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Hi all I was trying to do a spark test but got pretty similar results and was hoping I could get some help from the masters in the forum... So I found what I believe to be a piec of spring steel from a truck's suspension in the highway and brought it back to the shop and performed a spark test on it only to be more confused it. I've attached a video where you can see me performing the test. The first is 5160 steel The second is the steel I found on the highway The third is a piece of rebar. I would love to read your comments. Thanks! 20191207_130917.mp4