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Thread: Resistance Wire - Kanthal/Nichrome

  1. #1
    Da Catt Team ECF (folding@home)
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    Default Resistance Wire - Kanthal/Nichrome

    There has been a run on the Kanthal A-1 resistance wire that's been for sale on eBay with the surge in rebuildable atomizers. I've done some research into the resistivity and composition of the various Kanthal and Nichrome wires.

    Kanthal is an alloy composed mainly of Iron, Chromium and Aluminum. The main difference between the composition of the different grades of Kanthal is the percentage of Aluminum.

    Kanthal A-1 has 5.8% Aluminum
    Kanthal A has 5.3% Aluminum
    Kanthal D has 4.8% Aluminum

    All grades have Chromium in the range of 20.5% to 23.5%.

    The remaining 70% - 75% is made of Iron.

    In my opinion, there should be no (or not very much) difference (in regards to vaping) between the different grades of Kanthal than the slightly different resistances (see the table below).
    =====================

    Nichrome comes in various compostions. The main components are Nickel and Chromium.

    Jacobs Online carries Nichrome 60 (also called Chromel C). This is composed of 60% Nickel, 16% Chromium and 24% Iron.

    --------------------------

    PnJ Resources carries Nichrome 80. This is composed of 80% Nickel and 20% Chromium

    ======================

    At the temperatures we vape at, there should be no metallic vapors given off by these wires due to heat.
    It has been stated by a number of ECF members that Kanthal (A-1) gives a cleaner tasting vape than Nichrome and that Kanthal (A-1) is a stronger more robust wire than Nichrome.
    With either material, a thicker wire (smaller awg #) will, most likely, have a longer lifespan than a thinner wire.
    =======================

    Resistance in Ohms/inch for the Resistance Wires

    Kanthal Grade----- A-1 ------ A -------- D ----- Nichrome 60 -------- Nichrome 80

    30 awg (Ω/in)----- 0.7 ------ 0.7 ------ 0.7 -------- 0.6 -------- -------- 0.5
    31 awg (Ω/in)----- 0.9 ------ 0.9 ------ 0.8
    32 awg (Ω/in)----- 1.2 ------ 1.1 ------ 1.1 -------- 0.9 -------- -------- 0.9
    33 awg (Ω/in)----- 1.4 ------ 1.4 ------ 1.3
    34 awg (Ω/in)----- 1.8 ------ 1.8 ------ 1.7 -------- 1.4 -------- -------- 1.4
    35 awg (Ω/in)----- 2.3 ------ 2.2 ------ 2.1
    36 awg (Ω/in)----- 2.9 ------ 2.8 ------ 2.7 -------- 2.3 -------- -------- 2.1

    Spreadsheet calculations for the resistances

    ETA: These ohms/inch numbers are a close average. Due to small variations in wiire thickness, if you cut a one inch piece of wire, the resistance may be +/- 0.1 or so ohms from the numbers in the table above.

    Always measure the resistance of a new coil set-up with a multimeter before attaching it to your battery.
    Last edited by TomCatt; 08-03-2012 at 12:39 PM.
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    Thank you...saved and printed...
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    Quote Originally Posted by Suthrnbuckhunter View Post
    Thank you...saved and printed...
    Oh,and very nice spred sheet...
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    I actually just ordered from pmj yesterday,got the sample pack for 15.00 free shipping.I figured since Im a total noob to rebuilding,it would give me plenty of options to play around with...this info you posted will add to the enjoyment
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    Thanks TC, quite a useful reference.
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    Da Catt Team ECF (folding@home)
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    If you find any errors there, as, let me know .
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    Why didya leave out what is probably the best Kanthal for our rather unique requirements?

    Kanthal AE


    With either material, a thicker wire (smaller awg #) will, most likely, have a longer lifespan than a thinner wire.
    Maybe, but ohms for ohms the thinner wire will heat up much more quickly. A good thing?

    As far as taste, they are many who feel that it is the Kanthal that has the metallic/iron taste.
    "The farther backward you can look, the farther forward you are likely to see"

    Try searching...

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    Kanthal AE sounds nice, but I don't see anyone selling 32G (or awg). Got a link?

    For me I don't see it as a good thing, just more frustration. That's me though.
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    Here's a post from mwa:
    http://www.e-cigarette-forum.com/for....php?p=6897073

    He bought directly from the Kanthal company. There's a rather large minimum order though.


    Sent from my iPod touch using Tapatalk
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    Hmm, 5lb for $250 from a stateside distributor is a wee bit steep. Maybe I should brush up on Swedish or whatever and go for the real source. Hopefully with all the recent demand some ebay sellers will ramp up their supply before I really need it. Trouble is my brother showed an interest in vaping and I was only able to leave him with a couple of feet.
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