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 reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2011 SAE International All rights reserved. No part of this publication m
3、ay 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 (outside U
4、SA) 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:/www.sae.org/technical/standards/AMS6543EAEROSPACEMATERIALSPECIFICATIONAMS6543 REV. E Issued 1975-09 Revised 2011-06Supersedin
5、g AMS6543D Steel, Bars and Forgings 2.0Cr - 10Ni - 8.0Co - 1.0Mo (0.10 - 0.14C) (HY-180) Double Vacuum Melted Solution Heat Treated, Marage Hardenable (Composition similar to UNS K91970)RATIONALE AMS6543E results from a Five Year Review and update of this specification. 1. SCOPE 1.1 Form This specif
6、ication covers a premium aircraft-quality maraging steel in the form of bars 0.50 inch (12.7 mm) and over in nominal diameter or least distance between parallel sides, forgings, and forging stock. 1.2 Application These products have been used typically for heat treated parts requiring a combination
7、of high strength, toughness, and weldability, 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 subseque
8、nt 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 Commonwealth Driv
9、e, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.AMS2248 Chemical Check Analysis Limits, Corrosion and Heat-Resistant Steels and Alloys, Maraging and Other Highly-Alloyed Steels, and Iron Alloys AMS2251 Tolerances, Low-Alloy Steel Bar
10、s AMS2370 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel Wrought Products and Forging Stock Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS6543E Page 2 of 8 AMS2372 Qualit
11、y Assurance Sampling and Testing, Carbon and Low-Alloy Steel Forgings AMS2630 Inspection, Ultrasonic, Product Over 0.5 Inch (12.7 mm) Thick AMS2750 Pyrometry AMS2806 Identification, Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and All
12、oys AMS2808 Identification, Forgings AS1182 Standard Stock Removal Allowance, Aircraft-Quality and Premium Aircraft-Quality Steel Bars and Mechanical Tubing 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9
13、585, www.astm.org.ASTM A 370 Mechanical Testing of Steel Products ASTM A 604 Macroetch Testing of Consumable Electrode Remelted Steel Bars and Billets ASTM E 353 Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron Alloys 3. TECHNICAL REQUIREMENTS 3.1 Comp
14、osition Shall conform to the percentages by weight shown in Table 1, determined by wet chemical methods in accordance with ASTM E 353, by spectrochemical methods, or by other analytical methods acceptable to purchaser. TABLE 1 - COMPOSITION Element min max Carbon 0.10 0.14 Manganese 0.05 0.25Silicon
15、 - 0.10 Phosphorus - 0.010 Sulfur - 0.006 Chromium 1.80 2.20 Nickel 9.50 10.50Cobalt 7.50 8.50 Molybdenum 0.90 1.10Titanium - 0.015 Aluminum - 0.025Oxygen - 0.0025 (25 ppm)Nitrogen - 0.0075 (75 ppm)Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or net
16、working permitted without license from IHS-,-,-SAE AMS6543E Page 3 of 8 3.1.1 Check Analysis Composition variations shall meet the applicable requirements of AMS2248. No variation is permitted for oxygen and nitrogen. 3.2 Melting Practice Shall be multiple melted using vacuum induction melting follo
17、wed by vacuum consumable electrode remelting. 3.3 Condition The product shall be supplied in the following condition; hardness shall be determined in accordance with ASTM A 370: 3.3.1 Bars Bar shall not be cut from plate. Hot finished, solution heat treated, and descaled, having hardness not lower t
18、han 42 HRC, or equivalent (See 8.2). 3.3.2 Forgings Hot finished, solution heat treated, and descaled, having hardness not lower than 42 HRC, or equivalent (See 8.2). 3.3.3 Forging Stock As ordered by the forging manufacturer. 3.4 Heat Treatment Bars and forgings shall be solution heat treated as in
