1、AEROSPACE MATERIAL SPECIFICATIONAMS7902 REV. GIssued 1961-07Revised 2015-01Superseding AMS7902FBeryllium Sheet and Plate98Be(Composition similar to UNS R19801)RATIONALEAMS7902G is a Five Year Review and update of this specification.1. SCOPE1.1 Form This specification covers beryllium in the form of
2、sheet and plate produced by hot rolling beryllium.1.1.1 SheetThickness 0.020 to 0.250 inch (0.51 to 6.35 mm), inclusive.1.1.2 PlateThickness over 0.250 inch (6.35 mm).1.2 Application These products have been used typically for parts requiring high strength-to-weight ratio and high modulus of elastic
3、ity, but usage is not limited to such applications.1.3 Classification There are three sheet and plate classifications based on flatness tolerances (See 3.5.5).1.4 Safety - Hazardous Materials While the materials, methods, applications, and processes described or referenced in this specification may
4、involve the use of hazardous materials, this specification does not address the hazards that may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the
5、 health and safety of all personnel involved.1.4.1 WARNINGInhaling dust or fumes containing beryllium may cause chronic beryllium disease, a serious chronic lung disease, in some individuals. Over time, lung disease can be fatal. Read the product specific Safety Data Sheet (SDS) for additional envir
6、onmental, health and safety information before working with beryllium or beryllium-containing materials. _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 i
7、ts applicability and suitability for any particular use, including any patent infringement arising therefrom, 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 wr
8、itten comments and suggestions.Copyright 2015 SAE InternationalAll rights reserved. No part of this 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 permis
9、sion of SAE.TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada)Tel: +1 724-776-4970 (outside USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technica
10、l/standards/AMS7902GSAE INTERNATIONAL AMS7902G Page 2 of 92. APPLICABLE DOCUMENTSThe 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 s
11、pecific 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: 87
12、7-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.AMS2806 Identification, Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and AlloysAMS-STD-2154 Inspection, Ultrasonic, Wrought Metals2.2 ASTM Publications Avai
13、lable from ASTM International, 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 MaterialsASTM E1417 Liquid Penetrant TestingASTM E1742 Radiographic Examination2.3 ASME Publications Available from ASME, P
14、.O. Box 2900, 22 Law Drive, Fairfield, NJ 07007-2900, Tel: 800-843-2763 (U.S./Canada), 001-800-843-2763 (Mexico), 973-882-1170 (outside North America), www.asme.org.ASME B46.1 Surface Texture, Surface Roughness, Waviness and LayASME Y14.5M Dimensioning and Tolerancing3. TECHNICAL REQUIREMENTS 3.1 Co
15、mposition Shall conform to the percentages by weight shown in Table 1; beryllium oxide shall be determined by gas fusion; aluminum, iron, magnesium, and silicon and other elements by spectrochemical methods; and carbon by combustion. Beryllium shall be determined by difference. In case of disputes b
16、etween analyses by different spectrochemical methods, emission spectroscopy shall govern.SAE INTERNATIONAL AMS7902G Page 3 of 9Table 1 - CompositionElement min maxBeryllium Oxide - 2.0Aluminum - 0.16Carbon - 0.15Iron - 0.18Magnesium - 0.08Silicon - 0.08Other elements, each (3.1.1) - 0.04Beryllium 98
17、.0 -3.1.1 Determination is not required for routine acceptance.3.2 ConditionHot rolled from a block of consolidated beryllium powder and stress relieved.3.2.1 The product shall be furnished with a machined surface. The standard surface finish shall be no greater than 55 Ra (63 microinches (1.6 m) fo
18、r sheet and 110 Ra (125 microinches (3.2 m) for plate up to 0.600 inch (15.24 mm) in thickness, determined in accordance with ASME B46.1.3.3 PropertiesThe product shall conform to the following requirements:3.3.1 Tensile PropertiesShall be determined in the longitudinal and tranverse directions at r
19、oom temperature as shown in Table 2 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 and may be increased thereafter to 0.0
