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/AMS6509AEROSPACEMATERIALSPECIFICATIONAMS6509Issued 2012-05Steel Bars and Forgings 3.5Cr 7.5Ni 16.3Co 1.75
5、Mo 0.2W (0.09-0.13C)Double Vacuum Melted, Normalized, Annealed(Composition similar to UNS K92731)RATIONALEAMS6509 is a new specification to cover premium aircraft-quality UNS K92731.1. SCOPE1.1 FormThis specification covers a premium aircraft-quality alloy steel in the form of bars, forgings, and fo
6、rging stock.1.2 ApplicationThese products have been used typically for carburized parts requiring high minimum core hardness with a narrow range, reduced distortion and subject to magnetic particle inspection standards, but usage is not limited to such applications.2. APPLICABLE DOCUMENTSThe issue o
7、f 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 of a document unless a specific document issue is specified. When the referenced document has been cancelled and no
8、superseding document has been specified, the last published issue of that document shall apply.2.1 SAE PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.AMS2251 Toleran
9、ces, Low-Alloy Steel BarsAMS2259 Chemical Check Analysis Limits, Wrought Low-Alloy and Carbon SteelsAMS2300 Steel Cleanliness, Premium Aircraft-Quality, Magnetic Particle Inspection ProcedureAMS2370 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel Wrought Products and Forging Stock
10、AMS2372 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel Forgings Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS6509 Page 2 of 7AMS2750 PyrometryAMS2806 Identification, Bar
11、s, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and AlloysAMS2808 Identification, ForgingsAS1182 Standard Stock Removal Allowance, Aircraft-Quality and Premium Aircraft-Quality Steel Bars and Mechanical Tubing2.2 ASTM PublicationsAvailable
12、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 of Steel ProductsASTM A 604 Macroetch Testing of Consumable Electrode Remelted Steel Bars and BilletsASTM E 45 Determining the Inclusion Cont
13、ent of SteelASTM E 112 Determining Average Grain SizeASTM E 350 Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought IronASTM E 399 Plane-Strain Fracture Toughness of Metallic Materials3. TECHNICAL REQUIREMENTS3.1 CompositionShall conform to the follo
14、wing percentages by weight shown in Table 1, determined by wet chemical methods in accordance with ASTM E 350, by spectrochemical methods, or by other analytical methods acceptable to purchaser.TABLE 1 - COMPOSITIONElement min maxCarbon 0.09 0.13Manganese - 0.1Silicon - 0.1Phosphorus - 0.008Sulfur -
15、 0.006Chromium 3.0 4.0Nickel 7.2 7.8Cobalt 15.5 17.0Molybdenum 1.5 1.9Tungsten 0.10 0.30Titanium - 0.045Aluminum - 0.1Vanadium - 0.06Oxygen - 0.0020 (20 ppm)Nitrogen - 0.0020 (20 ppm)3.1.1 Check AnalysisComposition variations shall meet the applicable requirements of AMS2259.Copyright SAE Internatio
16、nal Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS6509 Page 3 of 73.2 Melting PracticeSteel shall be multiple melted using vacuum induction melting followed by vacuum arc remelting.3.3 ConditionThe product shall be sup
17、plied in the following condition unless another condition is authorized by purchaser; hardness shall be determined in accordance with ASTM A 370:3.3.1 Bars and ForgingsNormalized, annealed (See 3.4), and descaled having hardness not higher than 352 HBW, or equivalent (See 8.2). Barshall not be cut f
18、rom plate. (Also see 4.4.2.)3.3.2 Forging Stock As ordered by the forging manufacturer.3.4 Heat TreatmentBars and forgings shall be normalized by heating to 1785 F 25 (974 C 14) for 60 minutes + 60, -0, cooling in air to room temperature and annealed by heating to 1255 F 25 (679 C 14) for not less t
19、han 2 hours, and cooling in air. 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 370:3.5.1 MacrostructureVisual examination of transverse full cross-sections
20、 from bars, billets, and stock for forging, flash welded rings, or extrusions, 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 than the macrographs of ASTM A 604 shown in Table 2
21、TABLE 2 - MACROSTRUCTURE LIMITSClass Condition Severity1Freckles A2 White Spots A3 Radial Segregation B4 Ring Pattern B3.5.2 Micro-Inclusion Rating of Each HeatNo specimen shall exceed the limits shown in Table 3, determined in accordance with ASTM E 45, Method A.TABLE 3 - MICRO-INCLUSION RATING LI
22、MITSType A B C DThin 1.5 1.5 1.5 1.5Thick 1.0 1.0 1.0 1.0Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS6509 Page 4 of 73.5.3 Response to Heat Treatment3.5.3.1 Bars and Forgings Test specimen
23、s from product 199 square inches (1284 cm2) and under in cross section shall conform to the following requirements after being austenitized by heating to 1830 F 25 (999 C 14), holding at heat for a time commensurate with section thickness, heating equipment, and procedure used, oil quenched (or equi
24、valent) to below 90 F (32 C) followed by cooling to -100 F (-73 C) or lower, holding at temperature for 1 hour +2, -0, warming in air to room temperature, and tempering at 925 F 10 (496 C 6) for 8 hours 2, and cooling in air (or equivalent).3.5.3.1.1 Tensile Properties3.5.3.1.1.1 Longitudinal tensil
25、e properties shall be as shown in Table 4. Testing in the longitudinal direction need not be performed on product qualified by testing in the transverse orientation.TABLE 4 - MINIMUM LONGITUDINAL TENSILE PROPERTIESProperty ValueTensile Strength 215 ksi (1482 MPa)Yield Strength 0.2% Offset 185 ksi (1
26、276 MPa)Elongation in 4D 13%Reduction of Area 60%3.5.3.1.1.2 Transverse tensile properties shall be as shown in Table 5. Transverse properties apply only to product from which tensile specimens not less than 1.625 inches (4.128 mm) in length can be taken.TABLE 5 - MINIMUM TRANSVERSE TENSILE PROPERTI
