1、Designation: B 760 07Standard Specification forTungsten Plate, Sheet, and Foil1This standard is issued under the fixed designation B 760; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parent
2、heses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers wrought unalloyed tungstenplate, sheet, and foil.1.2 The values stated in inch-pound units are to be regardedas the standard
3、. The values given in parentheses are forinformation only.1.3 The following precautionary caveat pertains only to thetest method portions of this specification: This standard doesnot purport to address all of the safety concerns, if any,associated with its use. It is the responsibility of the user o
4、f thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards:2E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3. Terminology3.1 Lot
5、Definitions:3.1.1 ingot, nno definition required.3.1.2 A manufacturing lot shall consist of a material of thesame size, shape, condition, and finish produced from the ingotor powder blend by the same rolling reduction schedule and thesame heat treatment parameters. Unless otherwise agreedbetween man
6、ufacturer and purchaser, a lot shall be limited tothe product of an 8 h period for final continuous anneal, or toa single furnace load for final batch anneal.3.1.3 A chemical analysis lot shall consist of a singlepowder blend in the case of products manufactured frompressed and sintered powder metal
7、lurgy shapes, or a singleingot in the case of products manufactured from ingot.3.2 Product Forms:3.2.1 foil, na flat product less than 0.005 in. (0.13 mm) inthickness.3.2.2 plate, na flat product 0.188 in. (4.75 mm) or more inthickness.3.2.3 sheet, na flat product from .005 in. (0.13 mm) to0.187 in.
8、 (4.75 mm) in thickness.4. Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Material identification and metallurigical condition(Section 7),4.1.2 Product form (Section 3),4.1.3 Chemical requirements (Table 1),4.1.4 Tolerances (Section
9、9, Table 2, and Fig. 1),4.1.5 Workmanship and quality level requirements (Section10),4.1.6 Packaging (Section 14),4.1.7 Marking (Section 14),4.1.8 Certification and reports (Section 13), and4.1.9 Disposition of rejected material (Section 12).5. Materials and Manufacture5.1 The various tungsten flat
10、products covered by thisspecification shall be formed with the conventional rolling,forging, or extrusion equipment, normally found in primaryferrous and nonferrous plants.5.2 The ingot metal is consolidated employing either thepowder metallurgy or vacuum-arc-casting process.6. Chemical Composition6
11、.1 The tungsten ingots or billets for conversion to finishedproducts covered by this specification shall conform to therequirements of the chemical composition prescribed in Table1.6.2 Heat Analysis:6.2.1 Heat analysis is an analysis made by the manufacturerof the metal on a representative sample of
12、 powder from a singlepowder blend in the case of material made from pressed andsintered powder billets, or on a representative sample of a castingot or intermediate product from that ingot in the case ofmaterial made from cast ingot.6.2.2 Chemical lot analysis shall be as specified in Table 1,with t
13、he exception of oxygen which shall be reported forinformation only, and not be required to meet the requirementsof Table 1.6.3 Check Analysis:1This specification is under the jurisdiction of ASTM Committee B10 onReactive and Refractory Metals and Alloys and is the direct responsibility ofSubcommitte
14、e B10.04 on Molybdenum and Tungsten.Current edition approved Dec. 1, 2007. Published December 2007. Originallyapproved in 1986. Last previous edition approved in 1999 as B 760 - 86 (1999).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at service
15、astm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Copyright by ASTM Intl (all rights reserved); Tue Nov 11 0
16、1:56:01 EST 2008Downloaded/printed byGuo Dehua (CNIS) pursuant to License Agreement. No further reproductions authorized.6.3.1 Check analysis is an analysis made by the purchaser orthe manufacturer of the metal after it has been processed intofinished mill forms, and is either for the purpose of ver
17、ifyingthe composition of a heat or lot, or to determine variations inthe composition within a heat or lot.6.3.2 Check analysis tolerances do not broaden the specifiedheat analysis requirements but cover variations between labo-ratories in the measurement of chemical content.6.3.3 Check analysis limi