19、 3.4.1 or 3.4.2, as applicable, holding at heat for sufficient time to ensure complete transformation, and quenching in agitated water sufficiently cool (See 8.3) to develop the mechanical properties specified herein. Pyrometry shall be in accordance with AMS2750. 3.4.1 Product 2.0 Inches (51 mm) an
20、d Under in Nominal Section Thickness Shall be solution heat treated by heating in air to 1525 F 25 (829 C 14) and quenching. 3.4.2 Product Over 2.0 Inches (51 mm) in Nominal Section Thickness Shall be solution heat treated by heating in air to 1650 F 25 (899 C 14), quenching, reheating to 1525 F 25
21、(829 C 14), and quenching. 3.5 Properties The product shall conform to the following requirements; tensile and impact testing shall be performed in accordance with ASTM A 370: 3.5.1 Bars and Forgings 3.5.1.1 As Solution Heat Treated Copyright SAE International Provided by IHS under license with SAEN
22、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS6543E Page 4 of 8 3.5.1.1.1 Macrostructure Visual examination of transverse full cross-sections from bars, forgings, and forging stock, etched in hot hydrochloric acid in accordance with ASTM A 604, shall show n
23、o pipe or cracks. Porosity, segregation, inclusions, and other imperfections shall be no worse than the macrographs of ASTM A 604 shown in Table 2. TABLE 2 - MACROSTRUCTURE LIMITS Class Condition Severity 1 Freckles A 2 White Spots A 3 Radial Segregation B 4 Ring Pattern B 3.5.1.2 Response to Heat T
24、reatment (Maraging) for Bars and Forgings Bars and forgings shall meet the requirements of 3.5.1.2.1, 3.5.1.2.2, and 3.5.1.2.3 after being maraged by heating within the range 900 to 950 F (482 to 510 C), holding at the selected temperature within 10 F (6 C) for not less than 5 hours, and cooling in
25、air. 3.5.1.2.1 Tensile Properties Shall be as shown in Table 3. TABLE 3A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITS Nominal Diameter or Least Distance Between Parallel Sides Inches Tensile Strengthksi YieldStrengthat 0.2% Offset ksi Elongation in 4D %Reductionof Area %0.500 to 2.000, incl 190 18
26、0 12 60 Over 2.000 to 4.000, incl 190 175 12 60 Over 4.000 to 8.000, incl 190 170 10 50 TABLE 3B - MINIMUM TENSILE PROPERTIES, SI UNITS Nominal Diameter or Least Distance Between Parallel Sides MillimetersTensile StrengthMPaYieldStrengthat 0.2% Offset MPaElongation in 4D %Reductionof Area %12.70 to
27、50.80, incl 1310 1241 12 60 Over 50.80 to 101.60, incl 1310 1207 12 60 Over 101.60 to 203.20, incl 1310 1172 10 50 Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS6543E Page 5 of 8 3.5.1.2.1 I
28、mpact Strength Shall be as shown in Table 4. TABLE 4A - IMPACT STRENGTH, INCH/POUND UNITS Nominal Diameter or Least Distance Between Parallel Sides Inches Charpy V-Notch at 0 F foot-pounds 0.500 to 2.000, incl 60 Over 2.000 to 4.000, incl 50 Over 4.000 to 8.000, incl 40 TABLE 4B - IMPACT STRENGTH, S
29、I UNITS Nominal Diameter or Least Distance Between Parallel Sides MillimetersCharpy V-Notch at -18 C Joules 12.70 to 50.80, incl 81.3 Over 50.80 to 101.60, incl 67.8 Over 101.60 to 203.20, incl 54.2 3.5.1.2.2 Fracture Toughness When Specified Acceptance criteria and method of test shall be as establ
30、ished by purchaser. 3.6 Quality The product, 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 product. 3.6.1 Bars ordered hot rolled or cold drawn or ground, turned, or polished, shall, afte
31、r removal of the standard stock removal allowance in accordance with AS1182, be free from seams, laps, tears, and cracks open to the ground, turned, or polished surface. 3.6.2 All product shall be inspected ultrasonically in accordance with AMS2630 and shall meet Class AA quality requirements as def
32、ined therein. Hot-finished surfaces shall be suitably prepared prior to ultrasonic inspection. 3.6.3 Grain flow of die forgings, except in areas that contain flash-line end grain, shall follow the general contour of the forgings showing no evidence of reentrant grain flow. 3.7 Tolerances Bars shall
