1、AEROSPACE MATERIAL SPECIFICATION AMS4989 REV. C Issued 2003-04 Revised 2014-07 Superseding AMS4989B Titanium Alloy Sheet, Strip, and Plate 3Al - 2.5V Annealed (Composition similar to UNS R56320) RATIONALE AMS4989C results from a Five Year Review and update of this document that includes the removal
2、of sample size allowance for hydrogen from 3.1, revises melting practice, revises bending requirements of Table 3, requires ultrasonic testing of all plate 0.500 inch (12.7 mm) and over (3.6.1), includes the addition of AS6279 (3.8) and AMS2368 to sampling (4.3) and revises the report paragraph (4.4
3、). 1. SCOPE 1.1 Form This specification covers a titanium alloy in the form of sheet, strip, and plate up through 1.000 inch (25.40 mm), inclusive. 1.2 Application This material has been used typically for parts requiring strength and oxidation resistance up to 600 F (316 C) and weldability, but usa
4、ge is not limited to such applications. 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 of a document unless a specific document
5、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 Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (insi
6、de USA and Canada) or 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 Wrought Titaniu
7、m Raw Material, Except Forgings and Forging Stock _ 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 us
8、e, 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, or cancelled. SAE invites your written comments and suggestions. Copyright 2014 SAE In
9、ternational 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 otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-60
10、6-7323 (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 Report, please visit http:/www.sae.org/technical/standards/AMS4989C SAE INTERNATIONAL AMS4
11、989C Page 2 of 7 AMS2631 Ultrasonic Inspection, Titanium and Titanium Alloy Bar and Billet AMS2750 Pyrometry AMS2809 Identification, Titanium and Titanium Alloy Wrought Products AS6279 Industry Standard Practices for Production, Distribution, and Procurement of Metal Stock 2.2 ASTM Publications Avai
12、lable 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 8M Tension Testing of Metallic Materials ASTM E 290 Bend Testing of Material for Ductility ASTM E 384 Knoop and Vickers Hardness of Materials ASTM E 14
13、09 Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by the Inert Gas Fusion Technique ASTM E 1447 Determination of Hydrogen in Titanium and Titanium Alloys by the Inert Gas Fusion Thermal Conductivity/Infared Detection Method ASTM E 1941 Determination of Carbon in Refractory and
14、Reactive Metals and Their Alloys by Combustion Analysis ASTM E 2371 Analysis of Titanium and Titanium Alloys by Direct Current Plasma and Inductively Coupled Atomic Emission Spectrometry 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1; carbon sha
15、ll be determined in accordance with ASTM E 1941, hydrogen in accordance 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 - COMPOSITION Element min max
16、Aluminum 2.50 3.50 Vanadium 2.00 3.00 Iron - 0.30 Oxygen - 0.12 Carbon - 0.050 Nitrogen - 0.020 (200 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 routi
17、ne acceptance. 3.1.2 Check Analysis Composition variations shall meet the applicable requirements of AMS2249. SAE INTERNATIONAL AMS4989C Page 3 of 7 3.2 Melting Practice 3.2.1 Alloy shall be multiple melted. The first melt shall be made by vacuum consumable electrode, nonconsumable electrode, electr
18、on 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 VAR melt. 3.2.1.1 The atmosphere for non-consumable electrode melting shall be vacuum or
19、shall be argon and/or helium at an absolute pressure not higher than 1000 mm of mercury. 3.2.1.2 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 Sheet and Strip Hot rolled, with or witho
20、ut subsequent cold reduction, annealed, descaled, and leveled, having a surface appearance comparable to a commercial corrosion-resistant steel No. 2D finish (See 8.2). 3.3.2 Plate Hot rolled, annealed, descaled, and flattened, having a surface appearance comparable to a commercial corrosion-resista
21、nt steel No. 1 finish (See 8.2). 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 supplied in lieu of plate. 3.4 Heat Treatment The product shall be an
22、nealed by heating to a temperature within the range 1200 to 1450 F (649 to 788 C), holding at the selected temperature within 25 F (14 C) for a time commensurate with the thickness and the heating equipment and procedure used, and cooling as required. Pyrometry shall be in accordance with AMS2750. 3
23、.5 Properties Product 1.000 inch (25.40 mm) thick and under shall conform to the following requirements: 3.5.1 Tensile Properties Shall be as specified 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
24、within a tolerance of 0.002 inch/inch/minute (0.002 mm/mm/minute) through the 0.2% offset yield strain. 3.5.1.1 Tensile property requirements listed in Table 2 apply in both the longitudinal and transverse directions. TABLE 2 - MINIMUM TENSILE PROPERTIES (SEE 8.3) Property Value Tensile Strength 90
25、ksi (621 MPa) Yield Strength at 0.2% Offset 75 ksi (517 MPa) Elongation in 2 Inches (50.8 mm) 15% (3.5.1.2) 3.5.1.2 For thickness under 0.025 inch (0.64 mm), elongation values shall be as agreed upon. 3.5.1.3 Tensile property requirements for product outside the range covered by 3.5 shall be agreed
26、upon between producer and purchaser. SAE INTERNATIONAL AMS4989C Page 4 of 7 3.5.2 Bending Product under 0.1875 inch (4.762 mm) in nominal thickness shall have a test sample prepared nominally 0.750 inch (19.06 mm) in width, with its axis of bending parallel to the direction of rolling. The sample sh
