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 isentirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, 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 InternationalAll rights reserved. No part of this public
3、ation 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: +1 724-776-4970 (outs
4、ide USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS4855GAEROSPACEMATERIAL SPECIFICATIONAMS4855 REV. GIssued 1943-10Revised 2009-07Reaffirmed 2
5、015-09Superseding AMS4855FLeaded Red Brass, Sand and Centrifugal Castings85Cu 5.0Sn 5.0Pb 5.0ZnAs Cast(Composition similar to UNS C83600)RATIONALEAMS4855G has been reaffirmed to comply with the SAE five-year review policy.1. SCOPE 1.1 Form This specification covers a leaded red brass alloy in the fo
6、rm of sand and centrifugal castings. 1.2 Application These castings have been used typically for parts, such as fittings in fluid conducting lines, where soundness of castings is of prime importance, but usage is not limited to such applications. 2. APPLICABLE DOCUMENTS The issue of the following do
7、cuments 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 superseding docume
8、nt has been specified, the last published issue of that document shall apply. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS2694 In-Process Welding of
9、Castings AMS2804 Identification, Castings 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 208 Preparing Tension Test Specimens for Copper-Base Alloys for Sand, Permanent Mold, Cen
10、trifugal, and Continuous Castings ASTM E 8/E 8M Tension Testing of Metallic Materials ASTM E 478 Chemical Analysis of Copper Alloys ASTM E 1417 Liquid Penetrant Testing ASTM E 1742 Radiographic Examination 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in
11、Table 1, determined by wet chemical methods in accordance with ASTM E 478, by spectrochemical methods, or by other analytical methods acceptable to purchaser. TABLE 1 - COMPOSITION Element (3.1.1) min max Copper (3.1.3) 84.0 86.0 Tin 4.0 6.0 Lead 4.0 6.0 Zinc 4.0 6.0 Nickel plus Cobalt (3.1.3) - 1.0
12、 Iron - 0.30 Phosphorus - 0.05 Antimony - 0.25 Sulfur - 0.08 Aluminum - 0.005 Silicon - 0.005 Sum of Named Elements (3.1.2) 99.3 - 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
13、the manufacturer or supplier and purchaser 3.1.2 When all the elements the table are analyzed, the sum shall be 99.3 minimum, but such determination is not required for routine acceptance of each lot. 3.1.3 In determining copper minimum, copper may be calculated as copper plus nickel. 3.2 Condition
14、As cast; MO1(As Sand Cast) or MO2(As Centrifugally Cast) (See 8.2). 3.3 Casting Castings shall be produced in lots from metal conforming to 3.1. 3.3.1 A lot shall be all castings produced from one furnace melt or crucible melt. When two or more furnace melts, crucible melts, or combination thereof a
15、re used to charge a ladle for pouring, the castings therefrom shall constitute a lot. A lot shall be not more than 1000 pounds (454 kg) of castings. SAE INTERNATIONAL AMS4855G Page 2 of 6_ 3.4 Test Specimens Chemical analysis specimens and tensile coupons shall be cast as follows: 3.4.1 Chemical Ana
16、lysis Specimens Shall be cast from each melt and be of any convenient size, shape, and form. 3.4.2 Tensile Coupons Shall be cast with each lot of castings and in accordance with 3.4.2.1 and 3.4.2.2. Metal for the coupons shall be part of the melt which is used for the castings. If the metal for cast
17、ings is given any treatment, such as fluxing or cooling and reheating, the metal for the coupons shall be a portion of the metal so treated and, during such treatment, shall be heated to the same maximum temperature and held for approximately the same time as the molten metal for the castings. The t
18、emperature of the metal during pouring of the coupons shall be not lower than that during pouring of the castings. 3.4.2.1 Sand Cast Coupons from which specimens are machined shall be standard keel blocks conforming to ASTM B 208 cast in molds made with the regular foundry mix of sand without using
19、chills or baked sand core molds. Coupons shall be machined to standard tensile specimens conforming to ASTM E 8/E 8M with 0.500 inch (12.70 mm) diameter at the reduced parallel gage section. 3.4.2.2 Centrifugally Cast Coupons from which specimens are machined shall be cylindrical bars of such size a
20、s to allow machining of standard tensile specimens conforming to ASTM E 8/E 8M with 0.500 inch (12.70 mm) diameter at the reduced parallel gage section. 3.5 Properties Castings and representative tensile specimens produced in accordance with 3.4.2 shall conform to the following requirements: 3.5.1 T
21、ensile Properties Separately-cast specimens or specimens as in 4.3.4 cut from any area of a casting shall meet the requirements shown in Table 2, determined in accordance with ASTM E 8/E 8M. TABLE 2 - MINIMUM TENSILE PROPERTIES Property Value Tensile Strength Yield Strength at 0.2% Offset Elongation
22、 in 4D 30.0 ksi (207 MPa) 14.0 ksi ( 96.5MPa) 20% 3.5.1.1 Tensile properties of separately-cast specimens shall be used for acceptance of castings except when purchaser specifies that tensile properties of specimens cut from any area of a casting apply. 3.6 Quality Castings, as received by purchaser
23、, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the castings. 3.6.1 Castings shall have smooth surfaces and shall be cleaned sufficiently to permit nondestructive inspection. SAE INTERNATIONAL AMS4855G Page 3 of 6_ 3.