18、ts shall be as specified in Table 1.6.3.4 The manufacturer shall not ship material that isoutside the limits specified in Table 1.7. Metallurgical Condition7.1 Plate, sheet and foil shall be furnished in one of thefollowing conditions as designated on the purchase order:Form Metallurgical ConditionP
19、late hot-rolledhot-rolled, stress-relievedSheet hot-rolledhot-rolled, stress-relievedcold-rolledcold-rolled, stress-relievedFoil cold-rolledcold-rolled, stress-relieved7.2 Other conditions can be specified as agreed upon be-tween the purchaser and the manufacturer at the time ofpurchase.8. Significa
20、nce of Numerical Limits8.1 For the purpose of determining compliance with thespecified limits for requirements of the properties listed in thefollowing table, an observed value or a calculated value shallbe rounded as indicated in accordance with the roundingmethods of Practice E29.Property Rounded
21、Unit for Observedor Calculated ValueChemical composition, and tolerances(when expressed as decimals)nearest unit in the last right-hand placeof figures of the specified limitTensile strength and yield strength nearest 1000 psi (10 MPa)Elongation nearest 1 %9. Permissible Variations in Dimensions9.1
22、The thickness tolerances on tungsten products coveredby this specification shall be as specified in Table 2.9.2 The width tolerances shall be as agreed upon betweenthe manufacturer and the purchaser. In general, shearingtolerance will be 6116 in. (61.6 mm) and slitting tolerance willbe 6132 in. (60.
23、8 mm).9.3 The length and camber tolerances shall be as agreedupon between the manufacturer and the purchaser. In general,length and camber tolerances will show a maximum deviationof +116 in., 0/ft (1.6 mm/m) of length.9.4 Flatness tolerances on tungsten flat products shall be asfollows:Thickness, in
24、.(mm)Flatness Deviation,max,%0.0050.187 (0.134.75) 40.1880.625 (4.7515.9) 59.4.1 Determine flatness deviation (Fig. 1) as follows:Flatness deviation, % 5 H/L! 3 100where:H = maximum vertical distance between a flat referencesurface and the lower surface of the flat product, andL = minimum horizontal
25、 distance between the highestpoint of the flat product where H is determined, and thepoint of contact of the lower surface of the flat productwith a flat reference surface.10. Workmanship, Finish, and Appearance10.1 Cracks, seams, slivers, blisters, burrs, and other inju-rious imperfections shall no
26、t exceed standards of acceptabilityagreed upon by the manufacturer and the purchaser.10.2 Tungsten plate, sheet, and foil shall be free of injuriousinternal and external imperfections of a nature that willinterfere with the purpose for which it was intended.10.3 Methods of testing for these defects
27、and standards ofacceptability shall be as agreed upon between the manufacturerand the purchaser.10.4 Material may be supplied with as-rolled, as-cleaned,as-machined, or as-ground finish.10.5 The manufacturer shall be permitted to remove surfaceimperfections provided such removal does not reduce thed
28、imensions below the minimum permitted by the tolerances forthat dimension.11. Sampling and Test Methods11.1 Care shall be exercised to ensure that the sampleselected for testing is representative of the material and formand that it is not contaminated by the sampling procedure. Ifthere is any questi
29、on relating to the sampling technique or theanalysis of the sample, the methods of sampling and analysisshall be as agreed upon between the purchaser and themanufacturer.11.2 Test Methods:11.2.1 Chemistry:11.2.1.1 Analyses shall be made using the manufacturersstandard methods.11.2.1.2 The chemical c
30、omposition enumerated in thisspecification shall in case of disagreement, be determined inaccordance with the methods approved for referee purposes byASTM International. Where such methods are not available,methods of analysis as mutually agreed upon by the manufac-turer and the purchaser shall be e
31、mployed.TABLE 1 Chemical Composition/Check AnalysisElementComposition,max, %Permissible Variations inCheck Analysis, %C 0.010 60.002OA0.010 + 10 % relativeN 0.010 + 0.0005Fe 0.010 + 0.001Ni 0.010 + 0.001Si 0.010 + 0.001AIf chemical analysis is performed on a sample from the powder blend used tomake
