Titanium wires

[AlbertCH]

I've been asked on another forum to repost some computations and thoughts here.
I've been trying to determine the resistivity of ESG's titanium wire, using linear resistivity data from ESG's website. So basically computing

.
Here's my findings:
- 0.18mm wire at 33.4 Ω/m gives 0.85 Ω.mm²/m,
- 0.20mm wire at 22.5 Ω/m gives 0.71 Ω.mm²/m,
- 0.25mm wire at 19.5 Ω/m gives 0.96 Ω.mm²/m,
- 0.32mm wire at 13.3 Ω/m gives 1.07 Ω.mm²/m,
- 0.40mm wire at 6.8 Ω/m gives 0.85 Ω.mm²/m.

The strange thing is that resistivity should be the same whatever the gauge. When asked by mail, ESG said that the linear resistivities were correct.

Is there something wrong with my calculations? I double-checked and triple-checked them, but I may be mistaken.
Is ESG's titanium wire somewhat inhomogeneous? It has been said repeatedly here that ESG's wire is 'pure titanium'. Therefore the only way I see to account for such dissimilar resistivities is that Ti is present in different phases. So maybe some sort of non-proportional quenching?
I have to say it's been on my mind for a few days now...

 

[Aal_]

I think when the magic is revealed we would know lol

 

[jjkanto]

I think I will reserve judgment about the whole titanium wire issue until I have had some time with the no nr-wire spools. My experience with the various ready wires has been great, except for a couple that broke at the join while wrapping. The flavor and vapor have been great, especially the 0.5 ohm ready wires! My iatty, and diver are my only atty's that require r-nr setups, but I see nothing but positive vaping experiences from ESG's titanium wires . Thanks BillyPapa!

 

[soulseek]

I've been asked on another forum to repost some computations and thoughts here.
I've been trying to determine the resistivity of ESG's titanium wire, using linear resistivity data from ESG's website. So basically computing

.
Here's my findings:
- 0.18mm wire at 33.4 Ω/m gives 0.85 Ω.mm²/m,
- 0.20mm wire at 22.5 Ω/m gives 0.71 Ω.mm²/m,
- 0.25mm wire at 19.5 Ω/m gives 0.96 Ω.mm²/m,
- 0.32mm wire at 13.3 Ω/m gives 1.07 Ω.mm²/m,
- 0.40mm wire at 6.8 Ω/m gives 0.85 Ω.mm²/m.

The strange thing is that resistivity should be the same whatever the gauge. When asked by mail, ESG said that the linear resistivities were correct.

Is there something wrong with my calculations? I double-checked and triple-checked them, but I may be mistaken.
Is ESG's titanium wire somewhat inhomogeneous? It has been said repeatedly here that ESG's wire is 'pure titanium'. Therefore the only way I see to account for such dissimilar resistivities is that Ti is present in different phases. So maybe some sort of non-proportional quenching?
I have to say it's been on my mind for a few days now...

I was wondering the same thing since when I looked at them on the site the numbers seemed to be off proportionally when comparing .18,.20 and .25 mm.
Since I only really care about the .32mm though I'll just order it and if the actual value is close enough to it then I'm fine with it.

 

[brookj1986]

Just got my spool of 28 gauge Ti wire. Decided to load it in my brand new stillare clone with rayon. Did a single coil just for the sake of testing.

So far it's good. will need to put in a topper I've used before so I can properly compare.

Sent from my Galaxy Note 3 via Tapatalk.

 

[Rossum]

Looks like 8 wraps. What diameter was it wound on? What resistance did you end up with?

 

[brookj1986]

Wrapped on, I believe, a 2.2mm screw. It's from a coiling tool a buddy sent. It varies between 0.7-1.0 ohm. It vapes nicely.

Sent from my Galaxy Note 3 via Tapatalk.

 

[Rossum]

Wrapped on, I believe, a 2.2mm screw. It's from a coiling tool a buddy sent. It varies between 0.7-1.0 ohm. It vapes nicely.

Interesting. I would have expected pure titanium to be around 0.5 ohms at room temperature.

