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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2015 SAE InternationalAll rights reserved. No part of this publi
3、cation 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: +1 724-776-4970 (out
4、side USA)Fax: 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/AMS4924HAEROSPACEMATERIAL SPECIFICATIONAMS4924 REV. HIssued 1965-09Revised 2015-08Superseding
5、 AMS4924GTitanium Alloy Bars, Forgings, and Rings-155Al - 2.5Sn, Extra Low InterstitialAnnealed(Composition similar to UNS R54521)RATIONALEAMS4924H results from a Five Year Review and update of this specification that includes the removal of sample size allowance for hydrogen of Table 1 (covered by
6、ASTM E1447), requires agreement on mechanical property values for material outside specification ranges (3.5.1.3 and 8.5), the addition of AS6279 (3.8), adds AMS2368 (4.3 and 4.5) and revises the report paragraph (4.5).1. SCOPE1.1 FormThis specification covers a titanium alloy in the form of bars, w
7、ire, forgings, flash welded rings 4.000 inches (101.60 mm) and under in nominal diameter or least distance between parallel sides, and stock for forging and flash welded rings of any size.1.2 ApplicationThese products have been used typically for parts requiring good weldability and high strength-to
8、-weight ratio operating from -250 to -423 F (-155 to -255 C), but usage is not limited to such applications. The room and elevated temperature strengths of this alloy are lower than those of AMS4926 and AMS4966.2. APPLICABLE DOCUMENTSThe issue of the following documents in effect on the date of the
9、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 superseding document has been specified, the last publi
10、shed 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 +1 724-776-4970 (outside USA), www.sae.org.AMS2241 Tolerances, Corrosion and Heat-Resistant Steel, Iron Alloy,
11、 Titanium, and Titanium Alloy Bars and WireAMS2249 Chemical Check Analysis Limits, Titanium and Titanium AlloysSAE INTERNATIONAL AMS4924H Page 2 of 9AMS2368 Sampling and Testing of Wrought Titanium Raw Material, Except Forgings and Forging StockAMS2375 Control of Forgings Requiring First Article App
12、rovalAMS2750 PyrometryAMS2808 Identification ForgingsAMS7498 Rings, Flash Welded, Titanium and Titanium AlloysAS6279 Production, Distribution, and Procurement of Metal Stock2.2 ASTM PublicationsAvailable from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959,
13、 Tel: 610-832-9585, www.astm.org.ASTM E8/E8M Tension Testing of Metallic MaterialsASTM E1409 Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by the Inert Gas Fusion TechniqueASTM E1447 Determination of Hydrogen in Titanium and Titanium Alloys by the Inert Gas Fusion Thermal Cond
14、uctivity/Infrared Detection MethodASTM E1941 Determination of Carbon in Refractory and Reactive Metals and Their Alloys by Combustion AnalysisASTM E2371 Analysis of Titanium and Titanium Alloys by Direct Current Plasma and Inductively Coupled PlasmaAtomic Emission Spectrometry3. TECHNICAL REQUIREMEN
15、TS3.1 CompositionShall conform to the percentages by weight shown in Table 1; carbon shall be 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 E2371. Other analytical method
16、s may be used if acceptable to the purchaser.Table 1 - CompositionElement min maxAluminumTinIronOxygenOxygen + IronCarbonNitrogenHydrogen Yttrium (3.1.1)Other Elements, each (3.1.1)Other Elements, total (3.1.1)Titanium4.702.00-remainder5.60 3.00 0.25 0.120.320.05 0.0350.01250.0050.050.40 (350 ppm)(1
17、25 ppm)( 50 ppm)SAE INTERNATIONAL AMS4924H Page 3 of 93.1.1 Determination not required for routine acceptance.3.1.2 Check AnalysisComposition variations shall meet the requirements of AMS2249 except that the check analysis limit for iron shall be 0.05 over maximum.3.2 Melting PracticeAlloy shall be
18、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 subsequent melt or melts shall be made under vacuum using vacuum arc remelting (VAR) practice. Alloy additions are not per
19、mitted in the final melt cycle.3.2.1 The atmosphere for nonconsumable electrode melting shall be vacuum or shall be inert gas at a 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 ConditionThe product shall be su
20、pplied in the following condition:3.3.1 BarsHot finished with or without subsequent cold reduction, annealed, and descaled. Bar shall be processed to the final thickness/diameter by metallurgical working operations prior to any straightening, dimensional sizing or surface finishing operations. Bar s
21、hall not be cut from plate.3.3.2 WireCold drawn, annealed, and descaled.3.3.3 Forgings and Flash Welded RingsAnnealed and descaled.3.3.3.1 Flash welded rings shall not be supplied unless specified or permitted on purchasers part drawing. Whensupplied, they shall be manufactured in accordance with AM
22、S7498.3.3.4 Stock for Forging or Flash Welded RingsAs ordered by the forging or flash welded ring manufacturer.3.4 AnnealingBars, wire, forgings, and flash welded rings shall be annealed by heating to a temperature within the range 1400 to 1500 F (760 to 815 C), holding at the selected temperature w
23、ithin 25 F (15 C) for not less than 1 hour, and cooling at a rate which will produce product meeting the requirements of 3.5. Pyrometry shall be in accordance with AMS2750.3.5 PropertiesThe product shall conform to the following requirements and shall also meet the requirements of 3.5.1.1 and 3.5.1.
