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/AMS6511AAEROSPACEMATERIALSPECIFICATIONAMS6511 REV. AIssued 2008-02Revised 2012-07Superseding AMS6511Steel
5、, Maraging, Bars, Forgings, Tubing, and Rings18Ni -8.5Co -3.2Mo -0.20Ti -0.10AlDouble Vacuum Melted, Annealed(Composition similar to UNS K92710)RATIONALEAMS6511A results from a Five Year Review and update of this specification.1. SCOPE1.1 FormThis specification covers a premium aircraft-quality stee
6、l 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 200 ksi (1379 MPa) and where such parts may
7、 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 revision
8、 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.SAE AMS6511A Page 2 of 82.1 SAE PublicationsAvailable from SAE International, 400 Common
9、wealth Drive, 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 AlloysAMS2251 Tolerances, Low-Alloy
10、Steel BarsAMS2253 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 StockAMS2372 Quality Assurance Sampling and Te
11、sting, 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 SteelsAS1182 S
12、tandard Stock Removal Allowance, Aircraft-Quality and Premium Aircraft-Quality Steel Bars and Mechanical Tubing2.2 ASTM PublicationsAvailable 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 Testing
13、 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-Nickel-Ir
14、on Alloys3. TECHNICAL REQUIREMENTS3.1 CompositionShall 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.SAE AMS6511A Page 3 of 8TABLE 1 - COMPOSI
15、TIONElement min maxCarbon - 0.03Manganese - 0.10Silicon - 0.10Phosphorus - 0.010Sulfur - 0.010Nickel 17.00 19.00Cobalt 8.00 9.00Molybdenum 3.00 3.50Titanium 0.15 0.25Aluminum 0.05 0.15Chromium - 0.50Copper - 0.503.1.1 Any additions of calcium, zirconium, and boron shall be made prior to pouring; the
16、se elements 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 AnalysisComposition variations shall meet the applicable requirements of AMS2248.3.2 Melting PracticeSteel shall be produced by multiple melting using vacuum ind
17、uction melting process in the initial melt and consumable electrode vacuum practice in the final melt (VIM VAR).3.3 ConditionThe product shall be supplied in the following condition:3.3.1 Bars, Forgings, Mechanical Tubing, and Flash Welded RingsAnnealed and descaled. Bars shall not be cut from plate
18、 (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 RingsAs ordered by the forging or flash welded ring manufacturer.
19、3.4 AnnealingBars, 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 other atmosphere at
20、a rate equivalent to an air cool or faster. Pyrometry shall be in accordance with AMS2750.3.5 PropertiesThe product shall conform to the following requirements; hardness and tensile testing shall be performed in accordance with ASTM A 370:SAE AMS6511A Page 4 of 83.5.1 MacrostructureVisual examinatio
21、n of 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 wo
22、rse 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 specifi
23、ed by purchaser, in which case the purchaser shall specify standards to be used.3.5.2 Micro-Inclusion Rating of Each HeatNo 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 1.5 1.5 2.0 3.0Heavy
24、 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 32 HRC, or equivalent (See
25、8.2).3.5.4 Average Grain Size of Bars, Forgings, Mechanical Tubing, and Flash Welded RingsProduct 6.0 Inches (152.4 mm) and under in Nominal Section Thickness shall be ASTM No. 5 or finer, determined in accordance with ASTM E 112.3.5.5 Response to Maraging Heat TreatmentSpecimens shall have the foll
26、owing properties after being maraged by heating to 900 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 TENSILE PROPERTIES, INCH/POUND UNITS (1)NominalSection ThicknessInchesSpecimenOrientation
27、TensileStrengthksiYield Strengthat 0.2% OffsetksiElongationin 4D%Reductionof Area%Up to 6.000, excl Longitudinal 205 200 8.0 50Transverse 205 200 8.0 40SAE AMS6511A Page 5 of 8TABLE 4B - MINIMUM TENSILE PROPERTIES, SI UNITS (1)NominalSection ThicknessMillimetersSpecimenOrientationTensileStrengthMPaY
28、ield Strengthat 0.2% OffsetMPaElongationin 4D%Reductionof Area%Up to 152.40, excl Longitudinal 1413 1379 8.0 50Transverse 1413 1379 8.0 40(1)(See 8.3)3.5.5.2 HardnessShall be not lower than 42 HRC, or equivalent (See 8.2), but the product shall not be rejected on the basis of hardness if the tensile
29、 property requirements are acceptable, determined on specimens taken from the same sample as that with nonconforming hardness or from another sample with similar nonconforming hardness.3.5.6 Forging StockWhen a sample of stock is forged to a test coupon and heat treated as in 3.4 and 3.5.5, specimen
30、s taken from the heat treated coupon shall conform 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 St
31、ock for Flash Welded RingsSpecimens taken from the stock after heat treatment as in 3.4 and 3.5.5 shall conform to the requirements of 3.5.5.1and 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 imper
32、fections detrimental to usage of the product.3.6.1 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
33、 free from seams, laps, tears, and cracks open 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
34、that contain flash-line end grain, shall follow 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.SAE AMS6511A Page 6 of 84. QUALITY ASSURANCE PROVISIONS4.1 Responsibili
35、ty for InspectionThe 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 perform any confirmatory testing deemed necessary to ensure that the product conforms to specified r
36、equirements.4.2 Classification of Tests4.2.1 Acceptance TestsComposition (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
37、 be performed on each heat or lot as applicable.4.2.2 Periodic TestsFrequency-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
38、 and Testing4.3.1 Bars, Mechanical Tubing, Flash Welded Rings, and Stock for Forging or Flash Welded RingsIn accordance with AMS2370.4.3.2 ForgingsIn accordance with AMS2372.4.4 Reports4.4.1 The vendor of bars, forgings, tubing and flash welded rings shall furnish with each shipment a report showing
39、 the results of tests for composition, 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
40、 purchase order number, heat and lot numbers, AMS6511A, 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,
41、report the nominal metallurgically worked 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 hea
42、t treatment of each heat. This report shall include the purchase order number, heat number, AMS6511A, size and quantity.4.5 Resampling and Retesting4.5.1 Bars, Mechanical Tubing, Flash Welded Rings, and Stock for Forging or Flash Welded RingsIn accordance with AMS2370.4.5.2 ForgingsIn accordance wit
43、h AMS2372.SAE AMS6511A Page 7 of 85. PREPARATION FOR DELIVERY5.1 SizesExcept 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 sho
44、rter than 10 feet (3 m).5.2 Identification5.2.1 Bars and Mechanical TubingIn accordance with AMS2806.5.2.2 ForgingsIn accordance with AMS2808.5.2.3 Flash Welded Rings and Stock for Forging or Flash Welded RingsAs agreed upon by purchaser and vendor.5.3 Protective TreatmentBars, mechanical tubing, an
45、d flash welded rings ordered ground, turned, or polished shall be protected from corrosion prior to shipment.5.4 PackagingThe product shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the handling, packaging, a
46、nd transportation of the product to ensure carrier acceptance and safe delivery.6. ACKNOWLEDGMENTA vendor shall include this specification number and its revision letter in all quotations and when acknowledging purchase orders.7. REJECTIONSProduct not conforming to this specification, or to modifica
47、tions authorized by purchaser, 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
48、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 ASTM E 140.SAE AMS6511A Page
49、8 of 88.3 The yield strength and elongation values shown in Table 4 were taken from MIL-S-46850 Revision D, Grade 200 and the tensile values are from industry practice. These properties have not been substantiated by AMS statistical procedures.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 an