32、the finished product, oxygen will be reported for information only.B760072Copyright by ASTM Intl (all rights reserved); Tue Nov 11 01:56:01 EST 2008Downloaded/printed byGuo Dehua (CNIS) pursuant to License Agreement. No further reproductions authorized.12. Rejection and Referee12.1 Material that fai
33、ls to conform to the requirements ofthis specification or to authorized modifications may be re-jected. Rejection for failure of the material to meet therequirements of this specification shall be reported to themanufacturer within 30 calendar days from the receipt of thematerial by the purchaser.12
34、.2 Unless otherwise specified, rejected material may bereturned to the manufacturer at the manufacturers expense,unless the purchaser receives, within four weeks of the noticeof rejection, other instructions for disposition.12.3 In the event of disagreement between the manufacturerand the purchaser
35、on the conformance of the material to therequirements of the specification or any special test specifiedby the purchaser, a mutually acceptable referee shall performthe tests in question. The results of the referees testing shall beused in determining conformance of the material to thisspecification
36、.13. Certification13.1 If requested, the manufacturer shall supply at leastthree copies of a report of the heat analysis of each melt orpowder lot represented in the shipment, and reports of theresult of tests of each size of each heat or powder lot todetermine properties.13.2 The report shall inclu
37、de the purchase order number,heat or powder lot number, this specification number, type andmetallurgical condition, nominal thickness, and quantity andnumber of items covered by the shipment.14. Packaging and Package Marking14.1 IdentificationUnless otherwise specified, each plateor sheet shall be l
38、egibly and conspicuously marked or taggedwith the number of this specification, material type andmetallurgical condition, heat or lot number, manufacturersidentification, and the nominal thickness gage in inches. Allmarkings must withstand ordinary handling and shall becapable of removal with standa
39、rd cleaning solvents. Themarking shall have no deleterious effect on the material or itsperformance.14.1.1 Coiled sheet and foil shall be similarly marked at theoutside end of each coil.14.2 All material shall be packaged in such a manner as toassure safe delivery to its destination when properly tr
40、ans-ported by any common carrier.14.3 The package shall be so marked as to indicate thenature of any special handling required.14.4 Each bundle, box, or coil shall be legibly and conspicu-ously marked or tagged with the following information:14.4.1 Purchase order or contract number,14.4.2 Name of ma
41、terial,14.4.3 Grade,14.4.4 Size,14.4.5 Lot, heat, or ingot number,TABLE 2 Permissible Thickness VariationsSpecified Width,in. (mm)Specified Thickness,in. (mm)Thickness Tolerance,Ain. (mm)12 (305) and under 0.005 to 0.010 (0.130.25) 60.001 (60.0254)over 0.010 to 0.020 (0.250.51) 60.002 (60.051)over 0
42、.020 (0.51) 610 %Over 12 to 24 (305610), over 0.010 to 0.025 (0.250.64) 60.0025 (60.064)over 0.025 (0.64) 610 %ATolerances for foil shall be as agreed upon between the producer and the purchaser.Flatness Deviation, % = (H/L) x 100H = maximum distance between flat surface and lower surface of sheet.L
43、 = minimum distance between highest point on sheet and point of contact with flat surface.FIG. 1 Plate and Sheet Flatness TolerancesB760073Copyright by ASTM Intl (all rights reserved); Tue Nov 11 01:56:01 EST 2008Downloaded/printed byGuo Dehua (CNIS) pursuant to License Agreement. No further reprodu
44、ctions authorized.14.4.6 Metallurgical condition,14.4.7 Gross, net and tare weights, and14.4.8 ASTM specification number.15. Keywords15.1 foil; plate; sheet; tungstenASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin thi
45、s standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be
46、 reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresp
47、onsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, We
48、st Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).B760074Copyright by ASTM Intl (all rights reserved); Tue Nov 11 01:56:01 EST 2008Downloaded/printed byGuo Dehua (CNIS) pursuant to License Agreement. No further reproductions authorized.
