1、AEROSPACE MATERIAL SPECIFICATIONAMS4937 REV. DIssued 1992-07Revised 2014-10Superseding AMS4937CTitanium Alloy, Extrusions and Flash Welded Rings6Al - 6V - 2SnBeta Extruded Plus Annealed, Heat Treatable(Composition similar to UNS R56620)RATIONALEAMS4937D results from a Five Year Review and update of
2、this specification to agreement of testing material outside the sizes of 1.1 (3.5.1.1.1.2), revise melting to restrct subsequent melting to VAR (3.2), add AMS2368 to sampling, the addition of AS6279 (3.8) and revise reporting (4.4).1. SCOPE1.1 FormThis specification covers a titanium alloy in the fo
3、rm of extruded bars, tubes, and shapes, and of flash welded rings upthrough 4.00 inches (101.6 mm) in diameter or least distance between parallel sides and stock for flash welded rings.1.2 ApplicationThese products have been used typically for parts requiring high strength up to 750 F (399 C), parti
4、cularly those parts machined and/or flash-butt welded in the annealed condition with the option of subsequent solution and precipitation heat treatment, but usage is not limited to such applications.1.2.1 Certain processing procedures and service conditions may cause these products to become subject
5、 to stress-corrosion cracking; ARP982 recommends practices to minimize such conditions.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 revi
6、sion 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, Warren
7、dale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.AMS2245 Tolerances, Titanium and Titanium Alloy Extruded Bars, Rods, and ShapesAMS2249 Chemical Check Analysis Limits, Titanium and Titanium Alloys_SAE Technical Standards Board Rules provide th
8、at: “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 therefrom, is the sole responsibility of the user.”SA
9、E 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 2014 SAE InternationalAll rights reserved. No part of this publication may be reproduced, stored in a retrieval
10、 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: 724-776-0790Email: CustomerServic
11、esae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS4937DSAE INTERNATIONAL AMS4937D Page 2 of 7AMS2368 Sampling and Testing of Wrought Titanium Raw Material, Except Forgings and Forging Sto
12、ckAMS2750 PyrometryAMS2809 Identification, Titanium and Titanium Alloy Wrought ProductsAMS7498 Rings, Flash Welded, Titanium and Titanium AlloysARP982 Minimizing Stress-Corrosion Cracking in Wrought Titanium Alloy ProductsAS6279 Industry Standard Practices for Production, Distribution, and Procureme
13、nt of Metal Stock2.2 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 E 8 / E 8MTension Testing of Metallic MaterialsASTM E 1409 Determination of Oxygen and Nitrogen in Titanium and Titani
14、um Alloys by the Inert Gas FusionASTM E 1447 Determination of Hydrogen in Titanium and Titanium Alloys by the Inert Gas Fusion/Thermal Conductivity/Infrared Detection MethodASTM E 1941 Determination of Carbon in Refractory and Reactive Metals and Their Alloys by Combustion AnalysisASTM E 2371 Analys
15、is of Titanium and Titanium Alloys by Direct Current Plasma and Inductively Coupled Plasma Atomic Emission Spectrometry3. TECHNICAL REQUIREMENTS3.1 CompositionShall conform to the percentages by weight shown in Table 1; carbon shall be determined in accordance with ASTM E 1941, hydrogen in accordanc
16、e with ASTM E 1447, oxygen and nitrogen in accordance with ASTM E 1409, and other elements in accordance with ASTM E 2371. Other analytical methods may be used if acceptable to the purchaser. TABLE 1 - COMPOSITIONElement min maxAluminumVanadiumTinIronCopperOxygenCarbonNitrogenHydrogen Yttrium (3.1.1
17、)Residual Elements, each (3.1.1) Residual Elements, total (3.1.1)Titanium5.005.001.500.350.35-remainder6.00 6.00 2.50 1.00 1.00 0.200.050.04 (400 ppm)0.015 (150 ppm)0.005 ( 50 ppm)0.10 0.40 3.1.1 Determination not required for routine acceptance.3.1.2 Check AnalysisComposition variations shall meet
18、the applicable requirements of AMS2249. SAE INTERNATIONAL AMS4937D Page 3 of 73.2 Melting PracticeAlloy shall be multiple melted. The first melt shall be made by vacuum consumable electrode, nonconsumable electrode, electron beam cold hearth, or plasma arc cold hearth melting practice. The subsequen
