Home Products Beryllium Products Beryllium Metal I-220-H I-220-H GRADE BERYLLIUM I-220H grade beryllium is a hot isostatically pressed beryllium consisting of a minimum of 98% beryllium. I-220H offers the best combination of high tensile strength and micro-yield strength of any grade of beryllium. Typical micro-yield strength of I-220H grade beryllium is 8 ksi. HIGH TENSILE STRENGTH ADVANTAGE I-220H beryllium is ideal for structural, instrumental and optical applications and those requiring high resistance to plastic deformation at low stress levels. Typical uses include telescope supports on space exploration satellites and optics. TENSILE PROPERTIES Minimum tensile properties for the material at room temperature (as determined by testing complaint to ASTM E-8): Ultimate Tensile Strength, psi, minimum 65.0 Yield Strength (0.2% offset), psi, minimum 50.0 Elongation (% in 4 diameters), minimum 2.0 Elongation (% in 4 diameters), minimum** 1.0 Micro-yield Strength, ksi, minimum Grade 1 6.0 Micro-yield Strength, ksi, minimum Grade 2 8.0 **Use when material consists of blanks with either: A calculated volume greater than 1500 cubic inches (0.0246 m3) A major dimension greater than 20 inches (0.787m). AVAILABLE DESIGN CONSIDERATIONS Available in rod or bar cut from block. Special sizes and shapes can be made.