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Technical Data Sheet 331 (previously TDS 272)
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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AFM 31 is an asbestos-free gasket material. It is composed of
aramide fibers and other asbestos substitutes which are resistant to high
temperatures. These substitutes are processed with high-grade elastomers under
elevated pressure and temperature.
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Properties
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AFM 31 is a highly conformable gasket material featuring high
compressibility and flexibility plus very good sealability against fluids and
gases.
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Application
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- for sealed joints on lightweight components where surface pressure is
relatively low, e.g. on valve covers, oil pans, covers, in IC
engines, compressors, pipelines, apparatus and transmissions.
- for sealing engine, transmission, hydraulic, and
refrigerating oils
- for sealing fuels, water, mixtures of water and antifreeze & corrosion
inhibitors.
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Surfaces
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As standard, both sides of AFM 31 are coated with a non-stick, high-friction layer that greatly facilitates disassembly.
In most cases, additional surface treatment is unnecessary.
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Technical Data
(nominal thickness
2.00 mm)
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Density
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g/cm³
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1.4 - 1.7
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Ignition loss acc. to DIN 52 911
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%
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< 45
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| Tensile strength |
acc. to ASTM F 152 across grain
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N/mm² |
> 8 |
acc. to DIN 52 910 across grain
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N/mm²
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> 6
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| Residual stress acc. to DIN 52 913 |
16 h, 175 °C
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N/mm²
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≈ 24
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Compressibility and recovery
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| acc. to ASTM F 36, procedure J |
| compressibility |
% |
14 - 23 |
recovery
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%
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> 50
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Sealability against nitrogen
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acc. to DIN 3535, part 6 FA
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mg/(s·m)
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< 0.01
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Swelling acc. to ASTM F 146
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in IRM 903 Oil (replaces ASTM Oil No. 3)
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| 5 h, 150 °C |
| increase in thickness |
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< 10 |
increase in weight
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%
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< 20
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| in ASTM Fuel B |
| 5 h, room temp. |
| increase in thickness |
% |
< 15 |
increase in weight
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%
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< 20
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in water / antifreeze (50:50)
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| 5 h, 100 °C |
| increase in thickness |
% |
< 5 |
increase in weight
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%
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< 15
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Maximum continuous temperature
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°C
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250
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Maximum operating pressure
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bar
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80
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DIN 28091-2:
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Cold creep εKSW
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%
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11 - 20
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Cold recovery εKRW
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%
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6 - 11
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Hot creep during service εWSW/T
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%
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60 - 70
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Hot recovery εWRW/T
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%
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≈ 0.8
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Recovery R
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mm
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≈ 0.015
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Specific leakage rate λ
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mg/(s·m)
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< 0.025
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Residual surface pressure
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%
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> 50 |
after 1000 h (in air at 100 °C)
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Sealing parameters, see corresponding Table
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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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| Gaskets |
according to a drawing, dimensions supplied, or other arrangement.
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| Sheets |
1500 x 1500 mm (standard size) |
Nominal thicknesses and tolerances acc. to DIN 28091-1 (mm)
Dimensional limits within a shipment
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0.30
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±0.10
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0.50
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±0.10
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0.75
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±0.10
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1.00
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±0.10
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1.50
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±0.15
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2.00
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±0.20
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Max. thickness variation in a sheet:
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| 0.1 mm for sheet thickness ≤1.00 mm, and 0.2 mm for thickness >1.00 mm |
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Sheet as a PDF document 
