SAE AMS 5333G-2017 Steel Investment Castings 0 50Cr - 0 55Ni - 0 25Mo (0 11 - 0 17C) (SAE 8615) Normalized (UNS J11442).pdf

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/AMS5333G AEROSPACE MATERIAL SPECIFICATION AMS5333 REV. G Issued 1955-03 Reaffirmed 2013-04 Revi

5、sed 2017-09 Superseding AMS5333F Steel, Investment Castings 0.50Cr - 0.55Ni - 0.25Mo (0.11 - 0.17C) (SAE 8615) Normalized (Composition similar to UNS J11442) RATIONALE AMS5333G results from a Five-Year Review and update of this specification that revises check analysis (3.1.2), radiographic acceptan

6、ce (3.7.4.1), reporting (4.5), and adds a requirement to report exceptions to technical requirements (4.5.1). 1. SCOPE 1.1 Form This specification covers a low-alloy steel in the form of investment castings. 1.2 Application These castings have been used typically for small parts of intricate design

7、which may require surface hardening by carburizing, 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 specification to the extent specified herein. The supplier may work to a su

8、bsequent 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 apply. 2.1 SAE Publications Available from SAE International, 400 Commonwealt

9、h 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 AMS2259 Chemical Check Analysis Limits Wrought Low-Alloy and Carbon Steels AMS2694 In-Process Welding of Castings AMS2804 Id

10、entification Castings SAE INTERNATIONAL AMS5333G Page 2 of 7 AMS-H-6875 Heat Treatment of Steel Raw Materials ARP1917 Clarification 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 19

11、428-2959, Tel: 610-832-9585, www.astm.org. ASTM E18 Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials ASTM E140 Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Ha

12、rdness, and Leeb Hardness ASTM E350 Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought Iron ASTM E1417 Liquid Penetrant Testing ASTM E1444 Magnetic Particle Testing ASTM E1742 Radiographic Examination 3. TECHNICAL REQUIREMENTS 3.1 Composition Castin

13、gs shall conform to the percentages by weight shown in Table 1, determined by wet chemical methods in accordance with ASTM E350, by spectrochemical methods, or by other analytical methods acceptable to purchaser (see 8.2.1 and 8.2.2). Table 1 - Composition Element Min Max Carbon 0.11 0.17 Manganese

14、0.65 1.00 Silicon 0.50 1.00 Phosphorus - 0.04 Sulfur - 0.04 Chromium 0.35 0.65 Nickel 0.35 0.75 Molybdenum 0.15 0.35 Copper - 0.35 3.1.1 Producer may test for any element not otherwise listed in Table 1 and include this analysis in the report of 4.5. Limits of acceptability may be specified by purch

15、aser (see 8.2.3). 3.1.2 Check Analysis Composition variations shall meet the applicable requirements of AMS2259. 3.2 Melting Practice Castings shall be poured at casting producers facility either from a melt (see 8.2.4) of a master heat or directly from a master heat (see 8.2.5). 3.2.1 Revert (gates

16、, sprues, risers, and rejected castings) may be used only in the preparation of master heats; revert shall not be remelted directly, without refining, for pouring of castings. Melting of revert creates a new master heat. SAE INTERNATIONAL AMS5333G Page 3 of 7 3.2.2 Portions of two or more qualified

17、master heats (see 3.4.1) may be melted together and poured into castings using a procedure authorized by purchaser (see 8.2.6). 3.2.3 If modifications, such as alloy additions or replenishments, are made by the producer at remelt, producer shall have a written procedure acceptable to purchaser (see

18、8.2.1) which defines the controls, test, and traceability criteria for castings. Control factors of 4.4.2.2 shall apply. 3.3 Condition Castings shall be delivered in the normalized condition. 3.4 Test Specimens 3.4.1 Each master heat shall be qualified by evaluation of a chemical analysis specimen.

19、3.4.1.1 If alloy additions or replenishments are made at remelt as in 3.2.3, the frequency of sampling and testing used by the producer for qualification to 3.4.1 shall be acceptable to purchaser. 3.4.2 Chemical Analysis Specimens Shall be of any convenient size and shape. 3.5 Heat Treatment Casting

20、s shall be heat treated in accordance with AMS-H-6875, except as specified in 3.5.1. 3.5.1 Normalize Heat to a selected temperature in the range 1700 to 1750 F (927 to 954 C), in an atmosphere neutral to the specified carbon range, hold at heat for not less than one hour, and cool at a rate equivale

21、nt to that obtained in still air. 3.6 Properties Castings shall conform to the following requirements: 3.6.1 Hardness of Castings Shall be not higher than 90 HRB, or equivalent (see 8.3) determined in accordance with ASTM E18: 3.6.2 Carburization or Decarburization The carbon content shall be within

22、 the limits of 3.1 throughout the casting except within 0.003 inch (0.08 mm) of the surface. 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 from imperfections detrimental to usage of the castings. Castings s

23、hall be free of cracks, laps, hot tears, and cold shuts, and shall be free of scale and other process-induced surface contamination which would obscure defects. 3.7.2 Castings shall be produced under radiographic control. This control shall consist of radiographic examination of each casting part nu

24、mber 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 maintenance of internal quality. 3.7.2.1 Radiographic inspec

25、tion shall be conducted in accordance with ASTM E1742 or other method specified by purchaser. 3.7.3 When specified, castings shall be subjected to additional nondestructive testing as follows: SAE INTERNATIONAL AMS5333G Page 4 of 7 3.7.3.1 Fluorescent penetrant inspection in accordance with ASTM E14

