Yes, there is NiTiNol that has that amazing property, really nice for glass frames or other applications, but in think this NiTiNol used for blades is different.kodai78 wrote: ↑Sun Mar 29, 2020 2:51 pmNitinol has some very special properties. Including changing shape when reheated. Even at temps as low as 98°. That’s why it’s used in cardiac stents. Might be a problem in a knife blade? Search Wikipedia for more info. (Sorry I couldn’t figure how to paste a link)
See, this is one of the reasons I respect Spyderco so much. Look at this response. We got an awesome history, reasons and explanations. Direct from Sal F'ing Glesser (professional title).sal wrote: ↑Sun Mar 29, 2020 9:53 amGail and I began testing salt water corrosion resistant materials in the early 80's. We were divers and sailors and felt there was a need/market for knife that could be used in Salt Water with little or no corrosion. This is a problem with a knife because the edge is the first to go because it's exposed on two sides.
We tested all kinds of steel, ceramic, Titan, Cobalt blades and even had custom makers make their "special" alloy for us to test. The main problems encountered were poor edge retention or very high cost to manufacture. The next test for edge retention was to serrate the edges. Serrated ceramic tended to crack through the middle of a serration when pushed too hard or dropped on hard surfaces. We tried Alumina ceramic and TTZ. All of the Titan alloys and pure Titan still would not hold an edge to our satisfaction.
I remember one custom alloy that I tried made by a knowledgeable maker began to rust before my eyes as I was going down n a dive after jumping from the boat. The problem was far more difficult to solve for the general market than we thought.
David Boye's Dendritic Cobalt was acceptable and we made an number of knives that we cast in a Cobalt material, but the cost for a larger knife became prohibitive.
About the turn of the Century, Chronidur 30 was invented as the first Nitrogen steel. We weren't able to get it because they said that we were an international company and we might ship a knife to an "unfriendly country" that might infringe on their patents. They also said that NASA was buying all they could make.
In the early 2000's, one of our long time Japanese traders brought us H1. We were slow to test it and move on it because our company was having very difficult financial problems at the time (we came very close to going bankrupt). Eventually we tested and liked the material and moved into it. But we had to buy a lot to do what we wanted. We spent millions producing and promoting H1 and now 15 years later, it is a staple in our steel stable.
We added LC200N recently (Chronidur 30 under another name) and we are now using both, and we're still testing. We are always open to trying new materials for this market, but many are just too expensive to make a general market product, combined with the fact that we have to make a bunch just to test it.
I'll look into NiTiNOL if Crucible will play, but I can make no promises as it is costly.
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