MC320LE Phenolic Composite Sheet – Superior Strength & Low Moisture Absorption

Grade MC320LE is a fine weave bleached cotton phenolic composite that has excellent machining characteristics and low moisture absorption. MC320LE meets or exceeds the requirements of MIL-I-24768/13.

Properties

General

Property	Value	Testing Standard	Comment
Bonding strength	771 Kg	ASTM D229	Condition A
Density	1.38 g/cm³	ASTM D792
Moisture absorption	0.87 %	ASTM D570	Condition A

Mechanical

Property	Value	Testing Standard	Comment
Compressive strength	262 MPa	ASTM D695	Condition A \| Flatwise
Flexural strength	165.5 MPa	ASTM D790	Condition A
Hardness, Rockwell M	102 [-]	ASTM D785
Impact strength, Izod unnotched, ASTM	91 J/m		Condition E-48/50, Transverse
	107 J/m		Condition E-48/50
Shear strength	96.5 MPa	ASTM D732	Condition A, Transverse
Tensile strength	129.6 MPa	ASTM D638	Condition A

Thermal

Property	Value	Comment
Relative temperature index, electrical	115 °C	UL Bulletin 746b¹
Relative temperature index, mechanical strength	125 °C	UL Bulletin 746b¹
Arc resistance	130 seconds, ASTM D495, Condition A
Flammability	UL Bulletin 94, Class HB, Condition A

Electrical

Property	Value	Testing Standard	Frequency	Comment
Breakdown voltage	70 kV	ASTM D149		Condition A
Dielectric constant	5.3 [-]	ASTM D150	1MHz	Condition A
Dissipation factor	0.044 [-]	ASTM D150	1MHz	Condition A

Technological properties

Property
Application areas	Applications include marine applications, terminal boards and parts requiring medium strength and excellent electrical characteristics.
Fillers	Cotton Fabric
Other	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.
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, www.norplex-micarta.com, to determine if the information is the most current available.

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Composite material