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 2013 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/AMS4907K AEROSPACE MATERIAL SPECIFICATION AMS4907 REV. K Issued 1965-09 Revised 2
5、013-09 Superseding AMS4907J Titanium Alloy, Sheet, Strip, and Plate 6.0Al - 4.0V, Extra Low Interstitial Annealed (Composition similar to UNS R56401) RATIONALE AMS4907K results from a Five Year Review and update of this specification. 1. SCOPE 1.1 Form This specification covers a titanium alloy in t
6、he form of sheet, strip, and plate on product 0.008 to 3.000 inches (0.20 to 76.20 mm), inclusive in thickness. 1.2 Application These products have been used typically for parts requiring a combination of weldability, ductility, and good notch-toughness down to -423 F (-253 C), but usage is not limi
7、ted to such applications. 1.3 Certain processing procedures and service conditions may cause these products to become subject to stress-corrosion cracking; ARP982 recommends practices to minimize such conditions. 2. APPLICABLE DOCUMENTS: The issue of the following documents in effect on the date of
8、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 last p
9、ublished 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 Tolerances, Corrosion and Heat Resistant Steel, Iron Al
10、loy, Titanium, and Titanium Alloy Sheet, Strip, and Plate AMS2249 Chemical Check Analysis Limits, Titanium and Titanium Alloys SAE INTERNATIONAL AMS4907K Page 2 of 9 AMS2631 Ultrasonic Inspection, Titanium and Titanium Alloy Bar and Billet AMS2750 Pyrometry AMS2809 Identification, Titanium and Titan
11、ium Alloy Wrought Products ARP982 Minimizing Stress-Corrosion Cracking in Wrought Titanium Alloy Products 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 E 8 / E 8M Tension Testing
12、of Metallic Materials ASTM E 290 Bend Testing of Material for Ductility ASTM E 384 Knoop and Vickers Hardness of Materials ASTM E 539 X-Ray Emission Spectrometric Analysis of 6Al-4V Titanium Alloy ASTM E 1409 Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by the Inert Gas Fusio
13、n 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 ASTM E 2371 Analysis of Titanium and Titanium Alloys by Dire
14、ct Current Plasma and Inductively Coupled Atomic Emission Plasma 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 1941, hydrogen in accordance with ASTM E 1447, oxygen and nitrogen
15、 in accordance with ASTM E 1409, and other elements in accordance with ASTM E 539 or ASTM E 2371. Other analytical methods may be used if acceptable to the purchaser. TABLE 1 - COMPOSITION Element min max Aluminum Vanadium Iron Oxygen Carbon Nitrogen Hydrogen Yttrium Other Elements, each (3.1.1) Oth
16、er Elements, total (3.1.1) Titanium 5.50 3.50 - - - - - - - - remainder 6.50 4.50 0.25 0.13 0.08 0.05 (500 ppm) 0.0125 (125 ppm) 0.005 ( 50 ppm) 0.10 0.30 SAE INTERNATIONAL AMS4907K Page 3 of 9 3.1.1 Determination not required for routine acceptance. 3.1.2 Check Analysis Composition variations shall
17、 meet the applicable requirements of AMS2249. 3.2 Melting Practice 3.2.1 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
18、made under vacuum using vacuum arc remelting (VAR) practice. Alloy additions are not permitted in the final melt cycle. 3.2.1.1 The atmosphere for nonconsumable electrode melting shall be vacuum, or shall be argon and/or helium at an absolute pressure not higher than 1000 mm of mercury. 3.2.1.2 The
19、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 subsequent cold reduction, annealed, descaled, and leveled, having a surface appearance comparable
20、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 No. 1 finish (See 8.2). Plate product shall be produced using standard industry practices designed strictly for the production of
21、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 heating to a temperature within the range 1300 to 1650 F (704 to 899 C), holding at the selected temperature within 25 F (14 C) for a
22、time commensurate with product thickness and heating equipment and procedure used, 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 as produced product shall conform to the following requirements and s
23、hall also meet the requirements of 3.5.1 and 3.5.2 after being heated in air to 1325 F 25 (720 C 14), held at heat for 20 minutes 2, cooled at a rate equivalent to an air cool or slower, and descaled. 3.5.1 Tensile Properties Shall be as specified in Table 2 on product 0.008 to 3.000 inches (0.20 to
24、 76.20 mm), inclusive, 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. SAE INTERNATION
25、AL AMS4907K Page 4 of 9 TABLE 2A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITS Nominal Thickness Inches Tensile Strength ksi Yield Strength At 0.2% Offset ksi Elongation in 2 Inches or 4D % 0.008 to 0.015, excl 0.015 to 0.025, excl 0.025 to 1.000, excl 1.000 to 3.000, incl 130 130 130 125 120.0 120
26、.0 120.0 115.0 6 8 10 10 TABLE 2B - MINIMUM TENSILE PROPERTIES, SI UNITS Nominal Thickness Millimeters Tensile Strength MPa Yield Strength At 0.2% Offset MPa Elongation in 50.8 mm or 4D % 0.20 to 0.38, excl 0.38 to 0.64, excl 0.64 to 25.40, excl 25.40 to 76.20, incl 896 896 896 862 827 827 827 793 6
27、 8 10 10 3.5.1.1 Mechanical property requirements for product outside the size range covered by Table 2 shall be agreed upon between purchaser and producer. 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 w
28、idth, with its axis of bending parallel to the direction of rolling. The sample shall 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 sha