27、all be bend tested in conformance with the guided bend test defined in ASTM E 290 through an angle of 105 degrees. The test fixture supports shall have a contact radius 0.010 inch (0.25 mm) minimum, and the plunger shall have a radius equal to the bend factor shown in Table 3 times the nominal thick
28、ness. Examination of the bent sample shall not show evidence of cracking when examined at 15 to 25X magnification. TABLE 3 - BEND FACTOR Nominal Thickness Inch Nominal Thickness Millimeters Bend Factor Up to 0.070, excl Up to 1.78, excl 2.5 0.070 to 0.1875, excl 1.78 to 4.762, incl 3 3.5.3 Microstru
29、cture Shall be that structure resulting from processing within the alpha-beta phase field. Microstructure shall conform to 3.5.3.1, 3.5.3.2, or 3.5.3.3 (See 8.4). 3.5.3.1 Equiaxed and/or elongated primary alpha in a transformed beta matrix with no continuous network of alpha at prior beta grain boun
30、daries. 3.5.3.2 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. 3.5.3.3 Partially broken and distorted grain boundary alpha with plate-like alpha. 3.5.3.4 A microstructure showing
31、 a continuous network of alpha in prior beta grain boundaries is not acceptable. 3.5.4 Surface Contamination The product shall be free of any oxygen-rich layer, such as alpha case, or other surface contamination, determined as in any one of the following: 3.5.4.1, 3.5.4.2, 3.5.4.3, or other method a
32、cceptable to purchaser. 3.5.4.1 The bend test of 3.5.1.2. 3.5.4.2 Microscopic examination at 400X minimum. 3.5.4.3 Hardness difference; a surface hardness more than 40 points higher than the subsurface hardness, determined in accordance with ASTM E 384 on the Knoop scale using a 200 gram load, being
33、 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 8.5.1) of depth in excess of the flatness tolerances, ripples, and foreign materials and from imperfections detrimental
34、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. SAE INTERNATIONAL AMS4989C Page 5 of 7 3.7 Tolerances 3.7.1 Thickness, Width, Length, and Straightness In accordance with all applicable require
35、ments of AMS2242. 3.7.2 Flatness Flatness tolerance for product 36 inches (914 mm) and under in width shall be 5% if nominal thickness is under 0.025 inch (0.64 mm) and 3% if nominal thickness is 0.025 to 0.1875 inch (0.64 to 4.762 mm), exclusive. Flatness tolerance for product under 0.1875 inch (4.
36、762 mm) in nominal thickness and over 36 inches (914 mm) in width and for product 0.1875 inch (4.762 mm) and over in nominal thickness in all widths shall be as agreed upon by purchaser and vendor. 3.7.2.1 Flatness shall be determined from the expression 100H/L where “H” is the distance from the str
37、aight edge to the product at the point of greatest separation and “L” is the distance between contact points of a straight edge laid in any direction on the product. 3.7.2.2 Flatness tolerances do not apply to coiled products. 3.8 Production, distribution, and procurement of metal stock shall comply
38、 with AS6279. This requirement becomes effective October 1, 2015. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The 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
39、 sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to the specified requirements. 4.2 Classification of Tests Composition (3.1), condition (3.3), tensile properties (3.5.1), bending (3.5.2), microstructure (3.5.3), surface contamination (3.5.4), and
40、tolerances (3.7) are acceptance tests and shall be performed on each heat or lot as applicable. 4.2.1 Ultrasonic quality (3.6.1) of each plate, when required, is an acceptance test. 4.3 Sampling and Testing Shall be in accordance with AMS2368 and the following; a lot shall be all product of the same
41、 nominal size from the same heat processed at the same time and in the same heat 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, Bendi
42、ng, Microstructure and Surface Contamination At least one sample from each lot. 4.3.2.1 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
43、 direction. 4.3.2.2 Bend Specimens Whenever possible, the specimen shall be long enough to permit two separate bends so that each surface is tested in tension. SAE INTERNATIONAL AMS4989C Page 6 of 7 4.4 Reports 4.4.1 The producer shall provide with each shipment a report showing producer identity, c
44、ountry where the metal was melted (i.e., 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 and bending properties, and surface contamination of each lot, ultrasonic quality when required,
45、 and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, heat and lot numbers, AMS4989C, product form, size, and quantity. 4.4.2 Mechanical property requirements for product outside the range covered by 3.5 shall be agreed upon
46、between purchaser and producer. 4.5 Resampling and Retesting If any specimen used in the above tests fails to meet the 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
47、specimen to meet the specified requirements shall be cause for rejection of the product represented. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in accordance with AMS2809. 5.2 Packaging The product shall be prepared for shipment in accordance with
48、 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. ACKNOWLEDGMENT A vendor shall include this specification number and revision letter in all quotatio
49、ns 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 (|) 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 do
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