ASTM B777-07

Standard Specification for Tungsten Base, High-Density Metal

ABSTRACT
This specification establishes the requirements for four classes of machinable, high-density tungsten base metal produced by consolidating metal powder mixtures, the composition of which is mainly tungsten. This material specification may be used for bare parts or for parts that may be coated with other materials for protection against corrosion and abrasion; intended for uses such as weights or counter-balances in static or dynamic balancing, high-speed rotating inertia members, radiation shielding, hypervelocity impact, and vibration-damping applications. The chemical; physical properties, such as microstructure and machinability; mechanical properties, such as tensile strength, yield strength, elongation, and hardness; and composition requirements, such as density; are detailed.
SCOPE
1.1 This specification covers the requirements for four classes of machinable, high-density tungsten base metal produced by consolidating metal powder mixtures, the composition of which is mainly tungsten. This material specification may be used for bare parts or for parts that may be coated with other materials for protection against corrosion and abrasion.
1.2 Intended Use—Parts made from this material are intended for uses such as weights or counter-balances in static or dynamic balancing, high-speed rotating inertia members, radiation shielding, hypervelocity impact, and vibration-damping applications.
1.3 Special Applications—For particular applications, properties or requirements other than those specified in Sections 5, 6, and 7 of this specification may be important. These alloys may contain elements which make them magnetic. Where freedom from magnetic response is required, this should be specified in the purchase order. Class 4 is not available in a non-magnetic grade. For purposes of this specification, non-magnetic material is defined as material having a maximum magnetic permeability of 1.05 (see Test Method B 193). Also for special applications involving large sections, methods for determining internal quality, such as mechanical tests on specimens from these larger sections or suitable nondestructive tests may be applied. If required, these additional tests shall be specified in the purchase order.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

General Information

• Status: Historical
• Publication Date: 31-Oct-2007
• ICS: 77.120.99 - Other non-ferrous metals and their alloys
• Technical Committee: B10 - Reactive and Refractory Metals and Alloys
• Drafting Committee: B10.04 - Molybdenum and Tungsten

Relations

• Replaces: ASTM B777-99 - Standard Specification for Tungsten Base, High-Density Metal
• Effective Date: 01-Nov-2007
• Replaced By: ASTM B777-07(2013) - Standard Specification for Tungsten Base, High-Density Metal
• Effective Date: 01-May-2013

