Stainless Steel Test Kit for Differentiating 316/304 [Packaging Upgraded 2025]

The description says it can identify 316 and 304, however the extremely limited instructions only explain testing for 316 even though the bottle clearly shows 304 as well. It seems that with 304 the color doesn't change, but based on what it says in the instructions, the color may not change for other types of metal as well. That makes this a poor test for anything other than 316 testing, which unfortunately is not what I need since I'm trying to test for 304. Now the only thing I know for certain about the metal I'm testing is that it's not 316 Stainless, but since it's also not magnetic, I assume it's 304. The point of the test was to confirm this.

The product is designed to differentiate 304 and 316. It's only useful if you know for sure the metal in question is either 304 or 316. It lets you test for the presence of molybdenum which is what makes 316 more resistant to chloride corrosion than 304.Complaining that it can't positively ID 304 in a vacuum makes no sense.

Tried many chemicals suggested on internet. This is the only quick, accurate, and cheap method to differentiate 316SS from 304SS