SAE AMS 5337E-2017 Steel Maraging Investment Castings 18 5Ni - 9 0Co - 5 0Mo - 0 70Ti - 0 12Al Vacuum Melted Homogenized Overaged and Solution Heat Treated (UNS J93150).pdf

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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 2017 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.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/AMS5337E AEROSPACE MATERIAL SPECIFICATION AMS5337 REV. E Issued 1971-05 Reaffirmed 2011-11 Revi

5、sed 2017-09 Superseding AMS5337D Steel, Maraging, Investment Castings 18.5Ni - 9.0Co - 5.0Mo - 0.70Ti - 0.12Al Vacuum Melted Homogenized, Overaged, and Solution Heat Treated (Composition similar to UNS J93150) RATIONALE AMS5337E results from a Five-Year Review and update of this specification that a

6、dds strain rate control for tensile testing (3.6.1.1), modifies radiographic acceptance criteria (3.7.4.1), reporting (4.5), and notification of exceptions to the specification requirements (4.5.5). 1. SCOPE 1.1 Form This specification covers an alloy steel in the form of investment castings. 1.2 Ap

7、plication These castings have been used typically for heat treated parts requiring ultra-high strengths up to 600 F (316 C), 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 this sp

8、ecification 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 document has been specified, the last published issue of that document shall appl

9、y. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2175 Castings, Classification and Inspection of AMS2248 Chemical Check Analysis Limits Corrosion an

10、d Heat-Resistant Steels and Alloys, Maraging and Other Highly-Alloyed Steels, and Iron Alloys SAE INTERNATIONAL AMS5337E Page 2 of 11 AMS2360 Room Temperature Tensile Properties of Castings AMS2694 In-Process Welding of Castings AMS2750 Pyrometry AMS2804 Identification Castings ARP1917 Clarification

11、 of Terms Used in Aerospace Metals Specifications 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 A370 Mechanical Testing of Steel Products ASTM E140 Hardness Conversion Tables for M

12、etals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness ASTM E353 Chemical Analysis of Stainless, Heat Resisting, Maraging, and Other Similar Chromium-Nickel-Iron Alloys ASTM E1417 Liquid Penetrant

13、Testing ASTM E1444 Magnetic Particle Testing ASTM E1742 Radiographic Examination 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 E353, by spectrochemical methods, or by other analytical

14、methods acceptable to purchaser (see 8.3.1 and 8.3.2). Table 1 - Composition Element Min Max Carbon Manganese Silicon Phosphorus Sulfur Nickel Cobalt Molybdenum Titanium Aluminum - - - - - 18.00 8.50 4.50 0.55 0.05 0.03 0.10 0.10 0.010 0.010 19.00 9.50 5.50 0.85 0.20 3.1.1 Producer may test for any

15、element not otherwise listed in Table 1 and include this analysis in the report of 4.5. Limits of acceptability may be specified by purchaser (see 8.3.3). 3.1.2 Check Analysis Composition variations shall meet the applicable requirements of AMS2248. SAE INTERNATIONAL AMS5337E Page 3 of 11 3.2 Meltin

16、g Practice Castings and specimens shall be poured at casting producers facility either from a melt (see 8.3.4) of a master heat, or directly from a master heat (see 3.4.2 and 8.3.5). 3.2.1 The metal for castings and specimens shall be melted and poured under vacuum without loss of vacuum between mel

17、ting and pouring. When authorized by purchaser (see 8.3.6), protective atmosphere may be used in lieu of vacuum for pouring of castings. 3.2.2 Revert (gates, sprues, risers, and rejected castings) may be used only in the preparation of master heats; revert shall not be remelted directly without refi

18、ning for pouring of castings. Melting of revert creates a new master heat. 3.2.3 Portions of two or more qualified master heats (see 3.4.2) may be melted together and poured into castings using a procedure authorized by purchaser (see 8.3.6). 3.2.4 If melts are modified by replenishment (see 8.3.7),

19、 producer shall have a written procedure acceptable to purchaser that defines the controls, test and traceability criteria for both castings and separately-cast specimens. Control factors of 4.4.2.2 shall apply. 3.3 Condition Castings shall be delivered in the homogenized, overaged, and solution hea

20、t treated condition (see 3.5). 3.4 Test Specimens Specimens shall be separately-cast, integrally-cast (see 8.3.8), or machined from a casting, and shall conform to 3.2. 3.4.1 If specimens are separately-cast, producer shall have a written procedure acceptable to purchaser. Control factors of 4.4.2.2

21、 shall apply. 3.4.2 Each master heat shall be qualified by evaluation of chemical, hardness, and tensile specimens. 3.4.2.1 If replenishments are made at remelt as in 3.2.4, the frequency of sampling and testing used by the producer for qualification to 3.4.2 shall be acceptable to purchaser. 3.4.2.

