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Flexible Graphite Sheet & Gasket Materials

LAMINATED FLEXIBLE GRAPHITE SHEET

ASTM F104: F517000B1M3
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application:

Durlon® Flexible Graphite is unaffected by heat over a wide range of temperatures. It exhibits low electrical resistivity and high thermal conductivity and is suitable for cryogenic temperatures. This product is suitable for applications in the automotive, refining and petrochemical plant processes.

composition:

Durlon® Flexible Graphite is available in several styles. These include homogeneous sheet and laminated styles with various types of core materials.

available styles:

  • FGS95 Standard industrial grade sheet containing no binders or resins. Used in industrial applications such as oil refineries, power plants and chemical process plants.
  • FGL316 Standard industrial grade sheet laminated with an adhesive bond on both sides of a .002" thick 316 stainless steel foil insert. Used where high performance and handleability are important.
  • FGT316 Standard industrial grade sheet mechanically bonded on both sides of a .004" thick 316 stainless steel metal tang core. Used where stresses and pressures are high and improved handleability is important.
  • FGM316 Inhibited flexible graphite sheet adhesively bonded to multiple layers of .004" thick 316 stainless steel foil. Used where stresses and pressures are high and improved handle-ability is important. Fire safe.

typical physical properties (based on 1/16" thickness):

Test Method FGS95 FGL316 FGT316 FGM316

Temperature

Min
Max, In air
Max, In Steam

 

-450ºF (-260°C)
850ºF (454°C)
1200ºF (650°C)

 

-450ºF (-260°C)
850ºF (454°C)
1200ºF (650°C)

 

-450ºF (-260°C)
850ºF (454°C)
1200ºF (650°C)

 

-450ºF (-260°C)
1022ºF (550°C)
1200ºF (650°C)

Carbon Content % ≥98 ≥98 ≥98 ≥99
Graphite Grade Standard Standard Standard Super Inhibited
Pressure Max: psi (bar) 3000 (207) 3000 (207) 3000 (207) 3625 (250)
ASTM F36
Compressibility, %
Recovery, %

35-40
20

35-40
18

30-35
20

30-40
10-15
ASTM F38
Creep Relaxation,%

5

5

5

5
Ignition Loss, %
@ 850°F (454°C)
@1200°F (650°C)

1
8

1
6

1
6

1

6
ASTM F2378 - Gas Permeability
Nitrogen, cc/min

0.40

0.40

0.80

0.40
ASTM F104 & F868
Line Call-Outs
F104
F517000B1M3
F868
9FMF2
F868
9FMF1
F868
9FMF2

This is a general guide only and should not be the sole means of accepting or rejecting this material. The data listed here falls within the normal range of product properties but should not be used to establish specification limits nor used alone as the basis of design.

M&Y AND PROPOSED ASTM GASKET CONSTANTS:

Material FGS95 FGL316 FGT316 FGM316
M
Y psi







2.5
4000
Gasket Constants
Gb psi 
a
Gs psi 

970
0.038
1

816
0.38
1

1400
0.33
1
 
*Gasket Constants based on proposed ASTM Draft 10.1 and 1/16" thickness

_____________________________________________________________________________________________________

Warning: Durlon® gasket materials should never be recommended when both the temperature and the pressure are at the maximums listed. Properties and applications shown are typical. No application should be undertaken by anyone without independent study and evaluation for suitability. Never use more than one gasket in one flange joint, and never reuse a gasket. Improper use or gasket selection could cause property damage and/or serious personal injury. The data reported is a compilation of field testing, field service reports and/or in-house testing. While the utmost care has gone into publishing the information contained herein, we assume no responsibility for errors. The information and specifications contained in this website are subject to change without notice. This revision cancels and obsoletes all previous editions.