High porosity metallic materials are designed for special properties, which can be used in many industrial applications. The development of new porous structures is a challenge for materials scientists. This paper discusses general characteristics, structure, properties and some manufacturing practices of a class of relatively new metallic materials named gasars, ordered porosity materials, or lotus type porous materials. An overview of the metals and alloys used and mechanical properties studied is presented. Some relations between structure characteristics and mechanical properties are discussed. Basic relations between processing parameters and structure characteristics are analysed. Special attention is paid to the complex physical phenomena in ordered porosity structure formation. Conditions for production of high porosity ingot are discussed.
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