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Will Heating a Carbon steel blade sporadically up to 200°f can ruin the heat treat of the steel ???
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Is 200°f enough to disturb heat treat ?
- Thread starter SteelJunkee
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Typically you have to hit about 350° F to have meaningful impact on heat treatment. But I wouldn't be surprised if a long enough duration at 200° F would potentially impact things. Tempering is a factor of both temperature and time. What's the context we're talking about here?
BluntCut MetalWorks
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No, for normal edge tools - includes what you've in mind. There are exception/specialty ht for cold-use when 200F is above operating temperature spec/condition.
Last edited:
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Didn't want to tldr so... I have a bunch of knives with a really tough Epoxy coating and when heated around 200 the coating comes off without even having to sand 
but still after this process those shaving sharp edges come out dull as butter knives so I was wondering if I was sk...... The heat treat of the blades.... Some of them need some time on a stone to get back 
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but still after this process those shaving sharp edges come out dull as butter knives so I was wondering if I was sk...... The heat treat of the blades.... Some of them need some time on a stone to get back .
BluntCut MetalWorks
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Most likely softened epoxy coated the edge = wide smooth apex. Try clean edge with paint thinner or somesort of lacquer removal. Also hopefully 200 was done in well controlled and even or in boiling water.
Didn't want to tldr so... I have a bunch of knives with a really tough Epoxy coating and when heated around 200 the coating comes off without even having to sand
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I tough it was that in the beginning, I removed the coating with a razor blade and there was minimal leftover on the edge after cleaning, but still I have to sharpen and strop them back to pristine condition, strange never had that with other coatings...
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But still...
BluntCut MetalWorks
... You are right... melted epoxy is probably filling the edge. I can see my diamond plate is filling with it thanks.
BluntCut MetalWorks
... You are right... melted epoxy is probably filling the edge. I can see my diamond plate is filling with it thanks.
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A quick pass on a smooth steel brush wheel solved it all 
... thanks Bluntcut that saved me a lot 
... thanks Bluntcut that saved me a lot