1、AEROSPACE MATERIAL SPECIFICATION AMS6932 REV. B Issued 2004-01 Revised 2015-01 Superseding AMS6932A Titanium Alloy Bars, Forgings and Forging Stock 6.0Al 4.0V Extra Low Interstitial Annealed (Composition Similar to UNS R56401) RATIONALE AMS6932B results from a Five Year Review and update of this spe
2、cification that includes the removal of sample size allowance for hydrogen of Table 1 (covered by ASTM E1447), requires agreement on mechanical property values for material outside specification ranges (3.5.1.1.5 and 8.7), the addition of AS6279 (3.8) and revises the report paragraph (4.4). 1. SCOPE
3、 1.1 Form This specification covers a titanium alloy in the form of bars up through 3.000 inches (76.20 mm) in nominal diameter or least distance between parallel sides, inclusive, forgings of thickness up through 3.000 inches (76.20 mm), inclusive, with bars and forgings having a maximum cross-sect
4、ional area of 16 square inches (103.23 cm2), and stock for forging of any size. 1.2 Application These products have been used typically for parts requiring good weldability and ductility, combined with good notch-toughness down to -320 F (-196 C), but usage is not limited to such applications. 1.2.1
5、 Certain processing procedures and service conditions may cause these products to become subject to stress-corrosion cracking; ARP982 recommends practices to minimize such conditions. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date of the purchase order forms a par
6、t 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 superseding document has been specified, the last published issue of that documen
7、t shall apply. _ 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 infringemen
8、t arising therefrom, is the sole responsibility of the user.” 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 2015 SAE International All rights reserved. No
9、 part of this publication may 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:
10、 +1 724-776-4970 (outside USA) 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/AMS6932B SAE INTERNATIONAL AMS6932B Page 2 of 8 2.1 SAE Publicatio
11、ns Available 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. AMS2241 Tolerances, Corrosion and Heat-Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Bars and Wire AMS2249 Chemica
12、l Check Analysis Limits, Titanium and Titanium Alloys AMS2368 Sampling and Testing of Wrought Titanium Raw Materials, Except Forging and Forging Stock AMS2631 Ultrasonic Inspection, Titanium and Titanium Alloy Bar and Billet AMS2643 Structural Examination of Titanium Alloys, Chemical Etch Inspection
13、 AMS2750 Pyrometry AMS2808 Identification, Forgings AMS2809 Identification, Titanium and Titanium Alloy Wrought Products ARP982 Minimizing Stress-Corrosion Cracking in Wrought Titanium Alloy Products AS6279 Industry Standard Practices for Production, Distribution, and Procurement of Metal Stock 2.2
14、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 E8 / E8M Tension Testing of Metallic Materials ASTM E539 Analysis of Titanium Alloys by X-Ray Fluorescence Spectrometry ASTM E1409 Determ
15、ination of Oxygen and Nitrogen in Titanium and Titanium Alloys by the Inert Gas Fusion Technique ASTM E1447 Determination of Hydrogen in Titanium and Titanium Alloys by the Inert Gas Fusion Thermal Conductivity/Infrared Detection Method ASTM E1941 Determination of Carbon in Refractory and Reactive M
16、etals and Their Alloys by Combustion Analysis ASTM E2371 Analysis of Titanium and Titanium Alloys by Direct Current Plasma and Inductively Coupled Plasma Atomic Emission Spectrometry 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1; carbon shall b
17、e determined in accordance with ASTM E1941, hydrogen in accordance with ASTM E1447, oxygen and nitrogen in accordance with ASTM E1409, and other elements in accordance with ASTM E539 or ASTM E2371. Other analytical methods may be used if acceptable to the purchaser. SAE INTERNATIONAL AMS6932B Page 3
18、 of 8 Table 1 - Composition Element min max Aluminum 5.50 6.50 Vanadium 3.50 4.50 Iron - 0.25 Oxygen - 0.13 Carbon - 0.08 Nitrogen - 0.05 (500 ppm) Hydrogen - 0.0125 (125 ppm) Yttrium (3.1.1) - 0.005 ( 50 ppm) Other Elements each (3.1.1) - 0.10 Other Elements, total (3.1.1) - 0.30 Titanium remainder
19、 3.1.1 Determination not required for routine acceptance. 3.1.2 Check Analysis Composition variations shall meet the applicable requirements of AMS2249. 3.2 Melting Practice Alloy shall be multiple melted. The first melt shall be made by vacuum consumable electrode, nonconsumable electrode, electron
