SAE AMS 6515A-2012 Steel Maraging Bars Forgings Tubing and Rings 18 5Ni - 12 0Co - 4 9Mo - 1 40Ti - 0 10Al Double Vacuum Melted Annealed (UNS K93540)《退火双重真空融解18 5Ni 12 0Co 4 9Mo 1 .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 theref

2、rom, 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 2012 SAE InternationalAll rights reserved. No part of this publication may b

3、e 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 USA)Fax

4、: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS6515AAEROSPACEMATERIALSPECIFICATIONAMS6515 REV. AIssued 2008-02Revised 2012-07Superseding AMS6515Steel

5、, Maraging, Bars, Forgings, Tubing, and Rings18.5Ni - 12.0Co - 4.9Mo - 1.40Ti - 0.10AlDouble Vacuum Melted, Annealed(Composition similar to UNS K93540)RATIONALEAMS6515A results from a Five Year Review and update of this specification.1. SCOPE1.1 FormThis specification covers a premium aircraft-quali

6、ty steel in the form of bars, forgings, mechanical tubing, flash welded rings, and stock for forging or flash welded rings.1.2 ApplicationThese products have been used typically for parts requiring through-hardening, without liquid quenching, to yield strength of 330 ksi (2275 MPa) and where such pa

7、rts may require welding during fabrication, but usage is not limited to such applications.2. APPLICABLE DOCUMENTSThe 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 subsequent r

8、evision 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 PublicationsAvailable from SAE International, 400 Commonwealth Drive, War

9、rendale, 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 AlloysAMS2251 Tolerances, Low-Alloy Steel BarsAMS2253

10、 Tolerances, Carbon and Alloy Steel TubingAMS2300 Steel Cleanliness, Premium Aircraft-Quality, Magnetic Particle Inspection ProcedureAMS2370 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel Wrought Products and Forging StockSAE AMS6515A Page 2 of 8AMS2372 Quality Assurance Sampling

11、 and Testing, Carbon and Low-Alloy Steel ForgingsAMS2750 PyrometryAMS2806 Identification, Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and AlloysAMS2808 Identification, ForgingsAMS7496 Rings, Flash Welded, Carbon and Low-Alloy SteelsA

12、S1182 Standard Stock Removal Allowance, Aircraft-Quality and Premium Aircraft-Quality Steel Bars and Mechanical Tubing2.2 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 A 370 Mechanical

13、 Testing of Steel ProductsASTM A 604 Macroetch Testing of Consumable Electrode Remelted Steel Bars and BilletsASTM E 45 Determining the Inclusion Content of SteelASTM E 112 Determining Average Grain SizeASTM E 353 Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-N

14、ickel-Iron Alloys3. 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 353, by spectrochemical methods, or by other analytical methods acceptable to purchaser.TABLE 1 - COMPOSITIONElement mi

15、n maxCarbon - 0.03Manganese - 0.10Silicon - 0.10Phosphorus - 0.010Sulfur - 0.010Nickel 18.00 19.00Cobalt 11.50 12.50Molybdenum 4.60 5.20Titanium 1.30 1.60Aluminum 0.05 0.15Chromium - 0.50Copper - 0.503.1.1 Any additions of calcium, zirconium, and boron shall be made prior to pouring; these elements

16、shall not exceed 0.05% calcium, 0.02% zirconium, and 0.003% boron but analysis for these elements need not be made.3.1.2 Check Analysis Composition variations shall meet the applicable requirements of AMS2248.SAE AMS6515A Page 3 of 83.2 Melting Practice Steel shall be produced by multiple melting us

17、ing vacuum induction melting process in the initial melt and consumable electrode vacuum practice in the final melt (VIM VAR).3.3 Condition The product shall be supplied in the following condition:3.3.1 Bars, Forgings, Mechanical Tubing, and Flash Welded Rings Annealed and descaled. Bars shall not b

18、e cut from plate (also see 4.4.2).3.3.1.1 Flash welded rings shall not be supplied unless specified or permitted on purchasers part drawing. When supplied, rings shall be manufactured in accordance with AMS7496.3.3.2 Stock for Forging or Flash Welded Rings As ordered by the forging or flash welded r

