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 ther
2、efrom, 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 2017 SAE International All rights reserved. No part of this
3、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 and Canada) Tel: +1 724-776-49
4、70 (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:/standards.sae.org/AMS4915M AEROSPACE MATERIAL SPECIFICATION AMS4915 REV. M Issued 1966-03 Revised 2017-06 Supers
5、eding AMS4915L Titanium Alloy Sheet, Strip, and Plate 8Al - 1V - 1Mo Single Annealed (Composition similar to UNS R54810) RATIONALE AMS4915M results from a Five Year Review and update of this specification that includes the addition of ASTM E2994 (3.1), removal of sample size allowance for hydrogen o
6、f Table 1 (covered by ASTM E1447), requires agreement on tensile property values for material outside specification ranges (3.5.1.1.1), allows stricter ultrasonic testing to meet specification requirement (3.6.2), the addition of AS6279 (3.8) and AMS2368 for Sampling and Resampling (4.3 and 4.5), an
7、d revises reporting (4.4). 1. SCOPE 1.1 Form This specification covers a titanium alloy in the form of sheet, strip, and plate up to 4.000 inches (101.60 mm), inclusive. 1.2 Application These products have been used typically for parts requiring strength up to 800 F (427 C) where fracture toughness
8、is not critical, but usage is not limited to such applications. 1.2.1 Certain processing procedures and service conditions may cause these products to become subject to stress-corrosion cracking; ARP982 recommends practices to minimize such conditions. SAE INTERNATIONAL AMS4915M Page 2 of 9 2. APPLI
9、CABLE 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. When the referenced document
10、 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) or +1 724-776-4970 (outside U
11、SA), 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, Except Forgings and Forging Sto
12、ck AMS2631 Ultrasonic Inspection Titanium and Titanium Alloy Bar, Billet and Plate AMS2750 Pyrometry AMS2809 Identification Titanium and Titanium Alloy Wrought Products ARP982 Minimizing Stress-Corrosion Cracking in Wrought Titanium Alloy Products ARP1917 Clarification of Terms Used in Aerospace Met
13、als Specifications AS1814 Terminology for Titanium Microstructures AS4194 Sheet and Strip Surface Finish Nomenclature AS6279 Standard Practice for Production, Distribution, and Procurement of Metal Stock 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, W
14、est Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM A480/A480M General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip ASTM E8/E8M Tension Testing of Metallic Materials ASTM E290 Bend Testing of Material for Ductility ASTM E384 Microindentat
15、ion Hardness of Materials ASTM E1409 Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by Inert Gas Fusion ASTM E1447 Determination of Hydrogen in Titanium and Titanium Alloys by the Inert Gas Fusion Thermal Conductivity/Infrared Detection Method SAE INTERNATIONAL AMS4915M Page 3
16、of 9 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 Current Plasma and Inductively Coupled Plasma Atomic Emission Spectrometry ASTM E2994 Analysis of Titanium and Titanium Allo
17、ys by Spark Atomic Emission Spectrometry and Glow Discharge 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
18、 nitrogen in accordance with ASTM E1409, and other elements in accordance with ASTM E2371 or ASTM E2994. Other analytical methods may be used if acceptable to the purchaser. Table 1 - Composition Element Min Max Aluminum 7.35 8.35 Molybdenum 0.75 1.25 Vanadium 0.75 1.25 Iron - 0.30 Oxygen - 0.12 Car
19、bon - 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 mee
20、t 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 using
21、 vacuum arc remelting (VAR) practice. Alloy additions are not permitted in the final VAR melt. 3.2.1 The atmosphere for non-consumable electrode melting shall be vacuum, or argon and/or helium at an absolute pressure not higher than 1000 mm of mercury. 3.2.2 The electrode for nonconsumable electrode
22、 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 to a commercial corrosion-resistant steel
23、 No. 2D finish (see 8.2). SAE INTERNATIONAL AMS4915M Page 4 of 9 3.3.2 Plate Hot rolled, annealed, descaled, and flattened, having a surface appearance comparable to a commercial corrosion-resistant steel No. 1 finish (see 8.2). Plate product shall be produced using standard industry practices desig
24、ned strictly for the production of plate stock to 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 1400 to 1450 F (760 to 788 C), holding at the selected temper
25、ature within 25 F (14 C) for 1 to 8 hours, cooling at a rate not faster than 100 F (56 C) per hour to below 900 F (482 C), and cooling to room temperature. Pyrometry shall be in accordance with AMS2750. 3.5 Properties The product shall conform to the following requirements: 3.5.1 As Annealed 3.5.1.1
26、 Tensile Properties Shall 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 2 Ta
27、ble 2A - Minimum tensile properties, inch/pound units Nominal Thickness Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 inch or 4D % 0.008 to 0.014, incl 145 135 6 Over 0.014 to 0.025, incl 145 135 8 Over 0.025 to 0.500, incl 145 135 10 Over 0.500 to 1.000, incl 140 130
