Phenolic RTB324FR - Tube

Alternative and trade names
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Grade RTB324FR is constructed of a fine weave cotton fabric which has been bleached to remove impurities, and a modified phenolic resin with powdered PTFE added for lubrication as well as a flame retardant added. It has low moisture absorption and excellent dimensional stability and chemical resistance.

This material data has been provided by Norplex Micarta.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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23.0 °C

1.34 g/cm³

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Moisture absorption

23.0 °C

0.82 %

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ASTM D570, Condition Dᵢ-24/23



Compressive modulus

23.0 °C

2.37 MPa

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ASTM D695, Condition A

Compressive strength

23.0 °C

180.64 MPa

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ASTM D695, Condition A

Elastic modulus

23.0 °C

3.44 GPa

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ASTM D638, Condition A

Hardness, Rockwell M

23.0 °C

100 [-]

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Tensile strength

23.0 °C

60.67 MPa

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ASTM D638, Condition A



Relative temperature index, mechanical strength

140 °C

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UL Bulletin 94, Class HB, Condition A



Dielectric strength

23.0 °C

7.48 kV/mm

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ASTM D149, Condition A

Technological properties

Application areas

Typical uses include bearing retainers and parts that require excellent machining characteristics.


Cotton Fabric and PTFE


1.This temperature is a recommendation only, and based upon experience in various applications. The maximum operating temperature is dependent upon the application and should be investigated prior to use

2.The mechanical properties are converted from American unit system to International unit system.

Supplier Disclaimer

This data, while believed to be accurate and based on reliable analytical methods, is for informational purposes only. The terms and conditions of the agreement under which it is sold will govern any sales of this product. Data supplied above are "typical values"; not to be considered "specification values".

To assure the material's performance is adequate for a specific application; customers should verify, independent of Norplex-Micarta, performance characteristics of interest.

It is the responsibility of the users of this information to make sure that they have the latest version of this TDB, and are urged to check with Customer Service or, preferably our web site,, to determine if the information is the most current available.