EN 2561 is a testing standard that determines the ultimate tensile strength, tensile modulus and, if required, the Poisson’s ratio and strain at failure in tension of carbon fiber reinforced plastics in the form of unidirectional laminates. This method is only applicable to specimens where the axis is parallel to the direction of the fibers; testing in the perpendicular is covered by the test methods in EN 2597. This standard is used by a range of manufacturers using carbon fiber laminates including those in the aerospace, automotive, wind energy, and construction industries. EN 2561 is typically used for materials development and qualification and quality control.