What is the Hardest Metal? (with pictures) - wisegeek.com
Feb 21, 2019· Chromium, which rates 8.5 on the Mohs scale, is also extremely hard, and is often added to alloy steels ... but it'd be so brittle that it'd have so few applications, whereas tungsten is both hard, dense and ductile. ... Super diamond has tiny bubbles in it which makes one crack only a small irritation and is extremely hard to destroy.
» Read More