20、 beam cold hearth, or plasma arc cold hearth melting practice. The subsequent melt or melts shall be made under vacuum using vacuum arc remelting (VAR) practice. Alloy additions are not permitted in the final melt cycle. 3.2.1 The atmosphere for nonconsumable electrode melting shall be vacuum or sha
21、ll be argon or helium at an absolute pressure not higher than 1000 mm of mercury. 3.2.2 The electrode tip for nonconsumable electrode melting shall be water-cooled copper. 3.3 Condition The product shall be supplied in the following condition: 3.3.1 Bars Hot finished with or without subsequent cold
22、reduction, annealed, and descaled. A machined or ground surface is permitted unless prohibited by the purchaser. The product shall be processed to the final thickness/diameter by metallurgical working operations prior to any straightening, dimensional sizing or surface finishing operations. Bar shal
23、l not be cut from plate. 3.3.2 Forgings Annealed and descaled. 3.3.3 Stock for Forging As ordered by the forging manufacturer. 3.4 Heat Treatment Bars and forgings shall be annealed at a temperature 1300 to 1450 F (704 to 788 C) holding at the selected temperature within 25 F (14 C) for a time comme
24、nsurate with section thickness and the heating equipment and procedure used, and cool at a rate equivalent to an air cool. Pyrometry shall be in accordance with AMS2750. SAE INTERNATIONAL AMS6932B Page 4 of 8 3.5 Properties The product shall conform to the following requirements: 3.5.1 Bars and Forg
25、ings 3.5.1.1 Tensile Properties Shall be as specified in Table 2, determined in accordance with ASTM E8 / E8M with the rate of strain set at 0.005 inch/inch/minute (0.005 mm/mm/minute) and maintained within a tolerance of 0.002 inch/inch/minute (0.002 mm/mm/minute) through the 0.2% offset yield stra
26、in. 3.5.1.1.1 Tensile property requirements apply in both the longitudinal and transverse directions. Transverse tensile properties of Table 2 apply only to product that a test specimen not less than 2.50 inches (63.5 mm) in length can be obtained. 3.5.1.1.2 Specimens for the longitudinal requiremen
27、ts in Table 2 shall be taken with the axis of the specimen within 15 degrees of parallel to the grain flow. 3.5.1.1.3 Yield strength and reduction of area requirements do not apply to product under 0.125 inch (3.18 mm) in nominal diameter. Table 2 - Minimum tensile properties (See 8.2) Nominal Diame
28、ter or Least Distance Between Parallel Sides Inch (mm) Tensile Strength ksi (MPa) Yield Strength At 0.2% Offset ksi (MPa) Elongation in 2 Inches (50.8 mm) or 4D, % Reduction of Area % Up to 1.500 (38.10) incl. 130 (896) 120 (827) 10 25 Over 1.500 (38.10) to 3.000 (76.20), incl. 125 (861) 115 (793) 1
29、0 20 3.5.1.1.4 Table 2 properties are limited to product with a maximum cross-sectional area of 16 square inches (103.23 cm2). 3.5.1.1.5 Mechanical property requirements for product outside the size range covered by 3.5.1.1.4 and Table 2 shall be agreed upon between purchaser and producer. 3.5.1.2 M
30、icrostructure Shall be that structure resulting from processing within the alpha-beta phase field. Microstructure shall conform to 3.5.1.2.1 or 3.5.1.2.2 (See 8.3). 3.5.1.2.1 Equiaxed and/or elongated primary alpha in a transformed beta matrix with no continuous network of alpha at prior beta grain
31、boundaries. 3.5.1.2.2 Essentially complete field of equiaxed and/or elongated alpha with or without intergranular beta and with no continuous network of alpha at prior beta grain boundaries. 3.5.1.3 Surface Contamination Except as specified in 3.5.1.3.1, the product shall be free of any oxygen-rich
32、layer (See 8.4), such as alpha case, or other surface contamination, determined by microscopic examination at not lower than 400X magnification or by other method agreed upon by purchaser and producer. 3.5.1.3.1 When permitted by purchaser, product to be machined all over may have an oxygen-rich lay
33、er, provided such layer is removable within the machining allowance on the product. SAE INTERNATIONAL AMS6932B Page 5 of 8 3.5.1.4 Macrostructure Product shall be uniform in quality and condition, homogenous, sound, and free from foreign materials and from internal imperfections detrimental to fabri