33、conform to all applicable requirements of AMS2251. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of the product 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
34、perform any confirmatory testing deemed necessary to ensure that the product conforms to specified requirements. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS6543E Page 6 of 8 4.2 Classific
35、ation of Tests 4.2.1 Acceptance Tests Tests for the following requirements are acceptance tests and shall be performed on each heat or lot as applicable: 4.2.1.1 Composition (3.1) and macrostructure (3.5.1.1.1) of each heat. 4.2.1.2 Hardness (3.3.1) of each lot of bars and forgings as solution heat
36、treated. 4.2.1.3 Ultrasonic quality (3.6.2) of each bar and forging as solution heat treated. 4.2.1.4 Tensile properties (3.5.1.2.1) and impact strength (3.5.1.2.2) of each lot of bars and forgings after maraging. 4.2.1.5 Fracture toughness, when specified, (3.5.1.2.3) of each lot of bars and forgin
37、gs after maraging. 4.2.1.6 Tolerances (3.7) of bars. 4.2.2 Periodic Tests The test for grain flow of die forgings (3.6.3) is a periodic test and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser. 4.3 Sampling and Testing 4.3.1 Bars and For
38、ging Stock In accordance with AMS2370. 4.3.2 Forgings In accordance AMS2372. 4.4 Reports 4.4.1 The vendor of bars and forgings shall furnish with each shipment a report showing the results of tests for composition and macrostructure of each heat and for condition of each lot and ultrasonic quality o
39、f each piece as solution heat treated, and for tensile and impact properties after maraging of each lot, and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, heat and lot numbers, AMS6543E, product form and size (and/or part
40、number if applicable), and quantity. If forgings are supplied, the size and melt source of stock used to make the forgings shall also be included. 4.4.2 Report the nominal metallurgically worked cross sectional size and the cut size, if different (See 3.3.1). 4.4.3 The vendor of forging stock shall
41、furnish with each shipment a report showing the results of tests for composition, and macrostructure for each heat and the results of any additional property requirements imposed by 8.6. This report shall include the purchase order number, heat number, AMS6543E, size and quantity. 4.5 Resampling and
42、 Retesting 4.5.1 Bars and Forging Stock In accordance with AMS2370. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS6543E Page 7 of 8 4.5.2 Forgings In accordance with AMS2372. 5. PREPARATION
43、FOR DELIVERY 5.1 Sizes Except when exact lengths or multiples of exact lengths are ordered, straight bars will be acceptable in mill lengths of 6 to 20 feet (1.8 to 6.1 m) but not more than 10% of any shipment shall be supplied in lengths shorter than 10 feet (3 m). 5.2 Identification 5.2.1 Bars In
44、accordance with AMS2806. 5.2.2 Forgings In accordance with AMS2808. 5.2.3 Forging Stock As agreed upon by purchaser and vendor. 5.3 Protective Treatment Bars ordered cold-drawn, cold-rolled, ground, turned, or polished shall be protected from corrosion prior to shipment. 5.4 Packaging The product sh
45、all 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 vendor shall include this specifica
46、tion 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 A change bar (l) located in the left margin is for the con
47、venience 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 bars and (R) are not us
48、ed in original publications, nor in documents that contain editorial changes only. 8.2 Hardness conversion tables for metals are presented in ASTM E 140. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS6543E Page 8 of 8 8.3 The temperature of the agitated-water quenching bath is an important factor in the development of adequate mechanical properties. Quenching water temperature of not over 70 F