19、t 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 shall be argon and/or helium at an absolute pressure not higher than 1000 mm of
20、mercury.3.2.2 The electrode tip for nonconsumable electrode melting shall be water-cooled copper.3.3 ConditionThe product shall be supplied in the following condition:3.3.1 Bars, Tubes, and ShapesExtruded, annealed, straightened and detwisted as required, and descaled.3.3.1.1 Extrusions may be desca
21、led by wet or dry abrasive blasting, by chemical procedures, or by other methods acceptable to purchaser.3.3.2 Flash Welded RingsFabricated in accordance with AMS7498 and annealed.3.3.3 Stock for Flash Welded RingsAs ordered by the flash welded ring manufacturer.3.4 Heat TreatingAt the option of the
22、 extrusion manufacturer, straightening and detwisting operations may be performed in conjunction with annealing. Pyrometry shall be in accordance with AMS2750.3.4.1 AnnealingExtruded shapes and flash welded rings shall be annealed by heating to a temperature within the range 1300 to 1500 F (704 to 8
23、16 C), holding at the selected temperature within 25 F (14 C) for 2 hours 0.25, and cooling to room temperature.3.4.2 Stress-RelievingWhen specified by purchaser, extruded shapes and flash welded rings shall be stress-relieved after any forming operation performed below 1050 F (566 C) for dimensiona
24、l control, sizing, or proof testing. Product shall be stress-relieved by heating to a temperature within the range 900 to 1100 F (482 to 593 C), holding at the selected temperature within 25 F (14 C) for 2 to 4 hours, and cooling in air.3.5 PropertiesThe product shall conform to the following requir
25、ements:3.5.1 Bars, Tubes, Shapes, and Flash Welded RingsProduct 4.00 inches (101.6 mm) and under in nominal diameter or least distance between parallel sides shall have the following properties: SAE INTERNATIONAL AMS4937D Page 4 of 73.5.1.1 As Annealed, Formed, or Formed and Stress-Relieved3.5.1.1.1
26、 Tensile PropertiesShall be as shown in Table 2, determined in accordance with ASTM E 8 / E 8M 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 strain.TABLE 2A - T
27、ENSILE PROPERTIES, INCH/POUND UNITS Nominal Diameter or LeastDistance Between Parallel SidesInchesTensileStrengthksi, minYield StrengthAt 0.2% OffsetksiElongationin 4D%, minLElongationin 4D%, minLTReductionof Area%, minLReductionof Area%, minLTUp to 3.00, inclOver 3.00 to 4.00, incl145140135 to 1601
28、30 to 15510108820201515TABLE 2B - TENSILE PROPERTIES, SI UNITS Nominal Diameter or Least Distance Between Parallel SidesMillimetersTensileStrengthMPa, minYield Strengthat 0.2% OffsetMPaElongationin 4D%, minLElongationin 4D%, minLTReductionof Area%, minLReductionof Area%, minLTUp to 76.2, inclOver 76
29、.2 to 101.6, incl1000965931 to 1103896 to 1069101088202015153.5.1.1.1.1 Tensile properties requirements apply in both longitudinal and long-transverse directions but transverse properties need be determined only on product that a transverse tensile specimen not less than 2.50 inches (63.5 mm) in len
30、gth can be obtained (See 8.3).3.5.1.1.1.2 Mechanical property requirements for product outside the range covered by Table 2 shall be agreed upon between purchaser and producer (Also see 4.4.3).3.5.1.1.2 Surface ContaminationExcept as permitted by 3.5.1.1.2.1, extrusions shall be free of any oxygen-r
31、ich layer, such as alpha-case, or any other surface contamination, determined by microscopic examination at not lower than 400X magnification or other method agreed upon by purchaser and vendor.3.5.1.1.2.1 When permitted by purchaser, extrusions to be machined all-over may have an oxygen-rich layer
32、provided such layer is removable within the machining allowance on the extrusion.3.5.1.1.3 MicrostructureShall be essentially that resulting from beta processing. Microstructure shall not be cause for rejection unless standards have been agreed upon by purchaser and vendor.3.5.1.2 After Solution and
33、 Precipitation Heat TreatmentProduct shall have the following properties after being solution heat treated by heating to 1650 F 25 (899 C 14), holding at heat for 1 hour 0.1, and quenching in agitated oil or water, and precipitation heat treated by heating to 1050 F 15 (566 C 8), holding at heat for
