1、AEROSPACE MATERIAL SPECIFICATION AMS3042 REV. E Issued 1974-03 Revised 2008-12 Reaffirmed 2014-08 Superseding AMS3042D Magnetic Particles, Nonfluorescent Wet Method, Dry Powder RATIONALE AMS3042E has been reaffirmed to comply with the SAE five year review policy. _ SAE Technical Standards Board Rule
2、s 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 therefrom, is the sole responsibility of
3、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 2014 SAE International All rights reserved. No part of this publication may be reproduced, stored
4、 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: +1 724-776-4970 (outside USA) Fax: 724-776-0790 Em
5、ail: 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/AMS3042E 1. SCOPE 1.1 Form This specification covers nonfluorescent, magnetic particles in the form of dry powders in
6、tended to be suspended in oil or conditioned water vehicle for use in the wet method, magnetic particle inspection. 1.2 Application These particles have been used typically as the inspection medium in a wet magnetic particle inspection system in accordance with ASTM E 1444, using either an oil or a
7、conditioned water vehicle, but usage is not limited to such application. 1.3 Safety - Hazardous Materials 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 hazard
8、s which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with 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 issue of th
9、e following documents in effect on the date of the purchase order forms a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been cancelled and no supe
10、rseding document has been specified, the last published issue of that document shall apply. SAE INTERNATIONAL AMS3042E Page 2 of 6 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-49790 (out
11、side USA), www.sae.org. AMS2641 Vehicle, Magnetic Particle Inspection, Petroleum Base AS4792 Water Conditioning Agents for Aqueous Magnetic Particle Inspection AS5282 Tool Steel Ring for Magnetic Particle Inspection 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O.
12、 Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D 1966 Test Method for Foots in Raw Linseed Oil ASTM E 11 Wire-Cloth Sieves for Testing Purposes ASTM E 1444 Magnetic Particle Examination 3. TECHNICAL REQUIREMENTS 3.1 Material The product shall be composed of durabl
13、e magnetic particles, suitable for long-time use, which may have been treated to attain the color specified. This dry powder is designed for use with an aqueous vehicle conditioned in accordance with AS4792 or an odorless inspection oil conforming to AMS2641, or equivalent, and shall disperse evenly
14、 and thoroughly in the recommended vehicle. 3.2 Test Suspension The test suspension for determining conformance to requirements of 3.3 shall be prepared by adding sufficient dry powder solids to conditioned water or odorless inspection oil, to produce a suspension concentration of 1.0 to 2.4 mL of m
15、agnetic particles in 100 mL of suspension. The concentration shall be verified by mixing the suspension thoroughly, filling a 100-mL calibrated centrifuge tube as specified in ASTM D 1966, allowing the tube to stand undisturbed for at least 60 minutes, and reading, on the calibrated tube, the volume
16、 of the particles settled from the suspension. 3.3 Properties The product shall conform to the following requirements; tests shall be performed on the product supplied and in accordance with specified test procedures, using a test suspension prepared in accordance with 3.2: 3.3.1 Contamination The p
17、roduct shall show no evidence of foreign material, agglomeration, or scum, determined by visual examination of the test suspension at the following times: 3.3.1.1 During preparation of the test suspension as in 3.2. 3.3.1.2 After mixing the test suspension, allowing it to stand for not less than 30
18、minutes, and agitating it slightly. 3.3.1.3 During the tests to determine other characteristics of the product. SAE INTERNATIONAL AMS3042E Page 3 of 6 3.3.2 Color The color of the magnetic particles in suspension shall be black, red, gray, or as otherwise specified by purchaser, determined by observ
19、ing a well-dispersed sample of the test suspension in a glass container under a white light of not less than 100 foot-candles (1000 lx) at the examining surface. 3.3.3 Particle Size The magnetic particles shall be of such size that not less than 98% by weight shall pass through a 3-inch (76-mm) diam
20、eter U.S. Standard No. 325 (45 m) sieve, as defined in ASTM E 11, determined by passing a 1-quart (1-L) sample of stirred test suspension through the sieve. After the test suspension liquid carrier has completely passed through the sieve, rinse with 1 quart (1 L) of the original liquid carrier. Dry
21、the sieve to remove all of the liquid and determine the dry weight of the residual particulate material not passing through the sieve as related to the original weight of the particulate material in the sample, reported in percent. 3.3.4 Sensitivity The product shall provide indications of at least
22、the first six holes of the test ring specimen of 4.4 when tested as follows: 3.3.4.1 Place the ring on a 1-inch (25-mm) diameter copper bar and circularly magnetize in a standard magnetic particle inspection unit by passing 2500 amperes of direct current through the bar immediately before flushing t
23、he ring with the agitated test suspension that has passed the concentration and contamination tests. Examine the ring under a white light of not less than 100 foot-candles (1000 lx) at the examining surface. 3.3.5 Mechanical Durability Magnetic particles shall retain their initial sensitivity, color
