BS EN 4718. Aerospace series. Polyetheretherketone with 55 % continuous glass fibre by volume (PEEK-GF55) stock shape material. Material specification|Tear tests, Natural rubber, Air transport, Compression set, Air transport engineering, Elongation, Plastics, Mechanical properties of materials, Density, Synthetic rubber, Mixing, Qualification approval, Quality assurance systems, Corrosion tests, Approval testing, Quality assurance, Elastic constants, Volume, Tensile strength, Carbon fibres, Hardness testing, Non-metals