26、17 or other 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, fluorescent penetrant, magnetic particle, visual, and other inspection methods shall be as agreed upon by

27、 purchaser and producer (see 8.2.7). 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, sand spots, and inclusi

28、ons 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 welding program acceptabl

29、e 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 perform any confirmato

30、ry testing deemed necessary to ensure that the castings conform to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), hardness (3.6.1), and applicable requirements of quality (3.7) are acceptance tests and shall be performed as specified in 4.3. 4.2.2 Perio

31、dic Tests Carburization/decarburization (3.6.2) and radiographic soundness (3.7.2) are periodic tests and shall be performed at a frequency selected by the producer unless frequency of testing is specified by purchaser. 4.2.3 Preproduction Tests All technical requirements are preproduction tests and

32、 shall be performed on 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 producer shall be in accordance with the following: 4.3.1 One chemical analysis s

33、pecimen or a casting from each master heat shall be tested for conformance with Table 1; if 3.4.1.1 applies, test frequency shall be acceptable to purchaser. 4.3.2 One preproduction casting in accordance with 4.4 shall be tested to the requirements of the casting drawing and to all technical require

34、ments. 4.3.2.1 Dimensional inspection sample quantity shall be as specified by purchaser. 4.3.3 Castings shall be inspected in accordance with 3.7 to the methods, frequency, and acceptance standards specified by purchaser. 4.3.4 Unless otherwise specified by purchaser, one casting from each lot shal

35、l be tested for hardness to determine conformance with 3.6.1. SAE INTERNATIONAL AMS5333G Page 5 of 7 4.3.4.1 In the event of failure, the entire lot shall be 100% inspected or reheat treated in accordance with 4.6.2. 4.4 Approval 4.4.1 Sample casting(s) from new or reworked master patterns produced

36、under the casting procedure of 4.4.2 shall be approved by purchaser before castings for production use are supplied, unless such approval is waived by purchaser. 4.4.2 For each casting part number, producer shall establish parameters for process control factors that will consistently produce casting

37、s meeting the requirements of the casting drawing and this specification. These parameters shall constitute the approved casting procedure and shall be used for production of subsequent castings. If necessary to make any change to these parameters, producer shall submit a statement of the proposed c

38、hanges for purchaser reapproval. When requested, producer shall also submit sample castings to purchaser for reapproval. 4.4.2.1 Production castings produced prior to receipt of purchasers approval shall be at producers risk. 4.4.2.2 Control factors for producing castings include, but are not limite

39、d to, the factors shown below. Producers procedures shall identify tolerances, ranges, and/or control limits, as applicable. Composition of ceramic cores, if used Arrangement and number of patterns in the mold Size, shape, and location of gates and risers Mold refractory formulation Grain refinement

40、 methods, if applicable Mold backup material (weight, thickness, or number of dips) Type of furnace, atmosphere, and charge for melting Mold preheat and metal pouring temperatures Fluxing or deoxidation procedure Replenishment and alloy addition procedures, if applicable Time molten metal is in furn

41、ace Solidification and cooling procedures Cleaning operations (mechanical and chemical) Welding procedure, if applicable Heat treatment Straightening Final inspection methods. 4.4.2.2.1 Any of the control factors of 4.4.2.2 for which parameters are considered proprietary by the producer may be assig

42、ned a code designation. Each variation in such parameters shall be assigned a modified code designation. 4.4.2.2.1.1 Unless otherwise agreed upon by purchaser and producer, purchaser shall be entitled to review proprietary control factor details and coding at producers facility. 4.5 Reports The prod

43、ucer of castings shall furnish with each shipment a report showing the producer identity, country where the metal was melted (e.g., final melt in the case of metal processed by multiple melting operations) and the results of tests to determine conformance to the acceptance test requirements. This re

44、port shall include the purchase order number, master heat identification, heat treat/lot identification, AMS5333G, part number, and quantity. 4.5.1 When exceptions are taken to the technical requirements listed in Section 3, the report shall contain a statement “This material is certified as AMS5333

45、G(EXC) because of the following exceptions:“ and the specific exceptions shall be listed. 4.6 Resampling and Retesting If results of a valid test fail to meet specified requirements, except as in 4.3.4.1, two additional samples in accordance with 4.3 from the same master heat, modified melt (see 3.2

46、.3), or lot as applicable, shall be tested for each nonconforming characteristic. The results of each additional test, and the average of the results of all tests (original and retests), shall meet specified requirements; otherwise, the master heat or lot shall be rejected. Results of all tests shal

47、l be reported. SAE INTERNATIONAL AMS5333G Page 6 of 7 4.6.1 A test may be declared invalid if failure is due to specimen miss preparation, test equipment malfunction, or improper test procedure. 4.6.2 Unless otherwise authorized by purchaser, castings may be subjected to not more than one reheat tre

48、atment cycle of 3.5.1 in the event of hardness failure. Upon reheat treatment, castings shall be submitted for testing in accordance with 4.3.3 and 4.3.4. 5. PREPARATION FOR DELIVERY 5.1 Identification Unless otherwise specified by purchaser, individual castings shall be identified in accordance wit

49、h AMS2804. 5.2 Traceability Individual castings shall be traceable to their conditions of manufacture and inspection up to and including the point of acceptance by purchaser. 5.3 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 carrier acceptance and