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
Designation:B777 −07
StandardSpecification for
1
Tungsten Base, High-Density Metal
This standard is issued under the fixed designation B777; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope B193 Test Method for Resistivity of Electrical Conductor
Materials
1.1 This specification covers the requirements for four
B311 Test Method for Density of Powder Metallurgy (PM)
classes of machinable, high-density tungsten base metal pro-
Materials Containing Less Than Two Percent Porosity
duced by consolidating metal powder mixtures, the composi-
D3951 Practice for Commercial Packaging
tion of which is mainly tungsten. This material specification
E3 Guide for Preparation of Metallographic Specimens
may be used for bare parts or for parts that may be coated with
E8 Test Methods for Tension Testing of Metallic Materials
other materials for protection against corrosion and abrasion.
E18 Test Methods for Rockwell Hardness of Metallic Ma-
1.2 Intended Use—Parts made from this material are in-
terials
tended for uses such as weights or counter-balances in static or
E407 Practice for Microetching Metals and Alloys
dynamic balancing, high-speed rotating inertia members, ra-
2.2 Federal Standard:
diationshielding,hypervelocityimpact,andvibration-damping
3
Fed. Std. No. 151 Metals, Test Methods
applications.
1.3 Special Applications—For particular applications, prop-
3. Classification
erties or requirements other than those specified in Sections 5,
3.1 Thetungstenbasemetalshallbeofthefollowingclasses
6, and 7 of this specification may be important. These alloys
(see Table 1 and Table 2), as specified (see 4.1):
may contain elements which make them magnetic. Where
Class Tungsten, Nominal Wt.
freedom from magnetic response is required, this should be
%
specified in the purchase order. Class 4 is not available in a
non-magnetic grade. For purposes of this specification, non-
190
2 92.5
magnetic material is defined as material having a maximum
395
magnetic permeability of 1.05 (see Test Method B193). Also
497
for special applications involving large sections, methods for
determining internal quality, such as mechanical tests on
4. Ordering Information
specimens from these larger sections or suitable nondestructive
4.1 Orders for tungsten base, high-density metal should
tests may be applied. If required, these additional tests shall be
specify the following:
specified in the purchase order.
4.1.1 Title, designation, and year of issue of this
1.4 The values stated in inch-pound units are to be regarded
specification,
as the standard. The values given in parentheses are for
4.1.2 Class, (see 3.1),
information only.
4.1.3 Machinability requirements, if any (see 7.3),
4.1.4 Quantity,
2. Referenced Documents
4.1.5 Levels of preservation and packing (see 9.1),
2
2.1 ASTM Standards:
4.1.6 Special markings, if required (see 9.2),
A600 Specification for Tool Steel High Speed
4.1.7 Methodofhardnesstesting,ifdifferentfromRockwell
“ C” (see Table 1),
1
This specification is under the jurisdiction of ASTM Committee B10 on
4.1.8 Freedom of parts from magnetic response, if required
Reactive and Refractory Metals and Alloys and is the direct responsibility of
(see 1.3), and
Subcommittee B10.04 on Molybdenum and Tungsten.
4.1.9 Dimensions and tolerances.
Current edition approved Nov. 1, 2007. Published November 2007. Originally
approved in 1987. Last previous edition approved in 1999 as B777 - 99. DOI:
10.1520/B0777-07.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Standards volume information, refer to the standard’s Document Summary page on Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
the ASTM website. www.dodssp.daps.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B777−07
TABLE 1 Composition, Density and Hardness Properties
facilities for the performance of the inspection or any other
A,B
Nominal facility that is acceptable to the purchaser.
Hardness
Density,
Class Tungsten, Rockwell “C,”
g/cc
max
weight % 8.2 Responsibility for Compliance—All parts must meet all
1 90 16.85–17.25 32 the requirements agreed upon by purchaser and manufacturer
2 92.5 17.15–17.85 33
from Sections 4, 6 and 7. The inspections set forth in this
3 95 17.75–18.35 34
specification shall become a part of the manufacturer’s overall
4 97 18.25–18.85 35
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:B777–99 Designation: B 777 – 07
Standard Specification for
1
Tungsten Base, High-Density Metal
This standard is issued under the fixed designation B 777; 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.
1. Scope
1.1 This specification covers the requirements for four classes of machinable, high-density tungsten base metal produced by
consolidation of consolidating metal powder mixtures of which mixtures, the composition of which is mainly tungsten. This
material specification may be used for bare parts or be used for parts that may be coated with other materials for protection against
corrosion and abrasion.
1.2 Intended Use—Parts made from this material are intended for uses such as weights or counter-balances in static or dynamic
balancing, high-speed rotating inertia members, radiation shielding, hypervelocity impact, and vibration-damping applications.
1.3 Special Applications—For particular applications, properties or requirements other than those specified in Sections 5, 6, and
7 of this specification may be important. These alloys may contain elements which make them magnetic. Where freedom from
magnetic response is required, this should be specified in the purchase order. Class 4 is not available in a non-magnetic grade. For
purposes of this specification, non-magnetic characteristics arematerial is defined as material having a maximum magnetic
permeability of 1.05 (see Test Method B 193). Also for special applications involving large sections, methods for determining
internal quality, such as mechanical tests on specimens from these larger sections or suitable nondestructive tests may be applied.
If required, these additional tests shall be specified in the purchase order.
1.4 The values stated in inch-pound units are to be regarded as the standard.The values given in parentheses are for information
only.
2. Referenced Documents
2
2.1 ASTM Standards: A600Specification for Tool Steel Highspeed
A 600 Specification for Tool Steel High Speed
B 193 Test Method for Resistivity of Electrical Conductor Materials
B 311 Test Method for Density Determination for Powder Metallurgy (P/M) Materials Containing Less thanThan Two Percent
Porosity
D 3951 Practice for Commercial Packaging
E 3Test Methods Guide for Preparation of Metallographic Specimens
E 8 Test Methods for Tension Testing of Metallic Materials
6
E 18Test Methods for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials
Test Methods for Rockwell Hardness of Metallic Materials
E 407 Practice for Microetching Metals and Alloys
2.2 Federal Standard:
3
Fed. Std. No. 151 Metals, Test Methods
3. Classification
3.1 The tungsten base metal shall be of the following classes (see Table 1 and Table 2), as specified (see 4.1):
1
This specification is under the jurisdiction ofASTM Committee B-10B10 on Reactive and Refractory Metals andAlloys and is the direct responsibility of Subcommittee
B10.04 on Molybdenum and Tungsten.
Current edition approved Dec. 10, 1999.Nov. 1, 2007. Published January 2000.November 2007. Originally published as B777-87.approved in 1987. Last previous edition
e1
B777-87(Reapproved1993) .approved in 1999 as B 777 - 99.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
, Vol 01.05.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Annual Book of ASTM Standards, Vol 02.03.
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
B777–07
TABLE 1 Composition, Density and Hardness Properties
A,B
Nominal Hardness
Density,
Class Tungsten, Rockwell “C”,”
g/cc
weight % max
1 90 16.85–17.25 32
2 92.5 17.15–17.85 33
3 95 17.75–18.35 34
4 97 18.25–18.85 35
A
When specified by the purchaser, other hardness testing methods may be
employed.
B
For mechanically worked or aged material, the hardness can be as high as R
c46.
TABLE 2 Mechanical Properties, Minimum Values
Yield Strength
Ultimate Tensile
at 0.2 % Off- A
Elongation,
Strength
Class
set
%
...