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The low-background steel of the internet https://en.wikipedia.org/wiki/Low-background_steel https://en.wikipedia.org/wiki/Low-background_steel

• HelloUsername 11mo ago
  As mentioned half a year ago at https://news.ycombinator.com/item?id=44239481 https://news.ycombinator.com/item?id=44239481
  • thm 11mo ago
    As mentioned 7 months ago https://news.ycombinator.com/item?id=43811732 https://news.ycombinator.com/item?id=43811732
    • Ginger-Pickles 11mo ago
      As mentioned in this thread :P https://news.ycombinator.com/item?id=46103662 https://news.ycombinator.com/item?id=46103662