22、2 Tensile tests of 3.4.2 are not required if these tests are conducted using integrally-cast specimens (4.3.3.2) or specimens machined-from-casting (4.3.3.3). 3.4.3 Chemical Analysis Specimens Shall be of any convenient size and shape. 3.4.4 Tensile Specimens Shall be of standard proportions in acco

23、rdance with ASTM A370 with 0.250 inch (6.35 mm) diameter at the reduced parallel gage section. 3.4.4.1 Separately-cast and integrally-cast specimens may be either cast to size or cast oversize and subsequently machined to 0.250 inch (6.35 mm) diameter. 3.4.4.2 When integrally-cast specimens and/or s

24、pecimens machined-from-casting are specified, specimen size and location shall be as agreed upon by purchaser and producer (see 8.3.9 and 8.5). 3.4.5 Hardness Specimens for Response to Heat Treatment May be a representative specimen or a casting. SAE INTERNATIONAL AMS5337E Page 4 of 11 3.5 Heat Trea

25、tment To produce the condition in castings for delivery, heat treat as specified in 3.5.1 to conform to hardness of 3.6.2.1. Pyrometry shall be in accordance with AMS2750. 3.5.1 Production Castings and Specimens 3.5.1.1 Homogenization Heat to 2100 F 25 F (1149 C 14 C), hold at heat for 4 hours 0.25

26、hour, and cool to room temperature at a rate equivalent to air cool or faster. 3.5.1.2 Overaging Heat to 1100 F 25 F (593 C 14 C), hold at heat for 1 to 4 hours, and cool to room temperature at a rate equivalent to air cool or faster. Alternately, heat to the solution heat treating temperature direc

27、tly after overaging without cooling between steps. 3.5.1.3 Solution Heat to 1500 F 25 F (816 C 14 C), hold at heat for 1 hour per inch (25 mm) of section thickness but in no case less than 1 hour, and cool to room temperature at a rate equivalent to air cool or faster. 3.5.2 Response to Heat Treatme

28、nt Castings or specimens for testing after maraging shall be heat treated as in 3.5.1 and the following: 3.5.2.1 Marage Heat to 900 F 15 F (482 C 8 C), hold at heat for 3 hours 0.25 hour, and cool to room temperature at a rate equivalent to air cool or faster. 3.5.3 Tensile specimens used for master

29、 heat qualification may be heat treated separately from castings. 3.6 Properties Conformance shall be based upon testing of separately-cast specimens unless purchaser specifies integrally-cast specimens or specimens machined-from-casting. Properties of integrally-cast specimens or specimens machined

30、-from-casting shall be as specified by purchaser (see 8.5). 3.6.1 Room Temperature Tensile Properties of Separately-Cast Specimens Shall be as shown in Table 2, determined in accordance with ASTM A370, after heat treatment in accordance with 3.5.1 and 3.5.2. Properties other than those listed may be

31、 defined as specified in AMS2360. Table 2 - Minimum room temperature tensile properties of separately-cast specimens Property Value Tensile Strength Yield Strength at 0.2% Offset Elongation in 4D Reduction in Area 270 ksi (1862 MPa) 250 ksi (1724 MPa) 3% 10% 3.6.1.1 The strain rate shall be set at 0

32、.005 inch/inch/minute (0.005 mm/mm/minute) and maintained within a tolerance of 0.002 inch/inch/minute (0.002 mm/mm/minute) through 0.2% offset yield strain. After the yield strain, the speed of the testing machine shall be set between 0.05 and 0.5 inch/inch (mm/mm) of the length of the reduced sect

33、ion (or distance between the grips for specimens not having a reduced section) per minute. Alternatively, an extensometer and strain rate indicator may be used to set the strain rate between 0.05 and 0.5 inch/inch/minute (mm/mm/minute). SAE INTERNATIONAL AMS5337E Page 5 of 11 3.6.2 Hardness Shall be

