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 ther
2、efrom, 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 2017 SAE International All rights reserved. No part of this
3、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: +1 724-776-49
4、70 (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:/standards.sae.org/AMS4612K AEROSPACE MATERIAL SPECIFICATION AMS4612 REV. K Issued 1941-09 Revised 2017-11 Supers
5、eding AMS4612J Brass, Naval, Bars and Rods 60.5Cu - 38.5Zn - 0.75Sn Hard Temper (H04) (Composition similar to UNS C46400) RATIONALE AMS4612K revises Composition (Table 1), Reports (4.4), and Identification (5.1.1), and is a Five-Year Review and update of this specification. 1. SCOPE 1.1 Form This sp
6、ecification covers a copper alloy (naval brass) in the form of bars and rods. 1.2 Application These products have been used typically for automatic screw machine parts, but usage is not limited to such applications. This material has slightly higher strength and lower ductility than AMS4611. It also
7、 has better corrosion resistance than AMS4610 but is less readily machinable. 2. APPLICABLE DOCUMENTS The issue of the 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
8、a document unless a specific document issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale,
9、PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2221 Tolerances, Copper and Copper Alloy Bars and Rods AMS4610 Brass, Free-Cutting Bars and Rods, 61.5Cu - 35Zn - 3.1Pb, Half Hard (H02) AMS4611 Brass, Naval, Bars and Rods, 60.5Cu - 38.7Zn - 0
10、.8Sn, Half Hard (H02) ARP1917 Clarification of Terms Used in Aerospace Metals Specifications SAE INTERNATIONAL AMS4612K Page 2 of 5 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM B
11、154 Mercurous Nitrate Test for Copper Alloys ASTM B249/B249M General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings ASTM B601 Classification for Temper Designations for Copper and Copper Alloys Wrought and Cast ASTM B858 Ammonia Vapor Test for Determining Susceptibili
12、ty to Stress Corrosion Cracking in Copper Alloys ASTM E8/E8M Tension Testing of Metallic Materials ASTM E18 Rockwell Hardness of Metallic Materials ASTM E478 Chemical Analysis of Copper Alloys 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1, dete
13、rmined by wet chemical methods in accordance with ASTM E478, by spectrochemical methods, or by other analytical methods acceptable to purchaser. Table 1 - Composition Element (3.1.1) Min Max Copper 59.0 62.0 Tin 0.50 1.0 Lead - 0.20 Iron - 0.10 Zinc (3.1.2) remainder - Sum of Named Elements (3.1.3)
14、99.6 - 3.1.1 These composition limits do not preclude the presence of other elements. Limits may be established and analysis required for unnamed elements by agreement between the manufacturer or supplier and purchaser. 3.1.2 Zinc may be reported as “remainder”, as the difference between the sum of
15、results for all elements and 100%, or as the result of direct analysis. 3.1.3 When all named elements in Table 1 are analyzed, the sum shall be 99.6% minimum, but such determination is not required for routine acceptance of each lot. 3.2 Condition Cold finished, hard (H04) temper (see 8.3). 3.3 Prop
16、erties The product shall conform to the following requirements: 3.3.1 Tensile Properties Shall be as shown in Table 2, determined in accordance with ASTM E8/E8ME8M. SAE INTERNATIONAL AMS4612K Page 3 of 5 Table 2 Table 2A - Minimum tensile properties, inch/pound units Nominal Diameter or Distance Bet
17、ween Parallel Sides Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D % Up to 1.000, incl 67.0 45.0 13 Over 1.000 to 2.500, incl 62.0 37.0 18 Over 2.500 to 3.500, incl 54.0 25.0 27 Over 3.500 54.0 22.0 30 Table 2B - Minimum tensile properties, SI units Nomina
18、l Diameter or Distance Between Parallel Sides Millimeters Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 50.8 mm or 4D % Up to 25.40, incl 462 310 13 Over 25.40 to 63.50, incl 427 255 18 Over 63.50 to 88.90, incl 372 172 27 Over 88.90 372 152 30 3.3.2 Embrittlement Specimens as
19、 in 4.3.2 shall withstand, without cracking, the mercurous nitrate test performed in accordance with ASTM B154, Procedure A, or the Ammonia Vapor Test in accordance with ASTM B858. 3.4 Quality The product, as received by purchaser, shall be uniform in quality and condition, sound, and free from fore
20、ign materials and from imperfections detrimental to usage of the product. 3.5 Tolerances Shall conform to AMS2221 as applicable to nonrefractory alloys. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The producer of the product shall supply all samples for producers tests and shal
