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GrafTech GRAFOIL® GTB Standard Fluid Sealing Graphite Single Layer Gasketing Material

Category Carbon , Graphite
Manufacturer GrafTech International
Trade Name GRAFOIL®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF GrafTech GRAFOIL® GTB Standard Fluid Sealing Graphite Single Layer Gasketing Material.pdf
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Material Notes:
GRAFOIL® GTB flexible graphite sheet is a gasketing material containing no binders or fillers. Standard industrial grade GTB flexible graphite has an oxidation/corrosion inhibitor and is typically 98% graphite. Grade GTB is the facing material for grades GHR, GHE, GHP, and GHW laminates. GTB is used in most standard industrial fluid sealing applications, including: chemical, petrochemical, refinery, and steam service. While maintaining an effective seal, GRAFOIL® material exhibits virtually no creep relaxation. As a result, the need for periodic bolt tightening is greatly reduced.
Physical Properties Metric English Comments
Bulk Density 1.00 g/cc
0.0361 lb/in³
Standard for 0.020", 0.040" 0.060" thick
1.12 g/cc
0.0405 lb/in³
Standard for 0.005", 0.010", 0.015", 0.020", 0.025", 0.030", 0.060" thick
Thickness 130 microns
5.12 mil
Standard
250 microns
9.84 mil
Standard
380 microns
15.0 mil
Standard
510 microns
20.1 mil
Standard
640 microns
25.2 mil
Standard
760 microns
29.9 mil
Standard
1020 microns
40.2 mil
Standard
1520 microns
59.8 mil
Standard
Ash 1.8 %
1.8 %
Mechanical Properties Metric English Comments
Tensile Strength at Break 4.48 MPa
650 psi
Typical for 70 lb/ft³
Compression Set 85 %

@Pressure 34.5 MPa
85 %

@Pressure 5000 psi
Typical for 70 lb/ft³
Thermal Properties Metric English Comments
Maximum Service Temperature, Air 525 °C
977 °F
Minimum Service Temperature, Air -240 °C
-400 °F
Component Elements Properties Metric English Comments
Carbon, C 98.2 %
98.2 %
Sulfur, S 0.055 %
0.055 %
Chemical Properties Metric English Comments
Ionic Impurities - Cl (Chloride) 10 ppm
10 ppm
Leachable
Descriptive Properties Value Comments
Compressibility (%) 43
at 5000 psi load; Typical for 70 lb/ft³
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