• davetortoise@reddthat.com
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    15 days ago

    Much too large to be grain boundaries - if you had steel with grains this large you’d be able to pull it apart with your bare hands

    • evasive_chimpanzee@lemmy.world
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      15 days ago

      Yeah, thats why I specified it was just in the coating. Like the spangle in galvanized metal where you see grains with the naked eye.