1、AEROSPACE MATERIAL SPECIFICATION AMS4930 REV. H Issued 1966-03 Revised 2015-01 Superseding AMS4930G Titanium Alloy Bars, Wire, Forgings, and Rings 6Al - 4V, Extra Low Interstitial Annealed (Composition similar to UNS R56401) RATIONALE AMS4930H results from a Five Year Review and update of this speci
2、fication that includes the removal of sample size allowance for hydrogen of Table 1 (covered by ASTM E1447) and allowance of higher hydrogen for forgings, requires agreement on mechanical property values for material outside specification ranges (3.5.1.1.6 and 8.6), the addition of AS6279 (3.8) and
3、revises the report paragraphs (4.4). 1. SCOPE 1.1 Form This specification covers a titanium alloy in the form of bars, wire, forgings, flash welded rings 4.000 inches (101.60 mm) and under in nominal diameter or distance between parallel sides, and stock for forging or flash welded rings of any size
4、. 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. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date
5、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 superseding document has been specified, the las
6、t published issue of that document shall apply. 2.1 SAE Publications 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
7、 Alloy, Titanium, and Titanium Alloy Bars and Wire AMS2249 Chemical Check Analysis Limits, Titanium and Titanium Alloys AMS2750 Pyrometry _ 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 r
8、eport 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.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized
9、, or cancelled. SAE invites your written comments and suggestions. Copyright 2015 SAE International All rights reserved. No 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 otherw
10、ise, 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: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Re
11、port, please visit http:/www.sae.org/technical/standards/AMS4930H SAE INTERNATIONAL AMS4930H Page 2 of 7 AMS2808 Identification, Forgings AMS2809 Identification, Titanium and Titanium Alloy Wrought Products AMS7498 Rings, Flash Welded, Titanium and Titanium Alloys AS6279 Industry Standard Practices
12、for Production, Distribution, and Procurement of Metal Stock 2.2 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 Tit
13、anium Alloys by X-Ray Fluorescence Spectrometry ASTM E1409 Determination 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 Metho
14、d ASTM E1941 Determination of Carbon in Refractory and Reactive Metals 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 conf
15、orm 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 E539 or ASTM E2371. Other analytical methods may be used
16、if acceptable to the purchaser. Table 1 - Composition Element min max Aluminum Vanadium Iron Oxygen Carbon Nitrogen Hydrogen Yttrium (3.1.2) Other Elements, each (3.1.1) Other Elements, total (3.1.1) Titanium 5.50 3.50 - - - - - - - - remainder 6.50 4.50 0.25 0.13 0.08 0.05 0.0125 0.005 0.10 0.40 (5
17、00 ppm) (125 ppm) ( 50 ppm) 3.1.1 Determination not required for routine acceptance. 3.1.2 Check Analysis Composition variations shall meet the applicable requirements of AMS2249. SAE INTERNATIONAL AMS4930H Page 3 of 7 3.2 Melting Practice Alloy shall be multiple melted. The first melt shall be made
18、 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 permitted in the final melt cycle. 3.2.1 The atm
19、osphere 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 Condition The product shall be supplied in the following condition: 3.3.1
20、Bars Hot finished with or without subsequent cold reduction, annealed, and descaled. A machined or ground surface is permitted unless prohibited by purchaser. The product shall be processed to the final thickness/diameter by metallurgical working operations prior to any straightening, dimensional si
21、zing or surface finishing operations. Bar shall not be cut from plate. 3.3.2 Wire Cold drawn, annealed, and descaled. 3.3.3 Forgings and Flash Welded Rings Annealed and descaled. 3.3.3.1 Flash welded rings shall not be supplied unless specified or permitted on purchasers part drawing. When supplied,
22、 rings shall be manufactured in accordance with AMS7498. 3.3.4 Stock for Forging or Flash Welded Rings As ordered by the forging or flash welded ring manufacturer. 3.4 Annealing Bars, wire, forgings, and flash welded rings shall be annealed by heating to a temperature within the range 1300 to 1450 F
23、 (704 to 788 C), holding at the selected temperature within 25 F (14 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 Properties The product shall conform to the following requirements. 3
24、.5.1 Bars, Wire, Forgings, and Flash Welded Rings 3.5.1.1 Tensile Properties Shall be as specified in Table 2 for product 4.000 inches (101.60 mm) and under in nominal diameter or distance between parallel sides, determined in accordance with ASTM E8 / E8M on specimens as in 4.3.1.2 with the rate of
25、 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. SAE INTERNATIONAL AMS4930H Page 4 of 7 3.5.1.1.1 Longitudinal requirements in Table 2 apply to specimens from bars, forgin
26、gs, and wire taken with the axis approximately parallel to the grain flow and to specimens from flash welded rings taken in the circumferential direction. 3.5.1.1.2 Transverse tensile properties in Table 2 apply only to product from which a test specimen not less than 2.50 inches (63.5 mm) in length
27、 can be taken. 3.5.1.1.3 Yield strength and reduction of area requirements do not apply to wire under 0.125 inch (3.18 mm) in diameter. 3.5.1.1.4 Tests in the transverse direction are not required from product tested in the longitudinal direction. Table 2A - Minimum tensile values, inch/pound units
