Home Products Beryllium Products Beryllium Metal S-200-F S-200-F GRADE BERYLLIUM S-200-F grade beryllium is a vacuum hot pressed grade of beryllium consisting of a minimum of 98.5% beryllium. S-200-F is used as an optical substrate and support bench in: Numerous astronomical telescopes In fire control and FLIR systems In spacecraft and weather satellites in nuclear applications that do not require the higher purity of S-65. S-200-F is commonly certified to the Materion specification S-200-F. It can also be certified to the industry specification AMS7906 prepared by SAE Aerospace. TENSILE PROPERTIES Minimum tensile properties for the material at room temperature (testing compliant to ASTM E-8) Ultimate Tensile Strength, ksi, min 47.0 (324 MPa) Yield Strength (0.2% offset), ksi, min 35.0 (242 MPa) Elongation (% in 4 diameters), min 2.0 AVAILABLE DESIGN CONFIGURATIONS Available in rod or bar cut. Several size pressings can be made.