Quentin Posted December 16, 2008 Share Posted December 16, 2008 the other day me and john were in the shop and we were going to make some christmas presants (knifes). i had an old cultivator blade and was straightining it out and all of a sudded it cracks while it is red. just wondering if it is actually wrought and if so what can i do with it?...thanks, Quentin Quote Link to comment Share on other sites More sharing options...
dablacksmith Posted December 16, 2008 Share Posted December 16, 2008 probably not wrought iron but old steel can have some of the same problems ...can you forge weld? might fold it and forge weld it .. or grab a new piece of steel and start over .. Quote Link to comment Share on other sites More sharing options...
T Posted December 16, 2008 Share Posted December 16, 2008 I'm not a competent, but I don't think it is wrought iron... If it brakes for you it brakes for the blacksmith in the past... It can be cast iron maybe... Try forging it at a higher temperature, and maybe it won't brake... I hope i've said something correct and useful. :) Quote Link to comment Share on other sites More sharing options...
Quenchcrack Posted December 16, 2008 Share Posted December 16, 2008 Could be high sulfur steel. High sulfur creates a condition known as "hot shortness" where the sulfur collects at grain boundaries and can cause cracks at elevated temperatures. Quote Link to comment Share on other sites More sharing options...
metalliferous Posted December 16, 2008 Share Posted December 16, 2008 I can't be sure if this is the same problem, but I've cracked a cultivator blade before from forging it at a dark red. Maybe try forging it at a higher temperature (somewhere around orange). Quote Link to comment Share on other sites More sharing options...
Sam Thompson Posted December 16, 2008 Share Posted December 16, 2008 Have you tried a spark test? Quote Link to comment Share on other sites More sharing options...
Quentin Posted December 16, 2008 Author Share Posted December 16, 2008 i misspoke it was not red but it was orange... it didnt break off all the way, just had big cracks Quote Link to comment Share on other sites More sharing options...
Quentin Posted December 17, 2008 Author Share Posted December 17, 2008 yes, john did do a spark test, but he said he thought it was wrought also, i dont know what the results were on the spark test though. Quote Link to comment Share on other sites More sharing options...
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