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Graphite/Metal Laminates
Technical Data Sheet 141 (previously TDS 641)
Edition: 08/2015, supersedes all prior editions.
Please see the
latest issue at www.reinz-industrial.com |
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Material
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CHEMOTHERM is the designation for asbestos-free materials made of expanded graphite and various metal cores. |
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Designation |
Core type |
Core material |
Thickness |
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CHEMOTHERM SP |
tanged core |
galvanized steel |
0.2/0.25 mm |
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CHEMOTHERM SPE |
tanged core |
1.4401 |
0.1 mm |
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Properties
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CHEMOTHERM is characterized by
exceptionally good chemical and thermal resistance, high
compressibility, i.e. good conformability to irregular and rough
sealing faces, low creep, good gas sealability, and consistent material
properties even under alternating operating conditions. The tanged
core guarantees excellent resistance against blow-out at high
pressures.
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Application
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CHEMOTHERM SP is used to
seal cylinder heads and exhaust systems of IC engines
and wherever high, alternating thermal and mechanical stress is
encountered and where the medium to be sealed allows the use of a
zinc-galvanized steel core. This version is also a very
economical alternative to CHEMOTHERM SPE.
Thanks to its stainless steel core, CHEMOTHERM SPE covers the same application range of CHEMOTHERM SP. However, the material is also used primarily to seal aggressive media in pipelines and apparatus construction.
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Approvals
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CHEMOTHERM SPE: |
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DIN-DVGW |
In accordance with DIN 3535, Part 6
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BAM |
German Federal Institute for Materials Research and Testing. Gaskets for flanged
joints of copper, copper alloys, and steel. Gaseous oxygen up to 130 bar
and 200 °C. Liquid oxygen. |
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UVV 61* |
"Gases", AD-B7 (VdTÜV) |
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Germanischer
Lloyd (DNV GL)
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Approval for shipbuilding
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CHEMOTHERM SP: |
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UVV 61* |
"Gases", AD-B7 (VdTÜV) |
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* Blow-out resistance in combination with inner metal bead. |
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Technical Data
CHEMOTHERM SP
(nominal thickness
2.0 mm)
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Purity of graphite layer |
ash content |
% |
< 4 |
chloride content |
ppm |
< 50
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Initial density |
of graphite layer |
g/cm³ |
1.0 - 1.1 |
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Residual stress acc. to DIN 52 913 |
16 h, 300 °C |
N/mm² |
> 45 |
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Compressibility and recovery
acc. to ASTM F 36, procedure J |
compressibility |
% |
15 - 25 |
recovery |
% |
> 20 |
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Sealability against nitrogen |
acc. to DIN 3535, part 6 (FA) |
mg/(s·m) |
< 0.1 |
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Swelling acc. to ASTM F 146: |
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in IRM 903 Oil (replaces ASTM Oil No. 3)
5 h, 150 °C |
increase in thickness |
% |
< 5 |
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in ASTM Fuel B
5 h, room temp. |
increase in thickness |
% |
< 10
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Operating temperature |
in inert or reducing
atmosphere |
up to the operating limits of the core material used |
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in air |
°C |
-200 up to +450
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Operating pressure (max.)
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at 450 °C
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bar |
100 |
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The data quoted above are valid for the material "as delivered" without
any additional treatment. In view of the countless possible
installation and operating conditions, definitive conclusions cannot be
drawn for all applications regarding the behaviour in a sealed joint.
Therefore, we do not give any warranty for technical data, as they do
not represent assured characteristics. If you have any doubt, please
contact us and specify the exact operating conditions.
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Technical Data
CHEMOTHERM SPE
(nominal thickness
2.0 mm)
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Purity of graphite layer |
ash content |
% |
< 2 |
chloride content |
ppm |
< 50
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Initial density |
of graphite layer |
g/cm³ |
1.0 |
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Residual stress acc. to DIN 52 913 |
16 h, 300 °C |
N/mm² |
> 48 |
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Compressibility and recovery
acc. to ASTM F 36, procedure J |
compressibility |
% |
30 - 45 |
recovery |
% |
10 - 20 |
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Sealability against nitrogen |
acc. to DIN 3535, part 6 (FA) |
mg/(s·m) |
< 0.08 |
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Swelling acc. to ASTM F 146: |
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in IRM 903 Oil (replaces ASTM Oil No. 3)
5 h, 150 °C |
increase in thickness |
% |
< 5 |
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in ASTM Fuel B
5 h, room temp. |
increase in thickness |
% |
< 10
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Operating temperature |
in inert or reducing
atmosphere |
up to the operating limits of the core material used |
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in air
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°C |
-200 up to +450
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Operating pressure (max.)
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at 450 °C |
bar |
100 |
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Sealing parameters see corresponding Tables
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The data quoted above are valid for the material "as delivered" without
any additional treatment. In view of the countless possible
installation and operating conditions, definitive conclusions cannot be
drawn for all applications regarding the behaviour in a sealed joint.
Therefore, we do not give any warranty for technical data, as they do
not represent assured characteristics. If you have any doubt, please
contact us and specify the exact operating conditions.
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Form of delivery
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CHEMOTHERM SP, CHEMOTHERM SPE
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Gaskets
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according to a drawing, dimensions supplied, or other arrangements |
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Rolls |
up to 500 mm wide |
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Nominal thicknesses |
1.0 mm/1.5 mm/2.0 mm, other thicknesses by agreement. |
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Tolerances according to DIN 28 091-1 |
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