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 there
2、from, 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 International All rights reserved. No part of this p
3、ublication 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: +1 724-776-497
4、0 (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/AMS4914F AEROSPACE MATERIAL SPECIFICATION AMS4914 REV. F Issued 1984-04 Revised 2
5、014-04 Superseding AMS4914E Titanium Alloy Cold Rolled Sheet and Strip 15V - 3Al - 3Cr - 3Sn Solution Heat Treated (Composition similar to UNS R58153) RATIONALE AMS4914F results from a Five Year Review and update of this specification that that restricts material to the sizes of the mechanical prope
6、rty tables (1.1), includes removing the allowance for additional sample weight for hydrogen (Table 1) (See AMS2368), revises melting to require all remelting under vacuum (3.2.1), requires agreement on mechanical property values for material outside the size range of 1.1, revises flatness tolerance
7、requirements (3.7), adds AS6279 (3.8) and AMS2368 (4.3) and revises the report paragraph (4.4). 1. SCOPE 1.1 Form This specification covers a titanium alloy in the form of sheet and strip up to and including 0.125 inches (3.18 mm) in thickness. 1.2 Application These products have been used typically
8、 in applications requiring high strength-to-weight ratio and stability up to 550 F (288 C), but usage is not limited to such applications. Parts are typically formed in the solution heat treated condition and subsequently precipitation heat treated to final condition. 2. APPLICABLE DOCUMENTS The iss
9、ue 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 issue is specified. When the referenced document has been cancelled and
10、 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 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS2242
11、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 SAE INTERNATIONAL AMS4914F Page 2 of 7 AMS2368 Sampling and Testing of Wrought Titanium Raw Materials, Except Forgings
12、 and Forging Stock AMS2750 Pyrometry AMS2801 Heat Treatment of Titanium Alloy Parts AMS2809 Identification, Titanium and Titanium Alloy Wrought Products AS6279 Industry Standard Practices for Production, Distribution, and Procurement of Metal Stock 2.2 ASTM Publications Available from ASTM Internati
13、onal, 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 112 Determining Average Grain Size ASTM E 290 Bend Testing of Material for Ductility ASTM E 1409 Determination of Oxygen and Nit
14、rogen 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/Infrared Detection Method ASTM E 1941 Determination of Carbon in Refractory and Reactive Metals and Their Alloys
15、by Combustion Analysis ASTM E 2371 Analysis of Titanium and Titanium Alloys by Direct 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 accord
16、ance 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 Vanadium Chromium Tin Alum
17、inum Iron Oxygen Carbon Nitrogen Hydrogen Other Elements, each (3.1.1) Other Elements, total (3.1.1) Titanium 14.0 2.5 2.5 2.5 - - - - - - - remainder 16.0 3.5 3.5 3.5 0.25 0.13 0.05 0.05 0.015 0.10 0.40 (500 ppm) (150 ppm) SAE INTERNATIONAL AMS4914F Page 3 of 7 3.1.1 Determination not required for
18、routine acceptance. 3.1.2 Check Analysis Composition variations shall 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
19、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 atmosphere for nonconsumable electrode melting shall be vacuum or shall be argon and/or helium at an absolu
20、te 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 Hot rolled with subsequent cold reduction, solution heat treated, descaled, and leveled, having a surface appearance comparable to a commercial corr
21、osion-resistant steel ASTM No. 2D finish (See 8.2). 3.4 Heat Treatment Product shall be solution heat treated by heating to a temperature within the range 1450 to 1500 F (788 to 816 C), holding at the selected temperature within 25 F (14 C) for 3 to 30 minutes, and cooling at a rate that will produc
22、e product meeting the requirements of 3.5 (See 8.3). Pyrometry shall be in accordance with AMS2750. 3.5 Properties The product shall conform to the following requirements: 3.5.1 As Solution Heat Treated 3.5.1.1 Tensile Properties Shall be as shown in Table 2 for product 0.125 inch (3.18 mm) and unde
23、r in nominal thickness, 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 2 - TENSILE PROPERTIES Propert
24、y Value Tensile Strength 102 to 137 ksi (703 to 945 MPa) Yield Strength at 0.2% Offset 100 to 126 ksi (689 to 869 MPa) Elongation in 2 Inches (50.8 mm) 12% minimum 3.5.1.1.1 Mechanical property requirements for product outside the range covered by 3.5.1.1 shall be agreed upon between purchaser and p
25、roducer. 3.5.1.2 Bending Product 0.125 inch (3.18 mm) and under 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 shall be bend tested in accordance with the guided bend test def
26、ined 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 thickness. Examination of the bent sample shall not show evidence of
