Which material has been the most successful so far in your search

Question: Which material has been the most successful so far in your search
- Keywords:
  material,
  success
Asked by Pheonix to Cathal on 7 Mar 2017.
- Cathal Ó Murchú answered on 7 Mar 2017:
  
  There’s a lot of things to consider, such as how expensive it is to make and how easy it is to weld. So you might find a great material but it is too expensive to make. So far there is a steel developed in Japan that looks very promising so far.

Question: Which material has been the most successful so far in your search