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 2017 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:/standards.sae.org/AMS4916L AEROSPACE MATERIAL SPECIFICATION AMS4916 REV. L Issued 1966-03 Revised 2017-11 Superse
5、ding AMS4916K Titanium Alloy Sheet, Strip, and Plate 8Al - 1Mo - 1V Duplex Annealed (Composition similar to UNS R54810) RATIONALE AMS4916L results from a Five-Year Review and update of this specification that includes the addition of ASTM E539 and ASTM E2994 (3.1), removal of sample size allowance f
6、or hydrogen of Table 1 (covered by ASTM E1447), adds testing of material outside limits (3.5.1.1), addition of AMS6279 (3.8) and AMS2368 for Sampling and Resampling (4.3 and 4.5) and revises reporting (4.4) and marking (5.1). 1. SCOPE 1.1 Form This specification covers a titanium alloy in the form o
7、f sheet, strip, and plate up through 4.000 inches (101.60 mm) inclusive in thickness (see 8.6). 1.2 Application These products have been used typically for parts requiring strength and fracture toughness up to 800 F (427 C), but usage is not limited to such applications. 1.2.1 Certain processing pro
8、cedures 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 the purchase order forms a part of this specification
9、 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 published issue of that document shall apply. 2.1 SAE
10、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 USA), or www.sae.org. AMS2242 Tolerances, Corrosion and Heat Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Sheet, Strip,
11、 and Plate AMS2249 Chemical Check Analysis Limits, Titanium and Titanium Alloys SAE INTERNATIONAL AMS4916L Page 2 of 8 AMS2368 Sampling and Testing of Wrought Titanium Raw Material Except Forgings and Forging Stock AMS2631 Ultrasonic Inspection Titanium and Titanium Alloy Bar, Billet and Plate AMS27
12、50 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 Metals Specifications AS1814 Terminology for Titanium Microstructures AS4194 Sheet and Str
13、ip Surface Finish Nomenclature 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 19428-2959, Tel: 610-832-9585, or www.astm.org. ASTM A48
14、0/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 Material for Ductility ASTM E384 Microindentation Hardness of Materials ASTM E539 Analysis of Titanium Alloys by X-Ray Fluo
15、rescence Spectrometry 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 ASTM E1941 Determination of Carbon in
16、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 Alloys by Spark Atomic Emission Spectrometry an
17、d 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 nitrogen in accordance with ASTM E1409, an
18、d other elements in accordance with ASTM E539, ASTM E2371 or ASTM E2994. Other analytical methods may be used if acceptable to the purchaser. SAE INTERNATIONAL AMS4916L Page 3 of 8 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
19、.12 Carbon - 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 sh
20、all meet the applicable requirements of AMS2249. 3.2 Melting Practice Alloy shall be multiple melted. Melting cycle(s) prior to the final melting cycle shall be made using vacuum consumable electrode, nonconsumable electrode, electron beam cold hearth, or plasma arc cold hearth melting practice(s).
21、The final melting cycle shall be made using vacuum arc remelting (VAR) practice with no alloy additions permitted. 3.2.1 The atmosphere for nonconsumable electrode melting shall be vacuum or shall be inert gas at a pressure not higher than 1000 mm of mercury. 3.2.2 The electrode tip for nonconsumabl
22、e 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, duplex annealed, descaled, and leveled, having a surface appearance comparable to a commercial corrosi
23、on-resistant steel No. 2D finish (see 8.3). 3.3.2 Plate Hot rolled, duplex annealed, descaled, and flattened, having a surface appearance comparable to a commercial corrosion-resistant steel No. 1 finish (see 8.3). Plate product shall be produced using standard industry practices designed strictly f
24、or 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 duplex annealed by heating to a temperature within the range 1400 to 1450 F (760 to 788 C), holding at the selected temperatu
25、re within 25 F (14 C) for 1 to 8 hours, cooling at a rate not faster than 100 F (56 C) degrees per hour to below 900 F (482 C), cooling to room temperature, reheating to 1450 F 25 F (788 C 14 C), holding at heat for not less than 15 minutes, and cooling in air to room temperature. Pyrometry shall be
26、 in accordance with AMS2750. SAE INTERNATIONAL AMS4916L Page 4 of 8 3.5 Properties The product shall conform to the following requirements: 3.5.1 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 (0.00
27、5 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 Table 2A - Minimum tensile properties, inch/pound units Nominal Thickness Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 inche
