1、_ 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSRU t 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 therefrom, is
2、the sole rHVSRQVLELOLWRIWKHXVHU 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 2016 SAE International All rights reserved. No part of this publication may
3、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: +1 724-776-4970 (outside USA)
4、 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/AMS4973H AEROSPACE MATERIAL SPECIFICATION AMS4973 REV. H Issued 1966-05 Revised 2016-08 Supersed
5、ing AMS4973G Titanium Alloy Forgings 8Al - 1Mo - 1V Solution Heat Treated and Stabilized (Composition similar to UNS R54810) RATIONALE AMS4973H results from a Five Year Review and update of this specification. that includes the removal of larger sample size allowance for hydrogen (covered by ASTM E1
6、447), requires agreement on mechanical property values for material outside specification ranges (3.5.1.1.4), the addition of AS6279 (3.7) and revises reporting (4.4). 1. SCOPE 1.1 Form This specification covers a titanium alloy in the form of forgings up to 4.000 inches (101.60 mm) inclusive and fo
7、rging stock. 1.2 Application This alloy has been used typically for parts requiring strength up to 800 F (427 C), but usage is not limited to such applications. 1.2.1 Certain processing procedures and service conditions may cause these forgings to become subject to stress-corrosion cracking. ARP982
8、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 specified herein. The supplier may work to a subsequent revision of a document unless a specific
9、 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 Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-
10、7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2249 Chemical Check Analysis Limits Titanium and Titanium Alloys AMS2808 Identification Forgings SAE INTERNATIONAL AMS4973H Page 2 of 7 AMS2750 Pyrometry ARP982 Minimizing Stress-Corrosion Cracking in Wrought Titanium All
11、oy Products ARP1917 Clarification of Terms Used in Aerospace Metals Specifications AS1814 Terminology for Titanium Microstructures 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
12、. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM E8/E8M Tension Testing of Metallic Materials ASTM E21 Elevated Temperature Tension Tests of Metallic Materials ASTM E1409 Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by Inert Gas Fusion ASTM
13、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 Refractory and Reactive Metals and Their Alloys by Combustion Analysis ASTM E2371 Analysis of Titanium and Titanium Alloys Dire
14、ct Current Plasma and Inductively Coupled Plasma by 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 nitroge
15、n in accordance with ASTM E1409, and other elements in accordance with ASTM E2371. 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 Carbon - 0.08 Nitrogen -
16、0.05 (500 ppm) Hydrogen - 0.0150 (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 SAE INTERNATIONAL AMS4973H Page 3 of 7 3.1.1 Determination not required for routine acceptance. 3.1.2 Check Analysis Composition va
17、riations shall meet the applicable requirements of AMS2249; no variation over maximum will be permitted for yttrium. 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 col
18、d hearth melting practice. The subsequent melt or melts shall be made under vacuum using vacuum arc remelting (VAR) practice. Alloy additions are not permitted in the final melt cycle. 3.2.1 The atmosphere for nonconsumable electrode melting shall be vacuum or shall be argon and/or helium at an abso
19、lute pressure not higher than 1000 mm of mercury. 3.2.2 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 Forgings Solution heat treated, stabilized, and descaled. 3.3.2 Forging Stock As o
20、rdered by the forging manufacturer. 3.4 Heat Treatment Forgings shall be heat treated as follows, furnace surveys and calibration of temperature controllers and recorders shall be in accordance with AMS2750: 3.4.1 Solution Heat Treatment Shall be as specified in 3.4.1.1 unless purchaser permits trea
21、tment as specified in 3.4.1.2. 3.4.1.1 Heat to a temperature within the range 1800 to 1850 F (982 to 1010 C), hold at the selected temperature within 25 F (14 C) for 60 minutes 5 minutes, and quench in oil or water. When permitted by purchaser, forgings may be air cooled. 3.4.1.2 Heat to a temperatu
22、re within the range 1650 to 1700 F (899 to 927 C), hold at the selected temperature within 25 F (14 C) for 60 minutes 5 minutes, and cool at a rate equivalent to an air cool or faster. 3.4.2 Stabilization Heat Treatment Heat to a temperature within the range 1050 to 1100 F (566 to 593 C), hold at th
23、e selected temperature within 15 F (8 C) for not less than 8 hours, and cool in air. SAE INTERNATIONAL AMS4973H Page 4 of 7 3.5 Properties The product shall conform to the following requirements: 3.5.1 Forgings 3.5.1.1 Tensile Properties Shall be as follows for cross-sections 4.000 inches (101.60 mm
24、) and under at time of heat treatment: 3.5.1.1.1 At Room Temperature 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)
25、 through the 0.2% offset yield strain. Table 2A - Minimum tensile properties, inch/pound units Nominal Cross-Section Thickness Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 4D % Reduction of Area % Up to 2.500, excl 130 120 10 20 2.500 to 4.000, incl 120 110 10 20 Table
26、 2B - Minimum tensile properties, SI units Nominal Cross-Section Thickness Millimeters Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 4D % Reduction of Area % Up to 63.50, excl 896 827 10 20 63.50 to 101.60, incl 827 758 10 20 3.5.1.1.2 At 800 F (427 C) Shall be as specified in
