Form: This specification covers one type of epoxy-resin-impregnated carbon fibers in the form of tape and sheet. Application: Primarily for use in structural composites requiring high tensile strength up to 175?C (347?F). Classification: G 150@000 psi (1034 MPa) tensile strength@ 20@000@000 psi (138 GPa) tensile modulus carbon fiber impregnated with epoxy resin for service up to 175?C (347?F).