Sigraflex


*Rolls*	*Sheets*	Tape	*Gaskets*
SGL POLYCARBON manufactures flexible graphite foil in various forms for industrial applications: producing laminated homogeneous sheets, rolls, tapes and gaskets reinforced with stainless steel or other material inserts. Our SIGRAFLEX® brand is known world-wide.

Technical Advisory M&Y Factors

Technical Advisory Understanding Oxidation

Product Code Guide

Homogeneous Sheets and Rolls

SIGRAFLEX^® Grade B

Standard Industrial Grade flexible graphite foil with 98.0% minimum carbon content. No binders, fillers or resins. For use as spiral wound gasket filler and in die-formed rings.

SIGRAFLEX^® Grade S

Premium Grade flexible graphite foil with 99.0% minimum carbon content. No binders, fillers or resins.

SIGRAFLEX^® Grade N

High Purity Nuclear Grade flexible graphite foil with 99.5% minimum carbon content. Can be certified to meet NEDC-31735P/D5OYP12 specifications. No binders, fillers or resins.

SIGRAFLEX^® Grade BP

Standard Industrial Grade flexible graphite foil with an inorganic, non-metallic passivating inhibitor for oxidation and corrosion resistance.

SIGRAFLEX^® Grade SP

Premium Grade flexible graphite foil with an inorganic, non-metallic passivating inhibitor for oxidation and corrosion resistance.

SIGRAFLEX^® Grade NP

High Purity Nuclear Grade flexible graphite foil with an inorganic, non-metallic passivating inhibitor for oxidation and corrosion resistance. Can be certified to meet GE-NEDC-31735P/ D5OYP12 specifications

Homogeneous Tapes
B Tape	Slit, plain or corrugated, with or without pressure sensitive adhesive (PSA), from Standard Industrial Grade B.
S Tape	Slit, plain or corrugated, with or without pressure sensitive adhesive (PSA), from Premium Grade S.
N Tape	Slit, plain or corrugated, with or without pressure sensitive adhesive (PSA), from Premium Grade N.
SP Tape	Slit, plain or corrugated, with or without pressure sensitive adhesive (PSA), from Grade SP.
BP Tape	Slit, plain or corrugated, with or without pressure sensitive adhesive (PSA), from Grade BP.

Reinforced Laminates
B-LAM Grade		Laminated sheets, .030-.180" thick, adhesive bond, no insert.
BTCSS Grade		316 stainless steel tang inserted laminate. Standard Industrial Grade B sheets mechanically bonded to tang sheet insert (0.004"), no adhesive.
BSSC Grade		A laminate with flat 316 stainless steel insert, (0.002") made from Standard Industrial Grade B sheet, adhesive bond.
BSC Grade		A laminate with 316 stainless steel wire mesh screen insert (24 wire/in.,0.0075" thick) made from Standard Industrial Grade B sheet, adhesive bond.
BHST Grade		A laminate with either 0.002" or 0.003" Hastelloy C-276 made from Standard Industrial Grade B sheet, adhesive bond, (24"x24"only).
BHSTT Grade		Hastelloy C-276 tang inserted laminate. Standard Industrial Grade B sheets mechanically bonded to 0.004" tang sheet insert, (24"x24"only).
BMY Grade		Standard Grade B sheets adhesively bonded to a flat 0.0005" (standard) thick polyester insert. (also 0.002" available). Recommended for applications below 400°F.
Hochdruck HD		A multi-layer, adhesive-free laminate with high integrity 316 stainless steel foil reinforcement for extreme applications.
Hochdruck RS		A high purity, multi-layer, adhesive-free laminate with low sulfur content. Can be certified to meet GE-NEDC 31735P/D5OYP12.
BGFC Grade		A laminate with 0.0025" high temperature cloth/fabric reinforcement made with Standard Industrial Grade sheets.

PERFORMANCE ADVANTAGES

	Non-toxic
	Excellent thermal stability
	Highly anisotropic
	Very low thermal expansion characteristics
	Low electrical resistivity
	Low coefficient of friction
	High thermal conductivity
	Low modulus of elasticity, highly flexible
	Easy conformability to surface irregularities
	Non-abrasive
	Low gas permeability
	Nuclear certifiable, high purity
	Chemically inert

PRODUCT CHARACTERISTICS

^{Graphite Composition

Resistant to a wide range of temperatures, from -328°F / -200°C, to +5432°F / 3000*C, (in inert atmospheres).

Resistant to a wide range of pressure changes.

Resistant to fluids with pH range of 0-14, except strong oxidizers.

Excellent weather and aging characteristics.

Low creep relaxation.

Seals easily under moderate bolt loads.}

^{Inserts

Reduces gasket damage in handling and installation.

Extra strength when narrow cross section gasketing is required.

Useful for higher pressures.}

^{No Binders

Eliminates potential fluid contamination from binder residue.

No gaseous decomposition products.}

^{Variety of Densities and Sizes

Useful for a wide range of applications.}

^{Chemical Resistance

Chemically resistant to a wide variety of materials. Call for specific application or comprehensive resistance chart.}

TYPICAL PROPERTIES
Property	Units	Value
^{Bulk Density}	^{lb/ft³ (gm/cc)}	70.0 (1.1)
^{Thermal Conductivity "a" Direction (parallel to surface) "c" Direction (normal to surface)}	^{BTU-in/hr-ft² °F BTU-in/hr-ft² °F}	1532 48
^{Thermal Expansion 70-1800° (bulk density 1.7-1.9gm/cc)}	10ֿ6/ ^°F	2.8 - 4.4
^{Hardness (Shore Scleroscope) At 1.0 gm/cc At 1.3 gm/cc}	- -	30 40
^{Tensile Strength At 1.1 gm/cc and .015" foil}	^PSI	700 min.
^{Permeability Air}	cm²/gm	<0.00002
^{Emissivity At 932°F}	-	0.4
^{Sublimination Temperature (does not melt)}	°F	6600
^{Temperature Limit (in air)}	°F	1000
^Compression		40%
^Recovery		20%
^{Creep Relaxation}		<5%

SPECIFICATIONS
Temperature, min.	-328°F/-200°C
Temperature, max. In air: In steam: In reducing atmosphere:	+850°F/+450°C +1200°F/+650°C +5432°F/+3000°C
Pressure, max.	5,000 - 10,000 psi
P x T, max.	2,000,000
M-factor, stress	2
Y-factor, psi	1000
Maximum Stress	25,000 psi
pH Range	0-14 (few exceptions)
Standard Sheet Thicknesses**	1/32", 1/16", 1/8" (030", 060", 120")
Standard Sizes** Rolls: Sheets:	20, 30, 40, 60" x 108' 20, 30, 40, 60" x 216' Homogeneous and Laminated 40" x 40", 60" x 60"
Densities**	0.7 to 1.4 gm/cc

Product Code Guide

Homogeneous Sheets and Rolls

Homogeneous Tapes

Reinforced Laminates

PRODUCT CHARACTERISTICS

TYPICAL PROPERTIES

SPECIFICATIONS