ASTM B823-93
(Specification)Standard Specification for Materials for Nonferrous Powder Metallurgy (P/M) Structural Parts
Standard Specification for Materials for Nonferrous Powder Metallurgy (P/M) Structural Parts
SCOPE
1.1 This specification covers a variety of nonferrous powder metallurgy (P/M) structural materials and includes a classification system, or material designation code. With the classification system, this specification includes chemical composition and minimum tensile yield strength.
1.2 The property values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
Note 1--Paragraphs 6.1 and 8.1 govern material classification by the designation code. The classification system is explained in the Appendix.
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Designation: B 823 – 93
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
Materials for Nonferrous Powder Metallurgy (P/M) Structural
Parts
This standard is issued under the fixed designation B 823; 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 4.2.3 Density (see 7.1),
4.2.4 Porosity and oil content (see 7.2), and
1.1 This specification covers a variety of nonferrous powder
4.2.5 Special packaging, if required.
metallurgy (P/M) structural materials and includes a classifi-
cation system, or material designation code. With the classifi-
5. Materials and Manufacture
cation system, this specification includes chemical composition
5.1 Structural parts shall be made by pressing and sintering
and minimum tensile yield strength.
metal powders. Parts may also be made by repressing and
1.2 The property values stated in inch-pound units are to be
resintering sintered parts, if necessary, to produce finished parts
regarded as the standard. The values given in parentheses are
in conformance with the requirements of this specification.
for information only.
NOTE 1—Paragraphs 6.1 and 8.1 govern material classification by the 6. Chemical Composition
designation code. The classification system is explained in the Appendix.
6.1 The material shall conform to the requirements provided
in Table 1.
2. Referenced Documents
6.2 Chemical analysis, if required, shall be performed by
2.1 ASTM Standards:
any method agreed upon by the manufacturer and the pur-
B 243 Terminology of Powder Metallurgy
chaser.
B 328 Test Method for Density, Oil Content, and Intercon-
nected Porosity of Sintered Powder Metal Structural Parts
7. Physical Properties
and Oil-Impregnated Bearings
7.1 Density:
2.2 Other Standard:
7.1.1 The buyer and the seller may agree upon a minimum
MPIF Standard 35, Materials Standard for P/M Structural
average density for the part and minimum densities for specific
Parts
regions of the part.
7.1.2 Density shall be determined in accordance with Test
3. Terminology
Method B 328.
3.1 Definitions—Definitions of powder metallurgy terms
7.2 Porosity:
can be found in Terminology B 243. Additional descriptive
7.2.1 The buyer and the seller may agree upon a minimum
information is available in the Related Materials section of Vol
volume oil content for parts that are to be self-lubricating.
02.05 of the Annual Book of ASTM Standards.
7.2.2 The buyer and the seller may agree upon a functional
test for porosity in parts that are to be self-lubricating, or for
4. Ordering Information
permeability where fluid flow must be restricted.
4.1 Materials for parts covered by this specification shall be
ordered by materials designation code.
8. Mechanical Properties
4.2 Orders for parts under this specification may include the
8.1 The minimum guaranteed tensile yield strength, as
following information:
shown in Table 2, is a numerical suffix to the material
4.2.1 Certification, if required (see Section 10),
designation code and is read as 10 psi. The code is adopted
4.2.2 Test methods and mechanical properties other than
from MPIF Standard 35. All tensile yield strengths are defined
strength (see 8.2 and 8.3),
as the 0.2 % offset yield strengths.
8.2 The purchaser and manufacturer should agree upon the
This test method is under the jurisdiction of ASTM Committee B-9 on Metal
method to be used to verify the minimum strength character-
Powders and Metal Powder Products and is the direct responsibility of Subcom-
istics of the finished parts. Since it is usually impossible to
mittee B09.05 on Structural Parts.
machine tensile test specimens from these parts, alternative
Current edition approved Aug. 15, 1993. Published November 1993. Originally
published as B 823 – 92. Last previous edition B 823 – 92. strength tests are advisable. An example would be measuring
Annual Book of ASTM Standards, Vol 02.05.
the force needed to break teeth off a gear with the gear properly
Available from Metal Powder Industries Federation, 105 College Road East,
fixtured.
Princeton, NJ 08540.
B 823
TABLE 1 Chemical Requirements
A
Chemical Composition, %
Material
Designation
Cu Zn Pb Sn Ni
CZ-1000 88.0 remainder . . . min
91.0 remainder . . . max
CZP-1002 88.0 remainder 1.0 . . min
91.0 remainder 2.0 . . max
CZP-2002 77.0 remainder 1.0 . . min
Pressing Area 5 1.00 in.
80.0 remainder 2.0 . . max
CZ-3000 68.5 remainder . . . min Note—Dimensions specified, except G and T are those of the die.
Dimensions
71.5 remainder . . . max
CZP-3002 68.5 remainder 1.0 . . min
in. mm
71.5 remainder 2.0 . . max
A—Half length of reduced section ⁄8 15.88
CNZ-1818 62.5 remainder . . 16.5 min
65.5 remainder . . 19.5 max B—Grip length 3.1876 0.001 80.95 6 0.03
CNZP-1816 62.5 remainder 1.0 . 16.5 min C—Width of grip section 0.343 6 0.001 8.71 6 0.03
65.5 remainder 2.0 . 19.5 max D—Width at center 0.225 6 0.001 5.72 6 0.03
CT-1000 87.5 remainder . 9.5 . min E—End radius 0.171 6 0.001 4.34 6 0.03
90.5 remainder . 10.5 . max F—Half width of grip section 0.171 6 0.001 4.34 6 0.03
G—Gage length 1.000 6 0.003 25.40 6 0.08
A
Other elements: the total by difference equals 2.0 % maximum, which may
L—Overall length 3.529 6 0.001 89.64 6 0.03
include other minor elements added for specific purposes.
R—Radius of fillet 1 25.4
T—Compact to this thickness 0.140 to 0.250 3.56 to 6.35
W—Width at end of reduced section 0.235 6 0.001 5.97 6 0.03
TABLE 2 Minimum Yield Strength for Nonferrous Alloys
FIG. 1 Standard Flat Unmachined Tension Test Specimen for
Material Designation Minimum Yield
Code Strength, 10 psi
Powder Metallurgy Products
CZ-1000-9 9
-10 10
order, at least one sample for chemical analysis shall be taken
-11 11
CZP-1002-7 7 from each lot. The analysis shall be performed by a mutually
CZP-2002-11 11
agreed upon method.
-12 12
9.3 Mechanical Tests—The manufacturer and the purchaser
CZ-3000-14 14
-16 16 shall agree upon a representative number of specimens for
CZP-3002-13 13
mechanical tests.
-14 14
CNZ-1818-17 17
10. Rejection and Rehearing
CNZP-1816-13 13
CT-1000-13 (repressed) 13
10.1 Parts failing to conform to the requirements of this
specification may be rejected. Rejection should be reported to
the producer or supplier promptly and in writing.
8.3 The tensile yield strength of the part may be measured
indirectly by testing flat tensile bars (See Fig. 1) molded from
11. Certification
the same mixed powder lot at the density of the critical region
11.1 When specified in the purchase order or contract
...
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