24、6.2 Castings shall be produced under radiographic control. This control shall consist of radiographic examination of castings in accordance with ASTM E 1742 until proper foundry technique, which will produce castings free from harmful internal imperfections, is established for each part number and o
25、f production castings as necessary to ensure maintenance of satisfactory quality. 3.6.3 When specified, castings shall be subjected to fluorescent penetrant testing in accordance with ASTM E 1417. 3.6.4 Radiographic, fluorescent penetrant, and other quality standards may be agreed upon by purchaser
26、and vendor. 3.6.5 Castings shall not be reworked by peening, plugging, welding, or other methods without written permission from purchaser. 3.6.5.1 When permitted in writing by purchaser, defects in castings may be removed and the castings reworked by welding in accordance with AMS2694. 4. QUALITY A
27、SSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of castings shall supply all samples for vendors 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 t
28、he castings conform to the specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Except as specified in 4.2.1.1, composition (3.1), tensile properties (3.5.1), and quality (3.6) are acceptance tests and shall be performed on each melt or lot as applicable. 4.2.1.1 Tensile proper
29、ties of specimens cut from castings shall be determined only when specified by purchaser or when separately-cast coupons are not available. Tensile properties of separately-cast coupons need not be determined when tensile properties of specimens cut from castings are determined. 4.2.2 Preproduction
30、Tests All technical requirements are preproduction tests and shall be performed prior to or on the first-article shipment of a casting to a purchaser, when a change in material and/ or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.3 Sampl
31、ing and Testing Shall be in accordance with the following: 4.3.1 One chemical analysis specimen in accordance with 3.4.1 from each melt or a casting from each lot. 4.3.2 Two separately-cast tensile specimens in accordance with 3.4.2 representing each lot except when properties of specimens cut from
32、castings are required. 4.3.3 Sufficient preproduction castings of each part number in accordance with 4.4.1 as required to satisfy dimensional, mechanical property, and quality evaluations. SAE INTERNATIONAL AMS4855G Page 4 of 6_ 4.3.4 One or more castings from each lot when properties of specimens
33、machined from castings are required. Specimens shall conform to ASTM E 8/E 8M and shall be either 0.500 inch (12.70 mm) in diameter at the reduced parallel gage section, subsize specimens proportional to the standard, or standard sheet-type specimens. For determining conformance to the requirements
34、of 3.5.1, if specimen locations are not shown on the drawing, not less than two tensile specimens, one from the thickest section and one from the thinnest section, shall be cut from a casting or castings from each lot. 4.4 Approval 4.4.1 Sample castings from new or reworked master patterns or molds
35、and the casting procedure shall be approved by purchaser before castings for production use are supplied, unless such approval be waived by purchaser. 4.4.2 Vendor shall establish, for production of sample castings of each part number, parameters for the process control factors which will produce ac
36、ceptable castings; these shall constitute the approved casting procedure and shall be used for producing production castings. If necessary to make any change in parameters for the process control factors, vendor shall submit for reapproval a statement of the proposed changes in processing and, when
37、requested, test specimens, sample castings, or both. Production castings incorporating the revised operations shall not be shipped prior to receipt of reapproval. 4.4.2.1 Control factors for producing castings include, but are not limited to, the following: Type of furnace Furnace atmosphere Fluxing
38、 or deoxidation procedure Gating and risering practices Metal pouring temperature; variation of 50 F (28 C) is permissible Mold set-up, parting agent, and rotational speed for centrifugal castings Solidification and cooling procedures Cleaning operations Methods of inspection 4.4.2.1.1 Any of the ab
39、ove process control factors for which parameters are considered proprietary by the vendor may be assigned a code designation. Each variation in such parameters shall be assigned a modified code designation. 4.5 Reports The vendor of castings shall furnish with each shipment a report showing the resu
40、lts of tests for chemical composition of at least one casting or of separately-cast specimens from each melt, the results of tests for tensile properties of separately-cast coupons representing each lot or of specimens cut from castings from each lot, and stating that the castings conform to the oth
41、er technical requirements. This report shall include the purchase order number, lot number, AMS4855G, part number, and quantity. 4.6 Resampling and Retesting If any specimen used in the above tests fails to meet the specified requirements, disposition of the castings may be based on the results of t
42、esting two additional specimens for each original nonconforming specimen. Failure of any retest specimen to meet the specified requirements shall be cause for rejection of the castings represented. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in acc
43、ordance with AMS2804. SAE INTERNATIONAL AMS4855G Page 5 of 6_ 5.2 Packaging Castings 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 castings to ensure carri
44、er acceptance and safe delivery. 6. ACKNOWLEDGMENT A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Castings not conforming to this specification, or to modifications authorized by purchaser, will be subj
45、ect to rejection. 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 complet
46、e 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. 8.2 Copper temper designations are defined in ASTM B 601. 8.3 Terms used in AMS are clarified in ARP1917. 8.4 Dimensions and pro
47、perties in inch/pound units 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. 8.5 Procurement documents should specify not less than the
48、 following: AMS4855G Type and part number or pattern number of castings desired Quantity of castings desired Type, location, and number of specimens for tensile testing when properties of specimens cut from castings are required (See 4.3.4) Nondestructive inspection acceptance standards (See 3.6.4). 8.6 Similar Specificat
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