Carbon graphite is used as a soft material in a wide range of applications, from wet running to dry running. It provides:
- Excellent natural lubricity
- Good thermal conductivity
- Outstanding thermal shock resistance
- Good corrosion resistance
Mechanical carbon has been developed in different grades to meet various service conditions:
- Resin bonded carbon: An economic, pressed to size material for large volume requirements
- Resin impregnated carbon: Furan resin, Phenolic resin, or Epoxy resin are used as filler to decrease the porosity of carbon
- Metal impregnated carbon: Antimony, Copper, or Babbitt alloys are used as filler for applications requiring higher working temperatures or higher strength.
Parameter |
Unit |
J1118F |
J2163K |
Resin Bonded Carbon |
Density |
g/cm 3 |
1.70 |
1.82 |
1.68 |
Impregnation |
|
Phenolic Resin |
Furan Resin |
Phenolic Resin |
Hardness |
|
HS 85 |
HS 90 |
HS 60 |
Compressive Strength |
MPa |
210 |
220 |
147 |
psi |
30, 000 |
31, 800 |
21, 300 |
Flexural Strength |
MPa |
65 |
75 |
54 |
psi |
9, 500 |
10, 100 |
7, 800 |
Porosity |
% |
1.0 - 2.0 |
1.0 - 2.0 |
0.3 |
Coefficient of
Thermal Expansion |
1 x 10 -6 / K |
5 |
5.5 |
- |
Maximum Working Temperature |
o C |
200 |
200 |
200 |
o F |
400 |
400 |
400 |
Parameter |
Unit |
J2163D |
J3120P |
J3120B |
J3254B |
J3254D |
Density |
g/cm 3 |
2.3 - 2.5 |
2.8 |
2.5 |
2.5 |
2.6 |
Impregnation |
|
Antimony |
Copper Alloy |
Babbitt |
Babbitt |
Antimony |
Hardness |
|
HS 95 |
HS 80 |
HS 65 |
HS 35 |
HS 38 |
Compressive Strength |
MPa |
260 |
240 |
150 |
80 |
80 |
psi |
37, 700 |
34, 800 |
21, 750 |
|
|
Flexural Strength |
MPa |
95 |
75 |
60 |
40 |
40 |
psi |
13, 800 |
11, 000 |
8, 700 |
|
|
Porosity |
% |
2.5 |
2 |
3 |
5 |
5 |
Coefficient of
Thermal Expansion |
1 x 10 -6 / K |
6 |
6.2 |
5 |
5.2 |
6.5
|
Maximum Working Temperature |
o C |
400 |
400 |
200 |
200 |
350 |
o F |
750 |
750 |
400 |
|
|