查看样本合金摘要数据表（PDF）自1952年以来，合金摘要一直是世界各地使用的金属和合金材料性能数据的主要参考。以图表、图表和表格为特色，这些表格给出了有关成分或特性、物理和机械性能、热处理和可加工性的事实和数字。BRUSH WELLMAN I-220是一种仪器级铍，通过最大2.2%氧化铍的分散强化。其最小微屈服强度为5000 psi。I-220B由冲击研磨粉制成，因此比BRUSH WELLMAN S-200E更各向同性。I-220因其高度的各向同性和良好的微屈服强度，常被用作光学支撑台。

View Sample Alloy Digest Data Sheet (PDF)Since 1952, Alloy Digest has been the leading reference for materials property data on metals and alloys used throughout the world. Featuring graphs, charts and tables, these sheets give facts and figures on composition or characterization, physical and mechanical properties, heat treatment, and machinability.BRUSH WELLMAN I-220 is an instrument grade of beryllium strengthened by a dispersion of 2.2% beryllium oxide maximum. It has a micro-yield strength of 5000 psi minimum. I-220B is manufactured from impact ground powder and therefore is more isotropic than BRUSH WELLMAN S-200E. I-220 is often used as an optical support bench because of its high degree of isotropy and good micro-yield strength.