34、 4 hours 0.25, and cooling in air.3.5.1.2.1 Tensile PropertiesShall be as shown in Table 3, determined as in 3.5.1.1.1 and 3.5.1.1.1.1.SAE INTERNATIONAL AMS4937D Page 5 of 7TABLE 3A - TENSILE PROPERTIES, INCH/POUND UNITSNominal Diameter or LeastDistance Between Parallel SidesInchesTensileStrengthksi
35、, minYield Strengthat 0.2% OffsetksiElongationin 4D%, minLElongationin 4D%, minLTReductionof Area%, minLReductionof Area%, minLTUp to 2.00, inclOver 2.00 to 4.00, incl150145140 to 165135 to 16010108820201515TABLE 3B - TENSILE PROPERTIES, SI UNITSNominal Diameter or Least Distance Between Parallel Si
36、desMillimetersTensileStrengthMPa, minYield Strengthat 0.2% OffsetMPaElongationin 4D%, minLElongationin 4D%, minLTReductionof Area%, minLReductionof Area%, minLTUp to 50.8, inclOver 50.8 to 101.6, incl10341000965 to 1138931 to 1103101088202015153.5.2 Stock for Flash Welded RingsSpecimens taken from t
37、he stock after heat treatment as in 3.4 shall meet the requirements of 3.5.1.1.1 and, after further heat treatment as in 3.5.1.2, shall meet the requirements of 3.5.1.2.1.3.6 QualityThe product, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materia
38、ls and from imperfections detrimental to usage of the product.3.7 TolerancesExtrusions shall conform to all applicable requirements of AMS2245.3.8 Production, distribution, and procurement of metal stock shall comply with AS6279. This requirement becomes effective April 1, 2016.4. QUALITY ASSURANCE
39、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 to perform any confirmatory testing deemed necessary to ensure that the produ
40、ct 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) of each heat.4.2.1.2 Hydrogen content (3.1), tensile properties (3.5.1.1), surface
41、 contamination (3.5.1.1.2), microstructure (3.5.1.1.3), and quality (3.6) of each lot of bars, tubes, shapes, and flash welded rings in the annealed, formed, or formed and stress relieved condition.4.2.1.3 Tolerances (3.7) of extrusions.SAE INTERNATIONAL AMS4937D Page 6 of 74.2.2 Periodic TestsTensi
42、le properties (3.5.1.2.1) after solution and precipitation heat treatment and tests of stock for flash welded rings to demonstrate ability to develop specified properties (3.5.2) are periodic tests and shall be performed at a frequency selected by the vendor unless frequency of testing is specified
43、by purchaser.4.3 Sampling and TestingShall be in accordance with AMS2368 and the following; a lot shall be all product of the same nominal size from the same heat processed at the same time.4.3.1 For Acceptance Tests4.3.1.1 CompositionOne sample from each heat, except that for hydrogen determination
44、s one sample from each lot, obtained after thermal and chemical processing is completed.4.3.1.2 Tensile PropertiesOne or more sample(s) from each lot.4.3.1.2.1 Tensile specimens shall be taken from the center of the cross-section of the predominant or thickest portion of product 1.50 inches (38.1 mm
45、) and under in nominal diameter or distance between parallel sides. Tensile specimens shall be taken midway between center and surface of product over 1.50 inches (38.1 mm) in nominal diameter or distance between parallel sides.4.3.1.3 Surface Contamination and MicrostructureOne or more sample(s) fr
46、om each lot.4.3.2 For Periodic TestsSpecimens for tensile tests (3.5.1.2.1), when performed, shall be taken as in 4.3.1.2.1.4.4 Reports4.4.1 The producer shall provide report showing producer identity, country where the metal was melted (i.e., final melt in the case of metal processed by multiple me
47、lting operations), results of tests for composition of each heat and for the hydrogen content and tensile properties 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 numbers, AMS4937D, product for
48、m and size or part number, specific annealing or stress relieving treatment used, and quantity.4.4.2 Report the nominal metallurgically worked cross sectional size and the cut size, if different.4.4.3 When the product size is outside the range covered by Table 2, the report shall contain a statement
49、 to that effect.4.5 Resampling and RetestingIf any specimen used in the above tests fails to meet specified requirements, disposition of the product may be based on the results of testing three additional specimens for each original nonconforming specimen. Failure of any retest specimen to meet specified requirements shall be cause for rejection of the product represented. Results of all tests
