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a crazy thought!!!!!!!!
- Thread starter chad2
- Start date
i emailed Haslinger about this asking him if he still does this and if it has the same affect on stainless as it does on carbon steel this was his response.
Chad,
Thank you for your inquiry. Yes, I still do it, however only by request, as it is time consuming, as well as more costly to do so.
Yes again to the benefits being similar as in a carbon steel blade.
However Rockwell differences between the cutting edge and spine are on average 4 - 6 RC, so not quite as much as a differential treated carbon steel blade would be. With stainless steel one looses corrosion resistance in the lower RC values. So one has to compromises between toughness and corrosion resistance. On average a differential stainless blade will bend up to 25% more then a regular heat-treated stainless blade.
If you have any additional questions, please let me know.
All my best,
Thomas
Chad,
Thank you for your inquiry. Yes, I still do it, however only by request, as it is time consuming, as well as more costly to do so.
Yes again to the benefits being similar as in a carbon steel blade.
However Rockwell differences between the cutting edge and spine are on average 4 - 6 RC, so not quite as much as a differential treated carbon steel blade would be. With stainless steel one looses corrosion resistance in the lower RC values. So one has to compromises between toughness and corrosion resistance. On average a differential stainless blade will bend up to 25% more then a regular heat-treated stainless blade.
If you have any additional questions, please let me know.
All my best,
Thomas
james terrio
Sharpest Knife in the Light Socket
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It's cool that Mr. Haslinger responded. I will decline from stirring up any arguments about whether or not you might want your knife to bend 
It's cool that Mr. Haslinger responded. I will decline from stirring up any arguments about whether or not you might want your knife to bend
lol i would love to hear them. its not like i have the technology to do his procces anyways so lets hear it. lets keep this a disscusion like it is not an argument
james terrio
Sharpest Knife in the Light Socket
- Joined
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Well, since you asked... one school of thought likes a hard edge with a much softer back. The idea is that the softer-back-knife is less brittle overall than it would be if the knife was the same hardness throughout the blade. This reduces the chances of it breaking during hard use like chopping. Under extreme lateral stress like prying a big rock out of the ground, it will tend to bend rather than break. This technique has been used for centuries, especially on big blades and swords. Low-alloy carbon steels like 1095, 1084 etc can benefit from this technique. The ABS requires its journeyman and master smiths to make a differentially-tempered blade that will bend without breaking, mainly to prove that they understand how.
The other school of though holds that, among other things, a bent knife is hard to use but a knife with a broken tip will still cut just fine, and in fact it's possible to make a knife that will neither bend nor break unless you get a heckuva lot of leverage on it. These guys often (but not always) choose more complex steels that are designed for high toughness even at high hardness levels. Some of them have been heard to say that if they ever had another child, they would name it vanadium.
The other school of though holds that, among other things, a bent knife is hard to use but a knife with a broken tip will still cut just fine, and in fact it's possible to make a knife that will neither bend nor break unless you get a heckuva lot of leverage on it. These guys often (but not always) choose more complex steels that are designed for high toughness even at high hardness levels. Some of them have been heard to say that if they ever had another child, they would name it vanadium.