20、5 inch/inch/minute (0.05 mm/mm/minute).Table 2A - Minimum tensile properties, inch/pound unitsNormal ThicknessInchTensileStrengthksiYield Strengthat 0.2% OffsetksiElongationin 1 Inch%0.020 to 0.250, incl 70 50.0 10Over 0.250 to 0.450, incl 65 45.0 4Over 0.450 to 0.600, incl 60 40.0 3Over 0.600 40.0
21、30.0 1SAE INTERNATIONAL AMS7902G Page 4 of 9Table 2B - Minimum tensile properties, SI unitsNormal ThicknessMillimetersTensileStrengthMPaYield Strengthat 0.2% OffsetMPaElongationin 25.4 mm%0.51 to 6.35, incl 483 345 10Over 6.35 to 11.43, incl 448 310 4Over 11.43 to 15.24, incl 414 276 3Over 15.24 276
22、 207 13.3.1.1 Transverse requirements in Table 2 apply only to product that a tensile specimen not less than 2.50 inches (63.5 mm) in length can be obtained.3.4 QualityThe product, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from im
23、perfections detrimental to usage of the product.3.4.1 The product shall be free from cracks and internal defects, determined as in 3.4.1.1, 3.4.1.2, 3.4.1.3, and 3.4.1.4.3.4.1.1 VisualNo restrictions to size or number of visual imperfections if they do not hold fluorescent penetrant dye.3.4.1.2 Fluo
24、rescent Penetrant InspectionShall be performed in accordance with ASTM E1417, Type 1, Level 2. The maximum allowable size and number of indications per side in a 12-inch (305-mm) square area shall be as shown in Table 3:Table 3A - Fluorescent penetrant inspection requirements, inch/pound unitsIndica
25、tion SizeInchMaximum AcceptableNumber of IndicationsUp to 0.003, incl Not counted unless in a cluster wherevisible with no magnificationOver 0.003 to 0.005, incl 5 - no more than two in a 2-inchdiameter circle.Over 0.005 to 0.010, incl 3 - at least 2 inches apart.Over 0.010 0Table 3B - Fluorescent p
26、enetrant inspection requirements, SI unitsIndication SizeMillimetersMaximum AcceptableNumber of IndicationsUp to 0.08, incl Not counted unless in a cluster wherevisible with no magnificationOver 0.08 to 0.13, incl 5 - no more than two in a 51-mmdiameter circle.Over 0.13 to 0.25, incl 3 - at least 51
27、 mm apart.Over 0.25 03.4.1.3 Ultrasonic InspectionWhen specified, product shall be subjected to ultrasonic inspection in accordance with AMS-STD-2154, except that a beryllium reference block may be used, and shall meet Class AA requirements of AMS-STD-2154.3.4.1.3.1 If a material other than berylliu
28、m is used as the reference block, the difference in attenuation, noise level, and velocity shall be taken into account.SAE INTERNATIONAL AMS7902G Page 5 of 93.4.1.3.2 For testing conducted on material with thickness less than 0.250 inch (6.35 mm), the method of testing shall be as agreed upon betwee
29、n the producer and the purchaser.3.4.1.4 Radiographic InspectionWhen specified, product shall be subjected to radiographic inspection in accordance with ASTM E1742, to a penetrameter sensitivity of 2% except as specified by 3.4.1.4.1, and shall meet the acceptance criteria of 3.4.1.4.2, 3.4.1.4.3, a
30、nd 3.4.1.4.4. The decision to accept or reject may be made directly beneath the IQI/Shim combination.3.4.1.4.1 Exceptions are taken to the penetrameter contrast requirement and applicable area of penetrameter density ranges of +30% or -15% from the density at penetrameter location(s).3.4.1.4.2 The t
31、otal combined volume per cubic inch (16.4 cm3) of all detectable radiographic indications shall not exceed the volume of a 0.050 inch (1.27 mm) diameter sphere (e.g., total spherical volume shall not exceed 0.000065 cubic inches 1.07 mm3). For calculation purposes, assume all indications are spheric
32、al. 3.4.1.4.3 Part Density UniformityThe terms variable density areas, banding, or striations denote relatively large areas of a radiograph, which vary in densityas compared to the surrounding area. These areas shall not vary in radiographic density by more than 5% as compared to the surrounding are
33、a of comparable section thickness. Suspect areas shall be re-radiographed and interpreted with the appropriate penetrameter, or with beryllium of 5% in thickness, placed as follows:3.4.1.4.3.1 Less dense (darker radiograph) areas shall be covered by the penetrameter. The radiograph of the covered ar
34、ea shall appear lighter than that of the adjacent area.3.4.1.4.3.2 More dense (lighter radiograph) areas shall have the penetrameter placed immediately adjacent to them. The radiograph of the covered area shall appear lighter than that of the suspect more-dense area.3.4.1.4.4 Discrete high density (
