ASTM B387-90(1995)e1

Standard Specification for Molybdenum and Molybdenum Alloy Bar, Rod, and Wire

SCOPE
1.1 This specification covers unalloyed molybdenum and molybdenum alloy bar, rod, and wire as follows:  
1.1.1 Molybdenum 360—Unalloyed vacuum arc-cast molybdenum.  
1.1.2 Molybdenum 361—Unalloyed powder metallurgy molybdenum.  
1.1.3 Molybdenum Alloy 363—Vacuum arc-cast molybdenum-0.5% titanium-0.1% zirconium (TZM) alloy.  
1.1.4 Molybdenum Alloy 364—Powder metallurgy molybdenum-0.5% titanium-0.1% zirconium (TZM) alloy.  
1.1.5 Molybdenum 365—Unalloyed vacuum arc-cast molybdenum, low carbon.  
1.1.6 Molybdenum Alloy 366—Vacuum arc-cast molybdenum, 30% tungsten alloy.  
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.

General Information

• Status: Historical
• Publication Date: 31-Dec-1994
• Technical Committee: B10 - Reactive and Refractory Metals and Alloys
• Drafting Committee: B10.04 - Molybdenum and Tungsten

Relations

• Replaced By: ASTM B387-90(2001) - Standard Specification for Molybdenum and Molybdenum Alloy Bar, Rod, and Wire (Withdrawn 2010)
• Effective Date: 01-Jan-1995

