1、AEROSPACE MATERIAL SPECIFICATION AMS4900 REV. P Issued 1952-11 Revised 2014-10 Superseding AMS4900N Titanium Sheet, Strip, and Plate Commercially Pure Annealed, 55 ksi (379 MPa) Yield Strength (Composition similar to UNS R50550) RATIONALE AMS4900P results from a Five Year Review and update of this s
2、pecification that revises the wording of the melting practices (3.2.1) and agreement of testing material outside the sizes of 1.1 (3.5.1.2), includes the addition of AS6279 (3.8) and AMS2368 to sampling (4.3) and revises the report paragraph (4.4). 1. SCOPE 1.1 Form This specification covers one gra
3、de of commercially-pure titanium in the form of sheet, strip, and plate 1.000 inch (25.40 mm) and under in nominal thickness. 1.2 Application This material has been used typically for parts requiring strength up to 400 F (204 C) and oxidation resistance up to 600 F (316 C), but usage is not limited
4、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 issue is specified
5、. 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 (inside USA and Canada)
6、 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 Titanium Raw Material, Ex
7、cept 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 use, including any p
8、atent 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 International All ri
9、ghts 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: 877-606-7323 (inside USA
10、 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/AMS4900P SAE INTERNATIONAL AMS4900P Page 2 of 6 A
11、MS2750 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 Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 1
12、9428-2959, 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 384 Knoop and Vickers Hardness of Materials ASTM E 1409 Determination of Oxygen and Nitrogen in Titaniu
13、m 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 by Combustion An
14、alysis 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 accordance with ASTM E
15、 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 Iron Oxygen Carbon Nitrogen Hydrogen Other
16、 Elements, each (3.1.1) Other Elements, total (3.1.1) Titanium - - - - - - - remainder 0.30 0.30 0.08 0.05 0.015 0.10 0.30 (500 ppm) (150 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 I
17、NTERNATIONAL AMS4900P Page 3 of 6 3.2 Melting Practice 3.2.1 Alloy shall be produced by electron beam cold hearth or plasma arc cold hearth melting practice, or shall be multiple melted. When multiple melted, the first melt shall be made using a vacuum consumable electrode, nonconsumable electrode,
18、electron beam cold hearth, or plasma arc cold hearth melting practice. The subsequent melt or melts shall be made using vacuum arc remelting (VAR) practice. Alloy additions are not permitted in the final remelt. 3.2.1.1 The atmosphere for nonconsumable electrode melting shall be vacuum or shall be a
19、rgon 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 without subsequ
20、ent 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-resistant steel N
21、o. 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 Annealing The product shall be annealed by heati
22、ng to a temperature within the range 1200 to 1500 F (649 to 816 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 to produce product capable of meeting requirements of 3.5. Pyrom
23、etry shall be in accordance with AMS2750. 3.5 Properties The product shall conform to the following requirements: 3.5.1 Tensile Properties Shall be in accordance with Table 2 for product 1 inch (25.4 mm) and under in nominal thickness, determined in accordance with ASTM E 8 / E 8M with the rate of s
24、train 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 Property Value Tensile Strength, minimum Yield Strength at 0.2% Offset Elongation in 2 Inches (
25、50.8 mm) or 4D, minimum 65 ksi (448 MPa) 55 to 80 ksi (379 to 552 MPa) 18% 3.5.1.1 Elongation requirement applies only to product 0.025 inch (0.64 mm) and over in nominal thickness. 3.5.1.2 Tensile property requirements for product outside the range covered by 3.5.1 shall be agreed upon between prod
26、ucer and purchaser. SAE INTERNATIONAL AMS4900P Page 4 of 6 3.5.2 Bending Product under 0.1875 inch (4.76 mm) in nominal thickness shall withstand, without evidence of cracking when examined at 20X magnification, bending at room temperature in accordance with ASTM E 290 through an angle of 105 degree
27、s around a radius equal to the bend factor shown in Table 3 times the nominal thickness of the product with the axis of bend parallel to the direction of rolling. In case of dispute, results of bend tests using the end supported guided bend test procedure shall govern. TABLE 3 - BEND FACTORS Nominal
28、 Thickness Inch Nominal Thickness Millimeters Bend Factor Up to 0.070, incl Over 0.070 to 0.1875, excl Up to 1.78, incl Over 1.78 to 4.762, excl 2 2.5 3.5.3 Average Grain Size Shall be 6 or finer, determined on a polished and etched specimen in accordance with ASTM E 112. 3.5.4 Surface Contamination
