It is soft and ductile. It is commonly used in castings, dies, molds, machine frames, and pipes, etc. Properties of Grey Cast Iron; 1. It is gray in color. 2. It is soft compared to other Cast Irons and has good machinability. 3. It has high compressive strength. 4. It is poor in tensile strength and impact strength with almost no ductility.
Lithium (from Greek: λίθος, romanized: lithos, lit. 'stone') is a chemical element with the symbol Li and atomic number 3. It is a soft, silverywhite alkali standard conditions, it is the lightest metal and the lightest solid all alkali metals, lithium is highly reactive and flammable, and must be stored in mineral oil.