34、cation or performance of parts. 3.5.2 Forging Stock When a sample of stock is forged to a test coupon and heat treated as in 3.4, specimens taken from the heat treated coupon shall conform to the requirements of 3.5.1.1. If specimens taken from the stock after heat treatment as in 3.4 conform to the
35、 requirements of 3.5.1.1, the tests shall be accepted as equivalent to tests of a forged coupon. 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 Ultr
36、asonic Inspection Product 0.500 inch (12.70 mm) to 1.500 inches (38.10 mm) inclusive in nominal thickness, diameter or least distance between parallel sides shall meet Class A1 requirements of AMS2631. Product over 1.500 inches (38.10 mm) in nominal thickness, diameter or least distance between para
37、llel sides shall meet Class A requirements of AMS2631. 3.7 Tolerances Bars shall conform to all applicable requirements of AMS2241. 3.8 Production, distribution, and procurement of metal stock shall comply with AS6279. This requirement becomes effective June 01, 2016. 4. QUALITY ASSURANCE PROVISIONS
38、 4.1 Responsibility for Inspection The producer of the product shall supply all samples for producers 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 c
39、onforms to the specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests The following requirements are acceptance tests and shall be performed on each heat or lot as applicable. 4.2.1.1 Composition (3.1) of each heat. 4.2.1.2 Hydrogen content (3.1), tensile properties (3.5.1.1), mi
40、crostructure (3.5.1.2), surface contamination (3.5.1.3), and macrostructure (3.5.1.4) of each lot of bars and forgings. 4.2.1.3 Ultrasonic quality (3.6.1) of each bar, forging, or forging stock as required by 3.6.1. 4.2.1.4 Tolerances (3.7) of bars. 4.2.2 Periodic Tests Ability of forging stock (3.5
41、.2) to develop specified properties is a periodic test and shall be performed at a frequency selected by the producer unless frequency of testing is specified by purchaser. SAE INTERNATIONAL AMS6932B Page 6 of 8 4.3 Sampling and Testing Shall be in accordance with AMS2368 and as follows: A lot shall
42、 be all product of the same nominal size from the same heat processed at the same time. 4.3.1 For Acceptance Tests 4.3.1.1 Composition At least one sample from each heat, except that for hydrogen determinations, one sample from each lot obtained after all thermal and chemical processing is completed
43、. 4.3.1.2 Tensile Properties At least one sample from bars from each lot. The number, location, and orientation of samples from each lot of forgings shall be as agreed upon by purchaser and producer. 4.3.1.3 A specimen at least 0.5 inch (12.7 mm) long by full cross-section from each end of the bars
44、selected for sampling shall be macrostructurally examined for conformance to the quality requirements. Unless otherwise specified, macrostructural examination shall be performed in accordance with AMS2643. The number of bars selected for examination shall not be less than the amounts shown in Table
45、3. Table 3 - Number of bars selected for macrostructural examination Number of Bars in Lot Number of Bars Selected 1 to 15 1 16 to 50 2 51 to 150 3 151 to 500 5 over 500 4 + amount shown above over 500 4.4 Reports 4.4.1 The producer shall furnish with each shipment a report showing producer identity
46、, country where the metal was melted (e.g., final melt in the case of metal processed by multiple melting operations), the results of tests for composition of each heat and for the hydrogen content, tensile properties, microstructure, and surface contamination of each lot, ultrasonic quality, when r
47、equired, and state that the product conforms to the other technical requirements. The report shall include the purchase order number, heat and lot numbers, AMS6932B, product form and mill produced size (and/or part number, if applicable), specific annealing treatment used, and quantity. If forgings
48、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 When the product size is outside the range covered by 3.5.1.1.4 and Table 2, the re
49、port shall contain a statement to that effect. 4.4.4 The producer of stock for forging shall furnish with each shipment a report showing producer identity, country of origin and the results of tests for composition of each heat, hydrogen content of each lot and ultrasonic quality, when required. This report shall include the purchase order number, heat number, AMS6932B, size, and quantity 4.5 Resampling and Retesting Sh