27、ESProperty ValueTensile Strength 215 ksi (1482 MPa)Yield Strength 0.2% Offset 185 ksi (1276 MPa)Elongation in 4D 11%Reduction of Area 50%3.5.3.1.2 HardnessShall not be lower than 45 HRC, or equivalent (See 8.2).3.5.3.1.3 Fracture ToughnessShall be not lower than 70 ksi inch (77MPa m ) KICor KQ, dete
28、rmined in accordance with ASTM E 399 on any product from which a specimen of a standardized ASTM E 399 orientation can be extracted having dimensions not less than 1.50 inches (38.1 mm) in section thickness and not less than 4.00 inches (101.6 mm) in width. Unless otherwise specified by the purchase
29、r, the product can be tested in either the longitudinal L-T or L-R orientation or transverse T-L or R-Lorientation.3.5.3.1.4 Average Grain Size of Bars and ForgingsShall be ASTM No. 5 or finer determined in accordance with ASTM E 112.3.5.3.2 Forging StockSpecimens extracted from a forged down test c
30、oupon subsequently heat treated as in 3.4 and 3.5.3 shall conform to the requirements of 3.5.3.1.1 and 3.5.3.1.2. If specimens taken from the unforged stock and subsequently heat treated as in 3.4 and 3.5.3 conform to the requirements of 3.5.3.1.1 and 3.5.3.1.2, the tests shall be accepted as equiva
31、lent to tests of a forged coupon.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS6509 Page 5 of 73.6 QualityThe product, as received by purchaser, shall be uniform in quality and condition, so
32、und, and free from foreign materials and from imperfections detrimental to usage of the product.3.6.1 Steel shall be premium aircraft-quality conforming to AMS2300.3.6.2 Product ordered hot finished or cold finished or ground, turned, or polished shall, after removal of the standard stock removal al
33、lowance in accordance with AS1182, be free from seams, laps, tears, and cracks open to the ground, turned, or polished surface.3.6.3 Grain flow of die forgings, except in areas that contain flash-line end grain, shall follow the general contour of theforgings showing no evidence of reentrant grain f
34、low.3.7 Tolerances3.7.1 Bars In accordance with AMS2251.4. QUALITY ASSURANCE PROVISIONS4.1 Responsibility 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
35、to perform any confirmatory testing deemed necessary to ensure that the product conforms to specified requirements.4.2 Classification of Tests4.2.1 Acceptance TestsThe following requirements are acceptance tests and shall be performed on each heat or lot as applicable:4.2.1.1 Composition (3.1), macr
36、ostructure rating (3.5.1), micro-inclusion rating (3.5.2) and response to heat treatment (tensile and hardness) (3.5.3) of each heat.4.2.1.2 Hardness maximum (3.3.1) of as-supplied normalized and annealed product of each lot of bars and forgings.4.2.1.3 Average grain size (3.5.3.1.4) of each lot of
37、bars and forgings after heat treatment.4.2.1.4 Tolerances (3.7) of bars.4.2.1.5 If forging stock, tests to demonstrate ability to develop required properties (3.5.3.2).4.2.2 Periodic TestsThe following requirements are periodic tests and shall be performed at a frequency selected by the vendor unles
38、s frequency of testing is specified by purchaser.4.2.2.1 Fracture toughness (3.5.3.1.3) of bars and forgings after heat treatment.4.2.2.2 Frequency-severity cleanliness rating (3.6.1).4.2.2.3 Grain flow of die forgings (3.6.3).Copyright SAE International Provided by IHS under license with SAENot for
39、 ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS6509 Page 6 of 74.3 Sampling and Testing4.3.1 Bars and Forging Stock In accordance with AMS2370.4.3.2 Forgings In accordance with AMS2372.4.4 Reports4.4.1 The vendor of bars and forgings shall furnish with each shipme
40、nt a report showing the results of tests for composition, macrostructure, micro-inclusion rating, and response to heat treatment (tensile properties and hardness) of each heat; annealed hardness and grain size of each lot, and stating that the product conforms to the other technical requirements. Th
41、is report shall include the purchase order number, heat and lot numbers, AMS6509, 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 If the ship size/shape is cut
42、from a larger cross section, report the nominal metallurgically worked size (See 3.3.1).4.4.3 The vendor of forging stock shall furnish with each shipment a report showing the results of tests for composition, macrostructure, micro-inclusion rating, and response to heat treatment (tensile properties
43、 and hardness). This report shall include the purchase order number, heat and lot numbers, AMS6509, product form and size or part number, and quantity.4.5 Resampling and Retesting4.5.1 Bars and Forging StockIn accordance with AMS2370.4.5.2 Forgings In accordance with AMS2372.5. PREPARATION FOR DELIV
44、ERY5.1 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 shorter than 10 feet (3 m).5.2 Identification5.2.1 Bars In ac
45、cordance with AMS2806.5.2.2 Forgings In accordance with AMS2808.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS6509 Page 7 of 75.2.3 Forging Stock As agreed upon by purchaser and vendor.5.3 P
46、rotective TreatmentBars 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
47、 and transportation of the product to ensure carrier acceptance and safe delivery.6. ACKNOWLEDGMENTA vendor shall include this specification number in all quotations and when acknowledging purchase orders.7. REJECTIONSProduct not conforming to this specification, or to modifications authorized by p
48、urchaser, will be subject to rejection.8. NOTES8.1 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. 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
