TC beyond Ni200: Nickel Purity, Dicodes; Ti, SS, Resistherm NiFe30; Coefficient of Resistance
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I lost track of how old my titanium coils are. They all work like the day I built them and no reason to change. I'm soooo lazy. I guess that's not a bad thing though. If humans weren't lazy we wouldn't have invented tools to make things easier.I'm happily vaping on my three month old Ti coil. So... What's new around here to try out?
Duane
Well, I'm always open for something that allows me to only change coils every 6 months or a year and not having to worry about it
now if i could only find wicking that would last 6 months.... i am loving titanium coils tho.Well, I'm always open for something that allows me to only change coils every 6 months or a year and not having to worry about it
I believe this has been posted before, but this is from the Kanthal site about NiFe52:If I recall the 'swan song' of NiFe52 was the (on paper) 'triple hit':
While the above is all well and good I've been mostly happy and satisfied with the Unkamen SS430. Yesterday I did my 1st ever dryburn/clean of one of my SS430 coils. As I've gotten fairly good at wick+coil replacement the time saved was not all that much but I was happy I was able to do it. I'm also happy that the +1.0 ohm coils I've made with the SS430 can be fired on everything from my old 15W VV/VW mods to TC mods and anything in between. You'd be amazed how much battery life I get out of my 1.8ohm build being driven by a mere 16W in TC mode.
- higher wire resistance - can use larger diameter wire
- higher TCR - more accurate TC vape
- safe to dry burn
http://kanthal.com/en/products/mate...heating-wire-and-resistance-wire/nifethal-52/
Temperature °C 100 150 200 250 300 350 400 450 500
Temperature factor of resistivity
Ct -------------------- 1.33 1.53 1.73 1.93 2.13 2.32 2.49 2.64 2.77
It doesn't look like mine
Hi duane
I agree but the Curie temp is pretty high right? Other than that the interesting things are resistivity, Tcr and heat capacity I guess. Also oxidative properties etc are also important from a safety perspective.
Yes, the other properties you mentioned are important but are much less sensitive to chemistry variation than Curie Temperature which relates strongly to TCR, thermal expansion characteristics etc.
I'm hoping that Ralph/Unkamen will find that they really didn't send him NiFe52 but some other NiFe alloy. It would be a real downer to find that the '52 alloy was terribly sensitive to specific batch chemistry.
For those who have tried the German equivalent to NiFe 52 what is the experience with TCR? Values?
Is there experience which indicates that the theoretical benefits of NiFe52 translate to practical day to day vaping benefits? What is the anecdotal experience?
Duane
Just curious where does this NiFe52 come out when you wrap a coil compared to what it is supposed to on Steam Engine.
From post [HASHTAG]#2337[/HASHTAG]
It came out to .480Ω where Wire Wizard puts it at just under 0.3Ω.
Work hardening can significantly change resistance of Nickel Iron alloys. I'm not sure if Steam Engine is referencing TCR data for annealed material. That's something we should know together with whether the coils we're building have annealed or work hardened material.
This whole thing is getting pretty technical when all we want is a decent and safe vape.
I guess that's the price of beneficial new technology.Duane
absolutely..
SoI have been using the german NiFe52. The theoretical resistivity from steam engine has precisely predicted the resistance of the few coils I have wrapped. I have also been using it on the dicodes using a tcr of 41 (should be 40.6 i think) and the vape is excellent. I have also been using microcoils, dry pulsed and compressed as if they were kanthal with absolutely no issues so far! I am the biggest fan of Ti as many will know but I think the NiFe might displace it!
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Good to know.
For anyone who wants to explore NiFe 52 (or equivalent alloys by another name) it would probably be safer to order from Germany until the whole Unkamen NiFe 52 puzzle is resolved.
Duane
Are there posts here adrwessing saftey concerns with these wires? Just curious.
There should be more info on Monday evening, Ralph might have some and some others will be getting their orders of the NiFe in question. I agree with "better to order from Germany for now part"
For some reason I decided to do some checking again after looking at the data sheet a few posts back.
All I checked was cold resistance (0.508Ω) and resistance at 450F (0.638), not much of a rise there.
All I checked was cold resistance (0.508Ω) and resistance at 450F (0.638), not much of a rise there.
The german Zivipf NiFe52 which is offered under the chemical formula NiFe48 comes from Kanthal. I checked the Ohm/m and the TCR too, both match Kanthal´s latest datasheet.
It replaced all my Titanium and SS coils - only some big atties like FeV and Big German still have Ni200.
It replaced all my Titanium and SS coils - only some big atties like FeV and Big German still have Ni200.
As posted above I have been wrapping 6 spaced NiFe 52 (Zivipf from Germany) on my GEM and SquapeRs (0.32 ohms) with more than decent results: dry-burning at 7 watts.
Very hesitant to build NiFe 52 for my two Kayfun 4's coz I have been 'expert' at Ni 200 on them for a long time. Rebuilt one with Ni 200 coming in at 0.15...a perfect vape on either the VS 200 or the Lavabox 200.
Built the second K4 as Ni 200 but wasn't careful. Not satisfying, wraps touching. So decided to build a contact (or micro-coil) on 2.5 Kuro with NiFe 52. I built 7 wraps which I now know was a mistake (at 0.43), dry-burned and slightly compressed. Should have wrapped 6.
Outstanding vape! Am certain vape will be perfect with 6 wraps coming in at the same ~ 0.30-0.32.
Will leave the Titanium Titans in their TiO2 dust. [emoji41]
ETA: Raised the Room Temp on my SX M from 20 C to 22 C with the NeFi 52 on the SquapeRs. Much more pleasurable.
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That's what I'm talkn' bout. 3 month old Ti coils rock!! If the one I'm vapn' on right now isn't 3 months old it's darn close. Thanks for your help with Ti early on Tony, your recommended low wattage dryburn technique is still workn' great for me.I'm happily vaping on my three month old Ti coil. So... What's new around here to try out?
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