1、_SAE Technical Standards Board Rules providHWKDW7KLVUHSRUWLVSXEOLVKHGE6$(WRDGYDQFHWKHVWDWHRIWHFKQ LFDODQGHQJLQHHULQJVFLHQFHV7KHXVHRIWKLVUHSRUWL sentirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising thereIURPLVWKHVROHUHVSRQVLELOLW
2、RIWKHXVHUSAE 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 2016 SAE InternationalAll rights reserved. No part of this publication may be reproduced, stored in
3、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: 724-776-0790Email: Cus
4、tomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS4873FAEROSPACEMATERIAL SPECIFICATIONAMS4873REV. FIssued 1946-01Revised 2005-08Reaffirmed 201-Superseding AMS4873EAluminum Bron
5、ze Alloy, Sand Castings85Cu - 11Al - 3.6FeSolution Heat Treated and Tempered(Composition similar to UNS C95420)RATIONALEAMS4873F has been reaffirmed to comply with the SAE five-year review policy.1. SCOPE:1.1 Form: This specification covers an aluminum bronze alloy in the form of sand castings. 1.2
6、Application: These castings have been used typically for parts requiring strength and corrosion resistance at moderate temperatures, but usage is not limited to such applications. 2. APPLICABLE DOCUMENTS:The issue of the following documents in effect on the date of the purchase order forms a part of
7、this specification to the extent specified herein. The supplier may work to a subsequent revision ofa document unless a specific document issue is specified. When the referenced document hasbeen cancelled and no superseding document has been specified, the last published issue of thatdocument shall
8、apply.2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or www.sae.org. AMS 2175 Casting, Classification and Inispection of AMS 2360 Room Temperature Tensile Properties of Castings AMS 2694 Repair Welding of Aerospace Castings AMS 2804 Identification, Castin
9、gs 2.2 ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959 or www.astm.org. ASTM E 8 Tension Testing of Metallic Materials ASTM E 8M Tension Testing of Metallic Materials (Metric) ASTM E 10 Brinell Hardness of Metallic Materials ASTM E 29 Pr
10、actice for Using Significant Digits in Test Data to Determine Conformance with Specifications ASTM E 272 Reference Radiographics for High Strength-Copper-Base and Nickel-Copper Alloy Castings ASTM E 478 Chemical Analysis of Copper Alloys ASTM E 1417 Liquid Penetrant Examination ASTM E 1742 Radiograp
11、hic Inspection 3. TECHNICAL REQUIREMENTS: 3.1 Composition: Shall conform to the percentages by weight shown in Table 1, determined by wet chemical methods in accordance with ASTM E 478, by spectrochemical methods, or by other analytical methods acceptable to purchaser (see 3.4.1). TABLE 1 - Composit
12、ion Element (3.1.1, 3.1.2) min max Copper (3.1.4) 83.5 - Aluminum 10.5 12.0 Iron 3.0 4.3 Manganese - 0.50 Nickel + Cobalt - 0.50 Copper plus sum of named elements (3.1.3) 99.5 - 3.1.1 Test results may be rounded by the “rounding off” method of ASTM E 29. 3.1.2 These composition limits do not preclud
13、e the presence of other elements. Limits may be established and analysis required for unnamed elements by agreement between the manufacturer or supplier and supplier or purchaser. 3.1.3 When all named elements in Table 1 are analyzed, the sum shall be 99.5% minimum, but such determination is not req
14、uired for routine acceptance of each lot. 3.1.4 Copper may be reported as “remainder”, or as the difference between the sum of results for all elements and 100%, or as the result of direct analysis. SAE INTERNATIONAL AMS4873F Page 2 of 9_3.2 Condition: Solution heat treated and tempered. 3.3 Casting
15、s: Castings shall be produced from metal conforming to 3.1 determined by analysis of a specimen (3.4.1) cast after the last melt addition. 3.4 Cast Test Specimens: Chemical analysis specimens and tensile specimens shall be cast as follows: 3.4.1 Chemical Analysis Specimen: Shall be cast from each me
16、lt after the last melt addition and shall be tested to qualify the melt lot as in 3.1. Additional samples shall be required for each additional 8 hours of holding time. 3.4.2 Tensile Specimens: 3.4.2.1 Unless specimens cut from castings are specified by the purchaser, separately cast specimens, conf
17、orming to ASTM E 8 or ASTM E 8M, shall be cast from each melt, after the last melt addition. Specimens shall be cast in molds representing the mold formulation used for castings. Chills are not permitted on test specimen cavity except on the end face of the specimen when approved in accordance with