19、ing manufacturer.3.4 Annealing Bars, forgings, mechanical tubing, and flash welded rings shall be annealed by heating to a temperature within the range 1500 to 1700 F (816 to 927 C), holding at the selected temperature within 25 F (14 C) for 1 to 2 hours, and cooling to room temperature in air or ot

20、her atmosphere at a rate equivalent to an air cool or faster. Pyrometry shall be in accordance with AMS2750.3.5 Properties The product shall conform to the following requirements; hardness and tensile testing shall be performed in accordance with ASTM A 370:3.5.1 Macrostructure Visual examination of

21、 transverse full cross-sections from bars, billets, tube rounds (solid, not hollow), and stock for forging or flash welded rings, etched in hot hydrochloric acid in accordance with ASTM A 604, shall show no pipe or cracks. Porosity, segregation, inclusions, and other imperfections shall be no worse

22、than the macrographs of ASTM A 604 shown in Table 2.TABLE 2 - MACROSTRUCTUREClass Condition Severity1Freckles A2 White Spots A3 Radial Segregation B4 Ring Pattern B3.5.1.1 Macrostructure examination is not required for hollow tubes that are produced directly from ingots or blooms unless specified by

23、 purchaser, in which case the purchaser shall specify standards to be used.SAE AMS6515A Page 4 of 83.5.2 Micro-Inclusion Rating of Each Heat No specimen shall exceed the limits shown in Table 3, determined in accordance with ASTM E 45, Method D.TABLE 3 - MICRO-INCLUSION RATINGType A B C D EThin 1.5

24、1.5 1.5 2.0 3.0Heavy 1.0 1.0 1.0 1.5 1.53.5.2.1 Type E is titanium nitride and shall be rated in the same manner as Type B.3.5.3 Hardness of Bars, Forgings, Mechanical Tubing, and Flash Welded Rings as annealedBars, forgings, tubing, and flash welded rings shall have hardness not higher than 38 HRC,

25、 or equivalent (See 8.2).3.5.4 Average Grain Size of Bars, Forgings, Mechanical Tubing and Flash Welded RingsProduct 5.0 Inches (127.0 mm) and under in Nominal Section Thickness shall be ASTM No. 6 or finer, determined in accordance with ASTM E 112.3.5.5 Response to Maraging Heat TreatmentSpecimens

26、shall have the following properties after being maraged by heating to 950 F 10 (510 C 6), holding at heat for 3 to 6 hours, and cooling to room temperature:3.5.5.1 Tensile PropertiesShall be as shown in Table 4.TABLE 4A - MINIMUM LONGITUDINAL TENSILE PROPERTIES, INCH/POUND UNITS (1)NominalSection Th

27、icknessInchesSpecimenOrientationTensileStrengthksiYield Strengthat 0.2% OffsetksiElongationin 4D%Up to 5.000, incl Longitudinal 340 330 2.8TABLE 4B - MINIMUM LONGITUDINAL TENSILE PROPERTIES, SI UNITS (1)NominalSection ThicknessMillimetersSpecimenOrientationTensileStrengthMPaYield Strengthat 0.2% Off

28、setMPaElongationin 4D%Up to 127.00, incl Longitudinal 2344 2275 2.8(1)(See 8.3)3.5.5.2 HardnessShall be not lower than 56 HRC, or equivalent (See 8.2), but the product shall not be rejected on the basis of hardness if the tensile property requirements are acceptable, determined on specimens taken fr

29、om the same sample as that with nonconforming hardness or from another sample with similar nonconforming hardness.SAE AMS6515A Page 5 of 83.5.6 Forging StockWhen a sample of stock is forged to a test coupon and heat treated as in 3.4 and 3.5.5, specimens taken from the heat treated coupon shall conf

