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P/M Material Specifications for Self-Lubricating Bearings |
| Grade |
Material |
Composition % |
Typical
Values |
Recommendations |
Equivalent
Specifications |
Density
g/cc
|
Porosity
Volume
% (min) |
Strength
Constant
"K" PSI |
Tensile
Strength
PSI |
Elongation
%, in 1" |
Compressive
Yield Strength
(0.1%) PSI |
| G-72 |
Diluted
Bronze |
Fe.
55 - 62
Cu: 34 - 38
Sn: 3 - 4
Other: 2.0 max |
6.0
- 6.4 |
17 |
30,000 |
|
|
|
Low
cost bearing material used at light to medium loads and medium to high
speed. |
MPIF:
FCTG - 3604 - K22 |
| G-117
LD |
Bronze |
Cu:
87.2 - 90.5
Sn: 9.5 - 10.5
Graphite: 0 - 0.3
Other: 2.0 max |
6.0
- 6.4 |
24 |
19,000 |
10,000 |
|
7,500 |
General
purpose bearing material |
MPIF:
CT- 1000 - K19
ASTM: B 438 - 83a
 Class A, Type 1
|
| G-117 |
Bronze |
Cu:
87.2 - 90.5
Sn: 9.5 - 10.5
Graphite: 0 - 0.3
Other: 2.0 max |
6.4
- 6.8 |
19 |
26,000 |
15,000 |
2 |
11,000 |
Ensure
some ductility and also resist shock loading. |
MPIF:
CT - 1000 - K26
ASTM: B 438 - 83a
Class A, Type II
DIN: SINT - A50 |
| G-117
HD |
Bronze |
Cu:
87.2 - 90.5
Sn: 9.5 - 10.5
Graphite: 0 - 0.3
Other: 2.0 max |
6.8
- 7.2 |
12 |
37,000 |
20,000 |
3 |
19,500 |
More
ductility and will support higher loads. Used in lower speed applications
and are often used as a combination of structural parts and bearings. |
MPIF:
CT - 1000 - K37
ASTM: B 438 - 83a
Class A, Type III
DIN: SINT - B50 |
| G-243 |
High
Strength
Bronze |
Cu:
87 - 89
Phos-Cu: 3
Sn: 8
Other: 1.0 max |
6.8
- 7.2 |
12 |
40,000 |
24,000 |
3 |
21,000 |
Used
for lower speed applications but has excellent strength for combination
of structural parts and bearings. |
MPIF:
CT - 1000 - K37
ASTM: B 438 - 83a
Class A, Type III
DIN: SINT - B50 |
| G-220-1 |
Bronze
(Medium
Graphite) |
Cu:
85.7 - 90.0
Sn: 9.5 - 10.5
Graph.: 0.5 - 1.8
Other: 2.0 max |
6.4
- 6.8 |
17 |
23,000 |
12,000 |
2 |
10,000 |
These
bearings will operate under heavy loads and high speeds and under moderately
abrasive conditions. |
MPIF:
CT - 1001 - K23
ASTM: B 438 - 83a
Class B, Type II
DIN: SINT - B51 |
| G-220-2 |
Bronze
(Medium
Graphite) |
Cu:
85.7 - 90.0
Sn: 9.5 - 10.5
Graph.: 0.5 - 1.8
Other: 2.0 max |
6.8
- 7.2 |
9 |
33,000 |
15,000 |
2 |
12,000 |
These
bearings will operate under heavy loads and high speeds and under moderately
abrasive conditions. |
MPIF:
CT - 1001 - K33
ASTM: B 438 - 83a
Class B, Type III
DIN: SINT - C51 |
| G-240 |
Bronze
(High
Graphite) |
Cu:
82.5 - 87.5
Sn: 9.5 - 10.5
Graph.: 3.0 - 5.0
Other: 2.0 max |
5.8
- 6.2 |
11 |
10,000 |
|
|
|
These
bearings run very quietly. They tend to require less field lubrication
and operate at somewhat higher temperatures. |
MPIF:
CTG - 1004 - K10 |
| G-242 |
Bronze
(High
Graphite) |
Cu:
82.5 - 87.5
Sn: 9.5 - 10.5
Graph.: 3.0 - 5.0
Other: 2.0 max |
6.2
- 6.6 |
4 |
15,000 |
|
|
|
These
bearings run very quietly. They tend to require less field lubrication
and operate at somewhat higher temperatures. |
MPIF:
CTG - 1004 - K15 |
| I-12 |
Iron |
Fe:
97.7 - 100.0
Carbon: 0-0.3
Other: 2.0 max |
6.0
- 6.4 |
17 |
23,000 |
18,000 |
1.5 |
16,000 |
Used
as a bearing material for meduim loads. Typically harder and stronger
than 90-10 bronze at same density. |
MPIF:
F - 0000 - K23
ASTM: B 439 - 83
Grade 1
DIN: SINT - B00 |
| I-14 |
Iron,
Carbon |
Fe:
97.1 - 99.4
Carbon: 0.6-0.9
Other: 2.0 max |
6.0
- 6.4 |
17 |
32,000 |
35,000 |
0.5 |
41,000 |
These
bearings result in a stronger than pure iron with higher crushing strength,
greater wear resistance and higher compressive strength. |
MPIF:
F - 0008 - K32
ASTM: B 439 - 83
Grade 2
DIN: SINT - B11 |
| I-43 |
Iron-Graphite |
Fe:
93.9 - 97.2
Graph.: 2.5-3.5
Other: 2.0 max |
6.0
- 6.4 |
12 |
16,000 |
15,000 |
1 |
|
This
material has excellent damping characteristics and results in quiet running.
May be impregnated with oil. |
MPIF:
FG - 0303 - K16 |