ASTM B202-64

Specification for Metal Powder Sintered Bearings (Oil Impregnated) (Withdrawn 1965)

General Information

• Status: Withdrawn
• Technical Committee: B09 - Metal Powders and Metal Powder Products
• Drafting Committee: B09.03 - Refractory Metal Powders

Standards Content (Sample)

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Standard Specifications for
1\tIETAL POWDER SINTERED BEARINGS
1
(OIL IMPREGNATED)
ASTM Designation: B 202 - 64
•
1
ADOPTED, 1964.
This Standard of the American Society for Testing and Materials is issued
under the fixed designation B 202; the final number indicates the year of orig­
inal adoption as standard or, in the case of revision, the year of last revision.
Scope Basis of Purchase
2. Orders for material under these
1. These specifications cover sintered,
specifications shall include the following
metal powder, oil-impregnated bearings
information:
of two types and four classes as follows:
(I) Grade (Section 1),
(a) Grade I, Copper Base:
(2) Dimensions (Note), and
Class A, Copper-Tin
(J) Certification (Section 10 (b)).
Class B, Copper-Lead-Tin
NOTE. -Commercial dimensional tolerances
NoTE.-The compositions included in grade I
are given in Table VI.
are intended to be equivalent so far as appli­
cation is concerned, the different compositions
Manufacture
representing the products supplied by different
3. Bearings shall be made by briquet­
manufacturers for the same service.
ting and sintering metal powders so as to
(b) Grade II, Iron Base:
produce finished parts conforming to the
Class A, Iron-Carbon
requirements of these specifications.
Class B, Iron-Copper
Chemical Requirements
NOTE.-The compositions in class A repre­
4. The material shall conform to the
sent different mechanical properties and must
be identified by subclasses since they constitute
requirements as to chemical composition
separate specifications. The copper content of
prescribed in Table I.
class B may vary over rather wide limits.
Density
1
Under the standardization procedure of the
Society, these specifications are under the juris­
5. (a) The density of bearings supplied
diction of the ASTM Committee B-9 on Metal
fully impregnated with lubricant shall be
Powder and Metal Powder Products.
2
Adopted :1.,- standard August :31, 19li-t, 1,_v
within the limits prescribed in Table .II
action of the Society t\t the .-\nn11:.1.l '.\'leeting
for the type and class specified.
and confirming letter ballot.
Prior to adoption as standard, these :specifi­
(b) Density shall be determined in ac­
cations were published as tentative from 1945
cordance with the Methods or'Test for
to 1964, being published in 1951, H:155, 1958,
Density and Interconnected Porosity of
and HIGO.
,,--,
_.,.,
&-711
Reproduced By GLOBAL
ENGINEERING DOCUMEN'IS
With The Pennission Of ASTM
Under Ro~alty Agreement

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254 METAL POWDER SI~TERED BEARINGS (OIL IMPREGNATED) (B 202)
TABLE !.-CHEMICAL REQUIREMENTS.
-
Grade I, Copper Base Grade II, Iron Base
-
Class A
Class A Class B Class B
Al Al
A3
-
Copper, per cent . 82.6
Si.5
{ 1.0 to u.
0
. . . . . . . . .
to 90.5 to 88.5
18.0 to 22.o
Iron, per cent . 1.0 max l.0max 96.25 min 95.9 min 95.6 min remainder-
Tin, per cent . 9.5 9.5 . . . . . . . . . . . . ■ •••
to 10.5 to 10.5
. . . . 2.0
Lead, per cent . . . . . . . . . . . . . . .
to 4.0
Zinc, max, per cent . . . . . 0.75 . . . . . . . . ■ ••• . .
Nickel, max, per cent . . . . . 0.35 . . . . . . . . . . . . . .
Antimony, max, per
cent .
. . . . 0.25 . . . . . . . . . . . .
Silicon, max, per cent . . . . . . . . . 0.3 .
0.3 0.3
Aluminum, max, per
cent . . . . . . . . . 0.2 0.2 0.2 . .
1. 75c
Carbon, max, per cent . 1.75• . . . . . . . . . . . . . .
Total other elements by
difference, max, per
cent . 0.5 0.5 3.0 3.0 3.0 3.0
Combined carbon° (on
basis of iron only) . . . . . . . . .
0.25 max 0.25 0.60 .
to 0.60 to 1.00
a The combined carbon may be a mctallographic estimate of the carbon in the iron.
• Total of iron plus copper shall be 97 per cent, min.
• Commonly graphite. A maximum of 1.5 per cent of another type of solid lubricant may be
substituted when authorized by the purchaser.
TABLE IL-DENSITY REQUIREMENTS.
TABLE IV.-MAXIMUM NUMBEH. OF
PIECES IN LOT.
I Density, i; per
1 cu cm
Maximum
! _____ _
Gra Weight of 1000 Pieces, lb
Number of
Pieces in Lot
min max
Up to 10, excl . . 60 000
I, Copper base A. (i.4 6.8
10 to 50, excl. . . 30 000
B . ·I 6.5 6.9
50 to 100, e.xcl . .
10 000
I
100 and over . . 5 000
II, Iron base . A . I 5. 7 6.1
6.2
B . ·I 5.8
Sintered Powder Metal Structural Parts
and Oil Impregnated Bearings (ASTM
8
Designation: B 328).
Porosity
TABLE !IL-STRENGTH CONSTANTS.a
6. Porosity in terms of intercon­
nected void space shall not be less than
K (strength
Grade I
• Class constant)
18 per cent for all classes when deter­
------1-------,----
mined in accordance with AST
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