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Far to many things to quote
Brass, Bronze, Aluminum, Titanium and POS (Plain old Steel) should all be avoided for applications coming in contact with e-juice. They are all considered Reactive metal alloys and will form Oxides that should not be ingested. Stainless Steel (SS) alloys would be the metal of choice.
Stainless Steels primary alloys are Chromium and Nickel. It is the Chromium that gives SS it corrosion resistance and part of its strength. The more Chromium in SS, the higher the corrosion resistance. Nickel is added to give toughness and strength to SS alloys. To be considered a TRUE SS, an alloy should contain at least 12% Chromium and 3% Nickel. The maximum effective amount of Chromium in SS is around 20%
No SS alloys with 12% Chromium or higher will rust, form Iron-Oxides. They form Chromium Oxides which breaks the Oxygen / Iron Redox.
304 SS is an Excellent Alloy. High Chromium and about 10% Nickel. It is also a tough metal to machine, drill or cut threads in.
440 SS is also an Excellent choice when maximum strength is not required. It has high amounts of Chromium and no Nickel. It is not considered to be a True SS because of its lack of Nickel. But it is MUCH easier to machine / Fabricate due to the fact that it contain no Nickel.
All the 4xx series SS alloys were develop to aid manufacturing were ultimate strength were not needed. Their prices are somewhat less than 3xx series SS alloys. For the amount you would use for a e-Cig mod, price is going to be a real factor verse a health risk.
No matter what SS alloy you consider, its the Higher amounts of Chromium will provide higher levels of corrosion resistance. Not the series. For any given percentage of Chromium, I would always suggest that you try to use a 4xx series because it is Much easier to work with.
But realistically, any SS you buy is going to be fine.
If you into reading about metal alloys or teach Metallurgy courses, you might consider the link below. It is a good site to reference metals.
MatWeb - The Online Materials Information Resource
MatWeb - The Online Materials Information Resource
Brass, Bronze, Aluminum, Titanium and POS (Plain old Steel) should all be avoided for applications coming in contact with e-juice. They are all considered Reactive metal alloys and will form Oxides that should not be ingested. Stainless Steel (SS) alloys would be the metal of choice.
Stainless Steels primary alloys are Chromium and Nickel. It is the Chromium that gives SS it corrosion resistance and part of its strength. The more Chromium in SS, the higher the corrosion resistance. Nickel is added to give toughness and strength to SS alloys. To be considered a TRUE SS, an alloy should contain at least 12% Chromium and 3% Nickel. The maximum effective amount of Chromium in SS is around 20%
No SS alloys with 12% Chromium or higher will rust, form Iron-Oxides. They form Chromium Oxides which breaks the Oxygen / Iron Redox.
304 SS is an Excellent Alloy. High Chromium and about 10% Nickel. It is also a tough metal to machine, drill or cut threads in.
440 SS is also an Excellent choice when maximum strength is not required. It has high amounts of Chromium and no Nickel. It is not considered to be a True SS because of its lack of Nickel. But it is MUCH easier to machine / Fabricate due to the fact that it contain no Nickel.
All the 4xx series SS alloys were develop to aid manufacturing were ultimate strength were not needed. Their prices are somewhat less than 3xx series SS alloys. For the amount you would use for a e-Cig mod, price is going to be a real factor verse a health risk.
No matter what SS alloy you consider, its the Higher amounts of Chromium will provide higher levels of corrosion resistance. Not the series. For any given percentage of Chromium, I would always suggest that you try to use a 4xx series because it is Much easier to work with.
But realistically, any SS you buy is going to be fine.
If you into reading about metal alloys or teach Metallurgy courses, you might consider the link below. It is a good site to reference metals.
