1、Designation: B 760 86 (Reapproved 1999)Standard 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.
2、A number in parentheses 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 unalloyed tungsten plate,sheet, and foil.1.2 The values stated in inch-pound units are to be regardedas th
3、e standard.2. Terminology2.1 Definitions of Terms Specific to This Standard:2.1.1 foilany product less than 0.005 in. (0.13 mm) inthickness.2.1.2 plateany product316 in. (4.75 mm) or more inthickness.2.1.3 sheetany product 0.187 in. (4.75 mm) or less inthickness, to a minimum of 0.005 in. (0.13 mm)
4、in thickness.3. Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Material identification and temper designation,3.1.2 Product form (Section 2),3.1.3 Chemical requirements (Table 1),3.1.4 Tolerances (Section 6, Table 2, and Fig. 1),3.1.
5、5 Workmanship and quality level requirements (Section7),3.1.6 Packaging (Section 13),3.1.7 Marking (Section 12),3.1.8 Certification and reports (Section 11), and3.1.9 Disposition of rejected material (Section 10).4. Materials and Manufacture4.1 The various tungsten flat products covered by thisspeci
6、fication shall be produced using common rolling, forging,or extrusion equipment, as normally found in primary millproduct plants. The ingot metal is consolidated employingeither the powder metallurgy or vacuum-arc-casting process.5. Chemical Composition5.1 The tungsten ingots or billets for conversi
7、on to finishedproducts covered by this specification shall conform to therequirements of the chemical composition prescribed in Table1.5.2 Check Analysis:5.2.1 Check analysis is an analysis made by the purchaser orthe manufacturer of the metal after it has been processed intofinished mill forms, and
8、 is either for the purpose of verifyingthe composition of a heat or lot, or to determine variations inthe composition within a heat or lot.5.2.2 Check analysis tolerances do not broaden the specifiedheat analysis requirements but cover variations between labo-ratories in the measurement of chemical
9、content.5.2.3 The manufacturer shall not ship material that isoutside the limits specified in Table 1, with the exception ofoxygen and nitrogen, whose percentage may vary with themethod of manufacture.5.2.4 Check analysis limits shall be as specified in Table 1.6. Permissible Variations in Dimension
10、s6.1 The thickness tolerances on tungsten products coveredby this specification shall be as specified in Table 2.6.2 The width tolerances shall be as agreed upon betweenthe manufacturer and the purchaser. In general, shearingtolerance will be6116 in. (61.6 mm) and slitting tolerance willbe6132 in. (
11、60.8 mm).6.3 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.6.4 Flatness tolerances on tungsten flat products shall be asfollows:Thickness,
12、 in.(mm)Flatness Deviation,max,%0.0050.187 (0.134.75) 43/165/8 (4.7515.9) 56.4.1 Determine flatness deviation (Fig. 1) as follows:Flatness deviation, % 5 H/L! 3 1001This specification is under the jurisdiction of ASTM Committee B-10 onReactive and Refractory Metals and Alloysand is the direct respon
13、sibility ofSubcommittee B10.04on Molybdenum and Tungsten.Current edition approved Feb. 28, 1986. Published April 1986.TABLE 1 Chemical Composition/Check AnalysisElementComposition,max, %Permissable Variations inCheck Analysis, %C 0.010 60.002O 0.010 + 10 % relativeN 0.010 + 0.0005Fe 0.010 + 0.001Ni
14、0.010 + 0.001Si 0.010 + 0.0011Copyright ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.where:H 5 maximum vertical distance between a flat referencesurface and the lower surface of the flat product, andL 5 minimum horizontal distance between the highestpoint of the flat
15、product where H is determined, and thepoint of contact of the lower surface of the flat productwith a flat reference surface.7. Workmanship, Finish, and Appearance7.1 Tungsten plate, sheet, and foil shall be free of injuriousexternal and internal imperfections of a nature that willinterfere with the
16、 purpose for which it is intended.7.2 Material may be supplied with as-rolled, as-cleaned,as-machined, or as-ground finish.7.3 The manufacturer shall be permitted to remove surfaceimperfections provided such removal does not reduce thedimensions below the minimum permitted by the tolerances forthat
17、dimension.8. Sampling8.1 Care shall be exercised to ensure that the sampleselected for testing is representative of the material and formand is not contaminated by the sampling procedure.9. Methods of Chemical Analysis9.1 The chemical composition enumerated in this specifica-tion shall in case of di
18、sagreement, be determined in accordancewith the methods approved for referee purposes by ASTM.Where such methods are not available, methods of analysis asmutually agreed upon by the manufacturer and the purchasershall be employed.10. Rejection10.1 Material not conforming to this specification or toa
19、uthorized modifications shall be subject to rejection. Unlessotherwise specified, rejected material may be returned to themanufacturer at the manufacturers expense unless the pur-chaser receives, within 4 weeks of notice of rejection, otherinstructions for disposition.11. Certification11.1 If reques
20、ted, the manufacturer shall supply at leastthree copies of a report of the chemical analysis of each heat orpowder metallurgy product from the powder lot represented inthe shipment, and reports of the result of tests of each size ofeach heat or powder lot to determine properties.11.2 The report shal
21、l include the purchase order number,heat or powder lot number, this specification number, type andtemper condition, nominal thickness, and quantity and numberof items covered by the shipment.12. Product Marking12.1 Unless otherwise specified, each plate or sheet shall belegibly and conspicuously mar
22、ked or tagged with the numberTABLE 2 Permissible Thickness VariationsSpecified Width,in. (mm)Specified Thickness,in. (mm)Thickness Tolerance,Ain. (mm)12 (305) and under 0.0050.010 (0.130.25), incl 60.001 (60.0254)over 0.0100.020 (0.250.51), incl 60.002 (60.0508)over 0.020 (0.51) 610 %Over 1224 (3056
23、10), over 0.0100.025 (0.250.64), incl 60.0025 (60.0635)incl over 0.025 (0.64) 610 %ATolerances for foil shall be as agreed upon between the producer and the purchaser.Flatness Deviation, % 5 (H/L) x 100H 5 maximum distance between flat surface and lower surface of sheet.L 5 minimum distance between
24、highest point on sheet and point of contact with flat surface.FIG. 1 Plate and Sheet Flatness TolerancesB 7602of this specification, material type and temper condition, heator lot number, manufacturers identification, and the nominalthickness gage in inches. All markings must withstand ordinaryhandl
25、ing and shall be capable of removal with standardcleaning solvents.12.2 Coiled sheet and foil shall be similarly marked at theoutside end of each coil.13. Packaging and Package Marking13.1 Unless otherwise specified, material purchased underthis specification must be packaged by box or other suitabl
26、eprotective containers and shall be so marked as to indicate thenature of any special handling required.14. Keywords14.1 foil; plate; sheet; tungstenThe American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connectionwith any item menti
27、oned in this standard. Users of this standard are expressly advised that determination of the validity of any suchpatent rights, and the risk of infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee
28、and must be 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 Headquarters. Your comments will receive careful consideration at a meeting of the respon
29、sibletechnical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make yourviews known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website (www.astm.org).B 7603
