High density carbon, graphite, carbographite, carbon-carbon-composite materials and components.

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High Density Carbon & Graphite Materials Specifications

General purpose graphite

Main Characteristic	General purpose low spec	General purpose low spec	General purpose mid spec	General purpose high spec	General purpose high spec
Grade	GP10	GP15	GP20	GP25	GP30
Average grain size- microns	15	15	12	5	8
Density -  g/cc	1.78	1.78	1.79	1.83	1.86
Porosity-   %	10%	11%	11%	10%	8%
Thermal Conductivity-W/mK	85	115	92	69	68
CTE-microns/m.degC	4.6	4.5	5.5	5.7	5.9
Flexural Strength- Mpa	43	40	52	75	65
Compressive Strength- Mpa	93	80	106	170	155
Youngs Modulus - Gpa	9.2	9.9	10	13	12
Shore Hardness	53	52	62	79	76
Resistivity- uOhm cm	1600	1100	1340	1540	1640
Max operating temp- in air	500 deg C	500 deg C	500 deg C	500 deg C	500 deg C
-in vacuum	2200 degC	2200 degC	2200 degC	2200 degC	2200 degC
-in innert gas	2000 degC	2000 degC	2000 degC	2000 degC	2000 degC

 

Specialist Graphite Grades

Main Characteristic	Densified	High thermal conductivity	High electrical reststivity	High strength & expansion	High strength & expansion densified	Ultra fine grained high expansion
Grade	SPG35	SPG40	SPG45	SPG50	SPG55	SPG60
Average grain size- microns	13	10	5	4	4	<1
Density -  g/cc	1.88	1.82	1.65	1.77	1.77	1.79
Porosity-   %	4%	10%	25%	20%	4%	20%
Thermal Conductivity-W/mK	111	140	75	95	95	72
CTE-microns/m.degC	5	4.8	7.7	8.1	8.1	8.1
Flexural Strength- Mpa	57	54	53	85	85	110
Compressive Strength- Mpa	126	90	105	140	140	195
Youngs Modulus - Gpa	12.6	11	9	11	11	14.5
Shore Hardness	65	55	68	74	74	85
Resistivity- uOhm cm	1170	900	1900	1500	1500	1750
Max operating temp- in air	500 deg C	500 deg C	500 deg C	500 deg C	500 deg C	500 deg C
-in vacuum	2200 degC	2200 degC	2200 degC	2200 degC	2200 degC	2200 degC
-in innert gas	2000 degC	2000 degC	2000 degC	2000 degC	2000 degC	2000 degC

 

Oxidation Resistant Graphite Grades

Main Characteristic Oxidation resistant plus:	Boronised wear resistant	Phosphated high strength	Phosphated high thermal conductivity	Phosphated General purpose mid spec	Phosphated General purpose high spec
Grade	HTBG210	HTG300	HTG350	HTG400	HTG450
Average grain size- microns	10	5	10	13	5
Density -  g/cc	1.85	1.87	1.82	1.85	1.86
Porosity-   %	10%	21%	10%	11%	10%
Thermal Conductivity-W/mK	30	60	140	85	70
CTE-microns/m.degC	4.6	7.8	4.8	5.2	5.5
Flexural Strength- Mpa	70	96	54	50	84
Compressive Strength- Mpa	120	185	90	130	208
Youngs Modulus - Gpa	20	11	11	14	13
Shore Hardness	60	94	55	65	85
Resistivity- uOhm cm	1300	2000	900	1200	1550
Max operating temp- in air	800 deg C	600 deg C	600 deg C	600 deg C	600 deg C