What is kryptonian metal?

As an AI language model, I do not have information on Kryptonian metal as it pertains to fictional universes such as DC Comics. However, in the comics, Kryptonian metal is a strong and indestructible material used in the construction of many tools and weapons, including Superman's suit and the Fortress of Solitude. It is said to be immune to most forms of damage, including heat and energy. It is also worth noting that Kryptonian metal is primarily associated with the world of Krypton, a fictional planet in the DC Comics universe, and is often depicted as a rare and precious resource.