24、2 after being heated to any temperature up to 1200 F (650 C) (See 4.2.2.1), held at heat for 30 minutes 3, cooled in air, and descaled.3.5.1 Bars, Wire, Forgings, and Flash Welded RingsSAE INTERNATIONAL AMS4924H Page 4 of 93.5.1.1 Tensile PropertiesShall be as specified in Table 2 and 3.5.1.2, deter
25、mined in accordance with ASTM E8/E8M on product 4.000 inches (101.60 mm) and under in nominal diameter or least distance between parallel sides, 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)
26、 through the 0.2% offset yield strain.Table 2A - Minimum tensile properties, inch/pound unitsNominal Diameteror Least DistanceBetween ParallelSidesInchesTensile StrengthksiYield Strengthat 0.2% OffsetksiElongationin 4D%Long.Elongationin 4D%L.T.Elongationin 4D%S.T.Reductionof Area%Long.Reductionof Ar
27、ea%L.T.Reductionof Area%S.T.Up to 2.000, inclOver 2.000 to 4.000, incl100100909010101010-620151515-10Table 2B - Minimum tensile properties, SI unitsNominal Diameteror Least DistanceBetween ParallelSidesMillimetersTensile StrengthMPaYield Strengthat 0.2% OffsetMPaElongationin 4D%Long.Elongationin 4D%
28、L.T.Elongationin 4D%S.T.Reductionof Area%Long.Reductionof Area%L.T.Reductionof Area%S.T.Up to 50.80, inclOver 50.80 to 101.60, incl69069062062010101010-620151515-10NOTE:Long. = LongitudinalL.T. = Long-TransverseS.T. = Short-Transverse3.5.1.1.1 Tensile and yield strength requirements apply in both lo
29、ngitudinal and transverse directions. Transverse tensile properties of Table 2 apply only to product from which a test specimen not less than 2.50 inch (6.25 mm) in length can be obtained. Tests in the transverse direction are not required on product tested in the longitudinal direction.3.5.1.1.2 Lo
30、ngitudinal requirements in Table 2 apply to wire, to specimens from bars and forgings taken with the axis approximately parallel to the grain flow and to specimens from flash welded rings taken in the circumferential direction.3.5.1.1.3 Yield strength and reduction of area requirements do not apply
31、to wire under 0.125 inch (3.00 mm) in diameteror least distance between parallel sides.3.5.1.2 Notched/Unnotched Tensile RatioWhen required by purchaser, the product shall exhibit a notched/unnotched tensile ratio of not less than 1.00, determined at -423 F 10 (-255 C 6) (See 8.4).3.5.1.3 Mechanical
32、 property requirements for product outside the size range covered by Table 2 shall be agreed upon between purchaser and producer.3.5.1.4 Surface ContaminationExcept as specified in 3.5.1.4.1 and 3.5.1.4.2, the product shall be free of any oxygen-rich layer, such as alpha case, or other surface conta
33、mination, determined by microscopic examination at not lower than 400X magnification or by other method agreed upon by purchaser and producer.3.5.1.4.1 An oxygen-rich layer not greater than 0.001 inch (0.02 mm) in depth will be permitted on bars other than rounds.SAE INTERNATIONAL AMS4924H Page 5 of
34、 93.5.1.4.2 When permitted by purchaser, forgings and flash welded rings to be machined all over may have an oxygen-rich layer provided such layer is removable within the machining allowance on the forging or ring.3.5.2 Forging StockWhen a sample of stock is forged to a test coupon and heat treated
35、as in 3.4, specimens taken from the heat treated coupon shall conform to the requirements of 3.5.1.1 and, when required, 3.5.1.2. If specimens taken from the stock after heat treatment as in 3.4 conform to the requirements of 3.5.1.1 and, when required, 3.5.1.2, the tests shall be accepted as equiva
36、lent to tests of a forged coupon.3.5.3 Stock for Flash Welded RingsA sample of stock heat treated as in 3.4 shall conform to the requirements of 3.5.1.1 and, when specified, 3.5.1.2.3.6 QualityThe product, as received by purchaser, shall be uniform in quality and condition, sound, and free from fore