28、s or 4D % 0.008 to 0.014, incl 135 120 6 Over 0.014 to 0.025, incl 135 120 8 Over 0.025 to 0.187, incl 135 120 10 Over 0.187 to 1.000, incl 130 120 10 Over 1.000 to 2.000, incl 125 115 10 Over 2.000 to 4.000, incl 120 110 8 Table 2B - Minimum tensile properties, SI units Nominal Thickness Millimeter
29、s Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 50.8 mm 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 4.75, incl 931 827 10 Over 4.75 to 25.40, incl 896 827 10 Over 25.40 to 50.80, incl 862 793 10 Over 50.80 to 101.60, incl 827 758 8 3.5.1
30、.1 Mechanical property requirements for product outside the range covered by 1.1 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 width, with its axis of b
31、ending parallel to the direction of rolling. The sample shall be bend tested in conformance with the 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 facto
32、r 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 factors Nominal Thickness Inch Nominal Thickness Millimeters Bend Factor Up to 0.070, incl Up to 1.78, incl 4 Over 0.070 to 0.18
33、75, excl Over 1.78 to 4.762, excl 4.5 SAE INTERNATIONAL AMS4916L Page 5 of 8 3.5.3 Microstructure Shall be that structure resulting from processing within the alpha-beta phase field. Microstructure shall conform to 3.5.3.1 or 3.5.3.2 (see 8.2). 3.5.3.1 Equiaxed and/or elongated primary alpha in a tr
34、ansformed beta matrix with no continuous network of alpha at prior beta grain boundaries. 3.5.3.2 Essentially complete field of equiaxed and/or elongated alpha with or without intergranular beta with no continuous network of alpha at prior beta grain boundaries. 3.5.4 Surface Contamination The produ
35、ct shall be free of any oxygen-rich layer, such as alpha case, or other surface contamination, determined as in 3.5.4.1, 3.5.4.2, 3.5.4.3, or by other method acceptable to purchaser. 3.5.4.1 The bend test of 3.5.2. 3.5.4.2 Examination of a metallographic cross section at 400X minimum magnification.
36、3.5.4.3 Hardness differential; a surface hardness more than 40 points higher than the subsurface hardness, determined in accordance with ASTM E384 on the Knoop scale using a 200-gram load, being evidence of unacceptable surface contamination. 3.6 Quality 3.6.1 The product, as received by purchaser,
37、shall be uniform in quality and condition, sound, and free from “oil cans” (see 8.4.1) with 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 to 4.000 inches (12.70 to 101.60 mm), incl, in nominal thic
38、kness, ultrasonically inspected in accordance with AMS2631, shall meet Class A1 of that specification. 3.7 Tolerances Shall conform to the following: 3.7.1 Thickness, Width, Length, and Straightness All applicable requirements of AMS2242. 3.7.2 Flatness Flatness tolerance for product 36 inches (914
39、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 (4.762 mm) in nominal thickness and over 36 inches (914 mm) in nominal width and f
40、or 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 from the expression 100H/L where “H” is the distance from the straight edge to the product at the point of greatest separation and “L”
41、 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 with AS6279. This requirement becomes effective June 1, 2019. SAE IN
42、TERNATIONAL AMS4916L Page 6 of 8 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The producer of the product shall supply all samples for producers tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any co
43、nfirmatory testing deemed necessary to ensure that the product conforms to 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 tolerances (3.7) are acceptance t
44、ests and shall be performed on each heat or lot as applicable. 4.2.1 Ultrasonic quality (3.6.2) of each plate, when required. 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 t
45、ime and duplex annealed in the same heat treat 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, Microstructure, and Surface Contaminatio
46、n One or more samples from each lot. 4.3.2.1 Specimens for tensile tests of widths 9 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 o
47、f rolling. 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. 4.3.3 Other Requirements As agreed upon by purchaser and producer. 4.4 Reports 4.4.1 The producer shall furnish with each shipment a report s
48、howing producer identity, country 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 hydrogen content, tensile and bending properties, and surface contamination of each lot, ultrasonic
49、quality when required, and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, lot number, AMS4916L, product form, size, and quantity. 4.4.2 When material produced to this specification is beyond the sizes allowed in the scope or tables, or other exceptions are taken to the technical requirements listed in Section 3, (see 5.1.1) the repo
