Author Topic: 201 or 304 Stainless Steel  (Read 3664 times)

Offline skepace

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201 or 304 Stainless Steel
« on: September 12, 2012, 01:22:17 PM »
So I found a large stock pot that I can convert to a brew kettle since a buddy of mine can weld stainless steel.  But it is 201 stainless and not 304 like most kettles I see for sale.

Is there a big difference?  I know price to buy is about half. 

Thanks!

Offline hopfenundmalz

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Re: 201 or 304 Stainless Steel
« Reply #1 on: September 12, 2012, 01:33:48 PM »
Most everything I have is 304. Looking up on mr. google, it says 201 is low nickel, and not as weldable as 304.

Hope this helps.
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Offline skepace

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Re: 201 or 304 Stainless Steel
« Reply #2 on: September 12, 2012, 01:43:21 PM »
That would be a bummer!

Offline brewgyver

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Re: 201 or 304 Stainless Steel
« Reply #3 on: September 18, 2012, 04:46:51 PM »
That would be a bummer!

Indeed it would.  Stick with 304.  Also best not to mix fittings/parts of different alloys, eg 304 and 316.  I know they used different filler rod.

Offline harbicide

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Re: 201 or 304 Stainless Steel
« Reply #4 on: September 20, 2012, 10:05:26 AM »
Indeed it would.  Stick with 304.  Also best not to mix fittings/parts of different alloys, eg 304 and 316.  I know they used different filler rod.

304 and 316 can both be welded with Type 308 filler metals.  304 can be welded with 316.

For the base question, 201 contains probably about the same amount of chromium as a cheap chinese made 304 does.  With manganese replacing nickel it is known as the cheap man's austenitic.

From the Allegheny Ludlum website:
Welding
ATI 201 HP™ and ATI 201L HP™ can be welded by all conventional methods applied to 18 percent chromium, 8 percent nickel steels. Filler wire or electrodes of the conventional chromium-nickel analyses can be used. Like other chromium-nickel 300 series austenitic stainless steels where carbon is not controlled below 0.03%, ATI 201 HP™ alloy is sensitive to intergranular corrosion in the weld heat affected zone.
« Last Edit: September 21, 2012, 08:03:23 AM by dbeechum »
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Offline morticaixavier

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Re: 201 or 304 Stainless Steel
« Reply #5 on: September 20, 2012, 10:43:05 AM »
Indeed it would.  Stick with 304.  Also best not to mix fittings/parts of different alloys, eg 304 and 316.  I know they used different filler rod.

304 and 316 can both be welded with Type 308 filler metals.  304 can be welded with 316.

For the base question, 201 contains probably about the same amount of chromium as a cheap chinese made 304 does.  With manganese replacing nickel it is known as the cheap man's austenitic.

From the Allegheny Ludlum website:
Welding
ATI 201 HP™ and ATI 201L HP™ can be welded by all conventional methods applied to 18 percent chromium, 8 percent nickel steels. Filler wire or electrodes of the conventional chromium-nickel analyses can be used. Like other chromium-nickel 300 series austenitic stainless steels where carbon is not controlled below 0.03%, ATI 201 HP™ alloy is sensitive to intergranular corrosion in the weld heat affected zone.

ahh well that makes it clear  ;D
« Last Edit: September 21, 2012, 08:03:46 AM by dbeechum »
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Offline ckpash88

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201 or 304 Stainless Steel
« Reply #6 on: September 21, 2012, 11:08:57 PM »
You can weld stainless with regular mild steel wire or filler rod it will just rust at the weld. You can mix different alloys but it'll make interesting looking welds. I would say go for it and if it doesn't work get a different pot.


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Offline micsager

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Re: 201 or 304 Stainless Steel
« Reply #7 on: October 10, 2012, 08:25:55 AM »
John Palmer goes into metals quite extensively on an old Brewstrong episode.  And he's an expert in metals, so it must be good data.