30、orm to the requirements of 3.5.5.1 and 3.5.5.2. If specimens taken from the stock after heat treatment as in 3.4 and 3.5.5 conform to the requirements of 3.5.5.1 and 3.5.5.2, the tests shall be accepted as equivalent to tests of a forged coupon.3.5.7 Stock for Flash Welded RingsSpecimens taken from

31、the stock after heat treatment as in 3.4 and 3.5.5 shall conform to the requirements of 3.5.5.1 and 3.5.5.2.3.6 QualityThe 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

32、.6.1 Steel shall be premium aircraft-quality conforming to AMS2300.3.6.2 Bars and mechanical tubing ordered hot rolled or cold drawn or 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

33、 to the ground, turned, or polished surface.3.6.3 Flash welded rings ordered ground, turned, or polished shall be free from seams, laps, tears, and cracks open to the ground, turned, or polished surfaces.3.6.4 Grain flow of die forgings, except in areas that contain flash-line end grain, shall follo

34、w the general contour of the forgings showing no evidence of reentrant grain flow.3.7 Tolerances3.7.1 BarsIn accordance with AMS2251.3.7.2 Mechanical TubingIn accordance with AMS2253.4. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for InspectionThe vendor of the product shall supply all samples fo

35、r 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 product conforms to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Compos

36、ition (3.1), macrostructure (3.5.1), micro-inclusion rating (3.5.2), annealed hardness (3.5.3), average grain size (3.5.4), tensile properties (3.5.5.1), maraged hardness (3.5.5.2), and tolerances (3.7) are acceptance tests and shall beperformed on each heat or lot as applicable.SAE AMS6515A Page 6

37、of 84.2.2 Periodic Tests Frequency-severity cleanliness rating (3.6.1), and grain flow of die forgings (3.6.4) are periodic tests 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, Mechanical Tubing

38、, Flash Welded Rings, and Stock for Forging or Flash Welded Rings In accordance with AMS2370.4.3.2 Forgings In accordance with AMS2372.4.4 Reports 4.4.1 The vendor of bars forgings, tubing and flash welded rings shall furnish with each shipment a report showing the results of tests for composition,

39、macrostructure, micro-inclusion rating, and tensile properties and hardness after marage heat treatment of each heat, and for average grain size 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 nu

40、mbers, AMS6515A, product form, 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 If the ship size/shape is cut from a larger cross section, report the nominal metallurgically worke

41、d size (See 3.3.1).4.4.3 The vendor of stock for forging and flash welded rings shall furnish with each shipment a report showing the results of tests for composition, macrostructure, micro-inclusion rating and tensile properties and hardness after marage heat treatment of each heat. This report sha

42、ll include the purchase order number, heat number, AMS6515A, size and quantity.4.5 Resampling and Retesting 4.5.1 Bars, Mechanical Tubing, Flash Welded Rings, and Stock for Forging or Flash Welded RingsIn accordance with AMS2370.4.5.2 ForgingsIn accordance with AMS2372.5. PREPARATION FOR DELIVERY 5.

43、1 Sizes Except when exact lengths or multiples of exact lengths are ordered, straight bars and tubing 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 and Mech

44、anical Tubing In accordance with AMS2806.SAE AMS6515A Page 7 of 85.2.2 Forgings In accordance with AMS2808.5.2.3 Flash Welded Rings and Stock for Forging or Flash Welded Rings As agreed upon by purchaser and vendor.5.3 Protective Treatment Bars, mechanical tubing, and flash welded rings ordered grou

45、nd, 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 applicablerules and regulations pertaining to the handling, packaging, and transportation of the product

46、to ensure carrier acceptance and safe delivery.6. ACKNOWLEDGMENT A vendor 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 modifications authorized by purchaser,

47、will be subject to rejection.8. NOTES8.1 A change bar (|) 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. An (R) symbol to the left of the document title indicates

48、 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 ASTM E 140.8.3 The yield strength and elongation values show

49、n in Table 4 were taken from MIL-S-46850 Revision D, Grade 350 and the tensile values are from industry practice. These properties have not been substantiated by the AMS statistical procedure. 8.4 Terms used in AMS are clarified in ARP1917.8.5 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 approxim