18、4.4.2. A tensile specimen shall be processed with each heat treat lot and tested for conformance to 3.6.1.1. 3.4.2.2 When purchaser specifies specimens cut from castings, such specimens shall be removed after heat treatment, shall be machined to conform to ASTM E 8 or ASTM E 8M, and shall be either
19、0.500 inch (12.70 mm) diameter at the reduced parallel gage section, subsize specimens proportional to the standard, or standard sheet-type specimens, as required in 3.6.1.2 or 3.6.1.3. 3.5 Heat Treatment: Castings and representative tensile specimens shall be solution heat treated and tempered in a
20、ccordance with the following; unless specimens cut from a casting are specified, one or more sets of separately cast tensile specimens shall, during each stage of heat treatment, be put into a batch- type furnace with each load of castings or into a continuous furnace at intervals of not longer than
21、 three hours. 3.5.1 Castings and tensile specimens shall be heated to not lower than 1600 F (871 C), held at heat for the proper time for solution heat treatment, and quenched. 3.5.2 Castings and tensile specimens shall be heated to not lower than 1100 F (593 C), held at heat for the proper time for
22、 tempering, and cooled in air. SAE INTERNATIONAL AMS4873F Page 3 of 9_3.6 Properties: Castings and representative tensile specimens produced in accordance with 3.4.2 shall conform to the following requirements: 3.6.1 Tensile Properties: Shall be as follows, determined in accordance with ASTM E 8 or
23、ASTM E 8M; conformance to the requirements of 3.6.1.1 shall be used as the basis for acceptance of castings except when purchaser specifies that the requirements of 3.6.1.2 apply: 3.6.1.1 Separately-Cast Specimens: Shall be as shown in Table 2. TABLE 2 - Minimum Tensile Properties Property Value Ten
24、sile Strength 85.0 ksi (586 MPa) Yield Strength at 0.2% Offset 45.0 ksi (310 MPa) Elongation in 4D 5% ksi 3.6.1.2 Specimens Cut From Castings: The average of not less than four, and preferably 10, specimens shall be as shown in Table 2 for sections of castings 1 inch (25.4 mm) and under in nominal t
25、hickness. Tensile properties of castings over 1 inch (25.4 mm) in nominal thickness shall be as shown in Table 3. TABLE 3 - Minimum Tensile Properties Property Value Tensile Strength 72.0 ksi (496 MPa) Yield Strength at 0.2% Offset 36.0 ksi (248 MPa) Elongation in 4D 5% ksi 3.6.1.2.1 When properties
26、 other than those specified in 3.6.1.2 are required, specimens machined from locations indicated on the drawing from a casting chosen at random to represent the lot, shall have the properties indicated on the drawing for such specimens. Property requirements may be designated in accordance with AMS
27、2360. 3.6.2 Castings shall have hardness of 200 to 235 HB or equivalent, determined in accordance with ASTM E 10. 3.7 Quality: Castings, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the cast
28、ings. 3.7.1 When acceptance standards are not specified, Grade C of AMS 2175 shall apply. ASTM E 272 may be used to define radiographic acceptance standards. SAE INTERNATIONAL AMS4873F Page 4 of 9_3.7.2 Methods of inspection and frequency of inspection shall be as agreed upon by purchaser and vendor
29、. A “Casting Class” of AMS 2175 may be selected to specify the method and frequency of inspection. 3.7.3 Castings shall be produced under radiographic control. This control shall consist of 100% radiographic inspection of castings until process control factors (4.4.2) have been established to ensure
30、 production of acceptable castings. Unless otherwise specified by the purchaser, continued radiographic inspection of production castings shall be performed at a frequency determined by the vendor to assure continued maintenance of internal quality. 3.7.3.1 Radiographic inspection shall be conducted
31、 in accordance with ASTM E 1742, unless otherwise specified by purchaser. 3.7.4 When specified by purchaser, castings shall be fluorescent penetrant inspected using a method specified by the purchaser, or, if not specified, a method in accordance with ASTM E 1417. 3.7.5 Castings shall not be peened,
