system
Given the following post, respond as if you're commenting on Reddit:
human
Is it possible to still manufacture "low-background" steel as used for science?

from the TIL today. I know that steel manufactured before 1940 is especially rare and expensive due to contamination from the atomic testing. 
but some day that may/will run out could an alternative still be manufactured ?
gpt
Yes but its an expensive and complex process. Most low background steel it taken from pre-nuclear age, submerged shipwrecks. IIRC quite a lot of l-b steel used by nasa for a lot of their equipment came from the sunken German ww1 battlefleet that was captured and interred at scapa-flow in Scotland.