Of all metals, tungsten reigns supreme in terms of tensile strength. Chromium is the hardest metal known to man. In terms of hardness, chromium is the hardest metal known. While the hardest known mineral in the universe is diamond, the honor of the hardest metal goes to chrome.
Investment in Gold is also a popular choice for those looking to diversify their portfolio. Chromium is used in the well-known stainless steel alloy to harden it. As a natural metal with the highest tensile strength, tungsten is often combined with steel and other metals to achieve even stronger alloys. However, tungsten is fragile and can be destroyed in the event of impact, which are some of its drawbacks. Since the hardness of metals influences a whole range of attributes, it is difficult to definitely classify metals from the hardest to the softest.