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 very high modulus of elasticity in tension and high tensile strength up to 175??(347??. Classification: G 90@000 psi (621 MPa) tensile strength@ 40@000@000 psi (276 GPa) tensile modulus carbon fiber impregnated with epoxy resin for service up to 175??(347??.