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Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Is my keg stainless steel or aluminum?
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Old 11-19-2008, 04:25 AM   #21
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Yup my neighbor pulled out a stainless Firestone keg like you have on the left. It has been over grown in a ivy fence the last 8 years just discovered. It's the odd duck as all my kegs are AB, this odd Firestone will be my plasma practice cutting, sawing, milling apart, welding and practice on keg in the future. It just isn't right to have a single tier with two A Bush kegs then one Firestone in the lineup, just flat looks out of place.
I'd love to have it to get rid of my ab keg, wanna trade?
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Old 11-19-2008, 07:51 AM   #22
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I'd love to have it to get rid of my ab keg, wanna trade?
Check your PM.
Carl........
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Old 11-19-2008, 07:56 AM   #23
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I think you've got 2 SS kegs, bro. Aluminum kegs are very rare because they're just not sturdy enough to hold up to the abuse they take. I think the ones that are out there are typically imports.

The file/gouge test would've had very different results between the two, as aluminum is much softer than SS. You should've been able to easily file off or dig a big gouge in the aluminum.
The aluminum keg is from a defunct cider brewery in the Portland area so I'm guessing they were custom jobs for that particular brewery. It is noticeably lighter than the SS keg and they're both empty. I figured the refrigerator magnet wouldn't stick at all, but I didn't want to order a neodymium super magnet kit just for you people

Just as an FYI, I tried scratching my AL turkey fryer pot when I got home from the storage unit, and apparently I'm a wuss because I couldn't scratch that at all either.
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Old 02-25-2009, 05:31 AM   #24
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Default Stainless Steel

Many kegs I have seen will have the material imprinted somewhere on the kegs, a very easy way to tell stainless steel from aluminum.

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Old 02-25-2009, 05:58 AM   #25
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so now we know that magnets only stick to ferrous metals like iron and cobalt and not to SS or Al. The easy test is weight.

lol...


also the "scratch test" isn't definitive either... maleability of aluminum is dependant on the alloy - some aluminum alloys are extremely hard and scratch resistant -but usually at the cost of being prone to cracking or shattering when struck with a heavy blow.

the guy with the angle grinder idea is probably the best way to be 100% sure...

YAY!!! SPARKS!!!
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Old 02-25-2009, 07:57 AM   #26
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Angle grinder, eh? Well it just so happens I bought an angle grinder not too long ago, I guess I can set up some sparkage in the morning.

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Old 02-25-2009, 09:48 PM   #27
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lol...


also the "scratch test" isn't definitive either... maleability of aluminum is dependant on the alloy - some aluminum alloys are extremely hard and scratch resistant -but usually at the cost of being prone to cracking or shattering when struck with a heavy blow.

the guy with the angle grinder idea is probably the best way to be 100% sure...

YAY!!! SPARKS!!!
Y'all are making this way too hard. Simply strike the keg sharply with a BFH. If the resulting tone is A sharp, it's SS. C flat, it's AL. If you use a really BFH, the aluminum dents easier than SS.

Beers,
Ken
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Old 05-14-2010, 09:21 PM   #28
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The scientist in me wants to say something...

If both kegs are negative for the magnet test, you have a null result for the scratch test, and you're not weighing them, then you have no reason to think that these kegs are even different material, let alone any indicator of which is which.

Both aluminum and SS can be shiny or dull. That's not really a fair indicator either.

A steel nail should scratch Al easily, but not SS. Hasn't anyone taken geology 101?

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Old 05-14-2010, 09:33 PM   #29
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Thank god this one came back from the dead!

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Old 05-14-2010, 09:39 PM   #30
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Ha! Sorry about that, I found this thread on google and I didn't realize how old it was before I posted.

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