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/AMS4919H AEROSPACE MATERIAL SPECIFICATION AMS4919 REV. H Issued 1978-04 Revised 2
5、014-05 Superseding AMS4919G Titanium Alloy Sheet, Strip, and Plate 6Al - 2Sn - 4Zr - 2Mo - 0.08Si Duplex Annealed (Composition similar to UNS R56420) RATIONALE AMS4919G results from a Five Year Review and update of this specification that includes the removal of sample size allowance for hydrogen of
6、 Table 1, ultrasonic testing of all plate 0.500 inch (12.7 mm) and over (3.6.2), the addition of 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, strip, and plate 0.025 to 3.000 inches (0.64 to 7
7、6.20 mm), inclusive, in nominal thickness. 1.2 Application These products have been used typically for parts requiring a combination of high strength and toughness and good creep resistance up to 1000 F (538 C) but usage is not limited to such applications. 1.2.1 Certain processing procedures and se
8、rvice 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 to the extent
9、 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 Publications A
10、vailable 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 Alloy, Titanium, and Titanium Alloy Sheet, Strip, and Plate AMS2249 C
11、hemical Check Analysis Limits, Titanium and Titanium Alloys SAE INTERNATIONAL AMS4919H Page 2 of 8 AMS2368 Sampling and Testing of Wrought Titanium Raw Materials, Except Forging and Forging Stock AMS2631 Ultrasonic Inspection, Titanium and Titanium Alloy Bar and Billet AMS2750 Pyrometry AMS2809 Iden
12、tification, Titanium and Titanium Alloy Wrought Products ARP982 Minimizing Stress-Corrosion Cracking in Wrought Titanium Alloy Products AS6279 Industry Standard Practices for Production, Distribution, and Procurement of Metal Stock 2.2 ASTM Publications Available from ASTM International, 100 Barr Ha
13、rbor 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 21 Elevated Temperature Tension Tests of Metallic Materials ASTM E 290 Bend Testing of Material for Ductility ASTM E 384 Knoop and Vickers Hardne
14、ss of Materials ASTM E 1409 Determination of Oxygen and Nitrogen 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
15、 Carbon in Refractory and Reactive Metals and Their Alloys by Combustion Analysis ASTM E 2371 Analysis of Titanium and Titanium Alloys by Direct Current Plasma and Inductively Coupled Atomic Emission Spectrometry 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight sh
16、own in Table 1; carbon shall be determined in accordance 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. SAE INTERNAT
17、IONAL AMS4919H Page 3 of 8 TABLE 1 - COMPOSITION Element min max Aluminum 5.50 6.50 Zirconium 3.60 4.40 Molybdenum 1.80 2.20 Tin 1.80 2.20 Silicon 0.06 0.10 Iron - 0.25 Oxygen - 0.12 Carbon - 0.05 Nitrogen - 0.05 (500 ppm) Hydrogen - 0.0150 (150 ppm) Yttrium (3.1.1) - 0.005 ( 50 ppm) Residual Elemen
18、ts, each (3.1.1) - 0.10 Residual Elements, total (3.1.1) - 0.30 Titanium remainder 3.1.1 Determination not required for routine acceptance. 3.1.2 Check Analysis Composition variations shall meet the applicable requirements of AMS2249. 3.2 Quality 3.2.1 Alloy shall be multiple melted. Melting cycle(s
19、) prior to the final melting cycle shall be by vacuum consumable electrode, nonconsumable electrode, electron beam cold hearth, or plasma arc cold hearth melting practice(s). The final melting cycle shall be made under vacuum using vacuum arc remelting (VAR) with no alloy additions permitted. 3.2.1.
20、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. 3.2.1.2 The electrode tip for nonconsumable electrode melting shall be water-cooled copper. 3.3 Condition The product shall be supplied in the following condit
21、ion: 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 corrosion-resistant steel No. 2D finish (See 8.2). 3.3.2 Plate Hot rolled, duplex annealed, descaled, and flattened, having
22、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 designed strictly for the production of plate stock to the procured thickness. Bar, billet, forgings, or forging stock shall not be supp
23、lied in lieu of plate. 3.4 Heat Treatment The product shall be duplex annealed as follows; pyrometry shall be in accordance with AMS2750. SAE INTERNATIONAL AMS4919H Page 4 of 8 3.4.1 Product under 0.1875 inch (4.762 mm) in nominal thickness shall be heated to 1650 F 25 (899 C 14), held at heat for 3
24、0 minutes cooled in air to room temperature, reheated to 1450 F 25 (788 C 14), held at heat for 15 minutes, and cooled in air to room temperature. 3.4.2 Product 0.1875 inch (4.762 mm) and over in nominal thickness shall be heated to 1650 F 25 (899 C 14), held at heat for 60 minutes, cooled in air to
25、 room temperature, reheated to 1100 F 25 (593 C 14), held at heat for 8 hours, and cooled in air to room temperature. 3.4.3 Heat treating time tolerances shall be commensurate with heating equipment and procedure used to produce product meeting the requirements of 3.5. 3.5 Properties The product sha
26、ll conform to the following requirements: 3.5.1 Tensile Properties (See 8.3) 3.5.1.1 At Room Temperature Shall be as specified in Table 2, determined in accordance with ASTM E 8 / E 8M on specimens as in 4.3.1.2.1 from product 0.025 to 3.000 inches (0.64 to 76.20 mm), inclusive, in nominal thickness