28、Nominal Diameter or Distance Between Parallel Sides Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 4D % Long. Elongation in 4D % L.T. Elongation in 4D % S.T. Reduction of Area % Long. Reduction of Area % L.T. Reduction of Area % S.T. Up to 1.500, incl 125 115 10 10 - 25
29、20 - Over 1.500 to 2.000, incl 120 110 10 10 - 20 15 - Over 2.000 to 2.500, incl 120 110 8 8 - 15 15 - Over 2.500 to 4.000, incl 120 110 8 8 8 15 15 15 Table 2B - Minimum tensile values, SI units Nominal Diameter or Distance Between Parallel Sides Millimeters Tensile Strength MPa Yield Strength at 0
30、.2% Offset MPa Elongation in 4D % Long. Elongation in 4D % L.T. Elongation in 4D % S.T. Reduction of Area % Long. Reduction of Area % L.T. Reduction of Area % S.T. Up to 38.10, incl 862 793 10 10 - 25 20 - Over 38.10 to 50.80, incl 827 758 10 10 - 20 15 - Over 50.80 to 63.50, incl 827 758 8 8 - 15 1
31、5 - Over 63.50 to 101.60, incl 827 758 8 8 8 15 15 15 Note: Long. = Longitudinal L.T. = Long-Transverse S.T. = Short-Transverse 3.5.1.1.5 Properties of forgings having shapes and dimensions not readily classified by nominal diameter or distance between parallel sides as in Table 1 shall be as agreed
32、 upon by purchaser and producer. 3.5.1.1.6 Mechanical property requirements for product outside the range covered by 3.5.1.1 shall be agreed upon between purchaser and producer. 3.5.1.2 Microstructure Shall be that structure resulting from processing within the alpha-beta field. Microstructure shall
33、 conform to 3.5.1.2.1 or 3.5.1.2.2. 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 boundaries. 3.5.1.2.2 Essentially complete field of equiaxed and/or elongated alpha with no continuous network of alpha at prior
34、beta grain boundaries. 3.5.1.3 Surface Contamination Except as specified in 3.5.1.3.1 and 3.5.1.3.2, the product shall be free of any oxygen-rich layer, such as alpha case, or other surface contamination, determined by microscopic examination at not lower than 400X magnification or other method agre
35、ed upon by purchaser and producer. SAE INTERNATIONAL AMS4930H Page 5 of 7 3.5.1.3.1 An oxygen-rich layer (See 8.2) not greater than 0.001 inch (0.025 mm) in depth will be permitted on bars other than rounds. 3.5.1.3.2 When permitted by purchaser, forgings and flash welded rings to be machined all ov
36、er may have an oxygen-rich layer provided such layer is removable within the machining allowance on the forging or flash welded ring. 3.5.2 Forging Stock When a sample of stock is forged to a test coupon and annealed as in 3.4, specimens taken from the annealed coupon shall conform to the requiremen
37、ts of 3.5.1.1, and, when specified, 3.5.1.2. If specimens taken from the stock after annealing as in 3.3 conform to the requirements of 3.5.1.1 and, when specified, 3.5.1.2, the tests shall be accepted as equivalent to tests of a forged coupon. 3.5.3 Stock for Flash Welded Rings When a sample of sto
38、ck is annealed as in 3.4, specimens taken from the annealed coupon shall conform to the requirements of 3.5.1.1 and, when specified, 3.5.1.2. 3.6 Quality 3.6.1 The product, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfecti
39、ons detrimental to usage of the product. 3.7 Tolerances 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 requirement becomes effective June 01, 2016. 4. QUALITY ASSURANCE PROVISIONS 4.1
40、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 confor
41、ms to 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 Tensile properties (3.5.1.1), microstructure (3.5.1.2), and surfa
42、ce contamination (3.5.1.3) of each lot of bars, wire, forgings, and flash welded rings. 4.2.1.3 Tolerances (3.7) of each lot of bars and wire. 4.2.2 Periodic Tests Tests of forging stock (3.5.2) and of stock for flash welded rings (3.5.3) to demonstrate ability to develop required properties are per
43、iodic tests and shall be performed at a frequency selected by the producer unless frequency of testing is specified by purchaser: SAE INTERNATIONAL AMS4930H Page 6 of 7 4.3 Sampling and Testing Shall be as follows; a lot shall be all product of the same nominal size from the same heat processed at t
44、he same time and annealed in the same heat treat batch: 4.3.1 For Acceptance Tests 4.3.1.1 Composition One 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 Properties One sample from b
45、ars, wire, and flash welded rings from each lot. The number, location, and orientation of samples from each lot of forgings shall be as agreed upon by purchaser and producer. If not specified, not less than two specimens shall be taken, one each, from areas of minimum and maximum thickness of the fo
46、rging. 4.3.1.2.1 Specimens from flash welded rings shall be taken from parent metal not including the weld-heat-affected zone. 4.3.1.3 Microstructure and Surface Contamination As agreed upon by purchaser and producer. If not specified, at least one specimen from each lot shall be prepared metallogra
47、phically for examination. 4.3.2 For Periodic Tests As agreed upon by purchaser and producer. 4.4 Reports 4.4.1 The producer shall furnish with each shipment a report showing producer identity, country where the metal was melted (e.g., final melt in the case of metal processed by multiple melting ope
48、rations), the results of tests for composition of each heat and for the hydrogen content, tensile properties, surface contamination, and microstructure of each lot, and state that the product conforms to the other technical requirements. This report shall include the purchase order number, lot numbe
49、r, AMS4930H, product form and mill produced size (and/or part number, if applicable), specific annealing treatment used, and quantity. If forgings are supplied, the part number and 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 The producer of stock for forg
