Method #1: Recover from Autosave. By default, Word auto-saves a document every 10 minutes (this can be decreased or increased, see below) that it will automatically recover if the document closed due to a malfunction. Word will not auto-save a file that has been closed willingly using the Word close button.
â¢ Is metal one of the hardest material in the world? Yes, they are but the hardest material in the world known to mankind is DIAMOND. â¢ What is the hardest metal? The hardest known metal alloy, and the hardest known metal in general, is a type of carbon steel, Alloy 1090. With a tensile strength of .84 GPa (122,000 psi) and a yield strength of .64 GPa. (67,000 psi), carbon steel is surpassed in hardness only by very hard nonmetals, such as ruby, diamond, or aggregated diamond nanorods.
As the hardest known naturally occurring substance when the scale was designed, diamonds are at the top of the scale. The hardness of a material is measured against the scale by finding the hardest material that the given material can scratch, and/or the softest material that can scratch the given material.