27、, 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 2A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITS Nominal Thickness Inches Tensile Strength ksi Yi
28、eld Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D % 0.025 to 0.062, incl 135 125 8 Over 0.062 to 1.000, incl 135 125 10 Over 1.000 to 3.000, incl 130 120 10 TABLE 2B - MINIMUM TENSILE PROPERTIES, SI UNITS Nominal Thickness Millimeters Tensile Strength MPa Yield Strength at 0.2% Offset MPa
29、 Elongation in 50.8 mm or 4D % 0.64 to 1.57, incl 931 862 8 Over 1.57 to 25.40, incl 931 862 10 Over 25.40 to 76.20, incl 896 827 10 3.5.1.2 At 900 F (482 C) Shall be as specified in Table 3 for product 0.025 to 3.000 inch (0.64 to 76.20 mm), inclusive, in nominal thickness, determined in accordance
30、 with ASTM E 21 on specimens as in 4.3.1.2.1 heated to 900 F 10 (482 C 6), held at heat for 20 to 30 minutes before testing, and tested at 900 F 10 (482 C 6) using strain rates as specified in 3.5.1.1. TABLE 3A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITS Nominal Thickness Inches Tensile Strength
31、ksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D % 0.025 to 0.062, incl 95 75 7 Over 0.062 to 2.000, incl 95 75 10 Over 2.000 to 3.000, incl 90 70 10 SAE INTERNATIONAL AMS4919H Page 5 of 8 TABLE 3B - MINIMUM TENSILE PROPERTIES, SI UNITS Nominal Thickness Millimeters Tensile Strengt
32、h MPa Yield Strength at 0.2% Offset MPa Elongation in 50.8 mm or 4D % 0.64 to 1.57, incl 655 517 7 Over 1.57 to 50.80, incl 655 517 10 Over 50.80 to 76.20, incl 621 483 10 3.5.1.3 Mechanical property requirements for product outside the range covered by Tables 2 and 3 shall be agreed upon between pu
33、rchaser 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 bending parallel to the direction of rolling. The sample shall be bend tested at room temperature in conformance
34、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 minimum, and the plunger shall have a radius equal to the bend factor shown in Table 4 times the nominal thickness. Examination of the bent sample shall not sh
35、ow evidence of cracking when examined at 15 to 25X magnification. TABLE 4 - BEND FACTOR Nominal Thickness Inch Nominal Thickness Millimeters Bend Factor Up to 0.070, incl Up to 1.78, incl 4.5 0.070 to 0.1875, excl 1.78 to 4.762, excl 5 3.5.3 Microstructure Shall be that structure resulting from alph
36、a-beta processing. Microstructure shall conform to 3.5.3.1, 3.5.3.2, or 3.5.3.3. 3.5.3.1 Equiaxed and/or elongated primary alpha in a transformed beta matrix with no continuous network of alpha at prior beta grain boundaries. 3.5.3.2 Essentially complete field of equiaxed and/or elongated alpha with
37、 no continuous network of alpha at prior beta grain boundaries. 3.5.3.3 Partially broken and distorted grain boundary alpha with plate-like alpha. 3.5.3.4 A microstructure showing a continuous network of alpha in prior beta grain boundaries is not acceptable. 3.5.4 Surface Contamination The product
38、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 other method agreed upon by purchaser and vendor. Isolated local areas of alpha case are acceptable on plate. 3.5.4.1 The bend test of 3.5.2. 3.5.4.2 Hardness different
39、ial; a surface hardness more than 40 points higher than the 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 co
40、ndition, sound, and free from oil cans (See 8.4.1) of depth in excess of the flatness tolerances, ripples, foreign materials, and from imperfections detrimental to usage of the product. SAE INTERNATIONAL AMS4919H Page 6 of 8 3.6.1 Plate 0.500 inch (12.70 mm) and over in nominal thickness shall be ul
41、trasonically inspected in accordance with AMS2631 and shall meet the Class A1 requirements of AMS2631. 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
42、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) wide and for product 0
43、.1875 inch (4.762 mm) and over in thickness in all widths shall be as agreed upon by purchaser and vendor. 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” is the distance betwe
44、en 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 October 1, 2015. 4. QUALITY ASSURANCE PROV
45、ISIONS 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 deemed necessary to ensure that the product
46、 conforms to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), condition (3.3), room-temperature tensile properties (3.5.1.1), bending (3.5.2), microstructure (3.5.3), surface contamination (3.5.4), and tolerances (3.7) are acceptance tests and shall be pe
47、rformed on each heat or lot as applicable. 4.2.1.1 Ultrasonic inspection (3.6.1) of each plate when required. 4.2.2 Periodic Tests 900 F (482 C) tensile properties (3.5.1.2) is a periodic test and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by pu
48、rchaser. 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. SAE INTERNATIONAL AMS4919H Page 7 of 8 4.3.1 For Acceptance Tests 4.3.1.1 Composition One sample from each heat,
49、 except that for hydrogen determinations one sample from each lot obtained after thermal and chemical processing is completed. 4.3.1.2 Tensile Property, Bending, Microstructure, and Surface Contamination Requirements At least one sample from each lot. 4.3.1.2.1 Specimens for tensile tests of widths 9 inches (229 mm) and over shall be taken with the axis of the specimen perpendicular to the d
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