ASTM F364-96(2019)
(Specification)Standard Specification for Molybdenum Flattened Wire for Electron Tubes
Standard Specification for Molybdenum Flattened Wire for Electron Tubes 
ABSTRACT
This specification covers two types of molybdenum flattened wire for electron tubes. These types are UNS R03604 and UNS R03603. The material shall conform to the prescribed limits of chemical composition such as carbon, oxygen, nitrogen, hydrogen, aluminum, calcium, silicon, iron, tungsten, potassium, and tin contents. The material shall be tested for hardness, temper, bending, and delamination.
SCOPE
1.1 This specification covers two types of molybdenum flattened wire up to 0.050 in. (1.27 mm) thick and up to 0.375 in. (9.52 mm) wide, specifically for use in electron tubes. The two grades have UNS numbers R03604 and R03603.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 The following safety hazards caveat pertains only to the test method described in this specification (see 10.2). This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:F364 −96 (Reapproved 2019)
Standard Specification for
Molybdenum Flattened Wire for Electron Tubes
ThisstandardisissuedunderthefixeddesignationF364;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Classification
1.1 This specification covers two types of molybdenum 3.1 Two types of molybdenum flattened wire are covered by
flattened wire up to 0.050 in. (1.27 mm) thick and up to 0.375
this specification:
in. (9.52 mm) wide, specifically for use in electron tubes. The
3.1.1 Type I, UNS R03604—This type shall have the com-
two grades have UNS numbers R03604 and R03603.
position limits prescribed in Table 1.
3.1.2 Type II, UNS R03603—This type shall be a high-
1.2 The values stated in inch-pound units are to be regarded
recrystallization-temperature material having the composition
as standard. The values given in parentheses are mathematical
limits prescribed inTable 1 and shall be capable of retaining its
conversions to SI units that are provided for information only
ductility after firing at a temperature of 2375 6 25°F (1300 6
and are not considered standard.
14°C) for at least 20 min.
1.3 The following safety hazards caveat pertains only to the
test method described in this specification (see 10.2). This
4. Ordering Information
standard does not purport to address all of the safety concerns,
if any, associated with its use. It is the responsibility of the user 4.1 Orders for material under this specification shall include
of this standard to establish appropriate safety, health, and the following information:
environmental practices and determine the applicability of 4.1.1 Quantity of each size,
regulatory limitations prior to use.
4.1.2 Dimensions or size (see 8.1),
1.4 This international standard was developed in accor-
4.1.3 Edgewise curvature (camber) if required (see 8.2),
dance with internationally recognized principles on standard-
4.1.4 Type (see 3.1),
ization established in the Decision on Principles for the
4.1.5 Temper (see 7.1), and
Development of International Standards, Guides and Recom-
4.1.6 How furnished (coils, spools, etc.).
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
5. Materials and Manufacture
5.1 The molybdenum wires covered by this specification
2. Referenced Documents
shall be made by any appropriate process.
2.1 ASTM Standards:
NOTE 1—It has been found that molybdenum wire made by the powder
E18 Test Methods for Rockwell Hardness of Metallic Ma-
metallurgy process will meet the requirements of this specification.
terials
E315 Test Methods for Chemical Analysis of Molybdenum
3 6. Chemical Composition
(Withdrawn 2010)
E384 Test Method for Microindentation Hardness of Mate- 6.1 Type I and Type II molybdenum wire shall conform to
rials the chemical compositions prescribed in Table 1.
6.2 The materials shall be analyzed in accordance with Test
Methods E315 or other appropriate ASTM methods when
This specification is under the jurisdiction of ASTM Committee F01 on
available. Other methods, as mutually agreed upon between
Electronics and is the direct responsibility of Subcommittee F01.03 on Metallic
seller and purchaser, may be employed.
Materials, Wire Bonding, and Flip Chip.
Current edition approved April 1, 2019. Published April 2019. Originally
approved in 1973. Last previous edition approved in 2014 as F364 – 96 (2014). 7. Physical Properties
DOI: 10.1520/F0364-96R19.
2 7.1 Temper—Material under this specification shall be sup-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM plied in one of the following classifications of temper:
Standards volume information, refer to the standard’s Document Summary page on
7.1.1 Hard—As-rolled, not stress-relieved, suitable for
the ASTM website.
3 spring applications, or
The last approved version of this historical standard is referenced on
www.astm.org. 7.1.2 Stress-Relieved— Suitable for bending or winding.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F364−96 (2019)
TABLE 1 Chemical Composition TABLE 3 Thickness and Load for Determination of Diamond
Pyramid Hardness or Vickers Hardness
Composition, max, ppm
Thickness, in. (mm) Load, gf
Element
Type I Type II
UNS R03604 UNS R03603
Less than 0.003 (0.08) 100
0.003 to 0.0050 (0.08 to 0.127), incl 200
Carbon 50 15
Over 0.050 to 0.100 (0.127 to 2.54), incl 500
Oxygen 80 175
Over 0.100 (2.54) 1000
Nitrogen 20 10
Hydrogen 10 10
Aluminum 150 150
Calcium 50 50
TABLE 4 Dimensional Tolerances
Silicon 100 350
Iron 100 100 Tolerance
Specified Thickness,
Tungsten 200 200 plus and mi-
in. (mm)
Potassium 150 150 nus, in. (mm)
Tin 25 25
Up to 0.0050 (0.127), incl 0.0002 (0.005)
Other elements, each 50 50
Over 0.0050 to 0.0100 (0.127 to 0.254), 0.0003 (0.008)
min % by difference
incl
Molybdenum 99.90 99.90
Over 0.0100 to 0.0200 (0.254 to 0.508), 0.0004 (0.010)
incl
Over 0.0200 to 0.0300 (0.508 to 0.762), 0.0005 (0.013)
incl
7.2 The hardness test (see 10.1) is to be used as the criterion Over 0.0300 to 0.0500 (0.762 to 1.270), 0.0010 (0.025)
incl
for identifying hard and stress-relieved materials in accordance
Tolerance plus
with Table 2.
Specified Width, in. (mm) and minus, in.
(mm)
7.2.1 When determining microhardness using light loads,
Up to 0.025 (0.64), incl 0.001 (0.02)
the thickness and load relationships shown in Table 3 are
Over 0.025 to 0.075 (0.64 to 1.90), in
...
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