32、 plugged, impregnated, or welded unless authorized by purchaser. 3.7.5.1 When authorized by purchaser, welding in accordance with AMS 2694 or other welding program approved by the purchaser may be used. 4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for Inspection: The vendor of castings shall
33、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 the castings conform to specified requirements. 4.2 Classification of Tests: 4.2.1 A
34、cceptance Tests: Except as specified in 4.2.1.1, composition (3.1), tensile properties of separately cast specimens (3.6.1.1), or, when specified, tensile properties of specimens cut from a casting (3.6.1.2), hardness (3.6.2), and quality (3.7) are acceptance tests and shall be performed to represen
35、t each melt or heat treat lot as applicable. 4.2.1.1 Tensile properties of specimens cut from a casting shall be determined when specified by purchaser or when separately-cast specimens are not available. Tensile properties of separately-cast specimens need not be determined when tensile properties
36、of specimens cut from a casting are determined. SAE INTERNATIONAL AMS4873F Page 5 of 9_4.2.2 Periodic Tests: Radiographic inspection (3.7.3) following the establishment of process control (4.4.2) are periodic tests and shall be performed at a frequency selected by the vendor unless frequency of test
37、ing is specified by the purchaser. 4.2.3 Preproduction Tests: All technical requirements of this specification are preproduction tests and shall be performed 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 wh
38、en purchaser deems confirmatory testing to be required. 4.3 Sampling and Testing: Shall be in accordance with the following: 4.3.1 One or more chemical analysis specimens in accordance with 3.4.1 from each melt for conformance to 3.1. 4.3.2 Three separately-cast tensile specimens in accordance with
39、3.4.2 from each heat treat lot except when purchaser requires properties of specimens cut from castings as in 4.3.4. 4.3.3 One or more preproduction castings in accordance with 4.4.1 of each part number. 4.3.4 One or more castings from each heat treat lot when tensile properties of specimens are mac
40、hined from a casting. For determining conformance to the requirements of 3.6.1.2.1, if specimen locations are not shown on the drawing, two specimens from the thickest section and two specimens from the thinnest section, shall be cut from a casting or castings from each lot. 4.4 Approval: 4.4.1 Samp
41、le castings from new or reworked patterns or molds 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 fo
42、r the process control factors which will produce acceptable castings; these shall constitute the approved casting procedure and shall be used for producing production castings. Vendor shall also establish a single procedure for production of separately-cast tensile specimens. Method for production o
43、f separately-cast tensile specimens shall be consistent for all material cast to this specification. Control factors for producing separately-cast tensile specimens need not be the same as those used for production of castings. If necessary to make any change in parameters for the process control fa
44、ctors, vendor shall submit for reapproval a statement of the proposed changes in processing and, when requested, sample castings and/or test specimens. Production castings incorporating the revised operations shall not be shipped prior to receipt of reapproval. SAE INTERNATIONAL AMS4873F Page 6 of 9
45、_4.4.2.1 Unless otherwise specified by purchaser, one casting from each lot shall be tested for hardness to determine conformance with 3.6.2. 4.4.2.2 Control factors for producing castings and separately-cast tensile specimens include, but are not limited to, the following. Suppliers procedures shal
46、l identify tolerances, ranges and/or control limits, as applicable. Control factors for separately cast tensile specimens must generally represent, but need not be identical to, those factors used for castings: Type of furnace Furnace atmosphere Alloy additions, fluxing, deoxidation and gas removal
47、procedures Gating and risering practices Mold composition and molding practice Core composition and fabrication method, when applicable Melt hold time Metal pouring temperature Solidification and cooling procedures Solution heat treat and stabilization cycles Straightening procedure, when applicable Cleaning operations Methods of inspec
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