28、 10 Over 1.000 to 2.500, incl 130 120 10 Over 2.500 to 4.000, incl 120 110 8 Table 2B - Minimum tensile properties, SI units Nominal Thickness Millimeters Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation 50.8 mm or 4D % 0.20 to 0.36, incl 1000 931 6 Over 0.36 to 0.64, incl 1000 931
29、8 Over 0.64 to 12.70, incl 1000 931 10 Over 12.70 to 25.40, incl 965 896 10 Over 25.40 to 63.50, incl 896 827 10 Over 63.50 to 101.60, incl 827 758 8 SAE INTERNATIONAL AMS4915M Page 5 of 9 3.5.1.1.1 Tensile property requirements for product outside the size range covered by 1.1 shall be agreed upon
30、between purchaser and producer. 3.5.1.2 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 shall be bend tested in conformance with the
31、 guided bend test defined in ASTM E290 through an angle of 105 degrees. The test fixture supports shall have a contact radius 0.010 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 eviden
32、ce of cracking when examined at 15 to 25X magnification. Table 3 - Bend factors Nominal Thickness Inches Nominal Thickness Millimeters Bend Factors Up to 0.070, incl Up to 1.78, incl 4.5 Over 0.070 to 0.1875, excl Over 1.78 to 4.762, excl 5 3.5.1.3 Microstructure Shall be that structure resulting fr
33、om processing within the alpha-beta phase field. Microstructure shall conform to 3.5.1.3.1 or 3.5.1.3.2 (see 8.3). 3.5.1.3.1 Equiaxed and/or elongated primary alpha in a transformed beta matrix with no continuous network of alpha at prior beta grain boundaries. 3.5.1.3.2 Essentially complete field o
34、f equiaxed and/or elongated alpha with or without intergranular beta and with no continuous network of alpha at prior beta grain boundaries. 3.5.1.4 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
35、of the following: 3.5.1.4.1, 3.5.1.4.2, 3.5.1.4.3, or by other method agreed upon by purchaser and producer. 3.5.1.4.1 The bend test of 3.5.1.2. 3.5.1.4.2 Microscopic examination at 400X magnification. 3.5.1.4.3 Hardness difference; a surface hardness more than 40 points higher than the subsurface h
36、ardness, determined in accordance with ASTM E384 on the Knoop scale using a 200 gram load, being evidence of unacceptable surface contamination. 3.5.2 After Reannealing Samples from product shall meet the requirements of Table 4 after being heated to 1450 F 25 F (788 C 14 C), held at heat for 15 min
37、utes 1 minute, cooled in air, and descaled. Tensile testing shall be in accordance 3.5.1.1. SAE INTERNATIONAL AMS4915M Page 6 of 9 Table 4 Table 4A - Minimum tensile properties, inch/pound units Nominal Thickness Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 in. or 4D
38、 % 0.008 to 0.014, incl 135 120 6 Over 0.014 to 0.025, incl 135 120 8 Over 0.025 to 0.500, incl 135 120 10 Over 0.500 to 1.000, incl 130 120 10 Over 1.000 to 2.500, incl 125 115 10 Over 2.500 to 4.000, incl 120 110 8 Table 4B - Minimum tensile properties, SI units Nominal Thickness Millimeters Tensi
39、le Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 2 in. or 4D % 0.20 to 0.36, incl 931 827 6 Over 0.36 to 0.64, incl 931 827 8 Over 0.64 to 12.70, incl 931 827 10 Over 12.70 to 25.40, incl 896 827 10 Over 25.40 to 63.50, incl 862 793 10 Over 63.50 to 101.60, incl 827 758 8 3.6 Quality
40、3.6.1 The product, as received by purchaser, shall be uniform in quality and condition, sound, and free from “oil cans“ (see 8.4.1) of depth in excess of flatness tolerances, ripples, and foreign materials and from imperfections detrimental to usage of the product. 3.6.2 Plate 0.500 inches (12.70 mm
41、) and over in nominal thickness shall be ultrasonically inspected in accordance with AMS2631 and shall meet Class A1 of that specification. If product passes a more stringent class such as Class AA, there is no need to re-test or re-certify. 3.7 Tolerances Shall conform to the following: 3.7.1 Thick
42、ness, 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 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), exc
43、lusive. Flatness tolerance for product under 0.1875 inch (4.762 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 producer. 3.7.2.1 Flatness shall be determined fro
44、m the expression 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. SAE INTERNA
45、TIONAL AMS4915M Page 7 of 9 3.8 Production, distribution, and procurement of metal stock shall comply with AS6279. This requirement becomes effective November 1, 2018 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The producer of the product shall supply all samples for producers
46、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 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1
47、), tensile properties (3.5.1.1), bending (3.5.1.2), microstructure (3.5.1.3), surface contamination (3.5.1.4), ultrasonic quality (3.6.2), and tolerances (3.7) are acceptance tests and shall be performed on each heat or lot as applicable. 4.2.2 Periodic Tests Tensile properties after reannealing (3.
48、5.2) are periodic tests and shall be performed at a frequency selected by the producer unless frequency of testing is specified by purchaser. 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 process
49、ed at the same time and annealed in the same heat treatment batch: 4.3.1 For Acceptance Tests 4.3.1.1 Composition One sample from each heat, except that for hydrogen determinations one sample from each lot obtained after thermal and chemical processing is completed. 4.3.1.2 Tensile Properties, Bending, Microstructure, and Surface Contamination as Annealed At least one sample from each lo