24、, and brightness of indication after placing not less than 400 mL of thoroughly mixed suspension, prepared as in 3.2, in a 1-quart (1-L) capacity constant speed blender, operating the blender at approximately 10,000 to 12,000 rpm for a total of 10 minutes in 2-minute intervals, allowing the suspensi
25、on to cool for 5 minutes during each period between stirring cycles and, at the end of the cumulative 10 minutes blending, conducting the sensitivity (3.3.4) tests. 3.3.6 Chemical Durability Magnetic particles shall retain their initial color (3.3.2) and sensitivity (3.3.4) after allowing a 1.5-quar
26、t (1.4-L) volume of freshly prepared, thoroughly mixed suspension to stand undisturbed at room temperature for not less than 14 days. After standing, the suspension shall be stirred and shall meet the requirements of 3.3.2 and 3.3.4. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection
27、The manufacturer of the product shall supply all samples for manufacturers tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to specified requir
28、ements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Contamination (3.3.1), color (3.3.2), particle size (3.3.3), and sensitivity (3.3.4) are acceptance tests and shall be performed on each lot. SAE INTERNATIONAL AMS3042E Page 4 of 6 4.2.2 Periodic Tests Mechanical durability (3.3.5) and chemi
29、cal durability (3.3.6) are periodic tests and shall be performed at a frequency selected by the manufacturer unless frequency of testing is specified by purchaser. 4.2.3 Preproduction Tests All technical requirements are preproduction tests and shall be performed prior to or on the initial shipment
30、of a product to a purchaser, when a change in ingredients and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.3 Sampling and Testing Shall be as follows: 4.3.1 For Acceptance Tests Sufficient product shall be taken at random from each lo
31、t to perform all required tests. The number of determinations for each requirement shall be as specified in the applicable test procedures or, if not specified, not less than three. 4.3.1.1 A lot shall be all product produced in a single production run from the same batch of raw materials under the
32、same fixed conditions and presented for inspection at one time. 4.3.2 For Periodic and Preproduction Tests As agreed upon by purchaser and manufacturer. 4.4 Tool Steel Test Ring Shall be in accordance with AS5282. 4.5 Approval 4.5.1 Sample product shall be approved by purchaser before product for pr
33、oduction use is supplied, unless such approval be waived by purchaser. Results of tests on production product shall be equivalent to those on the approved sample. 4.5.2 Manufacturer shall use ingredients, manufacturing procedures, processes, and methods of inspection on production product that are t
34、he same as those used on the approved sample. If necessary to make any changes in ingredients, processing techniques, or manufacturing procedures, manufacturer shall submit for reapproval a statement of the proposed changes in ingredients and/or processing and, when requested, sample product. Produc
35、tion product shall not be shipped prior to receipt of reapproval. 4.6 Reports The vendor of the product shall furnish with each shipment a report stating that the product conforms to all technical requirements. This report shall include the purchase order number, lot number, AMS3042E, manufacturers
36、material designation, date of manufacture, and quantity. 4.7 Resampling and Retesting If any sample used in the above tests fails to meet specified requirements, disposition of the product may be based on the results of testing three additional samples for each original nonconforming sample. Failure
37、 of any retest sample to meet specified requirements shall be cause for rejection of the product represented. Results of all tests shall be reported. SAE INTERNATIONAL AMS3042E Page 5 of 6 5. PREPARATION FOR DELIVERY 5.1 Packaging and Identification 5.1.1 Dry magnetic particles shall be packaged in
38、containers of a type and size agreed upon by purchaser and vendor. 5.1.2 A lot of particles may be packaged in small quantities and delivered under the basic lot approval provided lot identification is maintained. 5.1.3 Each container shall be identified, with a durable label that is legible on rece
39、ipt, with not less than the following information: MAGNETIC PARTICLES, NONFLUORESCENT, WET METHOD, DRY POWDER AMS3042E COLOR _ MANUFACTURERS IDENTIFICATION_ DATE OF MANUFACTURE _ * _ LOT NUMBER _ QUANTITY _ MANUFACTURERS INSTRUCTIONS FOR USE _ * _ APPROPRIATE WARNINGS OR PRECAUTIONARY NOTICES _ * Ma
40、y be included in manufacturers identification or lot number. * May be on a separate sheet. 5.1.4 Individual packages or containers shall be packed in an exterior shipping container capable of protecting the product, during shipment and storage, against damage from exposure to moisture, weather, or a
41、ny other normal hazard. 5.1.5 Containers of the product 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 acceptance and safe deliver
42、y. 6. ACKNOWLEDGMENT A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders to this specification. 7. REJECTIONS Product not conforming to this specification, or to modifications authorized by purchaser, will be subject to re
43、jection. 8. NOTES 8.1 A change bar ( l ) located in the left margin is for the convenience of the user in locating areas 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 revis
44、ion of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 Terms used in AMS are clarified in ARP1917. SAE INTERNATIONAL AMS3042E Page 6 of 6 8.3 Dimensions and properties in inch/pound unit
45、s and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.4 Purchase orders should specify not less than the following: AMS3042E Size and type of containers desired Quantity of product desired. PREPARED BY AMS COMMITTEE “K”
