1、AEROSPACE MATERIAL SPECIFICATION AMS4904 REV. C Issued 2003-04 Revised 2015-03 Superseding AMS4904B Titanium Alloy Sheet, Strip, and Plate 6Al - 4V Solution Heat Treated and Aged (Composition similar to UNS R56400) RATIONALE AMS4904C results from a Five Year Review and update of this specification t
2、hat 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 (3.5.1.2), removes the upper limit on ultrasonic quality (3.6.1), adds AS6279 (3.8), adds AMS2368 in sampling
3、and resampling (4.3 and 4.5) and revises the report paragraph (4.4). 1. SCOPE 1.1 Form This specification covers a titanium alloy in the form of sheet, strip, and plate up through 2.000 inches (50.80 mm), inclusive. 1.2 Application This material has been used typically requiring high strength-to-wei
4、ght ratio and stability up to 550 F (288 C) in the precipitation heat treated condition in material thicknesses 2.000 inches (50.80 mm) and under, but usage is not limited to such applications. 1.3 Certain processing procedures and service conditions may cause these products to become subject to str
5、ess-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 part of this specification to the extent specified herein. The supplier may work to a subsequent revision
6、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. _ SAE Technical Standards Board Rules provide that: “This report is published by SAE to
7、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.” SAE reviews each technical report at leas
8、t 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 part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form o
9、r 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: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/w
10、ww.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS4904C SAE INTERNATIONAL AMS4904C Page 2 of 7 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-73
11、23 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2242 Tolerances, Corrosion and Heat Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Sheet, Strip, and Plate AMS2249 Chemical Check Analysis Limits, Titanium and Titanium Alloys AMS2368 Sampling and Testing of Wrou
12、ght Titanium Raw Materials, Except Forging and Forging Stock AMS2631 Ultrasonic Inspection, Titanium and Titanium Alloy Bar and Billet AMS2750 Pyrometry AMS2809 Identification, Titanium and Titanium Alloy Wrought Products ARP982 Minimizing Stress-Corrosion Cracking in Wrought Titanium Alloy Products
13、 AS6279 Industry Standard Practices 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
14、 Materials ASTM E112 Determining Average Grain Size ASTM E384 Knoop and Vickers Hardness of Materials ASTM E539 Analysis of Titanium 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
15、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 Metals and Their Alloys by Combustion Analysis ASTM E2371 Analysis of Titanium and Titanium Alloys by Direct
16、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 be determined in accordance with ASTM E1941, hydrogen in accordance with ASTM E1447, oxygen and nitrogen in a
17、ccordance 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 AMS4904C Page 3 of 7 Table 1 - Composition Element min max Aluminum 5.50 6.75 Vanadium 3.50 4.50 Iron - 0.30 Oxygen - 0.20
18、Carbon - 0.08 Nitrogen - 0.05 (500 ppm) Hydrogen - 0.015 (150 ppm) Yttrium (3.1.1) - 0.005 ( 50 ppm) Other Elements, each (3.1.1) - 0.10 Other Elements, total (3.1.1) - 0.40 Titanium remainder 3.1.1 Determination not required for routine acceptance. 3.1.2 Check Analysis Composition variations shall
19、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 beam cold hearth, or plasma arc cold hearth melting practice. The subsequent melt or melts shall be made un
20、der vacuum using vacuum arc remelting (VAR) practice. Alloy additions are not permitted in the final melt cycle. 3.2.1 The atmosphere for non-consumable electrode melting shall be vacuum or shall be argon and/or helium at an absolute pressure not higher than 1000 mm of mercury. 3.2.2 The electrode t
21、ip for nonconsumable electrode melting shall be water cooled copper. 3.3 Condition The product shall be supplied in the following condition: 3.3.1 Sheet and Strip Hot rolled, with or without subsequent cold reduction, solution heat treated, descaled, leveled, and precipitation hardened (aged), havin
22、g a surface appearance comparable to a commercial corrosion-resistant steel sheet ASTM No. 2D finish (See 8.3). 3.3.2 Plate Hot rolled, solution treated, flattened, and precipitation hardened (aged), having a surface appearance comparable to a commercial corrosion-resistant steel ASTM No. 1 finish (
23、See 8.3). Plate product shall be produced using standard industry practices designed strictly for the production of plate stock to the procured thickness. Bar, billet, forgings, or forging stock shall not be substituted for plate. 3.4 Heat Treatment The product shall be solution heat treated and age
24、d by heating in a suitable atmosphere to a temperature within the range 1650 to 1775 F (899 to 968 C), holding at the selected temperature within 25 F (14 C) for a time commensurate with product thickness and the heating equipment and procedure used, and cooling at a rate equivalent to a water quenc
25、h and then aged by heating to 900 to 1275 F 15 (482 to 691 C 8), holding at heat for 2 to 8 hours, and cooling in air. Pyrometry shall be in accordance with AMS2750. SAE INTERNATIONAL AMS4904C Page 4 of 7 3.5 Properties Product shall conform to the following requirements: 3.5.1 Tensile Properties Sh
26、all 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 strain. Table 2A - Tensile properties,
27、 inch/pound units (See 8.2) Nominal Thickness Inch Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D % Up to 0.032, excl 160 145 3 (See 3.5.1.1) 0.032 to 0.049, excl 160 145 4 0.049 to 0.1875, excl 160 145 5 0.1875 to 0.750, excl 160 145 8 0.750 to 1.000, excl 150 1
