ASTM B760-86(1999)
(Specification)Standard Specification for Tungsten Plate, Sheet, and Foil
Standard Specification for Tungsten Plate, Sheet, and Foil
SCOPE
1.1 This specification covers unalloyed tungsten plate, sheet, and foil.
1.2 The values stated in inch-pound units are to be regarded as the standard.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: B 760 – 86 (Reapproved 1999)
Standard Specification for
Tungsten Plate, Sheet, and Foil
This standard is issued under the fixed designation B760; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
TABLE 1 Chemical Composition/Check Analysis
1. Scope
Composition, Permissable Variations in
1.1 This specification covers unalloyed tungsten plate,
Element
max, % Check Analysis, %
sheet, and foil.
C 0.010 60.002
1.2 The values stated in inch-pound units are to be regarded
O 0.010 + 10 % relative
as the standard.
N 0.010 + 0.0005
Fe 0.010 + 0.001
Ni 0.010 + 0.001
2. Terminology
Si 0.010 + 0.001
2.1 Definitions of Terms Specific to This Standard:
2.1.1 foil—any product less than 0.005 in. (0.13 mm) in
thickness. 5. Chemical Composition
2.1.2 plate—any product ⁄16 in. (4.75 mm) or more in
5.1 The tungsten ingots or billets for conversion to finished
thickness.
products covered by this specification shall conform to the
2.1.3 sheet—any product 0.187 in. (4.75 mm) or less in
requirements of the chemical composition prescribed in Table
thickness, to a minimum of 0.005 in. (0.13 mm) in thickness.
1.
5.2 Check Analysis:
3. Ordering Information
5.2.1 Checkanalysisisananalysismadebythepurchaseror
3.1 Ordersformaterialunderthisspecificationshallinclude
the manufacturer of the metal after it has been processed into
the following information:
finished mill forms, and is either for the purpose of verifying
3.1.1 Material identification and temper designation,
the composition of a heat or lot, or to determine variations in
3.1.2 Product form (Section 2),
the composition within a heat or lot.
3.1.3 Chemical requirements (Table 1),
5.2.2 Checkanalysistolerancesdonotbroadenthespecified
3.1.4 Tolerances (Section 6, Table 2, and Fig. 1),
heat analysis requirements but cover variations between labo-
3.1.5 Workmanship and quality level requirements (Section
ratories in the measurement of chemical content.
7),
5.2.3 The manufacturer shall not ship material that is
3.1.6 Packaging (Section 13),
outside the limits specified in Table 1, with the exception of
3.1.7 Marking (Section 12),
oxygen and nitrogen, whose percentage may vary with the
3.1.8 Certification and reports (Section 11), and
method of manufacture.
3.1.9 Disposition of rejected material (Section 10).
5.2.4 Check analysis limits shall be as specified in Table 1.
4. Materials and Manufacture
6. Permissible Variations in Dimensions
4.1 The various tungsten flat products covered by this
6.1 The thickness tolerances on tungsten products covered
specification shall be produced using common rolling, forging,
by this specification shall be as specified in Table 2.
or extrusion equipment, as normally found in primary mill
6.2 The width tolerances shall be as agreed upon between
product plants. The ingot metal is consolidated employing
the manufacturer and the purchaser. In general, shearing
either the powder metallurgy or vacuum-arc-casting process.
tolerancewillbe6 ⁄16in.(61.6mm)andslittingtolerancewill
be6 ⁄32 in. (60.8 mm).
6.3 The length and camber tolerances shall be as agreed
This specification is under the jurisdiction of ASTM Committee B-10 on
upon between the manufacturer and the purchaser. In general,
Reactive and Refractory Metals and Alloysand is the direct responsibility of
length and camber tolerances will show a maximum deviation
Subcommittee B10.04on Molybdenum and Tungsten.
Current edition approved Feb. 28, 1986. Published April 1986. of+ ⁄16 in.,−0/ft (1.6 mm/m) of length.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 760
TABLE 2 Permissible Thickness Variations
A
Specified Width, Specified Thickness, Thickness Tolerance,
in. (mm) in. (mm) in. (mm)
12 (305) and under 0.005–0.010 (0.13–0.25), incl 60.001 (60.0254)
over 0.010–0.020 (0.25–0.51), incl 60.002 (60.0508)
over 0.020 (0.51) 610 %
Over 12–24 (305–610), over 0.010–0.025 (0.25–0.64), incl 60.0025 (60.0635)
incl over 0.025 (0.64) 610 %
A
Tolerances for foil shall be as agreed upon between the producer and the purchaser.
Flatness Deviation, % 5 (H/L) x 100
H 5 maximum distance between flat surface and lower surface of sheet.
L 5 minimum distance between highest point on sheet an
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