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Tyler Reinarts

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  1. Tyler Reinarts

    Question about phosphorus in historical iron

    Interesting... I wonder what the flaw in their theory was. Also would you say the ductility/toughness of room temp high P iron is comparable to unhardened high C steel? Sorry if I'm being tiresome, I'm just trying to get a good idea of what it would be like since I am not able to test it myself.
  2. Tyler Reinarts

    Question about phosphorus in historical iron

    Thanks for the info, but did you mean to say that high P iron etches dark? The other places I read says it etches bright.
  3. Tyler Reinarts

    Question about phosphorus in historical iron

    I was doing some research on the composition of historical blade materials and I found out that a lot of the iron they used contained a lot of phosphorus, between .4 and 1.4%. It also seems like they used it on purpose for pattern welding. Here's the links to some articles: https://www.tf.uni-kiel.de/matwis/amat/iss/kap_b/backbone/rb_3_4.html https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.uni-obuda.hu/journal/Thiele_Hosek_60.pdf&ved=2ahUKEwj3s6rbo43gAhUL54MKHVZ7AEUQFjARegQIBBAB&usg=AOvVaw1XYSF1k9B22QPbps6nWetn So my question is: wouldn't that much phosphorus make the metal extremely brittle? I've read that phosphorus increases hardness but reduces toughness/ductility but I don't know to what extent. I guess what I'm asking is how a high phosphorus (e.g. 1% )steel or iron would compare to other materials and if it's still strong enough to be useful to a blacksmith.