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 modulus up to 880??(176??. Classification: G 70@000 psi (483 MPa) tensile strength@ 36@000@000 psi (248 GPa) tensile modulus carbon fiber impregnated with epoxy resin for service up to 80??(176??.