Testing 304 and 316 with simple Magnet test!

Old School magnet test on 304 steel and 316 stainless steel to show the difference in iron content.
Stainless steel contains different levels of iron and this magnet test can identify 304 ss from 316, but not all magnets will work! The trick is to have a tiny magnet fragment that has a magnetic force stronger than its weight, Thanks for watching!

[@Joseph-cy3ns]

Both grades have similar amounts of iron, chromium, nickel, manganese, silicon, and carbon, but the presence of molybdenum gives 316 stainless steel superior corrosion resistance properties compared to 304 stainless steel, particularly in harsh environments.

[@osher87]

Nope. 304 has 18% Cr, the 316 has 16%
Nickel % also 8% in 304 vs 10% in 316

[@osher87]

Also the general use is for hot water in 316...big difference in corrosion resistance

[@RondeLeeuw]

"Stainless steel should be non-magnetic."
*stops video* 🤦 Certain types of stainless steel are magnetic, and others aren't.

[@FreeThinker0]

I think what he meant is the stainless steel for the vinegar tank.

[@isisunayak]

Any chemical is available to check the ss grade 304 vs 316 like 202 vs 304?

[@jit.junction]

Thanks 👌👍

[@blight1885]

"stainless steel should be non-magnetic"
martensitic stainless steel: "are you sure about that?"
Still, the corrosion resistance on martensitic stainless is nowhere near as good as in austenitic stainless like 304 and 316, so yeah for vinegar you definitely want non-magnetic/austenitic stainless

[@ivonakopanja9224]

This didn't prove to be true I just tried. 304 that I have in the house is also non-magnetic.

[@UnsanctionedFabrication]

It depends on the weight of the magnet to the magnetic strength ratio. Most refrigerator magnets are very weak and relatively heavy for its size. We use either magnet fragments or very small/very strong neodymium magnets to perform our quick tests.

[@teacherkim9953]

thank you. I learned a lot. I thought 304 is not magnetic

[@paulmaxwell8851]

#304 and #316 are generally non-magnetic but can become mildly magnetic through being cold-worked. ie bending, deforming. There is no simple method for identifying a stainless with a magnet. That drain fitting in the video, however, is strongly magnetic and could be a martensitic stainless.

[@gregthompson8062]

@@paulmaxwell8851 You are correct. I have some 316 grade steel ratchet buckles that were manufactured to my specs and due too all the bending in the manufacturing process they are slightly magnetic. Magnet tests should not be used to test stainless steel.

[@user-nz6de6mw1z]

Thank boss

[@myhobby3951]

Old fashiooonnnn

[@guillermoiturriaga7863]

🔥🔥Best test is with POTASSIUM TIOSANATE + 9V BATTERY.

[@kennethearl9878]

Which one should I choose for perfume storing tank?

[@UnsanctionedFabrication]

I assume perfume is alcohol based so 304 Stainless Steel should be fine.

[@kennethearl9878]

@@UnsanctionedFabrication Yes, oil & alcohol.

[@msdweldingfabrication7051]

It could be cheap Chinese stainless steel most 304 is not magnetic at all

[@rockyball8718]

😎 PЯӨMӨƧM