21、l 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 requirements. 4.2 Classification of Tests All technical requirements are acceptance tests and s
22、hall be performed on each lot. 4.3 Sampling and Testing Shall be in accordance with ASTM B249/B249M and the following: 4.3.1 The axis of tensile specimens shall be parallel to grain flow. For product 1.500 inches (38.10 mm) and under in nominal diameter or distance between parallel sides, the axis o
23、f specimens shall be located at the center of the product; for product over 1.500 inches (38.10 mm) in nominal diameter or distance between parallel sides, the axis of specimens shall be located midway between surface and center. SAE INTERNATIONAL AMS4612K Page 4 of 5 4.3.2 Embrittlement One sample
24、from each lot, unless otherwise agreed upon by purchaser and producer. Specimens for embrittlement test shall be full cross-section of the product and shall have length of approximately 6 inches (152 mm) or twice the diameter or least distance between parallel sides, whichever is greater. 4.4 Report
25、s The producer of the product shall furnish with each shipment a report showing the results of tests for chemical composition, tensile properties, and embrittlement and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, lot num
26、ber, AMS4612K, size, and quantity. 4.4.1 When material produced to this specification is beyond the sizes allowed in the scope of tables, or other exceptions are taken to the technical requirements listed in Section 3 (see 5.1.1), the report shall contain a statement “This material is certified as A
27、MS4612K(EXC) because of the following exceptions.” and the specific exceptions shall be listed. 4.5 Resampling and Retesting If any specimen used in the above tests fails to meet specified requirements, disposition of the product may be based on the results of testing two additional specimens for ea
28、ch original nonconforming specimen. Failure of any retest specimen to meet specified requirements shall be cause for rejection of the product represented. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Identification Individual pieces or bundles shall have attached a durable
29、 tag legibly marked with not less than the purchase order number, lot number, AMS4612K, and nominal size or shall be boxed and the box marked with the same information. 5.1.1 When technical exceptions are taken, the material shall be marked with AMS4612K(EXC) (see 4.4.2), 5.2 Packaging The product s
30、hall 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 delivery. 6. ACKNOWLEDGMENT A producer shall mention this specif
31、ication number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Product not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 Revision Indicator A change bar (I) located in the left
32、 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 revision of the document, including technical revisions. Change b
33、ars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 Hardness should be as shown in Table 3, determined in accordance with ASTM E18. SAE INTERNATIONAL AMS4612K Page 5 of 5 Table 3 - Hardness Nominal Diameter or Distance Between Parallel Sides I
34、nches Nominal Diameter or Distance Between Parallel Sides Millimeters Rounds HRB Hexagons Octagons HRB Up to 1.000, incl Up to 25.40, incl 75 to 95 70 to 90 Over 1.000 to 2.500, incl Over 25.40 to 63.50, incl 70 to 90 65 to 85 Over 2.500 Over 63.50 70 to 90 60 to 80 Hardness has been used to verify
35、that product is properly processed, but an “out-of-range” hardness number is not always indicative of product with “out-of-specification” tensile strength. Further analysis including material composition verification, heat treat process parameter review, and/or tensile property measurement on produc
36、t with “out-of-range” hardness may be necessary. 8.3 Copper temper designations are defined in ASTM B601. 8.4 Terms used in AMS are clarified in ARP1917. 8.5 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsi
37、us temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.6 Purchase documents should specify not less than the following: AMS4612K Form and size of product desired Quantity of product desired. 8.7 Similar Specifications ASTM B21, C46400, hard temper, is listed for information only and shall not be construed as an acceptable alternate unless all requirements of this AMS are met. PREPARED BY AMS COMMITTEE “D”
