Questions about Thermoset Composites?

Please note: all of our materials are custom developed to meet your specific requirements, if you don't see a product performance metric that meets your needs, call us to discuss your specific project requirements at 317.773.1766 or email us at

Ultrium - Carbon Fiber Composites

Structural Thermoset Composites
STC® - Ultra Performance Moldable Composites - Sheet Form

Product: Ultrium™ 4660 EMC
Resin system: Fast cure epoxy
Reinforcement: Carbon fiber


Test Method


Flexural Strength

ASTM D-790

609 MPa

Flexural Modulus

ASTM D-790

36 GPa

Tensile Strength

ASTM D-638

301 MPa

Tensile Modulus

ASTM D-638

38 GPa

Specific Gravity

ASTM D-792


Reinforcement Content WT%


Reinforcement Length


T(g) Tan Delta


Click to download a pdf of the STC 4660 Data Sheet

The information on this sheet is a guide. The stated values reflect an average of several tests conducted on Composites Internatioanl's (CI's) goods. These values were obtained under ideal conditions and may not be replicated in any particular test, part, or application. Because the values achieved in actual parts depend considerably on part design, molding conditions, and testing methods, no guarantee is made or implied regarding values to be obtained in any specific test, part, or application. CI makes no warranty or representation as to the suitability of any of its goods for use in any application. CI relies on customer to conduct its own tests and judge for itself the suitability of CI's goods.