28、40 6 1.000 to 2.000, incl 145 135 6 Table 2B - Tensile properties, SI units (See 8.2) Nominal Thickness mm Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 50.8 mm or 4D % Up to 0.81, excl 1103 1000 3 (See 3.5.1.1) 0.81 to 1.24, excl 1103 1000 4 1.24 to 4.76, excl 1103 1000 5 4.7
29、6 to 19.05, excl 1103 1000 8 19.05 to 25.40, excl 1034 965 6 25.40 to 50.80, incl 1000 931 6 3.5.1.1 For thickness under 0.025 inch (0.64 mm), elongation values shall be as agreed. 3.5.1.2 Mechanical property requirements for product outside the size range covered by Table 2 shall be agreed upon bet
30、ween purchaser and producer. 3.5.2 Microstructure Shall be that structure resulting from processing within the alpha-beta phase field. Microstructure shall conform to 3.5.2.1 or 3.5.2.2 (See 8.5). 3.5.2.1 Equiaxed and/or elongated primary alpha in a transformed beta matrix with no continuous network
31、 of alpha at prior beta grain boundaries. 3.5.2.2 Primary alpha in an aged transformed beta matrix. 3.5.2.3 A microstructure showing a continuous network of alpha in prior beta grain boundaries is not acceptable. 3.5.3 Surface Contamination The product shall be free of any oxygen-rich layer, such as
32、 alpha case, or other surface contamination, determined as in 3.5.3.1 or 3.5.3.2, or other method acceptable to purchaser. 3.5.3.1 Microscopic examination at 400X minimum. SAE INTERNATIONAL AMS4904C Page 5 of 7 3.5.3.2 Hardness difference; a surface hardness more than 40 points higher than the subsu
33、rface hardness, determined in accordance with ASTM E384 on the Knoop scale using a 200-gram load, being evidence of unacceptable surface contamination. 3.6 Quality The product, as received by purchaser, shall be uniform in quality and condition, sound, and free from “oil cans” (See 8.4) of depth in
34、excess of the flatness tolerances, ripples, and foreign materials and from imperfections detrimental to usage of the product. 3.6.1 Ultrasonic Inspection Plate 0.500 inch (12.70 mm) and over in nominal thickness shall meet Class A1 requirements of AMS2631. 3.7 Tolerances In accordance with AMS2242.
35、3.8 Production, distribution, and procurement of metal stock shall comply with AS6279. This requirement becomes effective October 1, 2016. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The producer of the product shall supply all samples for producers tests and shall be responsib
36、le 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 conforms to specified requirements. 4.2 Classification of Tests All technical requirements are acceptance tests and shall be perfor
37、med on each heat or lot as applicable. 4.2.1 When required, ultrasonic inspection (3.6.1) of each plate. 4.3 Sampling and Testing Shall 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 and in the same h
38、eat treatment batch. 4.3.1 Composition One sample from each heat, except that for hydrogen determinations one sample from each lot obtained after thermal and chemical processing is completed. 4.3.2 Tensile Properties, Microstructure and Surface Contamination At least one sample from each lot. 4.3.2.
39、1 Specimens for tensile tests of widths 9 inches (229 mm) and over shall be taken in both the longitudinal and transverse directions; for widths under 9 inches (229 mm), specimens shall be taken in the longitudinal direction. 4.3.3 Ultrasonic Inspection Each plate, when required (3.6.1). SAE INTERNA
40、TIONAL AMS4904C Page 6 of 7 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 operations), the results of tests for composition of each heat and f
41、or the hydrogen content, tensile properties, and surface contamination of each lot, and ultrasonic quality, when required, and state that the product conforms to the other technical requirements. This report shall include the purchase order number, heat and lot numbers, AMS4904C, product form, mill
42、produced size, solution and ageing treatment used, and quantity. 4.4.2 When the product size is outside the range covered by 1.1, the report shall contain a statement to that effect. 4.5 Resampling and Retesting In accordance with AMS2368. 5. PREPARATION FOR DELIVERY 5.1 Identification In accordance
43、 with AMS2809. 5.2 Packaging The product shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the product to ensure carrier acceptance and safe delivery. 6. ACKNOWLED
44、GEMENT A producer shall include this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Product not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A change bar
45、 (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 techn
46、ical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 These mechanical properties have been taken from MIL-T-9046 and have not been substantiated by AMS statistical procedures. 8.3 Commercial corrosion-resistant steel fin
47、ishes are defined in ASTM A480/A480M and AS4194. 8.4 Terms used in AMS are clarified in ARP1917 and as follows: 8.4.1 “Oil Can” An excess of material in a localized area of a sheet that causes the sheet to buckle in that area. When a sheet is placed on a flat surface and hand pressure applied to the
48、 buckle, the buckle will spring through to the opposite surface or spring up in another area of the sheet. SAE INTERNATIONAL AMS4904C Page 7 of 7 8.5 Terminology relating to titanium microstructures is presented in AS1814. 8.6 Dimensions and properties in inch/pound units and the Fahrenheit temperat
49、ures are primary; dimensions and properties in SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.7 Purchase documents should specify not less than the following: AMS4904C Product form and size of product desired Quantity of product desired Property and acceptance requirements from the cognizant engineering organization applicab