 

[AlbertCH]

Well, I guess by now I won't have an answer to my questions.
Too bad, the lack of feedback and transparency kind of defeats the purpose of advocating a safer vape.
I understand the seller has to protect his trade secrets, but I'd rather have that answer than being just ignored.

 

[archimede]

Hi Mates,

I have an issue with the titanium wires.
I have been using 0,25mm and 0,32mm titanium wires for a while for my coils. I am using a Taifun GT and i realised that i have lost flavor with the titanium wires. I used to coil with kanthal 0.32mm. But when i coil with the titanium wires same way i coil with kanthal i feel the loss of flavor. Wicking is with Rayon as it was with kanthal. Anybody else has a similar problem?

 

[fright88]

what resistance are you ending up with vs what resistance do you normally run?

 

[billypapa]

Hi Mates,

I have an issue with the titanium wires.
I have been using 0,25mm and 0,32mm titanium wires for a while for my coils. I am using a Taifun GT and i realised that i have lost flavor with the titanium wires. I used to coil with kanthal 0.32mm. But when i coil with the titanium wires same way i coil with kanthal i feel the loss of flavor. Wicking is with Rayon as it was with kanthal. Anybody else has a similar problem?

You have to made the same resistance Ohm to have the same results, and if you do that you will have even better flavor.
Thats is the result of the most people until now.

 

[archimede]

I made coils with same resistance.Both for Kanthal and Titanium wires. They are all 1.0 ohms. Also, i am vaping with a vw device, tried many different watts to solve the problem. Below is the example coil i made with titanium 0.32mm wire. It is 1.0 ohms.

 

[imeothanasis]

maybe you are so used on the taste of kanthal that you think your liquids smell like this archimede. Be sure that with titanium wires the only you taste is your liquid

 

[Rossum]

Or perhaps his coil resistance increases (Titanium has a substantial temperature coefficient) and his VW mod doesn't monitor and adjust for this while firing? I know for a that real DNAs do monitor and adjust for changes in coil resistance while firing, but my understanding is that most other VW mods don't; they take one reading when the user presses the fire button and assume that the resistance won't change during that firing cycle.

 

[archimede]

Imeo,
It is a different but considerable idea. I will give the titanium wires another try tomorrow, will try to solve the situation. I don't believe that the flavor i get before was kanthal's flavor. Another interesting situation is that, in my ithaka i am using esmokeguru's ready 1 ohm titanium wires and they perform really great, much better flavor and vapour than the classical ready wires...

Rossum,
I thought about that fact, my VW device is Taifun The Eye, it is not monitoring the ohms while firing as you said. But i increased the watt step by step from 10 watts to 22 watts, since i get the burn taste. I felt the same loss.

 

[f1vefour]

I thought touching (contact) coils were a bad idea with titanium wire...perhaps the coil is shorting out.

Try spreading the wraps.

 

[imeothanasis]

wires dont play a role on taste archi except they smell themselves like kanthal. So the only thing that I can think off is that your coil was not made very well. It has happen to me enough times and it was always the way I was making the coil. We cant make same coils all the time

Imeo,
It is a different but considerable idea. I will give the titanium wires another try tomorrow, will try to solve the situation. I don't believe that the flavor i get before was kanthal's flavor. Another interesting situation is that, in my ithaka i am using esmokeguru's ready 1 ohm titanium wires and they perform really great, much better flavor and vapour than the classical ready wires...

Rossum,
I thought about that fact, my VW device is Taifun The Eye, it is not monitoring the ohms while firing as you said. But i increased the watt step by step from 10 watts to 22 watts, since i get the burn taste. I felt the same loss.

 

[imeothanasis]

Thats true too F1. Maybe the wire was not oxidised well and it was shorting out
Titanium can accept oxidation like all the other wires but oxidation is the worse thing you can do to yourself.

I thought touching (contact) coils were a bad idea with titanium wire...perhaps the coil is shorting out.

Try spreading the wraps.

 

[archimede]

Thats true too F1. Maybe the wire was not oxidised well and it was shorting out
Titanium can accept oxidation like all the other wires but oxidation is the worse thing you can do to yourself.

I did not oxidise the titanium wire at the picture Imeo. After what you told about the oxidation before on this thread i quit oxidising the wires. I wraped the coil just with hands without oxidation, no jet butane lighters.