The addition of just three to six per cent rhenium makes materials stronger and more heat-resistant. 70 to 80 per cent of this technology metal is used for high-temperature or superalloys, which are in demand when extreme temperatures and high pressure prevail, such as in rocket and aircraft engines and gas turbines. Another major area of application is the oil refinery. Platinum-rhenium catalysts enable the economical production of unleaded petrol with a high octane rating. Heat also plays a role in most niche applications for rhenium, including electronic contacts, crucibles and heating elements.
