When I first began covering metalcasting in 2005, I was fascinated with the wide range and variety of properties that different metals and their alloys exhibit, even within the same alloy family. Electrical conductivity, density, ductility, hardness, corrosion resistance, and thermal conductivity are all among the properties that metals exhibit in varying degrees. You get the feeling that almost any application’s needs from a material could be met by some sort of alloyed metal if given an infinite amount of time and elements to experiment. 

While there is no magic workshop where researchers are studying all things metal for all eternity, thankfully many labs and institutions are developing new alloys with fine-tuned properties to meet customer need. Others have set about to prove and quantify known or suspected characteristics.

As early as 2400 BC, ancient Egyptian texts have referenced using copper for sterilization and to treat wounds. Now in the 2000 ADs, scientists have proven copper’s antimicrobial properties, and work on this incredible material continues. Initial studies first sought to prove pure copper’s antimicrobial properties, but now researchers are working to expand that to discover which copper alloys also have significant ability to inhibit bacteria growth. More on this work is on page 22 of this issue. This research could have a significant impact on public health if it leads to the increased use of copper products in high-touch areas.

The studies on antimicrobial copper is a fraction of the research and development conducted on metal alloys all over the world. Metallurgists are constantly seeking how to achieve certain recipes of properties that will meet specific demands. This is critical to help industry continue to evolve. 

Patricio Gil, CEO of MAPPSA, stated in his Cast Iron Honorary Lecture last year, “In the end, the market is open for new developments and ways to offer better products. Customers are not buying chemical elements or alloys, they are buying mechanical properties.”

The possibilities for materials continue to expand to meet needs. Have a discussion with your casting supplier if your needs have changed or will be changing, and they might already have an answer for you.    CS