For starters I think SS has to low a TCR to work reliably in many TC mods .0008 - .0013. The bottom TCR limit .001 had to be lowered in the DNA-200 to enable it's use & that is one of the most capable devices. Another issue is that there is so many grades of SS how do you really know what you've bought? You can use some factory tanks like the Uwell Crown with 316L SS coil heads, but that raises another question. Why do people think SS is safer then any of the other alloys?? There is a perception that SS is used for surgical implant etc. So it must be safe right! Well ignorance is bliss for some I guess. For me I know there are over 200 grades of SS with many different compositions and processes such as annealing, heat treating, & cleaning. Just using the Crown coils as an example here is the composition of 316 SS
COMPOSITION
Type 316 Type 316L
% %
Carbon 0.08 max. 0.03 max.
Manganese 2.00 max. 2.00 max.
Phosphorus 0.045 max. 0.045 max.
Sulfur 0.030 max. 0.03 max.
Silicon 0.75 max. 0.75 max.
Chromium 16.00 - 18.00 16.00 - 18.00
Nickel 10.00 - 14.00 10.00 - 14.00
Molybdenum 2.00 - 3.00 2.00 - 3.00
Nitrogen 0.10 max. 0.10 max
Iron Balance Balance
We've already got many of these elements in Kanthal, Nichrome, & Ni 200.
So 316 SS takes the elements we're already vaping and adds Manganese & Molybdenum??? I have seen no one attest to the safety of Manganese or Moly & the only thing that would effectively seal these elements from the e-juice would be an oxide layer.
Kanthal was specifically designed to form an oxide layer, So was Nichrome albeit inferior to Kanthal. As for SS well don't know???
The quote below is from the Kanthal manual and Nicrothal is kanthal brand Nichrome
"The protective oxide layer on Kanthal® alloys formed at temperatures above 1000°C (1830°F)
consists mainly of alumina (Al2O3). The color is light grey, while at lower temperatures (under
1000°C (1830°F)) the oxide color becomes darker. The alumina layer has excellent electrical insulating properties and good chemical resistance to most compounds.
The oxide formed on Nikrothal® alloys consists mainly of chromium oxide (Cr2O3). The color is
dark and the electrical insulating properties inferior to those of alumina.
The oxide layer on Nikrothal alloys spalls and evaporates more easily than the tighter oxide layer
that is formed on Kanthal alloys."