NeoGraf GRAFCELL® FFP-300 SERIES Flow Field Plate Graphite

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NeoGraf GRAFCELL® FFP-300 SERIES Flow Field Plate Graphite
Categories:	Carbon; Graphite
Material Notes:	Manufactured from expanded natural graphite, GRAFCELL® Flow Field Plate (FFP) components retain a continuous graphitic phase. This phase continuity, combined with a low contact resistance, provides electrical and thermal properties in comparison to both synthetic graphite composite and metallic fuel cell components. The thermal diffusivity of GRAFCELL® FFP SERIES products is 8-12 times higher than composite materials and 33 times higher than stainless steel. GRAFCELL® FFP SERIES products have played a critical role in improving fuel cell power density and performance for over 10 years. With over two million kilometers of road experience in car and bus applications annually, GRAFCELL® FFP SERIES continuous phase flow field plates have replaced synthetic graphite as the premier material for PEM fuel cells. Formerly a product of GrafTech.
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Physical Properties	Metric	English	Comments

Density	1.50 g/cc	0.0542 lb/in³
Permeability	<= 1.0	<= 1.0	cc/min (1 atm, 15 psi limit)
Thickness	>= 300 microns	>= 11.8 mil	Minimum Web
	>= 3000 microns	>= 118 mil	plus or minus 100 microns

Mechanical Properties	Metric	English	Comments
Tensile Strength at Break	30.0 - 50.0 MPa	4350 - 7250 psi
Flexural Strength	50.0 - 70.0 MPa	7250 - 10200 psi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.000700 ohm-cm	0.000700 ohm-cm	(x-y); ASTM-C611 (4-Point Resistivity Test)
	0.0300 ohm-cm	0.0300 ohm-cm	(z); ASTM-C611 (4-Point Resistivity Test)

Thermal Properties	Metric	English	Comments
CTE, linear	1.00 - 5.00 µm/m-°C	0.556 - 2.78 µin/in-°F	(x-y)
	10.0 µm/m-°C	5.56 µin/in-°F	(z)
Thermal Conductivity	5.00 W/m-K	34.7 BTU-in/hr-ft²-°F	(z)
	275 W/m-K	1910 BTU-in/hr-ft²-°F	(x-y)
Glass Transition Temp, Tg	125 °C	257 °F

Descriptive Properties
Contact Resistance (µOcm²)	8
Thermal Diffusivity (cm²/sec)	1.2

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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CGRAF924 / 107328

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