27、 Table 3, determined in accordance with ASTM E21 on specimens heated to 800 F 10 F (427 C 6 C), held at heat for 20 to 30 minutes before testing, and tested at 800 F 10 F (427 C 6 C). Table 3A - Minimum tensile properties at 800 F, inch/pound units Nominal Cross-Section Thickness Inches Tensile Stre
28、ngth ksi Yield Strength at 0.2% Offset ksi Elongation in 4D % Reduction of Area % Up to 2.500, excl 90 70 10 25 2.500 to 4.000, incl 80 60 10 25 Table 3B - Minimum tensile properties at 427 C, SI units Nominal Cross-Section Thickness Millimeters Tensile Strength MPa Yield Strength at 0.2% Offset MPa
29、 Elongation in 4D % Reduction of Area % Up to 63.50, excl 621 483 10 25 63.50 to 101.60, incl 552 414 10 25 SAE INTERNATIONAL AMS4973H Page 5 of 7 3.5.1.1.3 Tensile property requirements apply in both the longitudinal and transverse directions but tests in the transverse direction need be made only
30、on product that specimens not less than 2.500 inches (63.50 mm) in length can be taken. Testing in the longitudinal direction is not required on product tested in the transverse direction. 3.5.1.1.4 Mechanical property requirements for product outside the size range covered by 1.1 shall be agreed up
31、on between purchaser and producer. 3.5.1.2 Microstructure Shall be that structure resulting from processing within the alpha-beta phase field. Microstructure shall conform to 3.5.1.2.1 or 3.5.1.2.2. 3.5.1.2.1 Equiaxed and/or elongated primary alpha in a transformed beta matrix with no continuous net
32、work of alpha at prior beta grain boundaries. 3.5.1.2.2 Essentially complete field of equiaxed and/or elongated alpha with no continuous network of alpha at prior beta grain boundaries. 3.5.1.3 Surface Contamination Except as permitted by 3.5.1.3.1, forgings shall be free of any oxygen-rich layer, s
33、uch as alpha case (see 8.2), or other surface contamination, determined by microscopic examination at not lower than 400X magnification or other method acceptable to purchaser. 3.5.1.3.1 When permitted by purchaser, forgings to be machined all over may have an oxygen-rich layer provided such layer i
34、s removable within the machining allowance on the forging. 3.5.2 Forging Stock When a sample of stock is forged to a test coupon and heat treated as in 3.4, specimens taken from the heat treated coupon shall conform to the requirements of 3.5.1.1.1. If specimens taken from the stock after heat treat
35、ment as in 3.4 conform to the requirements of 3.5.1.1.1, the tests shall be accepted as equivalent to tests of a forged coupon. 3.6 Quality The product, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to u
36、sage of the product. 3.7 Production, distribution, and procurement of metal stock shall comply with AS6279. This requirement becomes effective January 1, 2018. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The producer of the product shall supply all samples for producers tests a
37、nd 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 The following requireme
38、nts are acceptance tests and shall be performed on each heat or lot, as applicable. 4.2.1.1 Composition (3.1) of each heat and hydrogen content of each lot. 4.2.1.2 Tensile properties at room temperature (3.5.1.1.1), microstructure (3.5.1.2), and surface contamination (3.5.1.3) of each lot of forgin
39、gs. SAE INTERNATIONAL AMS4973H Page 6 of 7 4.2.2 Periodic Tests Forgings for tensile properties at 800 F (427 C) (3.5.1.1.2) and of forging stock to demonstrate ability to develop required properties (3.5.2) are periodic tests and shall be performed at a frequency selected by the producer unless fre
40、quency of testing is specified by purchaser. 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, and solution and stabilization heat treated in the same heat treat batch: 4.3.1 For Ac
41、ceptance 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 The number, location, and orientation of samples from each lot of forgings shall be a
42、s agreed upon by purchaser and producer. 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 results of tests for composition of ea
43、ch heat and for the hydrogen content and room-temperature tensile properties of each lot, and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, heat and lot numbers, AMS4973H, product form and size and part number (if applicab
44、le), specific heat treatment used, quantity, and the size of stock used to make the forgings. 4.4.2 When the product size is outside the range covered by 1.1, the report shall contain a statement to that effect. 4.4.3 The producer of forging stock shall furnish with each shipment a report showing pr
45、oducer 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. This report shall include the purchase order number, heat number, AMS4973H, size, and quantity. 4.5 Resampling and
46、Retesting If any specimen used in the above tests fails to meet the specified requirements, 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 b
47、e cause for rejection of the product represented and no additional testing shall be permitted. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Identification 5.1.1 Forgings In accordance with AMS2808. 5.1.2 Forging Stock As agreed upon by purchaser and producer. SAE INTERNATI
48、ONAL AMS4973H Page 7 of 7 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 product to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A producer shall include this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Product not conforming to this specification, or to modifications authorized by purchaser, will be subject
