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 2015 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/AMS4972H AEROSPACE MATERIAL SPECIFICATION AMS4972 REV. H Issued 1966-03 Revised 2
5、015-07 Superseding AMS4972G Titanium Alloy Bars, Wire, and Rings 8Al - 1Mo - 1V Solution Heat Treated and Stabilized (Composition similar to UNS R54810) RATIONALE AMS4972H results from a Five Year Review and update of this specification that includes the removal of sample size allowance for hydrogen
6、 of Table 1 (covered by ASTM E1447), requires agreement on mechanical property values for material outside specification ranges (3.5.1.1.5 and 8.6), the addition of AS6279 (3.8) and revises the report paragraph (4.4). 1. SCOPE 1.1 Form This specification covers a titanium alloy in the form of bars,
7、wire, flash welded rings up through 4.000 inches (101.60 mm), inclusive in diameter or least distance between parallel sides, and stock for flash welded rings or heading of any size. 1.2 Application This alloy has been used typically for parts requiring strength up to 800 F (427 C), but usage is not
8、 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. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the da
9、te 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 has been cancelled and no superseding document has been specified, the
10、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 USA), www.sae.org. AMS2241 Tolerances, Corrosion and Heat-Resistant Steel
11、, Iron Alloy, Titanium, and Titanium Alloy Bars and Wire SAE INTERNATIONAL AMS4972H Page 2 of 8 AMS2249 Chemical Check Analysis Limits, Titanium and Titanium Alloys AMS2368 Sampling and Testing of Wrought Titanium Raw Material Except Forgings and Forging Stock AMS2750 Pyrometry AMS2809 Identificatio
12、n, Titanium and Titanium Alloy Wrought Products AMS7498 Rings, Flash Welded, Titanium and Titanium Alloys ARP982 Minimizing Stress-Corrosion Cracking in Wrought Titanium Alloy Products AS6279 Production, Distribution, and Procurement of Metal Stock 2.2 ASTM Publications Available from ASTM Internati
13、onal, 100 Barr Harbor Drive, P.O. 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
14、Alloys by the Inert Gas Fusion Technique 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 Refractory and Reactive Metals and Their Alloys by Combustion Analysis ASTM E2371
15、 Analysis of Titanium and Titanium Alloys by Direct Current Plasma and Inductively Coupled Plasma 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
16、accordance with ASTM E1447, oxygen and nitrogen 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
17、- 0.30 Oxygen - 0.12 Carbon - 0.08 Nitrogen - 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 AMS4972H Page 3 of 8 3.1.1 Determination not required for routine a
18、cceptance. 3.1.2 Check Analysis Composition variations shall meet 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 me
19、lting 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 inert gas at a pressure not higher than 1
20、000 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 Bars Hot finished with or without subsequent cold reduction, solution heat treated, stabilized, and descaled. Bar
21、 shall be processed to the final thickness/diameter by metallurgical working operations prior to any straightening, dimensional sizing or surface finishing operations. Bar shall not be cut from plate. 3.3.1.1 Round bars will be solution heat treated, stabilized, and ground or turned. 3.3.2 Wire Cold
22、 drawn, solution heat treated, stabilized, and descaled. 3.3.3 Flash Welded Rings Shall not be supplied unless specified or permitted on purchasers part drawing. When supplied, rings shall be manufactured in accordance with AMS7498. 3.3.4 Stock for Flash Welded Rings or Heading As ordered by the fla
23、sh welded ring or heading manufacturer. 3.4 Heat Treatment Bars, wire, and flash welded rings shall be heat treated as follows; Pyrometry shall be in accordance with AMS2750. 3.4.1 Solution Heat Treatment Heat to a temperature within the range 1650 to 1700 F (899 to 927 C) or within the range 1800 t
24、o 1850 F (982 to 1010 C), hold at the selected temperature within 25 F (14 C) for 60 minutes 5, 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 the selected temperature within 25
25、F (14 C) for not less than 8 hours, and cool at a rate equivalent to air cooling. SAE INTERNATIONAL AMS4972H Page 4 of 8 3.5 Properties The product shall conform to the following requirements: 3.5.1 Bars, Wire, and Flash Welded Rings Product 4.000 inches (101.60 mm) and under in nominal diameter or
26、least distance between parallel sides shall have the following properties: 3.5.1.1 Tensile Properties 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 wi
27、thin 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 Diameter or Least Distance Between Parallel Sides Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 4D % Red
28、uction of Area % Up to 2.500, excl 130 120 10 20 2.500 to 4.000, incl 120 110 10 20 Table 2B - Minimum tensile properties, SI units Nominal Diameter or Least Distance Between Parallel Sides Millimeters Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 4D % Reduction of Area % Up t
29、o 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 Table 3, determined in accordance with ASTM E21 on specimens heated to 800 F 10 (427 C 6), held at heat for 20 to 30 minutes before testing, and tested at 800 F 10 (427 C 6). Table 3A
30、- Minimum tensile properties, inch/pound units Nominal Diameter or Least Distance Between Parallel Sides Inches Tensile Strength 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 prop
31、erties, SI units Nominal Diameter or Least Distance Between Parallel Sides Millimeters Tensile Strength MPa Yield Strength at 0.2% Offset MPa 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 AMS4972H Page 5 of 8 3.5.1.1.3 Yi
32、eld strength and reduction of area requirements do not apply to wire under 0.125 inch (3.18 mm) in diameter or least distance between parallel sides. 3.5.1.1.4 Tensile property requirements apply in both the longitudinal and transverse directions, but tests in the transverse direction need be made o
33、nly on product from which specimens not less than 2.50 inches (63.5 mm) in length can be taken. Tests in the transverse direction are not required on product tested in the longitudinal direction. 3.5.1.1.5 Mechanical property requirements for product outside the size range covered by Table 2 shall b
34、e agreed upon between purchaser and producer. 3.5.1.2 Microstructure Shall be that structure resulting from alpha-beta processing. Microstructure shall conform to 3.5.1.2.1, 3.5.1.2.2, or 3.5.1.2.3. 3.5.1.2.1 Equiaxed alpha in a transformed beta matrix. 3.5.1.2.2 Equiaxed alpha and elongated alpha i
35、n a transformed beta matrix. 3.5.1.2.3 Partially broken and distorted grain boundary alpha with plate-like alpha. 3.5.1.2.4 A microstructure showing a continuous network of alpha in prior beta grain boundaries is not acceptable. 3.5.1.3 Surface Contamination Except as specified in 3.5.2.3.1 and 3.5.
