.3.7 Product Marking:Parts shall be identification marked as specified on the part drawing.3.8 Quality:Parts shall be uniform in quality and condition, clean, sound, smooth, and free from burrs and foreign material and external imperfections detrimen
15、tal to their performance.3.9 Non-Destructive Inspection:Parts shall be fluorescent penetrant inspected or magnetic particle inspected as specified on the part drawing. Parts shall show no indication of cracks, cold shuts, seams, machining tears, pipes, grinding checks, or nonmetallic inclusions.SAE
16、INTERNATIONAL MA4070 Page 3 of 10_ 3.9.1 Indications in pins shall not exceed the following limitations:3.9.1.1 There shall be no indications of discontinuities transverse to the grainflow (that is, at an angle of more than 10 deg to the longitudinal axis).3.9.1.2 Longitudinal indications of surface
17、 seams and forming laps parallel to grainflow are acceptable within the following limits, provided the separation between indications is not less than 1.6 mm in all directions.(a) Sides of Head: A maximum of three surface discontinuities per head is permitted and the length of each indication may be
18、 full height of the surface. No indication shall extend over either edge to a depth greater then 0.8 mm.(b) Top of Head and End of Stem: A maximum of three surface discontinuities in each area is permitted provided the length or diameter of any individual indication does not exceed 1.2 mm.(c) Shank
19、or Stem: A maximum of five indications is permitted. The length of any one indication may be the full length of the surface but the total length of all indications shall not exceed twice the length of the surface. No indication shall extend into a fillet or over an edge.4. QUALITY ASSURANCE PROVISIO
20、NS:4.1 Responsibility for Inspection:The vendor of parts shall supply all samples and shall be responsible for performing all required tests. Results of such tests shall be reported to the purchaser as required by 4.4. Purchaser reserves the right to perform such confirmatory testing deemed necessar
21、y to ensure that the parts conform to the requirements of this specification.4.2 Classification of Tests:The inspection and testing of parts are classified as acceptance tests as in 4.3.1, which are to be performed on each production inspection lot.4.3 Production Inspection Lot:A production inspecti
22、on 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 specified condition, produced as one continuous run, and submitted for vendors inspection at the same time.4.3.1 Acceptance Tests: The acceptance tests shall be performe
23、d on each production inspection lot. The acceptance tests consist of all the tests specified in Table II.SAE INTERNATIONAL MA4070 Page 4 of 10_ TABLE II - Summary of Acceptance TestsSAE INTERNATIONAL MA4070 Page 5 of 10_ 4.3.2 Acceptance Test Sampling:4.3.2.1 Non-Destructive Test - Visual and Dimens
24、ional: A random sample shall be selected from each production inspection lot; the size of the sample shall be as specified in Table III. The classification of defects for parts shall be as specified in Table IV. Defects not classified in Table IV shall be classified as Minor B defects. All dimension
25、al characteristics are considered defective when out of tolerance.TABLE III - Sampling DataVisual and Dimensional CharacteristicsSample Size, Acceptance Number (Ac) and Rejection Number (Re) forAQL 1.0% and 4.0%Sample sizes listed above are based on single sampling plans for normal inspection perMIL
26、-STD-105. It is permissible to use other sampling plans per MIL-STD-105 which provide the same quality protection. When sample size equals or exceeds the lot size, 100% inspection is required.SAE INTERNATIONAL MA4070 Page 6 of 10_ TABLE IV - Classification of Defects4.3.2.2 Non-Destructive Inspectio
27、n: Parts shall be fluorescent penetrant inspected in accordance with AMS2645 or magnetic particle inspected in accordance with AMS2640 as specified on the part drawing, and shall meet the requirements in 3.9 through 3.9.1.2.4.3.2.3 Hardness Test (See 3.4): A random sample shall be selected from each
28、 production inspection lot; the size of the sample shall be as specified in Table V, column A. The sample units may be selected from those that have been subjected to and passed the visual and dimensional inspection, with additional units selected at random from the production inspection lot as nece
29、ssary.SAE INTERNATIONAL MA4070 Page 7 of 10_ TABLE V - Mechanical and Metallurgical CharacteristicsSample Size (n) and Acceptance Number (AC)4.3.2.4 Destructive Tests: A random sample shall be selected from each production inspection lot; the size of the sample shall be as specified in Table V, colu
30、mn B. The sample units may be selected from those that have been subjected to and passed the non-destructive tests with additional units selected at random from the production inspection lot as necessary.4.3.3 Shear Test Specimens (See 3.5): Where the finished part is not suitable for shear testing
31、as specified in 3.5, specimens may be taken from the material of the same lot of alloy and processed together with the parts they represent.4.3.4 Acceptance Quality: The acceptance quality level and acceptance number of defectives for the acceptance tests shall be as specified in Tables III and V.4.
32、4 Reports:The vendor of parts shall furnish with each shipment a report stating that the chemical composition of the parts conforms to the applicable material specification, showing the results of tests to determine conformance to the room temperature shear property and hardness when specified, and
33、stating that the parts conform to the other technical requirements of this specification. This report shall include the purchase order number, this specification number, contractor or other direct supplier of material, part number, nominal size, and quantity.SAE INTERNATIONAL MA4070 Page 8 of 10_ 4.
34、5 Resampling and Retesting:If any part or specimen used in the above tests fails to meet the specified requirements for mechanical properties and quality as in 3.4, 3.5 and 3.8, disposition of the parts may be based on the results of testing three additional parts or specimens for each original nonc
35、onforming part or specimen. Failure of any retest part or specimen to meet the specified requirements shall be cause for rejection of the parts represented and no additional testing shall be permitted. Results of all tests shall be reported.5. PREPARATION FOR DELIVERY:5.1 Packaging and Identificatio
36、n: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:METRIC PINSMA 4070PART NUMBER _PURCHASE ORDER NUMBER _QUANTITY _MANUFACTURERS IDENTIFICATION _5.1.3 Containers of parts shall be prepared
37、 for shipment in accordance with commercial practice to ensure carrier acceptance and safe transportation to the point of delivery. Packaging shall conform to carrier rules and regulations applicable to the mode of transportation.5.1.4 For direct U.S.A. Military procurement, packaging shall be in ac
38、cordance with PPP-H-1581.6. ACKNOWLEDGMENT:6.1 A vendor shall mention this specification number in all quotations and when acknowledging purchase orders.7. REJECTIONS:7.1 Parts not conforming to this specification or to authorized modifications will be subject to rejection.SAE INTERNATIONAL MA4070 P
39、age 9 of 10_ 8. NOTES:8.1 For direct U.S.A. Military procurement, purchase documents should specify not less than the following:Title, number, and date of this specification and applicable metric part standard (MA4018 or MA4019).Part number of parts desired.Quantity of parts desired.Level (degree) of protection in accordance with PPP-H-1581 ordering data.PREPARED BY SAE COMMITTEE E-25,GENERAL STANDARDS FOR AEROSPACE PROPULSION SYSTEMSSAE INTERNATIONAL MA4070 Page 10 of 10_
