AFM 26
Technical Data Sheet 126 (previously TDS 122)
Edition: 08/2015, supersedes all prior editions.
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 Sheet as a PDF document safe/print
Material
AFM 26 consists of a tanged and galvanized steel core. An asbestos-free soft material compound containing aramide fibers, inorganic fillers and high-grade binder elastomers is applied to both sides of the core.

Properties
In spite of the metal reinforcement that gives the material the required mechanical strength plus good stress resistance, AFM 26 exhibits excellent compressibility and recovery. Consequently, AFM 26 conforms very well to sealing surfaces, and compensates even major surface irregularities.

The moderately priced material is resistant to oils and fuels, etc. It is also suitable for sealing hot water and steam up to approx. 200 °C in stationary applications and with an installation surface pressure of at least 50 N/mm². In such cases, AFM 26 outperforms conventional fiber gaskets.
Compared with graphite gaskets, the material is easy to assemble and handle. Please consult us if you have a specific application.

Application
  • for sealed joints that are subjected to high mechanical stress, e.g. intake manifolds, cast iron oil pans, valve covers, transmission flanges and high-pressure pumps
  • for irregular sealing faces and/or lightweight components with low pressure and relatively high thermal stress
  • for sealing hot water and steam in pipeline flanges up to outer diameters of 500 mm.

Surfaces
For special applications, full-surface or partial coatings are available, e.g. a non-stick coating on a PTFE basis (also possible on materials in roll form) or a silicone-based coating that improves micro-sealing (only available as a finished gasket). Screen printing with various elastomers is also possible.

Technical Data
(nominal thickness
1.25 mm)
Weight per surface unit

kg/m²

3.50

Residual stress acc. to DIN 52 913
16 h, 300 °C N/mm² > 38
16 h, 175 °C

N/mm²

> 45

Compressibility and recovery
acc. to ASTM F 36, procedure J
compressibility % 9 - 17
recovery

%

> 55

Swelling acc. to ASTM F 146

in IRM 903 Oil (replaces ASTM Oil No. 3)
5 h, 150 °C
increase in thickness

%

< 10

in water / antifreeze (50:50)
5 h, 100 °C
increase in thickness

%

< 7

Short-term peak temperature

°C

400

Maximum continuous temperature °C 300
  for steam up to

°C

200

Operating pressure maximum

bar

250

Surface pressure

N/mm²


75

maximum at 300 °C

Max. continuous temperature and max. pressure must not occur simultaneously.

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.

Technical Data
(Nominal thickness
2.00 mm)
Weight per surface unit

kg/m²

5.4

Tensile strength acc. to DIN 52 910
with grain N/mm² ≈ 50
across grain

N/mm²

≈ 50

Residual stress acc. to DIN 52 913
16 h, 300 °C N/mm² > 35
16 h, 175 °C

N/mm²

> 40

Compressibility and recovery
acc. to ASTM F 36, procedure J
compressibility % 9 - 17
recovery

%

> 50

Swelling acc. to ASTM F 146

in IRM 903 Oil (replaces ASTM Oil No. 3)
5 h, 150 °C
increase in thickness

%

< 10

in water / antifreeze (50:50)
5 h, 100 °C
increase in thickness

%

< 7

Short-term peak temperature

°C

400

Maximum continuous temperature °C 275
  for steam up to

°C

200

Operating pressure maximum

bar

200

Surface pressure

N/mm²


60

maximum at 300 °C

Max. continuous temperature and max. pressure must not occur simultaneously.

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.

Rolls 500 mm wide
Other forms of delivery by arrangement
 
Nominal thickness

Tolerance (mm) Roll length (m)
0.75
±0.10
280
1.00
±0.10
210
1.25
±0.10
170
1.50
±0.10
140
2.00
±0.10
100
© VICTOR REINZ 2020