35、light radiograph) indications, or areas in product 1.000 inch (25.40 mm) and under in nominal thickness, shall not exceed 5% in radiographic density variation compared to the surrounding material. (Note: The minimum detectable size of voids and inclusions will increase as the section thickness incre
36、ases.)3.5 TolerancesShall conform to the dimensions and dimensional tolerances established by the purchase order and applicable drawings. If tolerances are not so specified, standard tolerances in accordance with ASME Y14.5M, as shown in Table 4, shall apply.3.5.1 ThicknessSAE INTERNATIONAL AMS7902G
37、 Page 6 of 9Table 4A - Thickness tolerances, inch/pound unitsThicknessInchToleranceInchplusToleranceInchminus0.020 to 0.025, incl 0.003 0.003Over 0.025 to 0.034, incl 0.004 0.004Over 0.034 to 0.056, incl 0.005 0.005Over 0.056 to 0.070, incl 0.006 0.006Over 0.070 to 0.078, incl 0.007 0.007Over 0.078
38、to 0.093, incl 0.008 0.008Over 0.093 to 0.109, incl 0.009 0.009Over 0.109 to 0.125, incl 0.010 0.010Over 0.125 to 0.140, incl 0.012 0.010Over 0.140 to 0.171, incl 0.014 0.010Over 0.171 to 0.250, incl 0.015 0.010Over 0.250 to 0.351, incl 0.015 0.010Over 0.351 to 0.451, incl 0.020 0.010Over 0.451 to 0
39、.600, incl 0.025 0.015Table 4B - Thickness tolerances, SI unitsThicknessMillimetersToleranceMillimeterplusToleranceMillimeterminus0.51 to 0.64, incl 0.08 0.08Over 0.64 to 0.86, incl 0.10 0.10Over 0.86 to 1.42, incl 0.13 0.13Over 1.42 to 1.78, incl 0.15 0.15Over 1.78 to 1.98, incl 0.18 0.18Over 1.98
40、to 2.36, incl 0.20 0.20Over 2.36 to 2.77, incl 0.23 0.23Over 2.77 to 3.18, incl 0.25 0.25Over 3.18 to 3.56, incl 0.30 0.25Over 3.56 to 4.34, incl 0.36 0.25Over 4.34 to 6.35, incl 0.38 0.25Over 6.35 to 8.92, incl 0.38 0.25Over 8.92 to 11.46, incl 0.51 0.25Over 11.46 to 15.24, incl 0.64 0.383.5.1.1 Th
41、ickness measurements on sheet and plate, 1.0 inch (25 mm) or more in width, shall not be conducted closer to any edge than 0.375 inch (9.52 mm). There shall be no restriction of thickness measurement location for sheet or plate under 1.0 inch (25 mm) wide. Thickness measurements shall be taken at a
42、maximum of 6 inches (152 mm) apart over the entire surface of the sheet or plate.3.5.2 Width3.5.2.1 SheetShall not vary more than plus 0.125 inch (3.18 mm), minus 0 inch (0 mm).3.5.2.2 PlateShall not vary more than plus 0.125 inch (3.18 mm), minus 0.125 inch (3.18 mm).SAE INTERNATIONAL AMS7902G Page
43、 7 of 93.5.3 Length3.5.3.1 SheetShall not vary more than plus 0.250 inch (6.35 mm), minus 0 inch (0 mm).3.5.3.2 PlateShall not vary more than plus 0.125 inch (6.35 mm), minus 0.125 inch (6.35 mm).3.5.4 StraightnessMaximum edgewise curvature (depth of arc) shall not exceed 1/16 inch/foot (5.2 mm/m) o
44、f length, measured in the planeof the sheet or plate.3.5.5 FlatnessShall not vary more than shown in Table 5, determined by methods agreed upon by the purchaser and producer.Table 5A - Flatness tolerances, inch/pound unitsThickness, InchesClass1Class2Class3Up to 0.040, incl 2% 1% 0.030 inch per foot
45、Over 0.040 to 0.250, incl 1% 1/2% 0.030 inch per footOver 0.250 1/2% 1/2% N/ATable 5B - Flatness tolerances, SI unitsThickness, MillimetersClass1Class2Class3Up to 1.02, incl 2% 1% 2.5 mm/mOver 1.02 to 6.35, incl 1% 1/2% 2.5 mm/mOver 6.35 1/2% 1/2% N/A4. QUALITY ASSURANCE PROVISIONS4.1 Responsibility
46、 for InspectionThe producer of the product shall supply 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 confirmatory testing deemed necessary to ensure that the product conforms to specified req
47、uirements.4.2 Classification of TestsAll technical requirements are acceptance tests and shall be performed on each lot as applicable.4.3 Sampling and TestingShall be in accordance with the following; a lot shall be all product manufactured from a single billet processed at the sametime, in the same
48、 condition as defined in 3.2, and presented for producers inspection at one time.4.3.1 CompositionNot less than one sample from each lot.SAE INTERNATIONAL AMS7902G Page 8 of 94.3.2 Tensile PropertiesNot less than one longitudinal and one transverse specimen from each sheet or plate, taken from any l
49、ocation.4.3.3 Fluorescent Penetrant Inspection and TolerancesEach piece, unless a sampling plan has been agreed upon by purchaser and producer.4.3.4 Ultrasonic and Radiographic InspectionAs agreed upon by purchaser and producer.4.4 Reports The producer of the product shall furnish with each shipment a report showing the results of tests for composition and tensile properties of each sheet or plate, and
