ASTM B760-07(2013)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:B760 −07 (Reapproved 2013)
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.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope pressed and sintered powder metallurgy shapes, or a single
ingot in the case of products manufactured from ingot.
1.1 This specification covers wrought unalloyed tungsten
3.2 Product Forms:
plate, sheet, and foil.
3.2.1 foil, n—a flat product less than 0.005 in. (0.13 mm) in
1.2 The values stated in inch-pound units are to be regarded
thickness.
as standard. The values given in parentheses are mathematical
3.2.2 plate, n—aflatproduct0.188in.(4.75mm)ormorein
conversions to SI units that are provided for information only
thickness.
and are not considered standard.
3.2.3 sheet, n—a flat product from .005 in. (0.13 mm) to
1.3 The following precautionary caveat pertains only to the
0.187 in. (4.75 mm) in thickness.
test method portions of this specification: This standard does
not purport to address all of the safety concerns, if any,
4. Ordering Information
associated with its use. It is the responsibility of the user of this
4.1 Ordersformaterialunderthisspecificationshallinclude
standard to establish appropriate safety and health practices
the following information:
and determine the applicability of regulatory limitations prior
4.1.1 Material identification and metallurigical condition
to use.
(Section 7),
4.1.2 Product form (Section 3),
2. Referenced Documents
2 4.1.3 Chemical requirements (Table 1),
2.1 ASTM Standards:
4.1.4 Tolerances (Section 9, Table 2, and Fig. 1),
E29Practice for Using Significant Digits in Test Data to
4.1.5 Workmanship and quality level requirements (Section
Determine Conformance with Specifications
10),
4.1.6 Packaging (Section 14),
3. Terminology
4.1.7 Marking (Section 14),
3.1 Lot Definitions:
4.1.8 Certification and reports (Section 13), and
3.1.1 ingot, n—no definition required.
4.1.9 Disposition of rejected material (Section 12).
3.1.2 A manufacturing lot shall consist of a material of the
5. Materials and Manufacture
samesize,shape,condition,andfinishproducedfromtheingot
orpowderblendbythesamerollingreductionscheduleandthe
5.1 The various tungsten flat products covered by this
same heat treatment parameters. Unless otherwise agreed
specification shall be formed with the conventional rolling,
between manufacturer and purchaser, a lot shall be limited to
forging, or extrusion equipment, normally found in primary
the product of an 8 h period for final continuous anneal, or to
ferrous and nonferrous plants.
a single furnace load for final batch anneal.
5.2 The ingot metal is consolidated employing either the
3.1.3 A chemical analysis lot shall consist of a single
powder metallurgy or vacuum-arc-casting process.
powder blend in the case of products manufactured from
6. Chemical Composition
6.1 The tungsten ingots or billets for conversion to finished
This specification is under the jurisdiction of ASTM Committee B10 on
products covered by this specification shall conform to the
Reactive and Refractory Metals and Alloys and is the direct responsibility of
Subcommittee B10.04 on Molybdenum and Tungsten.
requirements of the chemical composition prescribed in Table
Current edition approved May 1, 2013. Published May 2013. Originally
1.
approved in 1986. Last previous edition approved in 2007 as B760 – 07. DOI:
10.1520/B0760-07R13.
6.2 Heat Analysis:
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.2.1 Heat analysis is an analysis made by the manufacturer
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ofthemetalonarepresentativesampleofpowderfromasingle
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. powder blend in the case of material made from pressed and
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B760−07 (2013)
TABLE 1 Chemical Composition/Check Analysis
9. Permissible Variations in Dimensions
Composition, Permissible Variations in
Element 9.1 The thickness tolerances on tungsten products covered
max, % Check Analysis, %
by this specification shall be as specified in Table 2.
C 0.010 ±0.002
A
O 0.010 + 10 % relative
9.2 The width tolerances shall be as agreed upon between
N 0.010 + 0.0005
the manufacturer and the purchaser. In general, shearing
Fe 0.010 + 0.001
Ni 0.010 + 0.001 tolerancewillbe 6 ⁄16in.(61.6mm)andslittingtolerancewill
Si 0.010 + 0.001 1
be 6 ⁄32 in. (60.8 mm).
A
If chemical analysis is performed on a sample from the powder blend used to
9.3 The length and camber tolerances shall be as agreed
make the finished product, oxygen will be reported for information only.
upon between the manufacturer and the purchaser. In general,
length and camber tolerances will show a maximum deviation
of + ⁄16 in., − 0/ft (1.6 mm/m) of length.
sintered powder billets, or on a representative sample of a cast
ingot or intermediate product from that ingot in the case of
9.4 Flatness tolerances on tungsten flat products shall be as
material made from cast ingot.
follows:
6.2.2 Chemical lot analysis shall be as specified in Table 1,
Thickness, in.(mm) Flatness Deviation,
with the exception of oxygen which shall be reported for max,%
0.005–0.187 (0.13–4.75) 4
information only, and not be required to meet the requirements
0.188–0.625 (4.75–15.9) 5
of Table 1.
9.4.1 Determine flatness deviation (Fig. 1) as follows:
6.3 Check Analysis:
Flatnessdeviation, % 5 H/L 3100
~ !
6.3.1 Checkanalysisisananalysismadebythepurchaseror
the manufacturer of the metal after it has been processed into
where:
finished mill forms, and is either for the purpose of verifying
H = maximum vertical distance between a flat reference
the composition of a heat or lot, or to determine variations in
surface and the lower surface of the flat product, and
the composition within a heat or lot.
L = minimum horizontal distance between the highest point
6.3.2 Checkanalysistolerancesdonotbroadenthespecified
of the flat product where H is determined, and the point
heat analysis requirements but cover variations between labo-
of contact of the lower surface of the flat product with
ratories in the measurement of chemical content.
a flat reference surface.
6.3.3 Check analysis limits shall be as specified in Table 1.
6.3.4 The manufacturer shall not ship material that is
10. Workmanship, Finish, and Appearance
outside the limits specified in Table 1.
10.1 Cracks, seams, slivers, blisters, burrs, and other inju-
7. Metallurgical Condition rious imperfections shall not exceed standards of acceptability
agreed upon by the manufacturer and the purchaser.
7.1 Plate, sheet and foil shall be furnished in one of the
following conditions as designated on the purchase order:
10.2 Tungstenplate,sheet,andfoilshallbefreeofinjurious
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