Stainless Austenize 1000c/1830f

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Hawky

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Jun 11, 2019
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Limited with funds and the HT oven I have, is there any stainless suitable for HT at a max of 1000c/1830f?
 
Hawky said:
Limited with funds and the HT oven I have, is there any stainless suitable for HT at a max of 1000c/1830f?
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440b, 440c, and z-fi it can be done at lower temps, but you will be limited to mid 50’s Rc hardness.
 
Willie71 said:
440b, 440c, and z-fi it can be done at lower temps, but you will be limited to mid 50’s Rc hardness.
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Z-Finit is certainly on the list. Guess I could use cryo to bump hardness up on whichever steel I chose if required.
 
Hawky said:
Z-Finit is certainly on the list. Guess I could use cryo to bump hardness up on whichever steel I chose if required.
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Even with cryo, you would not get above Rc56/57, most likely. You might hit Rc58, but I wouldn’t count on that.
 
Definitely for me I'd stick to carbon or semi-stainless, big fan of D2.
Just that some folk like stainless above all other qualities, so if I fancied selling then it makes some sense to have a stainless offering.
 
gammarad said:
Most likely not. Cryo increases hardness by reducing retained austenite. If you're under austenizing, the Mf temperature is higher, and cryo will make a smaller and smaller difference.
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That is an extremely good point which I hadn't thought of, cheers mate.
 
Hawky said:
Definitely for me I'd stick to carbon or semi-stainless, big fan of D2.
Just that some folk like stainless above all other qualities, so if I fancied selling then it makes some sense to have a stainless offering.
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If you are selling, get a better oven. Your market with sub standard heat treat will be limited.
 
Willie71 said:
If you are selling, get a better oven. Your market with sub standard heat treat will be limited.
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I'd only sell if it was acceptable, get it independently hardness tested and all that.
Likely won't but I'd like to give it a try and see.
More than happy with carbon really but the fun is experimenting.

Better oven maybe one day, or upgrade this one, but not possible at the moment so may as well have some fun in the mean time!
 
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