29、 The product shall be free of any oxygen-rich layer, such as alpha case, or other surface contamination, determined as in 3.5.4.1 or 3.5.4.2 or by other method acceptable to purchaser. 3.5.4.1 The bend test of 3.5.2. 3.5.4.2 Hardness differential; a surface hardness more than 40 points higher than t
30、he subsurface hardness, determined in accordance with ASTM E 384 on the Knoop scale using a 200-gram load, is 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 8.3.1) of d
31、epth in excess of the flatness tolerances, ripples, and foreign materials and from imperfections detrimental to usage of the product. 3.7 Tolerances In accordance with AMS2242. 3.8 Production, distribution, and procurement of metal stock shall comply with AS6279. This requirement becomes effective A
32、pril 1, 2016 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 sample and to perform any confirmatory testing deeme
33、d necessary to ensure that the product conforms to specified requirements. 4.2 Classification 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
34、 be all product of the same nominal thickness from the same ingot processed at the same time and annealed in the same heat treatment batch. SAE INTERNATIONAL AMS4900P Page 5 of 6 4.3.1 Composition One sample from the top and bottom of each ingot, except that samples for hydrogen determinations shall
35、 be obtained from each lot obtained after thermal and chemical processing is completed. For coil produced product, at least one hydrogen analysis shall be taken from material representative of each end of the continuously processed coil. For multiple plate and individually rolled sheet product, at l
36、east one hydrogen analysis shall be taken from two master plates or sheets produced in the lot. For pack rolled sheet product, at least one sample shall be taken from material representative of each pack. 4.3.2 Tensile Property, Bending, Grain Size, and Surface Contamination Requirements For coil pr
37、oduced product, at least one sample shall be taken from material representative of each end of the continuously processed coil. For multiple plate and individually rolled sheet product, at least one sample shall be taken from two master plates or sheets produced in the lot. For pack rolled sheet pro
38、duct, at least one sample shall be taken from material representative of each pack. 4.3.2.1 Specimens for tensile tests of widths 9 inches (229 mm) and over shall be taken with specimen axis in both the longitudinal and long-transverse directions; for widths under 9 inches (229 mm), specimens shall
39、be taken with the specimen axis in the longitudinal direction. 4.3.2.2 For guided bend tests, specimen width shall be not less than 10 times the nominal thickness or 1 inch (25 mm), whichever is greater. For free bend tests, minimum specimen width shall, when possible, be not less than 10 times the
40、nominal thickness; maximum width need not be greater than 1 inch (25 mm). 4.4 Reports 4.4.1 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 multiple melting operations), the resul
41、ts of tests for composition taken from both the top and bottom of each ingot, the hydrogen content, tensile and bending properties and grain size of each lot, and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, lot number, A
42、MS4900P, product form, size, specific annealing treatment used, and quantity. 4.4.2 When the product size is outside the range covered by Table 2, the report shall contain a statement to that effect. 4.5 Resampling and Retesting If any specimen used in the above tests fails to meet the specified req
43、uirements, 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 of all tests shall be r
44、eported. 5. PREPARATION FOR DELIVERY 5.1 Identification 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, packaging, and transportation of the
45、 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. SAE INTERNATIONAL AMS4900P Page 6 of 6 7. REJECTIONS Product not conforming to this specificat
46、ion, 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
47、) symbol 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 A
48、STM A 480/A 480M and AS4194. 8.3 Terms used in AMS are clarified in ARP1917 and as follows: 8.3.1 “Oil Can“ An excess of material in a localized area of a sheet that causes the sheet to buckle in that area. When the sheet is placed on a flat surface and hand pressure applied to the buckle, the buckl
49、e will spring through to the opposite surface or spring up in another area of the sheet. 8.4 Dimensions and properties in inch/pound units and the Fahrenheit temperatures 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. 8.5 Purchase documents should specify not less than the following: AMS4900