37、ign materials and from imperfections detrimental to usage of the product.3.7 TolerancesUnless otherwise specified, tolerances for bars and wire shall conform to all applicable requirements of AMS2241.3.8 Production, distribution, and procurement of metal stock shall comply with AS6279. This requirem
38、ent becomes effective September 1, 2016.4. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for InspectionThe 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 a
39、ny 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) of each heat and
40、hydrogen content of each lot.4.2.1.2 Tensile properties (3.5.1.1), notched/unnotched tensile ratio when required (3.5.1.2), and surface contamination (3.5.1.4) of each lot of bars, wire, forgings, and flash welded rings.4.2.1.3 Tolerances of each lot of bars and wire.4.2.2 Periodic TestsThe followin
41、g requirements are periodic tests and shall be performed at a frequency selected by the producer unless frequency of testing is specified by purchaser:4.2.2.1 Tensile properties (3.5.1.1) and notched/unnotched tensile ratio (3.5.1.2) of bars, wire, forgings, and flash welded rings after reheating pe
42、r 3.5.4.2.2.2 Ability of forging stock (3.5.2) and stock for flash welded rings (3.5.3) to develop required properties.SAE INTERNATIONAL AMS4924H Page 6 of 94.2.3 Preproduction TestsTests of forgings to determine conformance to all applicable technical requirements of this specification when AMS2375
43、 is specified are classified as preproduction tests and shall be performed prior to or on the first-article shipment of a forging to a purchaser, when a change in material or processing, or both, requires reapproval as in 4.4, and when purchaser deems confirmatory testing to be required.4.3 Sampling
44、 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; a heat shall be the consumable electrode remelted ingots produced from alloy originally melted as a single furnace charge.4.3.1 For Ac
45、ceptance Tests4.3.1.1 CompositionOne sample from each heat except that for hydrogen determinations one sample from each lot, obtained after thermal and chemical processing is completed.4.3.1.2 Tensile PropertiesAt least one sample from bars, wire, and flash welded rings from each lot. One longitudin
46、al sample shall be taken from a section having maximum thickness from each lot of forgings.4.3.1.2.1 Specimens from flash welded rings shall be cut from parent metal not including the weld-heat-affected zone.4.3.1.2.2 Notched/Unnotched Tensile RatioAs agreed upon by purchaser and producer. Specimens
47、 shall be taken from adjacent locations and in the same grain direction of the product and machined to the respective dimensions of Figure 1 and Table 3.4.3.1.3 Surface ContaminationAs agreed upon by purchaser and producer.4.3.2 For Periodic Tests and Preproduction TestsAs agreed upon by purchaser a
48、nd producer.4.4 ApprovalWhen specified, approval and control of forgings shall be in accordance with AMS2375.4.5 Reports4.5.1 The producer shall furnish with each shipment a report showing producer identity, country where the metal was melted (i.e., final melt in the case of metal processed by multi
49、ple melting operations), the results of tests for composition of each heat and for the hydrogen content, tensile properties, surface contamination, and, when specified, the notched/unnotched tensile ratio of each lot, and state that the product conforms to the other technical requirements of this specification. This report shall include the purchase order number, heat and lot number, AMS4924H, product