34、 as follows, determined in accordance with ASTM A370: 3.6.2.1 Production castings in the homogenized, overaged, and solution heat treated condition of 3.5.1 shall have hardness not higher than 35 HRC, or equivalent (see 8.2). 3.6.2.2 Hardness as a Response to Heat Treatment Castings and specimens in

35、 the homogenized, overaged, solution heat treated, and maraged condition of 3.5.1 and 3.5.2 shall have hardness not lower than 50 HRC, or equivalent (see 8.2). 3.7 Quality 3.7.1 Castings, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and

36、from imperfections detrimental to usage of the castings. Castings shall be free of cracks, laps, hot tears, and cold shuts, and free of scale and other process-induced surface contamination that would obscure defects. 3.7.2 Castings shall be produced under radiographic control. This control shall co

37、nsist of radiographic examination of each casting part number until foundry manufacturing controls in accordance with 4.4.2 have been established. Additional radiography shall be conducted in accordance with the frequency of inspection specified by purchaser, or as necessary to ensure continued main

38、tenance of internal quality. 3.7.2.1 Radiographic inspection shall be conducted in accordance with ASTM E1742 or other process method specified by purchaser. 3.7.3 When specified, additional nondestructive testing shall be performed as follows: 3.7.3.1 Fluorescent penetrant inspection in accordance

39、with ASTM E1417 or other process method specified by purchaser. 3.7.3.2 Magnetic particle inspection in accordance with ASTM E1444 or other method specified by purchaser. 3.7.4 Acceptance standards for radiographic, magnetic particle, fluorescent penetrant, visual, and other inspection methods shall

40、 be as agreed upon by purchaser and producer (see 8.3.9). AMS2175 may be used to specify acceptance standards (casting grade) and frequency of inspection (casting class). 3.7.4.1 When acceptance standards are not specified, Grade C of AMS2175 shall apply and radiographic indications of gas holes, sa

41、nd spots, and inclusions shall be cause for rejection when closer to the edge than twice their maximum dimension. 3.7.5 Castings shall not be peened, plugged, impregnated, or welded unless authorized by purchaser. 3.7.5.1 When authorized by purchaser, welding in accordance with AMS2694 or other weld

42、ing program acceptable to purchaser may be used. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The producer of castings shall supply all samples for producers tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and to p

43、erform any confirmatory testing deemed necessary to ensure that the castings conform to specified requirements. SAE INTERNATIONAL AMS5337E Page 6 of 11 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile properties (3.6.1), hardness (3.6.2.1 and 3.6.2.2), and the applicable

44、 requirements of quality (3.7) are acceptance tests and shall be performed as specified in 4.3. 4.2.2 Periodic Tests Radiographic soundness (3.7.3) is a periodic test and shall be performed at a frequency selected by producer, unless frequency of testing is specified by purchaser. 4.2.3 Preproductio

45、n Tests All technical requirements are preproduction tests and shall be performed on specimens or sample castings (4.3.2), when a change in control factors occurs (4.4.2.2), and when purchaser deems confirmatory testing to be required. 4.3 Sampling and Testing The minimum testing performed by produc

46、er shall be in accordance with the following: 4.3.1 One chemical analysis specimen or a casting from each master heat shall be tested for conformance with Table 1; if 3.4.2.1 applies, test frequency shall be acceptable to purchaser. 4.3.2 One preproduction casting in accordance with 4.4 shall be tes

47、ted to the requirements of the casting drawing and to all technical requirements. 4.3.2.1 Dimensional inspection sample quantity shall be as specified by purchaser. 4.3.3 Tensile tests shall be conducted to determine conformance with Table 2. Sampling and test frequency are dependent upon the type a

48、nd origin of specimen specified by purchaser (see 3.4.4 and 3.6) or selected by producer (See 4.3.3.4). When 3.4.2.1 applies, test frequency shall be acceptable to purchaser. 4.3.3.1 For separately-cast specimens in the homogenized, overaged, solution heat treated, and maraged condition of 3.5.2, on

49、e specimen from each master heat shall be tested for conformance to 3.6.1. 4.3.3.2 For integrally-cast specimens in the homogenized, overaged, solution heat treated, and maraged condition of 3.5.2, two specimens from each lot (see 8.3.10) shall be randomly selected and tested for conformance to properties specified by purchaser (see 3.6 and 8.5). 4.3.3.3 For specimens machined-from-casting, on