27、 cracking when examined at 15 to 25X magnification. SAE INTERNATIONAL AMS4914F Page 4 of 7 TABLE 3 - BENDING Nominal Thickness Inch Nominal Thickness Millimeters Bend Factor Up to Over 0.070 to 0.125, in Up to 1.78, inc Over 1.78 to 3.18, inc 4 5 3.5.1.2.1 Mechanical property requirements for produc
28、t outside the range covered by 3.5.1.2 shall be agreed upon between purchaser and producer. 3.5.1.3 Surface Contamination The product shall be free of any oxygen-rich layer, such as alpha case, or other surface contamination, determined by the bend test of 3.5.1.2 or other method acceptable to purch
29、aser. 3.5.2 After Precipitation Heat Treatment (Capability Test) Precipitation heat treat in accordance with AMS2801 using the parameters of Tables 4 and 5. 3.5.2.1 Tensile Properties Shall be as shown in Tables 4 and 5 for product 0.125 inch (0.32 mm) and under in nominal thickness, determined in a
30、ccordance 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. Properties shall be verified for both precipitation heat treatment conditio
31、ns (See Tables 4 and 5). TABLE 4 - MINIMUM TENSILE PROPERTIES AFTER PRECIPITATION HEAT TREATMENT OF HEATING TO 950 F 10 (510 C 6), HOLDING AT HEAT FOR 8 HOURS 0.5, AND COOLING IN AIR OR FASTER Property Value Tensile Strength 145 ksi (1000 MPa) Yield Strength at 0.2% Offset 140 ksi ( 965 MPa) Elongat
32、ion in 2 Inches (50.8 mm) 7% TABLE 5 - MINIMUM TENSILE PROPERTIES AFTER PRECIPITATION HEAT TREATMENT OF HEATING TO 900 F 10 (482 C 6), HOLDING AT HEAT FOR 16 HOURS 0.5, AND COOLING IN AIR Property Value Tensile Strength 180 ksi (1241 MPa) Yield Strength at 0.2% Offset 170 ksi (1172 MPa) Elongation i
33、n 2 Inches (50.8 mm) 5% 3.5.2.1.1 Mechanical property requirements for product outside the range covered by 3.5.2.1 shall be agreed upon between purchaser and producer. 3.5.2.2 Average Grain Size Shall be ASTM No. 6 or finer, determined by comparison of a polished and etched specimen with the chart
34、in ASTM E 112. 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 excess of the flatness tolerances, ripples, and foreign materials and from imperfections detrimental to usage of the product. 3.7 Toleran
35、ces Except for flatness, shall conform to all applicable requirements of AMS2242. SAE INTERNATIONAL AMS4914F Page 5 of 7 3.7.1 Flatness shall be as shown in Table 6 TABLE 6 MAXIMUM DEVIATION FROM A HORIZONTAL FLAT SURFACE Specified Thickness Variation from Flat Inch Millimeters Inch Millimeters Up t
36、o 0.062, excl Up to 1.57, excl 2 51 0.062 to 0.1875, excl 1.57 to 4.762, excl 1 25 3.8 Production, distribution, and procurement of metal stock shall comply with AS6279. This requirement becomes effective October 1, 2015. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor o
37、f 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 product conforms to specified requirements. 4.2 Classificati
38、on of Tests All technical requirements are acceptance tests and shall be performed on each heat or lot as applicable. 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
39、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, Bending, Grain Size, and Surface Contamination Not less than one samp
40、le from each lot. 4.3.2.1 Specimens for tensile tests of widths 9 inches (229 mm) and over shall be taken and tested in both the longitudinal and long transverse directions; for widths under 9 inches (229 mm), specimens shall be taken in longitudinal direction. 4.4 Reports 4.4.1 The producer shall f
41、urnish with each shipment a report showing the producer identity, country where the metal was melted (i.e., final melt in the case of metal processed by multiple melting operations) and the results of tests for composition of each heat, for the hydrogen content and tensile and bending properties of
42、each lot, tensile properties and average grain size after precipitation heat treatment 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, AMS4914F, specific precipitation hardening tempera
43、ture used to develop properties, product form, size, and quantity. 4.4.2 When product size is outside the range designated in 1.1, the report shall contain a statement to that effect. SAE INTERNATIONAL AMS4914F Page 6 of 7 4.5 Resampling and Retesting If any specimen used in the above tests fails to
44、 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 specimen to meet the specified requirements shall be cause for rejection of the product represented. Results
45、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 commercial practice and in compliance with applicable rules and regulations pertaining to the handling, pack
46、aging, and transportation of the product to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A vendor 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
47、 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) symbo
48、l to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 Commercial corrosion-resistant steel finishes are defined in ASTM A 4
49、80/A 480M. 8.3 For nominal thicknesses under 0.1875 inch (4.762 mm), air cooling from the solution heat treatment temperature is usually satisfactory 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 which causes the sheet to buckle in that area. When the sheet is placed on a flat surface and hand pressure applied to the buckle