36、2.3.2, the product shall be free of any oxygen-rich layer (See 8.2), such as alpha case, or other surface contamination, determined by microscopic examination at not lower than 400X magnification or by other method agreed upon by purchaser and producer. 3.5.1.3.1 An oxygen-rich layer not greater tha
37、n 0.001 inch (0.025 mm) in depth will be permitted on bars other than rounds. 3.5.1.3.2 When permitted by purchaser, flash welded rings to be machined all over may have an oxygen-rich layer (See 8.2) provided such layer is removable within the machining allowance for the part. 3.5.2 Stock for Flash
38、Welded Rings or Heading When a sample of stock is heat treated as in 3.4, specimens taken from the heat treated coupon shall conform to the requirements of 3.5.1.1. 3.6 Quality The product, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials an
39、d from imperfections detrimental to usage of the product. 3.7 Tolerances Bars and wire shall conform to all applicable requirements of AMS2241. 3.8 Production, distribution, and procurement of metal stock shall comply with AS6279. This requirement becomes effective September 1, 2016. SAE INTERNATION
40、AL AMS4972H 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 confirmator
41、y testing deemed necessary to ensure that the product conforms to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests The following are acceptance tests and shall be performed on each heat or lot as applicable: 4.2.1.1 Composition (3.1) 4.2.1.2 Hydrogen content of each lot. 4.
42、2.1.3 Microstructure (3.5.1.2) and surface contamination (3.5.1.3) of each lot of bars, wire and flash welded rings. 4.2.1.4 Tolerances (3.7) of bars and wire. 4.2.2 Periodic Tests The following are periodic tests and shall be performed at a frequency selected by the producer unless frequency of tes
43、ting is specified by purchaser: 4.2.2.1 Tensile properties at 800 F (427 C) (3.5.1.1.2) of bars, wire, and flash welded rings. 4.2.2.2 Ability of stock for flash welded rings or heading (3.5.2) to develop specified properties. 4.3 Sampling and Testing Shall be in accordance with AMS2368 and the foll
44、owing: 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 treatment batch: 4.3.1 For Acceptance Tests 4.3.1.1 Composition One sample from each heat, except that for hydrogen determinations one
45、 sample from each lot obtained after thermal and chemical processing is completed. 4.3.1.2 Tensile Properties At least one sample from bars, wire, and flash welded rings from each lot. 4.3.1.2.1 Specimens from flash welded rings shall be cut from parent metal not including the weld-heat-affected zon
46、e. SAE INTERNATIONAL AMS4972H Page 7 of 8 4.4 Reports 4.4.1 The producer shall furnish with each shipment a report showing producer identity, country where the metal was melted (e.g., final melt in the case of metal processed by multiple melting operations), the results of tests for composition of e
47、ach heat and for the hydrogen content and room-temperature tensile properties of each lot and state that the product conforms to the other technical requirements. This report shall include the purchase order number, heat and lot numbers, AMS4972H, specific heat treatment used, product form, mill pro
48、duced size (and/or part number, if applicable), and quantity. 4.4.2 Report the nominal metallurgically worked cross sectional size and the cut size, if different (See 3.3.1). 4.4.3 When the bar, wire and flash welded ring size is outside the range covered by Table 2, the report shall contain a state
49、ment to that effect. 4.5 Resampling and Retesting Shall be in accordance with AMS2368. 5. PREPARATION FOR DELIVERY 5.1 Identification 5.1.1 Bars and Wire In accordance with AMS2809. 5.1.2 Flash Welded Rings and Stock for Flash Welded Rings or Heading As agreed upon by purchaser and producer. 5.2 Packaging The product shall be prepared for shipment in accordance with commercial practice and in compl