MatWeb - The Online Materials Information Resource
MatWeb - The Online Materials Information Resource
12-14 gauge piercing needles
they are hollow....
and made of stainless steel and are sold in 3 inch lengths..hoping to help,
4g~5.0mm-----------4.50mm-------------0.25mm
6g~4.20mm-----------3.70mm------------0.25mm
8~3.36mm------------2.96mm------------0.20mm
10g~2.76mm---------2.36mm------------0.20mm
11g~2.38mm---------1.98mm------------0.20mm
12g~2.10mm---------1.70mm------------0.20mm
13g~1.82mm---------1.46mm------------0.18mm
14g~1.62mm---------1.26mm------------0.18mm
15g~1.46mm---------1.10mm------------0.18mm
16g~1.26mm---------0.90mm------------0.18mm
17g~1.13mm---------0.77mm------------0.18mm
18g~1.03mm---------0.67mm------------0.18mm
19g~0.88mm---------0.52mm------------0.18mm
20g~0.79mm---------0.43mm------------0.18mm
they are hollow....
and made of stainless steel and are sold in 3 inch lengths..hoping to help,
4g~5.0mm-----------4.50mm-------------0.25mm
6g~4.20mm-----------3.70mm------------0.25mm
8~3.36mm------------2.96mm------------0.20mm
10g~2.76mm---------2.36mm------------0.20mm
11g~2.38mm---------1.98mm------------0.20mm
12g~2.10mm---------1.70mm------------0.20mm
13g~1.82mm---------1.46mm------------0.18mm
14g~1.62mm---------1.26mm------------0.18mm
15g~1.46mm---------1.10mm------------0.18mm
16g~1.26mm---------0.90mm------------0.18mm
17g~1.13mm---------0.77mm------------0.18mm
18g~1.03mm---------0.67mm------------0.18mm
19g~0.88mm---------0.52mm------------0.18mm
20g~0.79mm---------0.43mm------------0.18mm
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That was my thought..finding the right OD syringe and using epoxy probably to seal the connection. I also read awhile back about someone finding some teflon tubing that was supposed to have high heat resistance..not sure what happened to that train of thought though.
Also would this brass problem negate the use of the little brass nipples and tubing scavenged from the fireplace lighters as well?
Also would this brass problem negate the use of the little brass nipples and tubing scavenged from the fireplace lighters as well?
It is possible that the brass fittings would have the issue, but since there is suction pulling the liquid away from the adapter... it is not in constant contact with the e-liquid. But I agree it should be a concern.
Take a look here - 14 AWG Gauge MIL-SPEC Teflon® TFE Tubing TFT-250-14: In Stock Buy Now | West Florida Components. They have 7,8,14,18, & 24 gauge. The 7 & 8 is $1.00 a foot, 14 & 18 is $.30 a foot & the 24 is $.25 a foot.
From the site -
Thanks Sci.
So would the idea be to use the tube from the bottle, directly into the atty vs using any brass at all?
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Does anyone know what type/grade of metal is used in medical syringe needles?
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Thanks Sci.
So would the idea be to use the tube from the bottle, directly into the atty vs using any brass at all?
In theory yes...and from what I've read before the stuff is extremely flexible and sturdy, so probably would resist any kinks from bending around and through stuff.
Would this application also work with a nico-drip application (through a cart)? I guess I will have to look for a non-brass way to allow the cart to be replaceable, in case the cart wears out.
Sorry for the multiple questions and the fact I feel like I just hijacked a post. :\
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It would definitely work as external drip tubing through the cart..no problem. The potential advantage comes in using the teflon to bottom feed the atty vs brass or other metal. The question arises as to the max heat an atty is producing as the teflon is rated to withstand 500 degrees Fahrenheit. It has been theorized the atty is heating somewhere around 300-400 so it should be ok..and someone was testing it awhile back, but didn't follow up to get the results. I'll see if I can search and find the original testing post.
Ok..here is where the teflon tubing discussion starts and runs for many more pages.
http://www.e-cigarette-forum.com/forum/modders-forum/64983-e-pipe-juice-machine-17.html
Still haven't read to the end of it yet..but there it is.
EDIT: read to end of thread..didn't find a definitive post where someone actually used the teflon with success...so still don't know if it's viable.
http://www.e-cigarette-forum.com/forum/modders-forum/64983-e-pipe-juice-machine-17.html
Still haven't read to the end of it yet..but there it is.
EDIT: read to end of thread..didn't find a definitive post where someone actually used the teflon with success...so still don't know if it's viable.
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Interesting read, it appears some people are using a Teflon/brass or copper combo. I may try the straight Teflon method.
Nothing on here or google with "CFOA & brass" a typo maybe? A hint or something to go on? lol
I'd never mix brass and e-juice.......
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