29、ll 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 cracking when examined at 15 to 25X magnification. TABLE 3 - BEND FACTOR Nominal Thickness Inch Nominal Thickness Millimeters Bend Factor Up to 0.070, inc
30、l Over 0.070 to 0.1875, excl Up to 1.78, incl Over 1.78 to 4.762, excl 4.5 5 3.5.3 Notched/Unnotched Tensile Ratio Tensile specimens shown in Figure 1 and Figure 2, tested at -423 F 3 (-253 C 2), shall have a notched/unnotched tensile ratio of not less than 0.75. Testing shall be performed with the
31、specimen held in liquid hydrogen or other appropriate cooling media for a time, commensurate with the size of the specimen, necessary to equalize at test temperature prior to testing. 3.5.4 Microstructure Shall be that structure resulting from alpha-beta processing. Microstructure shall conform to 3
32、.5.4.1, or 3.5.4.2, or 3.5.4.3, or 3.5.4.4. A microstructure showing a continuous network of alpha in prior beta grain boundaries is not acceptable. 3.5.4.1 Lamellar alpha with some equiaxed alpha in a transformed beta matrix. 3.5.4.2 Equiaxed alpha in a transformed beta matrix. 3.5.4.3 Equiaxed alp
33、ha and elongated alpha in a transformed beta matrix. 3.5.4.4 Partially broken and distorted grain boundary alpha with plate-like alpha. SAE INTERNATIONAL AMS4907K Page 5 of 9 3.5.5 Surface Contamination The product shall be free of any oxygen-rich layer, such as alpha case, or other surface contamin
34、ation, determined as in 3.5.5.1, 3.5.5.2, 3.5.5.3, or other method acceptable to purchaser. 3.5.5.1 The bend test of 3.5.2. 3.5.5.2 Microscopic examination at 400X minimum. 3.5.5.3 Hardness differential; a surface hardness more than 40 points higher than the subsurface hardness, determined in accord
35、ance with ASTM E 384 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 8.3.1) of depth in excess of the flatness tolerance,
36、 ripples, and foreign materials and from imperfections detrimental to usage of the product. 3.6.1 Plate 0.500 inches (12.70 mm) and over in nominal thickness shall meet Class A1 requirements when ultrasonically inspected in accordance with AMS2631. 3.7 Tolerances Shall be as follows: 3.7.1 Thickness
37、, Width, Length, and Straightness All applicable requirements 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 less than 0.025 inch (0.64 mm) and 3% if nominal thickness is 0.025 to 0.1875 inch (0.64 to 4.762 mm), exc
38、lusive. Flatness tolerance for product under 0.1875 inch (4.762 mm) in nominal thickness and over 36 inches (914 mm) wide and for product 0.1875 inch (4.762 mm) and over in nominal thickness in all widths shall be agreed upon by purchaser and vendor. 3.7.2.1 Flatness shall be determined from the exp
39、ression 100H/L where “H“ is the distance from the straight 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. 3.7.2.3 Special flat
40、ness may be specified for plate, in which case the special flatness tolerances of AMS2242 apply. 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.
41、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 4.2.1 Acceptance Tests Composition (3.1), condition (3.3), tensile properties (3.5.1), bending (3.5.2), microstru
42、cture (3.5.4), surface contamination (3.5.5), quality (3.6), and tolerances (3.7) are acceptance tests and shall be performed on each heat or lot as applicable. SAE INTERNATIONAL AMS4907K Page 6 of 9 4.2.1.1 Ultrasonic quality (3.6.1) of each plate, when required. 4.2.2 Periodic Tests The following
43、requirements are periodic tests and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser: 4.2.2.1 Notch/unnotched tensile ratio (3.5.3) of the product. 4.2.2.2 Tensile (3.5.1) and bending (3.5.2) properties of product after reheating to 1325
44、F 25 (720 C 14). 4.3 Sampling and Testing Shall be in accordance with the following; a lot shall be all product of the same nominal size from the same heat processed at the same time: 4.3.1 For Acceptance Tests 4.3.1.1 Composition One sample from each heat, except that for hydrogen determinations on
45、e sample from each lot obtained after thermal and chemical processing is completed. 4.3.1.2 Tensile Property, Bending, Microstructure, and Surface Contamination Requirements One or more samples from each lot for each requirement. 4.3.1.2.1 Specimens for tensile and notch-tensile tests from widths 9
46、inches (229 mm) and over shall be taken with the axis of the specimen perpendicular to the direction of rolling; for widths under 9 inches (229 mm), specimens shall be taken with the axis parallel to the direction of rolling. Specimens from product under 2 inches (50.8 mm) in width shall be agreed u
47、pon by purchaser and vendor. 4.3.1.2.2 For U-channel bend tests, specimen width shall be not less than 10 times the nominal thickness but not less than 1 inch (25 mm). For free bend tests, minimum specimen width shall, when possible, be not less than 10 times the nominal thickness; maximum width nee
48、d not be greater than 1 inch (25 mm). 4.3.2 For Periodic Tests As selected by the vendor to ensure conformance, unless specified by purchaser. 4.4 Reports 4.4.1 The producer shall furnish with each shipment a report showing the producer identity and country where the metal was melted (i.e., final me
49、lt in the case of metal processed by multiple melting operations) and 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 inspection of each plate, when required, and when performed, the results of tests to determine conformance to the periodic test requirements, and stating that the product co
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