1、_ 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSRUWLVSX EOLVKHGE6$(WRDGYDQFHWKHVWDWHRIWHFKQLFDODQGHQJL neering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, LVWKHVROHUHVSRQ
2、VLELOLWRIWKHXVHU 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 2016 SAE International All rights reserved. No part of this publication may be reproduced,
3、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 USA) Fax: 724-776-0
4、790 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/AMS6543F AEROSPACE MATERIAL SPECIFICATION AMS6543 REV. F Issued 1975-09 Revised 2016-02 Superseding AMS6543E St
5、eel, 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 AMS6543F results from a Five Year Review and update of this specification that revises reporting. 1. SCOPE 1.1 Form
6、This specification 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 c
7、ombination 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
8、 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 apply. 2.1 SAE Publications Available from SAE International, 400 Common
9、wealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (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-
10、Alloy Steel Bars AMS2370 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel Wrought Products and Forging Stock SAE INTERNATIONAL $06 F Page 2 of 7 AMS2372 Quality Assurance Sampling and Testing Carbon and Low-Alloy Steel Forgings AMS2630 Inspection, Ultrasonic, Product Over 0.5 Inch
11、(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 Alloys AMS2808 Identification Forgings AS1182 Standard Stock Removal Allowance, Aircraft-Quality and Premium Aircraft-Quality St
12、eel 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: 610-832-9585, www.astm.org. ASTM A370 Mechanical Testing of Steel Products ASTM A604 Macroetch Testing of Consumable Electrode Remelted
13、 Steel Bars and Billets ASTM E353 Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron Alloys 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
14、E353, 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 0.25 Silicon - 0.10 Phosphorus - 0.010 Sulfur - 0.006 Chromium 1.80 2.20 Nickel 9.50 10.50 Cobalt 7.50 8.50 Molybdenum 0.90 1.10 Titanium -
15、0.015 Aluminum - 0.025 Oxygen - 0.0025 (25 ppm) Nitrogen - 0.0075 (75 ppm) 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 fo
16、llowed by vacuum consumable electrode remelting. SAE INTERNATIONAL $06 F Page 3 of 7 3.3 Condition The product shall be supplied in the following condition; hardness shall be determined in accordance with ASTM A370: 3.3.1 Bars Bar shall not be cut from plate (also see 4.4.2). Hot finished, solution
17、heat treated, and descaled, having hardness not lower than 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
18、 Bars and forgings shall be solution heat treated as in 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 accor
19、dance with AMS2750. 3.4.1 Product 2.0 Inches (51 mm) and Under in Nominal Section Thickness Shall be solution heat treated by heating in air to 1525 F 25 F (829 C 14 C) 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
20、to 1650 F 25 F (899 C 14 C), quenching, reheating to 1525 F 25 F (829 C 14 C), and quenching. 3.5 Properties The product shall conform to the following requirements; tensile and impact testing shall be performed in accordance with ASTM A370: 3.5.1 Bars and Forgings 3.5.1.1 As Solution Heat Treated 3
21、.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 A604, shall show no pipe or cracks. Porosity, segregation, inclusions, and other imperfections shall be no worse than the macro
22、graphs of ASTM A604 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 SAE INTERNATIONAL $06 F Page 4 of 7 3.5.1.2 Response to Heat Treatment (Maraging) for Bars and Forgings Bars and forgings shall meet the
23、 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 air. 3.5.1.2.1 Tensile Properties Shall be as shown in Table 3. Table 3A -
24、 Minimum tensile properties, inch/pound units Nominal Diameter or Least Distance Between Parallel Sides Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 4D % Reduction of Area % 0.500 to 2.000, incl 190 180 12 60 Over 2.000 to 4.000, incl 190 175 12 60 Over 4.000 to 8.000,
25、 incl 190 170 10 50 Table 3B - Minimum tensile properties, SI units Nominal Diameter or Least Distance Between Parallel Sides Millimeters Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 4D % Reduction of Area % 12.70 to 50.80, incl 1310 1241 12 60 Over 50.80 to 101.60, incl 1310
26、 1207 12 60 Over 101.60 to 203.20, incl 1310 1172 10 50 3.5.1.2.2 Impact 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,
27、 incl 50 Over 4.000 to 8.000, incl 40 Table 4B - Impact strength, SI units Nominal Diameter or Least Distance Between Parallel Sides Millimeters Charpy 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 3.5.1.2.3 Fracture Toughness When
28、 Specified Acceptance criteria and method of test shall be as established by purchaser. SAE INTERNATIONAL $06 F Page 5 of 7 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
29、 of the product. 3.6.1 Bars ordered hot rolled or cold drawn or machined, ground, turned, or polished, shall, after removal of the standard stock removal allowance in accordance with AS1182, be free from seams, laps, tears, and cracks open to the machined, ground, turned, or polished surface. 3.6.2
30、All product shall be inspected ultrasonically in accordance with AMS2630 and shall meet Class AA quality requirements as defined 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 gra
31、in, shall follow the general contour of the forgings showing no evidence of reentrant grain flow. 3.7 Tolerances Bars shall conform to all applicable requirements of AMS2251. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The producer of the product shall supply all samples for pr
32、oducers 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 product conforms to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Tests fo
33、r 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 treated. 4.2.1.3 Ultrasonic quality (3.6.2) of
34、 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 forgings after maraging. 4.2.1.6 Tolerances (3.7) of
35、 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 producer unless frequency of testing is specified by purchaser. 4.3 Sampling and Testing 4.3.1 Bars and Forging Stock In accordance with AMS2370. 4.3.2
36、 Forgings In accordance AMS2372. SAE INTERNATIONAL $06 F Page 6 of 7 4.4 Reports 4.4.1 The producer of bars and forgings 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 op
37、erations), results of tests for composition and macrostructure of each heat and for condition of each lot and ultrasonic quality of 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 requ
38、irements. This report shall include the purchase order number, heat and lot numbers, AMS6543F, product form and size (and/or part 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 nomina
39、l metallurgically worked cross sectional size and the cut size, if different (also see 3.3.1). 4.4.3 The producer of forging stock 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
40、melting operations), 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, AMS6543F, size and quantity. 4.5 Resampling and Retesting 4.5.1 Bars and F
41、orging Stock In accordance with AMS2370. 4.5.2 Forgings In accordance with AMS2372. 5. PREPARATION 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
42、shipment shall be supplied in lengths shorter than 10 feet (3 m). 5.2 Identification 5.2.1 Bars In accordance with AMS2806. 5.2.2 Forgings In accordance with AMS2808. 5.2.3 Forging Stock As agreed upon by purchaser and producer. 5.3 Protective Treatment Bars ordered cold-drawn, cold-rolled, ground,
43、turned, or polished shall be protected from corrosion prior to shipment. 5.4 Packaging The product 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 product to
44、 ensure carrier acceptance and safe delivery. SAE INTERNATIONAL $06 F Page 7 of 7 6. ACKNOWLEDGMENT A producer shall include this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Product not conforming to this specification, or to m
45、odifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 Revision Indicator 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
46、. 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 used in original publications, nor in documents that contain editorial changes only. 8.2 Hardness conversion tables for metals are presented in
47、ASTM E140. 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 (21 C) at the end of the quenching operation has been found to be satisfactory. 8.4 Terms used in AMS are clar
48、ified in ARP1917 and as follows: 8.4.1 Maraging The precipitation hardening treatment applied to a special group of iron base alloys to precipitate one or more intermetallic compounds in a matrix of essentially carbon-free martensite. 8.5 Dimensions and properties 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
