|
|
|
|
Technical Data Sheet 338 (previously TDS 278)
Edition: 08/2015, supersedes all prior editions.
Please see the latest issue at www.reinz-industrial.com |
|
|
Material
|
AFM 38 is an asbestos-free gasket material. It consists of
aramide fibers and other asbestos substitutes that are resistant to high
temperatures and are processed with high-grade elastomers under
elevated pressure and temperature.
|
|
Properties
|
AFM 38 is the most economical gasket material in the AFM range.
The material which is resistant to oils and solvents is characterized by its
very high compressibility and flexibility as well as outstanding gas
sealability. AFM 38 ensures very effective sealing even under low surface
pressure.
|
|
Application
|
- for sealed joints that are subjected to low mechanical and thermal stress
- for sealing lightweight components with comparatively low surface pressure, e.g. valve covers, oil pans and covers in IC engines
- for transmissions, pumps, apparatus, and pipelines in the fittings and sanitary
fields.
- for sealing engine, transmission, hydraulic and refrigerating oils, fuels, and
solvents
- for sealing water as well as mixtures of water and antifreeze & corrosion
inhibitors
|
|
Surfaces
|
As standard, both sides of AFM 38 are coated with a non-stick, high-friction layer that greatly facilitates disassembly.
In most cases, additional surface treatment is unnecessary.
|
|
Approvals
|
Germanischer Lloyd (DNV GL)
Approval for shipbuilding
|
|
Technical Data
(nominal thickness
2.00 mm)
|
Density
|
g/cm³ |
1.5 - 1.7 |
Ignition loss acc to DIN 52 911
|
% |
< 45 |
Tensile strength
|
acc. to ASTM F 152 accross grain
|
N/mm² |
> 7 |
acc. to DIN 52 910 accross grain
|
N/mm² |
> 5 |
Residual stress acc. to DIN 52 913
|
| 16 h, 175 °C |
N/mm² |
≈ 20 |
Compressibility and recovery
|
acc. to ASTM F
36, procedure J
|
compressibility
|
% |
15 - 25 |
recovery
|
% |
> 60 |
Sealability against nitrogen
|
acc. to DIN 3535, part 6 FA
|
mg/(s·m) |
< 0.01 |
Swelling acc. to ASTM F 146
|
in IRM 903 Oil (replaces ASTM Oil No. 3)
|
| 5 h,
150 °C |
increase
in thickness
|
% |
< 10 |
increase in weight
|
% |
< 20 |
in ASTM Fuel B |
5 h, room temp.
|
increase in thickness
|
% |
< 15 |
increase in weight
|
% |
< 15 |
in water / antifreeze (50:50) |
| 5 h,
100 °C |
increase
in thickness
|
% |
< 5 |
increase in weight
|
% |
< 10 |
Short-term peak temperature
|
°C |
300 |
Maximum continuous temperature
|
°C |
200 |
Maximum operating pressure
|
bar |
50
|
| |
|
|
|
|
|
| DIN 28091-2: |
| |
| Cold creep εKSW |
% |
15 - 25 |
| |
| Cold recovery εKRW |
% |
8 - 13 |
| |
| Hot creep during service εWSW/T |
% |
60 - 70 |
| |
| Hot recovery εWRW/T |
% |
≈ 0,8 |
| |
| Recovery R |
mm |
≈ 0.015 |
| |
| Specific leakage rate λ |
mg/(s·m) |
< 0.1 |
| |
| Residual surface pressure |
% |
> 50 |
| after 1000 h (in air at 100 °C) |
| |
| Sealing parameters see corresponding Table. |
|
|
|
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.
|
|
Form of delivery
|
| Gaskets |
according to a drawing, dimensions supplied, or other arrangement.
|
| Sheets |
1500 x 1500 mm (standard size) |
Nominal thicknesses and tolerances acc. to DIN 28091-1 (mm)
Dimensional limits within a shipment
|
0.30
|
±0.10
|
0.50
|
±0.10
|
0.75
|
±0.10
|
1.00
|
±0.10
|
1.50
|
±0.15
|
2.00
|
±0.20
|
3.00
|
±0.30
|
|
Max. thickness variation in a sheet:
|
| 0.1 mm for sheet thickness ≤1.00 mm, and 0.2 mm for thickness >1.00 mm |
|
|
|
|
|
Sheet as a PDF document 