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
e1
Designation: B 387 – 90 (Reapproved 1995)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Molybdenum and Molybdenum Alloy Bar, Rod, and Wire
This standard is issued under the fixed designation B 387; 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.
e NOTE—Keywords were added editorially in June 1995.
1. Scope 4. Ordering Information
1.1 This specification covers unalloyed molybdenum and 4.1 Orders for material under this specification shall include
molybdenum alloy bar, rod, and wire as follows: the following information as applicable:
1.1.1 Molybdenum 360—Unalloyed vacuum arc-cast mo- 4.1.1 Material number and temper designation (Section 1
lybdenum. and Table 3 ),
1.1.2 Molybdenum 361—Unalloyed powder metallurgy mo- 4.1.2 Product form (Section 3),
lybdenum. 4.1.3 Chemical requirements (Table 1 and Table 2),
1.1.3 Molybdenum Alloy 363—Vacuum arc-cast molybde- 4.1.4 Mechanical requirements (Section 7),
num–0.5 % titanium–0.1 % zirconium (TZM) alloy. 4.1.5 Softening temperature (Section 8),
1.1.4 Molybdenum Alloy 364—Powder metallurgy molyb- 4.1.6 Tolerances (Section 9 and Table 4),
denum–0.5 % titanium–0.1 % zirconium (TZM) alloy. 4.1.7 Workmanship and quality level requirements (Section
1.1.5 Molybdenum 365—Unalloyed vacuum arc-cast mo- 10),
lybdenum, low carbon. 4.1.8 Packaging (Section 16),
1.1.6 Molybdenum Alloy 366—Vacuum arc-cast molybde- 4.1.9 Marking (Section 15),
num, 30 % tungsten alloy. 4.1.10 Certification and reports (Section 14), and
1.2 The values stated in inch-pound units are to be regarded 4.1.11 Disposition of rejected material (Section 13).
as the standard. The values given in parentheses are provided
5. Materials and Manufacture
for information purposes only.
5.1 The various molybdenum mill products covered by this
2. Referenced Documents
specification shall be manufactured with the conventional
extrusion, forging, swaging, rolling, and drawing equipment
2.1 ASTM Standards:
normally found in primary ferrous and nonferrous plants. The
E 8 Test Methods for Tension Testing of Metallic Materials
ingot metal for Molybdenum 360 and 365 and Molybdenum
F 289 Specification for Molybdenum Wire and Rod for
Alloys 363 and 366 is vacuum arc-melted in furnaces of a type
Electronic Applications
suitable for reactive, refractory metals, and for Molybdenum
3. Terminology
361 and 364 the metal is consolidated by powder metallurgy
methods.
3.1 Definitions of Terms Specific to This Standard:
3.1.1 bar and rod—any straight product with a round,
6. Chemical Composition
rectangular, hexagonal, or octagonal solid cross section, 4 in.
6.1 The molybdenum and molybdenum alloy ingots and
(101.6 mm) in diameter or less, or of equivalent cross-sectional
billets for conversion to finished products covered by this
area.
specification shall conform to the requirements of the chemical
3.1.2 wire—any product furnished in coils or on spools or
composition prescribed in Table 1.
reels.
6.2 Check Analysis:
NOTE 1—This specification covers wire no smaller than 0.020 in. (0.51
6.2.1 Check analysis is an analysis made by the purchaser or
mm) in diameter or of equivalent cross-sectional area. Specification F 289
the manufacturer of the metal after it has been processed into
covers diameters up to 0.020 in.
finished mill forms, and is either for the purpose of verifying
the composition of a heat or lot or to determine variations in the
1 composition within a heat or lot.
This specification is under the jurisdiction of ASTM Committee B-10 on
6.2.2 Check analysis tolerances do not broaden the specified
Reactive and Refractory Metals and Alloys and is the direct responsibility of
Subcommittee B10.04 on Molybdenum and Tungsten.
heat analysis requirements but cover variations between labo-
Current edition approved Sept. 28,1990. Published January 1991. Originally
ratories in the measurement of chemical content.
published as B 387 – 62 T. Last previous edition B 387 – 85.
6.2.3 The manufacturer shall not ship material that is
Annual Book of ASTM Standards, Vol 03.01.
Annual Book of ASTM Standards, Vol 10.04. outside the limits specified in Table 1 for the applicable type,
B 387
TABLE 1 Chemical Requirements
Composition, %
Element Material Number
360 361 363 364 365 366
C 0.030 max 0.010 max 0.010–0.030 0.010–0.040 0.010 max 0.030 max
A
O, max 0.0015 0.0070 0.0030 0.030 0.0015 0.0025
A
N, max 0.002 0.002 0.002 0.002 0.002 0.002
Fe, max 0.010 0.010 0.010 0.010 0.010 0.010
Ni, max 0.002 0.005 0.002 0.005 0.002 0.002
Si, max 0.010 0.010 0.010 0.005 0.010 0.010
Ti . . 0.40–0.55 0.40–0.55 . .
W . . . . . 27–33
Zr . . 0.06–0.12 0.06–0.12 . .
Mo balance balance balance balance balance balance
A
Pending approved methods of analysis, deviations from these limits alone shall not be cause for rejection.
TABLE 2 Permissible Variations in Check Analysis
9. Permissible Variations in Dimensions
Check Analysis Permissible
9.1 Diameter, and out-of-round tolerances on molybdenum
Limits, max or Variations in
Material No.
and molybdenum alloy products covered by this specification
range, % Check Analy-
sis, %
shall be as specified in Table 4.
9.2 Length and straightness tolerances and limitations shall
C 360, 363, 364, 366, 361, 365 0.010–0.040 60.005
0.010 60.002
be as follows:
A
O 361 0.0070 +10 % relative
9.2.1 Cut lengths, 6 ⁄4 in. (6.35 mm).
360, 363, 365, 366 0.0030 +10 % relative
9.2.2 Straightness, maximum deviation of 0.050 in./ft (1.27
364 0.030 +10 % relative
A
N 361, 364, 365 0.0020 +0.0005
mm/305 mm) in any length.
360, 363, 366 0.0010 + 0.0005
9.3 Permissible variations in dimensions for wire, square, or
Fe 360, 361, 363, 364, 365, 366 0.010 +0.001
rectangular bars, and hexagonal or octagonal rods, shall be as
Ni 360, 361, 363, 364, 365, 366 0.005 +0.0005
Si 360, 361, 363, 364, 365, 366 0.010 +0.002
agreed upon between the manufacturer and the purchaser.
Ti 363, 364 0.40–0.55 60.05
W 366 27.0–33.0 61.0
10. Workmanship, Finish, and Appearance
Zr 363, 364 0.06–0.12 60.02
A
10.1 Molybdenum and molybdenum alloy bar, rod, and wire
See Table 1, Footnote A.
shall be free of injurious external and internal imperfections of
a nature that will interfere with the purpose for which it is
with the exception of oxygen and nitrogen, whose percentage
intended.
may vary with the method of fabrication.
10.2 Material may be finished as forged, rolled, swaged, or
6.2.4 Check analysis limits shall be as specified in Table 2.
drawn (black), as cleaned, as machined, or as ground.
10.3 The manufacturer shall be permitted to remove surface
7. Mechanical Properties
imperfections provided such removal does not reduce the
7.1 Material supplied under this specification shall conform
dimension below the minimum permitted by the tolerance for
to the mechanical property requirements give
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